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    • 专利摘要:
    The present invention relates to an impact-resistant polyamide composition. The present invention particularly relates to a transparent polyamide composition with improved impact resistance comprising a multi-layer polymer. More particularly, the present invention relates to the use of a multi-layer polymer as a modifier to improve impact resistance in a clear polyamide composition.
    公开号:FR3027908A1
    申请号:FR1460652
    申请日:2014-11-04
    公开日:2016-05-06
    发明作者:Frederic Malet
    申请人:Arkema France SA；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION [001] The present invention relates to an impact-resistant polyamide composition.  The present invention particularly relates to a transparent impact-resistant polyamide composition comprising a multi-layered polymer.  More particularly, the present invention relates to the use of a multilayer polymer as a modifier to improve impact resistance in a clear polyamide composition.  [Technical problem] [4] Of the high performance polymers, transparent polyamides are particularly advantageous because they have many mechanical properties, such as a certain impact resistance, a tensile and / or compressive strength, a resistance external attacks (such as heat, chemicals, UV radiation and the like) and transparency.  The arrival of objects based on polyamides, such as for example glasses frames, various housings, motor vehicle accessories, surgical materials, packaging or sports articles, has therefore been observed.  [5] In the field of transparent polyamides with high light permeability, two types of polymers are known, the amorphous polymers having only a glass transition temperature and the microcrystalline polymers having a glass transition temperature and a point fusion.  [006] The amorphous polyamides and the microcrystalline polyamides have improved transparency but generally have a Charpy notched specimen impact strength that does not exceed the range of 14 kJ / m 2 to 18 kJ / m 2 at 23 ° C.  [7] An object of the present invention is to provide a polyamide polymer composition.  5 transparent with increased impact resistance.  [8] Another object of the present invention is to provide a transparent polyamide polymer composition with increased impact resistance, while still maintaining the optical properties of said composition.  The optical properties relate in particular to the minimization of opacity (haze) and the maximization of light transmission of molded articles produced from the impact modified polyamide composition by molding.  [009] Another object of the present invention is to provide a transparent polyamide polymer composition with increased impact resistance, while still maintaining the other mechanical properties acceptable.  As regards the other mechanical properties, it is in particular to avoid a significant reduction in the modulus while improving the impact resistance of molded articles produced from the impact-resistant transparent polyamide composition.  BACKGROUND OF THE INVENTION Prior art [10] EP 0725101 discloses a transparent and colorless amorphous polyamide and molded articles.  The specimen impact strength cut at 23 ° C. is only 12 kJ / m 2.  The composition does not include modifiers to improve impact resistance.  [11] EP 1369447 discloses transparent polyamide molding materials having improved transparency, chemical resistance and high permanent fatigue resistance.  The molding may comprise a modifier to improve impact resistance such as terpolymers consisting of ethylene glycidyl methacrylate or polyethylene or propylene grafted with maleic anhydride.  [12] EP 1847569 discloses a transparent polyamide molding composition.  The molding composition comprises at least one transparent homopolyamide and / or copolyamide and a polyester-amide for increasing impact resistance.  A modifier for improving core-shell impact resistance is used as one of the comparative examples.  [13] US2009 / 0247699 discloses polyamide-based molding compounds for high-gloss-free, gloss-free, strong housings.  The molding compound contains two amorphous copolyamides and at least one modifier to improve impact resistance.  A preferred modifier for improving impact resistance is a core-shell type modifier based on methacrylates, butadiene and styrene (MBS copolymer).  [014] US2014 / 275392 discloses a polyamide molding compound and molded articles produced therefrom.  The polyamide molding compound comprises a block copolymer functionalized as a modifier to improve impact resistance.  Core-shell copolymers are used among other polymeric materials as a modifier to improve impact resistance in comparative examples only.  [BRIEF DESCRIPTION OF THE INVENTION] [015] Surprisingly, it has been discovered that a polymeric composition comprising: a) a transparent polyamide PA and b) a multilayered polymer characterized in that the composition satisfies the wherein k is the mole percent content of aromatic groups in polyamide PA, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is d at most 10, has an increase in impact resistance while having a light transmission of at least 75% (for a sheet of 2 mm thick).  [016] Surprisingly, it has also been discovered that a polymeric composition comprising: a) a transparent polyamide PA and b) a multilayered polymer characterized in that the composition satisfies the following formula: 1k-11 t wherein k is the mole percent content of aromatic groups in the polyamide PA, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is at most 10, has a increased impact resistance while still having a haze of less than 30% (for a 2 mm thick sheet).  [017] Surprisingly, it has also been discovered that a polymeric composition comprising: a) a transparent polyamide PA and b) a multilayered polymer characterized in that the composition satisfies the following formula: k-1! wherein k is the mole percent content of aromatic groups in the polyamide PA, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is at most 10, present an increase in impact resistance while still having a haze of less than 30% and a light transmission of at least 75% (for a sheet of 2 mm thickness).  [018] Surprisingly, it has also been discovered that a method of manufacturing a polymeric composition comprising the step of mixing a transparent polyamide PA and a multilayer polymer, characterized in that the composition satisfies the wherein k is the mole percent content of aromatic groups in polyamide PA, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is d at most 10, provides a polymer composition which exhibits an increase in impact resistance while having a light transmission of at least 75% and still having a haze of less than 25% (for a sheet 2 mm thick) compared to the same composition without multi-layer polymer.  According to a first aspect, the present invention relates to a polyamide-based polymeric composition comprising: a) a transparent polyamide PA and b) a multi-layered polymer characterized in that The composition has the following formula: wherein k represents the mole percent content of aromatic groups in the polyamide PA, 1 represents the mole percent content of aromatic monomers in the multi-polymer. layers, and the parameter t is at most 10.  According to a second aspect, the present invention relates to a polyamide based polymer composition comprising: a) a transparent polyamide having a melting enthalpy M of at most 7 J / g and b) a multi-layer polymer characterized in that the composition satisfies the following formula: where k represents the content in mole% of aromatic groups in the polyamide PA, 1 represents the level in mole% of aromatic monomers in the multi-layered polymer, and the parameter t is at most 10.  [21] According to a third aspect, the present invention relates to a method of manufacturing a polymeric composition comprising the step of mixing a transparent polyamide PA and a multi-layer polymer, characterized in that the composition satisfies the following foimule: wherein k represents the content in mole% of aromatic groups in the polyamide PA, 1 represents the level in mole% of aromatic monomers in the multilayered polymer, and the parameter t is not more than 10.  [22] The term "transparent", as used, refers to a light transmission of at least 75% measured on a 2 mm thick plate at 560 nm (ISO 134681/1996). [023] The term "Copolymer" as used means that the polymer consists of at least two different monomers.  [024] The term "multilayer polymer" as used refers to a polymer formed sequentially by a multi-step polymerization process.  A multi-stage emulsion polymerization process wherein the first polymer is a first-layer polymer and the second polymer is a second-layer polymer, c. -to-d.  that the second polymer is formed by emulsion polymerization in the presence of the first emulsion polymer, with at least two layers which are of different composition.  [25] The term "(meth) acrylic", as used, refers to any type of acrylic and methacrylic monomers.  [26] The term "(meth) acrylic polymer" as used indicates that the (meth) acrylic polymer comprises essentially polymers comprising (meth) acrylic monomers which constitute 50% by weight or more of the (meth) polymer acrylic.  [27] With respect to the polyamide of the composition 10 of the present invention, it is an amorphous or microcrystalline polyamide.  [28] Polyamides are termed amorphous if, in dynamic differential scanning calorimetry (differential scanning calorimetry, DSC) according to ISO 11357-3 / 2011, at a heating rate of 20 K / min, an AH fusion enthalpy is present. at most 7 J / g, preferably 3 J / g and more preferably at most 1 J / g.  [29] The polyamides are termed microcrystalline if they have, in differential dynamic calorimetry (differential scanning calorimetry, DSC), a glass transition temperature Tg and a melting point with a melting enthalpy AH of at least 7 days. / g and if they are transparent.  [30] The polyamide of the composition according to the invention has a glass transition temperature Tg of at least 100 ° C.  Tg is measured by dynamic differential scanning calorimetry (DSC) according to ISO 11357-2 / 2013.  The glass transition temperature Tg of the polyamide measured according to ISO 11357-2 / 2013 is preferably from 108 ° C to 192 ° C, and more preferably from 118 ° C to 172 ° C.  [31] The polyamide of the composition according to the invention is transparent.  "Transparent" means that the light transmission of a 2 mm thick sheet is at least 75%, measured at 560 nm (ISO 13468-1 / 1996), more preferably at least 80% %, advantageously at least 85% and particularly preferably at least 90%.  [32] The polyamide (PA) of the composition of the present invention is selected from a homopolyamide or a copolyamide.  [33] The homopolyamide of the composition of the present invention is not made from a lactam or aminocarboxylic acid.  The homopolyamide of the present invention is made from a diamine and a dicarboxylic acid.  The general formula (1) of this homopolyamide is [034] PA XX. YY (1) [35] wherein XX represents a diamine and YY represents a dicarboxylic acid, also simply named diacid.  [36] Diamines XX are linear or non-linear aliphatic diamines, or cycloaliphatic diamines, or diamines with partially aromatic structures.  Preferably, the diamine is branched or cycloaliphatic aliphatic.  [037] The diamine XX can be a cycloaliphatic diamine.  Of the cycloaliphatic diamines, those comprising two rings are preferred.  They correspond in particular to the following general formula: NH 2 [38] in which: [39] R 1 to R 4 represent identical or different groups chosen from a hydrogen atom or alkyl groups of 1 to 6 carbon atoms and X represents either a single bond, a divalent group composed of: a linear or branched aliphatic chain comprising from 1 to 10 carbon atoms, a cycloaliphatic group of 6 to 12 carbon atoms, a linear or branched aliphatic chain from 1 to 10 carbon atoms substituted with cycloaliphatic groups of 6 to 8 carbon atoms, or - from a group of 8 to 12 carbon atoms composed of a linear or branched dialkyl group comprising a cyclohexyl or benzyl group.  [40] More preferably, the cycloaliphatic diamine of the polyamide according to the invention is selected from bis (3,5-dialkyl-4-aminocyclohexyl) methane, bis (3,5-dialkyl-4-aminocyclohexyl) ethane bis (3,5-dialkyl-4-aminocyclohexyl) propane, bis (3,5-dialkyl-4-aminocyclohexyl) butane, bis (3-methyl-4-aminocyclohexyl) methane (BMACM or MACM), p-bis (aminocyclohexyl) methane (PACM) and isopropylidene di (cyclohexylamine) (PACP).  [41] A non-exhaustive list of cycloaliphatic diamines is available in the article "Cycloaliphatic Amines" (Encyclopaedia of Chemical Technology, Kirk-Othmer, 4th Edition (1992), p.  386-405).  [42] Still more preferably, and in order to obtain a transparent copolyamide, the cycloaliphatic diamine is selected from bis (3-methyl-4-aminocyclohexyl) methane (BMACM or MACM), p-bis (aminocyclohexyl) methane (PACM) and isopropylidene di (cyclohexylamine) (PACP).  [43] The diamine XX may have a partially aromatic structure.  Among the arylaromatic diamines, there may be mentioned 1,3-xylylenediamine (also known as meta-xylylenediamine or MXDA), 1,4-xylylenediamine (also known as paraxylylenediamine or PXDA) and mixtures thereof.  [044] The diamine XX of formula (1) can be aliphatic and linear, and has the general formula H2N (CH2) a-NH2.  Preferably, the diamine XX is chosen from butanediamine (a = 4), pentanediamine (a = 5), hexanediamine (a = 6), heptanediamine (a = 7) and octanediamine (a = 8). ), nonanediamine (a = 9), decanediamine (a = 10), undecanediamine (a = 11), dodecanediamine (a-12), tridecanediamine (a-13), tetradecanediamine (a-14) , hexadecanediamine (a = 16), octadecanediamine (a-18), octadecenediamine (a = 18), eicosanediamine (a = 20), docosanediamine (a = 22) and diamines obtained from of dimerized diacids.  The diamine XX of the formula (1) can be aliphatic and branched.  Preferably, the diamine XX is selected from 2-methyl-1,5-pentamethylenediamine, trimethyl-1,6-hexanediamine, 5-methylnonamethylenediamine and their isomers or mixtures.  [046] YY diacids of the formula (1) are aliphatic dicarboxylic acids or aromatic dicarboxylic acids or cycloaliphatic acids.  [47] The YY dicarboxylic acid can be linear and aliphatic, and has the general formula H000- (CH2) b-COOH.  Preferably, it comprises from 4 to 36 carbon atoms.  More preferably, it may be selected from sebacic acid (b = 8, 10 carbon atoms), dodecanedioic acid (b = 10, 12 carbon atoms), tetradecanedioic acid (b = 12, 14 carbon atoms), octadecanedioic acid (b = 16, 18 carbon atoms) and dimeric diacids with b - 34 (36 carbon atoms).  [48] The dimerized fatty acids mentioned below are dimerized fatty acids obtained by oligomerization or polymerization of unsaturated monobasic fatty acids comprising a long hydrocarbon chain (such as linoleic acid and oleic acid), as described. especially in EP 0 471 566.  [49] The dicarboxylic acid YY may be aromatic.  Preferably, it is selected from terephthalic acid, isophthalic acid, substituted aromatic dicarboxylic acid, for example 2,6-naphthalene dicarboxylic acid and 5-t-butylisophthalic acid.  [050] The dicarboxylic acid YY may be cycloaliphatic, with at least one cyclohexane ring.  Preferably, cycloaliphatic diacid is 1,4-cyclohexanedicarboxylic acid cyclohexanedicarboxylic acid.  or 1,2- (051) acid. The molar proportions of diamine XX and diacid YY of formula (1) are preferably stoichiometric.  [52] Among the combinations that can be envisaged for a homopolyamide of formula (1), by symbolizing bis (3-methyl-4-aminocyclohexyl) methane (BMACM) by the letter B, p-bis (aminocyclohexyl) methane (PACM) by the letter P, 2-methyl-1,5-pentamethylenediamine by the letters MPMD, trimethyl-1,6-hexanediamine by the letters TMD as diamines XX; and isophthalic acid by the letter I as the diacid or diacid YY of the general formula HOOC- (CH2) y-COOH comprising y methylene groups by the number y, the following homopolyamides are of particularly pronounced interest: TMD. T, TMD. I, TMD. 18, TMD. 14, TMD. 12, TMD. 10, MPMD. T, MPMD. I, MPMD. 18, MPMD. 14, MPMD. 12, MPDM. 10, B. 10, B. 11, B. 12, B. 13, B. 14, B. 16, 25 B. 18, B. 19, B. 20, B. 21, B. I, P. 10, P. 11, P. 12, P. 13, P. 14, P. 16, P. 18, P. 19, P. 20, P. I and P. 21.  Preferably, the homopolyamide is selected from TMD. T, TMD. I, MPMD. T, MPMD. I, B. 12, B. 14, B. 18, P. 12, P. 14 and P. 18, and more preferably from TMD. T, TMD. I, MPMD. T, MPMD. I, B. 12, B. 14, P. 12 and P. 14.  The copolyamide also called copolymer polyamide of the composition of the present invention comprises at least two distinct repeat units, these distinct units being formed from the two corresponding monomers or comonomers.  The copolyamides are therefore prepared from two or more monomers or comonomers selected from an amino acid, a lactam, a dicarboxylic acid and a diamine.  [54] The copolyamide according to the invention comprises at least two units (respectively represented by "Z" 5 and "XX. YY ") and corresponds to (i.e. at least comprises) the following general formula (2): [55] PA Z / XX. YY (2) [56] wherein Z represents a lactam L and / or an amino acid A, and XX represents a diamine and YY represents a dicarboxylic acid.  [57] The diamines are linear or non-linear aliphatic diamines, or cycloaliphatic diamines, or diamines with partially aromatic structures.  Preferably, the diamines are branched or cycloaliphatic aliphatic.  [58] The diacids are aliphatic dicarboxylic acids or aromatic dicarboxylic acids or cycloaliphatic acids.  [59] Preferably, the copolyamide according to formula (2) in the composition of the invention has a Z molar content of 6 mol% to 82 mol%, the molar content of diamine XX being 9% by weight. moles at 47 mol% and the molar content of diacid YY is also 9 mol% to 47 mol%.  More preferably, the molar content of Z is from 8 mol% to 40 mol%, the molar content of diamine XX is from 30 mol% to 46 mol% and the molar content of diacid YY also 30 mol% to 46 mol%.  [060] The choice of such molar contents. allows to obtain, in the majority of the cases, a copolyamide having a high transmission of the light.  [061] Lactam L is selected from γ-pyrrolidone (lactam 4), piperidinone (lactam 5), caprolactam (lactam 6), enantholactam (lactam 7), caprylolactam (lactam 8), pelargolactam (lactam 9), decanolactam (lactam 10), undecanolactam (lactam 11) and laurolactam (lactam 12) and preferably laurolactam.  [062] The aminocarboxylic acid A is chosen from 9-aminononanoic acid, 10-aminodecanoic acid, 12-aminododecanoic acid and 11-aminoundecanoic acid and its derivatives, in particular N-heptyl acid. 11-aminoundecanoic acid, and preferably 12-aminododecanoic acid and 11-aminoundecanoic acid.  [063] In place of an amino acid A or lactam L, it may also be possible to envisage a mixture of two, three amino acids and / or lactams or more.  However, the copolyamides formed would then comprise respectively three or four units or more.  It is specified that the specific case of such a copolyamide comprising three or more distinct units is described by formula (2).  (064) The diamine XX of formula (2) is selected from the same diamines as the diamines indicated for formula (1).  [65] The diacid YY of the formula (2) is selected from the same diacids as the diacids indicated for the formula (1).  [66] The molar proportions of diamine XX and diacid YY of formula (2) are preferably stoichiometric.  [67] Among the combinations which can be envisaged for the copolyamide of general formula (2), the resulting unit of 11-aminoundecanoic acid being symbolized by the number 11, the unit resulting from laurolactam being symbolized by the number 12, the resulting unit of terephthalic acid being symbolized by the letter T, the following copolyamides are of particularly pronounced interest: 11 / B. I, 11 / B. T, 12 / B. I, 35 12 / B. T, 11 / B. 10, 12 / B. 10, 11 / P. 10, 12 / P. 10, 11 / B. 12, 12/3. 12, 11 / P. 12, 12 / P. 12, 11/3. 14, 12/3. 14, 11 / P. 14, 12 / P. 14, 11 / B. 18, 12 / B. 18, 11 / P. 18 and 12 / P. 18.  [68] Preferably, the copolyamide of formula (2) is selected from 11/3. 1, 11 / B. T, 12 / B. I, 12 / B. T, 11/3. 10, 11 / P. 10, 11 / B. 12, 12 / B. 12, 11 / P. 12, 12 / P. 12 and 11 / B. 14, more preferably from 11/3. I, 12 / B. I, 11 / B. 10, 11 / P. 10, 11/8. 12, 12 / B. 12.  [69] According to a third variant of the polyamide of the composition of the invention, the (co) monomer or unit Z 10 in the general formula (2) of copolyamide PA Z / XX. YY is a unit corresponding to formula (3a): [70] VV. WW (3a) [71] and the copolyamide corresponds to the formula (3h) [72] VV. WW / XX. YY (3b) [073] wherein VV is a diamine and WW is a dicarboxylic acid.  [074] The diamines are linear or non-linear aliphatic diamines, or cycloaliphatic diamines, or diamines with partially aromatic structures.  [075] The diacids are aliphatic dicarboxylic acids or aromatic dicarboxylic acids or cycloaliphatic acids.  [76] Very clearly, the specific cases in which comonomers or units XX. YY and VV. WW are strictly identical are excluded in formulas (3a) and (3b), since these would already correspond to the homopolyamide of formula (1).  [77] The diamine VV may be a cycloaliphatic diamine.  Reference is made to the foregoing description of a cycloaliphatic diamine for the diamine of comonomer or unit XX. YY.  [78] The diamine VV may have a partially aromatic structure.  Reference is made to the foregoing description of a partially aromatic diamine for the diamine of comonomer or unit XX. YY.  [79] The diamine VV can be aliphatic and linear, and has the general formula H2N- (CH2) a-NH2.  Preferably, the diamine XX is chosen from butanediamine (a = 4), pentanediamine (a = 5), hexanediamine (a = 6), heptanediamine (a-7) and octanediamine (a-8). ), nonanediamine (a-9), decanediamine (a = 10), undecanediamine (a-11), dodecanediamine (a = 12), tridecanediamine (a = 13), tetradecanediamine (a = 14) , hexadecanediamine (a = 16), octadecanediamine (a = 18), octadecenediamine (a-18), eicosanediamine (a-20), docosanediamine (a = 22) and diamines obtained from dimer fatty acids.  [080] The diamine VV may be aliphatic and branched.  Preferably, the diamine VV is selected from 2-methyl-1,5-pentamethylenediamine, trimethyl-1,6-hexanediamine, 5-methylnonamethylenediamine and their isomers or mixtures.  [081] The WW dicarboxylic acid may be aliphatic and linear, and has the general formula HOOC- (CH2) b-COOH.  Preferably, it comprises from 4 to 36 carbon atoms.  More preferably, it may be selected from sebacic acid (b = 8, 10 carbon atoms), dodecanedioic acid (b = 10, 12 carbon atoms), tetradecanedioic acid (b = 12, 14 carbon atoms), octadecanedioic acid (b = 16, 18 carbon atoms) and dimerized fatty acids with b = 34 (36 carbon atoms).  [082] The dicarboxylic acid WW may be aromatic.  Preferably, it is selected from terephthalic acid, isophthalic acid, substituted aromatic dicarboxylic acid, for example 2,6-naphthalene dicarboxylic acid and 5-t-butylisophthalic acid. [083] Acid WW dicarboxylic acid can be cycloaliphatic, with at least one cyclohexane ring.  Preferably, this cycloaliphatic diacid is 1,4-cyclohexanedicarboxylic acid or 1,2-cyclohexanedicarboxylic acid.  [084] For the preferred choice of the diacid WW of the comonomer or unit VV. WW in formula (3a), reference is made to the foregoing description of the preferred diacid for diacid YY of the comonomer or unit XX. YY describes in formula (2).  [85] The molar proportions of diamine VV and diacid WW of formulas (3a) and (3b) are preferably stoichiometric.  [86] Among the combinations that can be envisaged for the copolyamide of composition VV. WW / XX. YY, the diacid WW comprising w carbon atoms being symbolized by the number w, the copolyamides corresponding to one of the formulas 6 are chosen in particular. 10 / B. I, 6. 10 / B. T, 10. 10 / B. I, 10. 10 / B. T, 6. 12 / B. I, 6. 12 / B. T, 10. 12 / B. I, 10. 12 / B. T, 6. 10 / P. I, 6. 10 / P. T, 10. 10 / P. I, 10. 10 / P. T, 6. 12 / P. I, 6. 12 / P. T, 10. 12 / P. I, 10. 12 / P. T, 6. 10 / B. 10, 6. 10 / B. 12, 6. 10 / B. 14, 6. 10 / B. 18, 10. 10 / B. 10, 10. 10 / B. 12, 10. 10 / B. 14, 10. 10 / B. 18, 10. 12 / B. 10, 10. 12 / B. 12, 10. 12 / B. 14, 10. 12 / B. 18, 6. 10 / P. 10, 6. 10 / P. 12, 6. 10 / P. 14, 6. 10 / P. 18, 10. 10 / P. 10, 10. 10 / P. 12, 10. 10 / P. 14, 10. 10 / P. 18, 10. 12 / P. 10, 10. 12 / P. 12, 10. 12 / P. 14, 10. 12 / P. 18, B. 10 / P. 10, B. 12 / P. 12 and 20 B. 14 / P. 14, more preferably B. 12 / P. 12, B. 10 / P. 10, B. 14 / P. 14, 10. 10 / B. I, 10. 12/13. 1, 10. 10 / B. 10, 10. 10 / P. 10, 10. 10 / B. 12, 10. 10 / P. 12, 10. 12 / P. 12, 10. 12 / B. 12, 10. 12 / B. 10 and 10. 12 / P. 10, preferably 10. 10 / B. I, 10. 10 / B. T, 10. 12 / B. I, 10. 12 / B. T, 10. 10 / P. I, 25 10. 10 / P. T, 10. 12 / P. I, 10. 12 / P. T, 6. 10 / B. 10, 10. 10 / B. 10, 10. 12 / B. 10, 6. 10 / P. 10, 10. 10 / P. 10, 10. 12 / P. 10, 10. 10 / B. 12, and 10. 12 / B. 12, more preferably 10. 10 / B. I, 10. 12 / B. I, 10. 10 / B. 10, 10. 10 / P. 10, 10. 10 / B. 12, 10. 10 / P. 12, 10. 12 / P. 12 and 10. 12 / B. 12.  [087] According to another aspect of the invention, the copolyamide described by the general formula (2) and / or (3) further comprises at least a third unit which is shown below as UU. TT in formula (4): [088] Z / XX. YY / UU. TT (4) [089] wherein UU represents a diamine and TT represents a dicarboxylic acid, and Z represents a lactam L and / or an amino acid A.  [90] The diamine XX of the formula (4) is selected from the same diamines as the diamines indicated for the formula (1).  [91] The diacid YY of the formula (4) is selected from the same diacids as the diacids indicated for the formula (1).  [92] The diamines UU of the formula (4) are linear or non-linear aliphatic diamines, or cycloaliphatic diamines, or diamines with partially aromatic structures.  Preferably the UU diamines are branched aliphatic or cycloaliphatic.  [93] TT diacids are aliphatic dicarboxylic acids or aromatic dicarboxylic acids or cycloaliphatic acids.  Preferably, at least one of the diacids YY or TT in the formula (4) is an aromatic dicarboxylic acid.  [94] L-lactam and / or amino acid A for Z in formula (4) are the same as previously defined.  [095] Very clearly, the specific cases in which comonomers or units XX. YY and UU. TT are strictly identical are excluded.  According to an advantageous version of the invention, the molar content of Z is from 10 mol% to 82 mol%, the molar content of the mixture of diamines XX + UU being from 9 mol% to 45 mol%. moles and the molar content of mixture of diacids YY + TT also being 9 mol% to 45 mol%.  [97] According to a preferred version of the invention, the molar content of Z is from 10 mol% to 46 mol%, the molar content of diamine XX being from 27 mol% to 45 mol% and the content YY diacid molar being also from 27 mol% to 45 mol%.  [98] The choice of such molar contents makes it possible in most cases to obtain a copolyamide having a high light transmission.  [099] The molar proportions of diamine UU and diacid TT of formula (4) are preferably stoichiometric.  In the present description of formula (2) and (4), the term "at least" means that the copolyamide according to the invention comprises the formula made explicit, respectively containing 2 and 3 units comprising the first 2 units. however, this 2 unit or 3 unit formula may be included in a formula of a copolyamide further comprising other different units.  A copolyamide according to the invention can thus comprise 4, 5 or 6, etc.  different units, provided that they include at least the 2 units Z / XX. YY or the 3 units Z / XX. YY / UU. TT.  [0101] Among the combinations that can be envisaged for the copolyamide of composition Z / XX. YY / UU. TT, the diacid TT comprising t carbon atoms being symbolized by the number t, the copolyamides corresponding to one of the formulas 12 / B are chosen in particular. I / B. T, 11 / B. I / B. T, 12 / P. I / P. T, 11 / P. I / P. T, 12 / B. 10 / B. I, 12 / B. 10/3. T, 11 / B. 10 / B. I, 11 / B. 10 / B. T, 12/3. 12/3. 1, 12 / B. 12 / B. T, 11/13. 12/3. I, 11 / B. 12 / B. T, 12 / P. 10 / P. I, 12 / P. 10 / P. T, 11 / P. 10 / P. I, 11 / P. 10 / P. T, 12 / P. 12 / P. I, 12 / P. 12 / P. T, 11 / P. 12 / P. I, 11 / P. 12 / P. T, 25 11 / B. 10 / B. 14, 11 / P. 10 / P. 14, 11/13. 12/3. 14, 11 / P. 12 / P. 14, 12 / B. 10/3. 14, 12 / P. 10 / P. 14, 12/3. 12 / B. 14, 12 / P. 12 / P. 14, 11 / B. 10 / B. 12, 11 / P. 10 / P. 12, 12 / B. 10 / B. 12, 12 / P. 10 / P. 12, 11 / P. 12 / B. 12, 12 / P. 12 / B. 12, 11 / P. 10/3. 10 and 12 / P. 10/3. 10, preferably 12 / B. I / B. T, 11 / B. I / B. T, 12 / P. I / P. T, 11 / P. I / P. T, 12 / B. 10 / B. I, 11 / B. 10 / B. I, 12 / B. 10 / B. T, 11 / B. 10 / B. T, 11 / B. 10 / B. 12, 11 / P. 10 / P. 12, 12 / B. 10 / B. 12, 12 / P. 10 / P. 12, 12 / P. 10 / P. T, 11 / P. 10 / P. I, 12 / P. 10 / P. I and 11 / P. 10 / P. T, more preferably 12 / B. I / 3. T, 11 / B. I / B. T, 12 / P. I / P. T, 11 / P. I / P. T, 35 12 / B. 10 / B. I, 11/3. 10 / B. I, 12 / B. 10 / B. T and 11 / B. 10 / B. T.  A composition of a transparent PA according to formula (1) or formula (2) and / or formula (3b) or formula (4) may further comprise at least one second polymer.  Advantageously, this second polymer may be chosen from a semi-crystalline polyamide, an amorphous polyamide, a semi-crystalline copolyamide, an amorphous copolyamide, a polyether-amide, a polyester-amide and mixtures thereof.  The multilayered polymer of the composition according to the invention comprises at least two layers of different polymer composition.  The multilayered polymer comprises from 0 to 50% by weight of monomers comprising an aromatic group.  The multilayered polymer is preferably in the form of spherical polymer particles.  These particles are also called core-bark particles or core-shell polymers.  The first layer forms the core, the second or all subsequent layers form the respective barks.  As regards the spherical polymer particle, it has a mean particle size by weight of between 20 nm and 500 nm.  Preferably, the weight average particle size of the polymer is between 20 nm and 400 nm, more preferably between 20 nm and 350 nm and advantageously between 20 nm and 300 nm.  [010 /] The polymeric particle has a multilayer structure comprising at least one layer (A) comprising a polymer (A1) having a glass transition temperature of less than 0 ° C and another layer (B) comprising a polymer (B1) having a glass transition temperature above 60 ° C.  Preferably, the polymer (B1) having a glass transition temperature greater than 60 ° C is the outer layer of the polymeric particle multilayer structure.  The polymeric particle according to the invention is obtained by a multi-step process, such as two or three or more steps.  Preferably, the polymer (A1) having a glass transition temperature of less than 0 ° C. in the layer (A) is manufactured during the first step of the multi-stage process forming the core of the multilayer structure polymer particle. .  Preferably, the polymer (A1) has a glass transition temperature of less than -5 ° C, more preferably less than -15 ° C, preferably less than -25 ° C.  Preferably, the polymer (B1) having a glass transition temperature greater than 60 ° C is manufactured during the last step of the multi-stage process forming the outer layer of the polymeric particle multilayer structure.  One or more additional intermediate layers obtained by one or more intermediate steps may be present.  The glass transition temperature Tg of the multi-layer polymer can be estimated, for example, by dynamic methods such as thermomechanical analysis.  The polymer (A1) and the layer (A) comprise from 0% by weight to less than 50% by weight of monomers containing aromatic groups.  Polymer (B1) and layer (B) comprise from 0% by weight to less than 50% by weight of monomers containing aromatic groups.  According to one embodiment, the polymer (B1) and the layer (B) do not comprise monomers containing aromatic groups.  As regards the polymer (N1) having a glass transition temperature below 0 ° C., it comprises at least 50% by weight of polymeric units derived from isoprene or butadiene and the layer (A). is the innermost layer of the polymeric particle 35 with a multilayer structure.  In other words, the layer (A) comprising the polymer (A1) is the core of the polymeric particle.  By way of example, the polymer (A1) of the core may consist of homopolymers of isoprene or of butadiene homopolymers, of isoprene-butadiene copolymers, of isoprene copolymers with at most 98% 5% by weight of a vinyl monomer and butadiene copolymers with not more than 98% by weight of a vinyl monomer.  The vinyl monomer may be styrene, alkylstyrene, acrylonitrile, alkyl (meth) acrylate or butadiene or isoprene or mixtures thereof, since the polymer (Al) comprises less than 50% by weight of monomers containing aromatic groups.  The polymer (A1) may be crosslinked.  Crosslinking monomers useful in the present invention include, but are not limited to, polyfunctional aromatic vinyl compounds such as divinylbenzene and divinyltoluene, polyhydric alcohols such as ethylene glycol dimethacrylate and 1,3-butanediol diacrylate, trimethacrylates, triacrylates, allyl carboxylates such as allyl acrylate and allyl methacrylate, and di- and tri-allylic compounds such as diallyl phthalate, diallyl sebacate and triallyltriazine .  According to one embodiment, the core is a homopolymer of butadiene.  According to another embodiment, the core is a butadiene-styrene copolymer.  More preferably, the glass transition temperature Tg of the polymer (A1) comprising at least 50% by weight of polymer units derived from isoprene or butadiene is between -100 ° C. and 10 ° C., even more preferably between -80 ° C and 0 ° C and preferably between -70 ° C and -20 ° C.  As regards the polymer (B1), mention may be made of homopolymers and copolymers comprising monomers containing double bonds and / or vinyl monomers.  Preferably, the polymer (B1) is a (meth) acrylic polymer.  Preferably, the polymer (B1) comprises at least 70% by weight of monomers chosen from C1 to C12 alkyl (meth) acrylates.  Even more preferably, the polymer (B1) comprises at least 80% by weight of C1 to C4 alkyl methacrylate monomers and / or C1 to C8 alkyl acrylate monomers.  In the most preferred manner, the polymeric (B 1) or methacrylic acrylic monomers of 10 are chosen from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate and methacrylate. ethyl, butyl methacrylate and mixtures thereof, since the polymer (B1) has a glass transition temperature of at least 60 ° C.  The polymer (B1) may be functional chosen from glycidyl, acrylic or methacrylic acid, amides derived from these acids, such as, for example, dimethylacrylamide, 2-methoxyethyl acrylate or methacrylate, acrylates or 2-aminoethyl methacrylates and mixtures thereof  [0125] Advantageously, the polymer (B1) comprises at least 70% by weight of monomeric units derived from methyl methacrylate.  Preferably, the glass transition temperature Tg of the polymer (B1) is between 60 ° C and 150 ° C.  The glass transition temperature of the polymer (B1) is more preferably from 80 ° C to 150 ° C, preferably from 90 ° C to 150 ° C, and more preferably from 100 ° C to 150 ° C.  Preferably, the polymer (B1) is grafted onto the polymer manufactured in the previous step.  In some embodiments, the polymer (B1) is crosslinked.  The multilayered polymer of the composition according to the invention is obtained by a multistage process comprising at least two steps.  Such a method is described for example in US2009 / 0149600 or EP0722961.  Preferably, the polymer (A1) having a glass transition temperature below 0 ° C made during step (A) is the first step of the multi-step process.  Preferably, the polymer (B1) having a glass transition temperature greater than 60 ° C made during step (B) is manufactured after step (A) of the multistage process.  . More preferably, the polymer (B1) having a glass transition temperature greater than 60 ° C made during step (B) is the outer layer of the polymeric particle multilayer structure.  Additional intermediate steps between step (A) and step (B) may be present.  In order to obtain a sample of the polymers (A1) and (B1) respectively, they can be prepared alone and not by a multistage process, in order to estimate and measure more easily the glass transition temperature Tg individual respective polymers of the respective layers.  The weight ratio of the polymer (A1) of the layer included in step (A) relative to the complete multilayer polymer is at least 60% by weight, preferably at least 70% by weight. by weight, more preferably at least 75% by weight.  The ratio by weight rb of the polymer (B1) of the outer layer included in step (B) relative to the complete multilayer polymer is at least 5% by weight, preferably at least 6 % by weight, more preferably at least 7% by weight.  According to the invention, the ratio rb between the outer layer (B) comprising the polymer (B1) and the complete multilayer polymer is at most 30% by weight.  Preferably, the ratio between the polymer (B1) and the complete multilayer polymer is between 5% by weight and 30% by weight.  Another aspect of the present invention is the use of a multi-layer polymer as previously described as a modifier to improve impact resistance for a clear polyamide.  As regards the polymeric composition of polyamide according to the invention, it comprises: a) a transparent polyamide and b) a multilayered polymer characterized in that the composition satisfies the following formula: lk-11 t 15 in wherein k is the mole percent content of aromatic groups in the polyamide PA, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is at most 10.  Preferably, t is at most 7, more preferably at most 5, even more preferably at most 3, and most preferably at most 1.  The polyamide polymer composition according to the invention comprises between 1% by weight and 80% by weight, preferably between 2% by weight and 70% by weight, more preferably between 3% by weight and 50% by weight. in weight, advantageously between 3% by weight and 30% by weight and more preferably between 3% by weight and 25% by weight of the multi-layer polymer.  The transparent polyamide is chosen according to formula (1) or formula (2) and / or formula (3b) or formula (4).  Preferably, the polyamide-based polymer composition according to the invention comprises: a) a transparent polyamide and b) a multi-layer polymer comprising a layer (A) comprising a polymer (Al) having a transition temperature vitreous lower than 0 ° C and a layer (B) comprising a polymer (B1) having a glass transition temperature of at least 60 00, and is characterized in that the composition satisfies the following formula: ik-11 t wherein k represents the content in mole% of aromatic groups in the polyamide PA, 1 represents the level in mole% of aromatic monomers in the multi-layered polymer, and the parameter t is at most 10.  The transparent polyamide is chosen according to formula (1) or formula (2) and / or formula (3b) or formula (4).  The multilayered polymer comprising a layer (A) comprising a polymer (Al) having a glass transition temperature of less than 0 ° C and a layer (B) comprising a polymer (B1) having a glass transition temperature of at least 60 ° C is obtained by a multistage process.  [0147] Preferably, the polymer (A1) having a glass transition temperature below 0 ° C made during step (A) is the first step of the multi-step process.  Preferably, the polymer (B1) having a glass transition temperature above 60 ° C made during step (B) is manufactured after step (A) of the multistage process.  More preferably, the polymer (B1) having a glass transition temperature greater than 60 ° C made during step (B) is the outer layer 35 of the multilayer structure polymer particle.  The preferred and advantageous variants of the multistage process and of the process for producing the polymer obtained by the multistage process are the same as previously defined.  The respective layers (A) and (B) respectively comprising the polymers (A1) and (B1) are the same as defined above.  The polyamide polymer composition according to the invention exhibits Charpy notched impact strength at 23 ° C. of at least 30 kJ / m 2, preferably of at least 40 kJ / m 2 and more preferably at least 50 kJ / m2.  The polymeric composition based on polyamide according to the invention has a transmission of light at 560 nm for a sheet of 2 mm thickness of at least 75%, preferably at least 80% and so more preferably at least 88%.  The polyamide polymer composition according to the invention has a haze for a sheet 2 mm thick by at most 30%, preferably at most 20% and more preferably at most 10% by weight. %.  Another aspect of the present invention is a process for producing a polymeric composition comprising the step of mixing a transparent polyamide PA and a multilayered polymer, characterized in that the composition satisfies the wherein k is the mole% content of aromatic groups in PA polyamide, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is d 'at most 10.  The transparent polyamide is selected according to formula (1) or formula (2) and / or formula (3b) or formula (4).  The polymeric composition produced according to the process of the invention comprises between 1% by weight and 80% by weight, preferably between 2% by weight and 70% by weight, more preferably between 3% by weight. and 50% by weight, preferably between 3% by weight and 30% by weight and more preferably between 3% by weight and 25% by weight of the multi-layer polymer obtained by the multistage process.  The polymeric compositions based on polyamide according to the invention are not restricted.  All current additives for polyamide-based compositions can be added.  Preferably, the additives are selected from the group consisting of inorganic and organic stabilizers, especially antioxidants, antiozonants, photoprotective agents, UV stabilizers, UV absorbers or UV blockers, lubricants, dyes, marker agents , pigments, carbon black, graphite, titanium dioxide, zinc sulfide, zinc oxide, barium sulfate, carbon fibers, glass fibers, glass beads, nanotubes of carbon, photochromic agents, antistatic agents, release agents, optical brighteners, halogenated flame retardants, halogen-free flame retardants, natural phyllitic silicates, synthetic phyllitic silicates and mixtures thereof.  Another aspect of the present invention is the use of the polyamide-based polymer composition for the production of transparent articles.  Another aspect of the present invention is the use of the polyamide-based polymeric composition for impact resistance injection molding compounds.  [0161] A further aspect of the present invention is a transparent article comprising at least one region or layer composed of a polyamide-based polymeric composition as described above.  It is particularly preferably a molding, a sheet, a profile, a tube, a hollow body or an optically variable filter or an optical lens, preferably an ophthalmic lens, particularly preferably a spectral filter element, e.g.  ex.  in the form of a spectacle lens, a sunglass lens, a corrective lens, an optical filter, inspection lenses, sports glasses or ski goggles, visors, safety glasses, optical recording systems, flow meters, bursting disks, screens, optical data storage, housings or parts of housings, in particular for shaving apparatus, hair removal devices, devices measuring device, or a window in buildings or in vehicles, or it is a decorative element or a structural element, p.  ex.  in the form of a frame of glasses or glasses, A toy, or in the form of a part of a sports shoe, or golf equipment, including a golf ball , or a cover, in particular in the form of a mobile phone case, a part of electronic equipment, storage media, infrared keys, transportable recordable devices, digital personal digital assistants, smartphones, a coating, in particular a packaging, decorative elements, or sports equipment, or a veneer, preferably in the automotive sector.  The article may have a color, including a color gradient, an antireflection coating, a scratch resistant coating, an optical filter coating, a polarizing coating, an oxygen barrier coating, or a combination of these coatings.  The present invention also relates to a process for the preparation of a polyamide-based polymer composition as described above.  The process is in particular a process which comprises mixing the homopolyamide and / or copolyamide in the form of pellets, and also the multi-layer polymer in the form of a powder, granules, compacted powder or of a masterbatch, and molding them in an extruder at melt temperatures in the range of 220 ° C to 350 ° C to obtain an extrudate, and cutting with appropriate pelletizers to obtain pellets, preferably using a melt filter on the extruder to remove contamination of the molding compositions for transparent moldings, suitable melt filters being those that can be constructed from sieves in the form of sheets or in the form of filtration candles, with the possibility, during the kneading process, of adding additives which are desirable for the modification of the molding composition, e.g.  ex.  machining stabilizers, colored pigments, UV absorbers, thermal stabilizers, flame retardants, other transparent polyamides.  The present invention also relates to a process for the preparation of a polyamide-based polymer composition as described above.  For the production of the polyamide molding compound, the components are mixed in normal kneading machines, such as p.  ex.  single- or twin-screw extruders or screw mixers.  The components are individually dosed in the feed or introduced as a dry mix.  The process is in particular a process which comprises mixing the homopolyamide and / or copolyamide in the form of pellets, and also the multi-layer polymer in the form of a powder, granules, compacted powder or of a master mix.  The additives can be used directly or in the form of a masterbatch.  The carrier material 30 of the masterbatch is preferably a polyolefin or a polyamide.  Among the polyamides, PA 6, PA 12, PA 11 or the polyamide or copolyamide described in the present invention are particularly suitable.  For the production of a dry mix, the dried aggregates and / or optionally other additives are mixed together.  This mixture is homogenized by means of a drum mixer, a drum and circle mixer or a drum dryer for 10 to 40 minutes.  In order to avoid the absorption of moisture, this can be done under a dried protective gas.  The mixing is carried out at fixed cylinder temperatures of 220 ° C to 310 ° C in a COPERION ZSK 26MC twin screw extruder.  A vacuum can be applied in front of the nozzle or degassing can take place in the atmosphere.  The melt is extruded, cooled and cut with appropriate pelletizers, preferably using a melt filter on the extruder to remove the contamination of the molding compositions for transparent moldings, suitable melt filters being those which can be constructed from sieves in the form of sheets or in the form of filter candles.  The granulate is dried for 12 to 24 hours at 80 to 120 ° C under nitrogen or under vacuum to achieve a water content of less than 0.1 percent by weight.  The present invention also relates to a method for producing an article as described above, which comprises molding a polyamide molding composition as described above by an extrusion process, by a molding process. extrusion blow molding, by an injection molding process or by a mold coating process, to obtain the article.  [Methods] 10170] The tested samples of the polyamide-based polymeric composition described in the present invention are produced by an ENGEL VC 500/160 TECH injection molding machine.  Cylinder temperatures of 270 ° C to 300 ° C are used.  The temperature of the mold is 65 ° C.  In the case of plates used for the measurement of light transmission and haze, a polished mold is used.  The glass transition temperature of the polyamide The glass transition temperature Tg of the polyamide is measured on pellets using a TA Q2000 apparatus, according to the ISO 11357-2 / 2013 standard at a heating rate of 20 K / min.  [0172] Glass Transition Temperature of the Multi-Layered Polymer The glass transitions (Tg) of the multi-layer polymers are measured with equipment capable of performing a thermomechanical analysis.  A RDAII "RHEOMETRICS DYNAMIC ANALYZER" proposed by the company Rheometrics is used.  Thermomechanical analysis precisely measures the viscoelastic changes of a sample as a function of temperature, tension or deformation applied.  The apparatus continuously records the deformation of the sample, maintaining the fixed voltage, during a controlled program of temperature variation.  The results are obtained by representing, as a function of temperature, the elastic modulus (G '), the loss modulus and the delta tan.  The highest read on tan delta derivative [0173] The Tg modules is the temperature value of the tan delta curve, when is equal to zero.  The tensile strength of compositions of the polyamide are measured according to ISO 527-2 / 2012 on an ISO: ISO / CD 3167, type Al test specimen, 170 x 20/10 x 4 mm, at a temperature of 23 ° C.  [0174] The impact strength on notch cut according to Charpy is measured according to the ISO 179-2 / 1997 / * eA standard, on an ISO: ISO / CD 3167, type Bi test specimen, 80 × 10 × 4 mm, at a distance of temperature of 23 ° C and -30 ° C.  [0175] Transmission of light Light transmissions are measured on a Konica-Minolta CM-3610A spectrophotocolorimeter, according to la. ASTM D 1003/1997 standard, on 100 x 100 mm plates 2 mm thick, with illuminant. D65 at 560 nm.  The transmissions of light are indicated in% of the amount of light to which the plate has been exposed.  The turbidity values are measured on a Konica-Minolta CM-3610A spectrophotocolorimeter, according to ASTM standard D 1003/1997, with a CIE type C standard illuminant, on 100 × 100 mm plates with a thickness of 2 mm.  Disturbance values are shown as% of the amount of light the plate was exposed to.  Examples [0177] Raw materials [0178] PA1 is the copolyamide PA 11 / B. According to formula (2) with a molar ratio of 10/90 and having a Tg of 150 ° C.  PA1 does not contain an aromatic unit.  PA2 is the copolyamide PA 12 / B. I / B. T having a Tg of 170 ° C, according to formula (4) with a molar ratio of 35/20/45.  The modified to improve the multi-layer impact resistance (IN) can be synthesized according to US 2009/149600 or EP 0722961.  A first modifier to improve the multi-layer impact resistance of Examples 1 and 2 is manufactured according to the synthesis described in US 2009/149600.  A multilayered polymer is synthesized according to Example 1 of US 2009/149600 as a first layer and according to Example 6 as a second layer, to obtain a multilayer polymer MBS1, not including styrene, or aromatic monomer unit.  A second modification to improve the multilayer impact resistance of the examples is made according to EP 0722961 to obtain a multilayer polymer MBS2, comprising 33% by weight of styrene or aromatic monomer unit.  [0183] Comparative Example 1 is an unmodified impact-resistant copolyamide PA1.  Example 1 is a compound comprising 5% by weight of MBS1 in PAl.  Example 2 is a compound comprising 10% by weight of MBS1 in PA1.  Example 3 is a compound comprising 15% by weight of MBS1 in PAl.  PA2 to [0187] Comparative Example 2 is an unmodified impact resistance copolyamide.  Example 4 is a compound comprising 5% by weight of MBS2 in PA2.  Example 5 is a compound comprising 10 by weight of MBS2 in PA2.  Example 6 is a compound comprising 15% by weight of MBS2 in PA2.  Table 1 Characteristics of a composition containing polyamide PA1 and MBS1 Example Example Example Comparative Example 1 2 3 1 PA1 PA1 PA1 PA1% by weight of multilayer polymer MBS1 in the composition Resistance to 54 l impact at 23 ° C / [kJ / m2] Resistance at 8 24 35 47 impact at -30 ° C / [kJim2] Modulus of 1 690 1 630 1 518 1 421 traction [MPa] Trouble [%] 4, 6 8.9 13.6 Transmission of 90.5 88.9 87.3 86.2 light [%] [0192] The impact resistance of examples 1, 2 and 3 according to the invention increases considerably, while that the reduction of the modulus, the transmission of light and the increase of the disorder remains acceptable.  Table 2 Characteristics of a composition containing polyamide PA2 and MBS2 Example Example Example Comparative Example 4 5 6 2 PA2 PA2 PA2 PA2% by weight of multilayered polymer MBS2 in the composition Resistance to 32 32 43 37 Impact at 23 ° C / [kJ / m2] Resistance at 15 20 21 19 Impact at -30 ° C / [kJ / m2] Modulus of 2,100 1,930 1,901 1,697 Traction [MPa] Trouble [ %] 0.6 4.7 11.9 15.6 Transmission of 90.9 88.9 87.7 87.0 light [%] 10 [0194] The impact resistance of Examples 4, 5 and 6 according to the invention increases considerably, while the decrease in the modulus, the transmission of light and the increase in the disorder remains acceptable.
    权利要求:
    Claims (3)
    [0001]
    REVENDICATIONS1. A polyamide based polymer composition comprising: a) a transparent polyamide PA and b) a multilayered polymer characterized in that the composition has the following formula: wherein k represents the content in mole% of aromatic groups in PA polyamide, 1 represents the mole% content of aromatic monomers in the multilayered polymer, and the parameter t is at most 10.
    [0002]
    2. Polymeric composition according to claim 1, characterized in that the polyamide PA has a melting enthalpy of less than 7 J / g.
    [0003]
    3. Polymeric composition according to claim 1 or 2, characterized in that the polyamide PA is represented by the formula (1): PA XX.YY (1) in which XX represents a diamine and YY represents a diacid or by the formula ( 2): PA Z / XX.YY (2). in which Z represents a lactam L and / or an amino acid A, and XX represents a diamine and YY represents a dicarboxylic acid or by the formula (3b): PA VV.WW / XX.YY (3b) in which VV and XX represent a diamine and WW and YY represent a dicarboxylic acid or by the formula (4): PA Z / XX.YY / UU.TT (4) in which Z represents a lactam L and / or an amino acid A, XX and UU represent a diamine and YY and TT represent a dicarboxylic acid.4 Polymeric composition according to Claim 3, characterized in that the lactam L is chosen from γ-pyrrolidone, piperidinone, ε-caprolactam, enantholactam, caprylolactam, pelargolactam, decanolactam, undecanolactam and laurolactam and preferably laurolactam. 5. The polymeric composition as claimed in claim 3, characterized in that the aminocarboxylic acid A is chosen from 9-aminononanoic acid, 10-aminodecanoic acid, 12-aminododecanoic acid and 11-aminoundecanoic acid and its derivatives, especially N-heptyl-11-aminoundecanoic acid, and preferably from 12-aminododecanoic acid and 11-aminoundecanoic acid. 6. Polymeric composition according to any one of claims 3 to 5, characterized in that the diamine XX, VV and UU is selected from linear aliphatic diamines or not, or cycloaliphatic diamines or diamines with partially aromatic structures. 7. Polymeric composition according to any one of claims 3 to 5, characterized in that the diacid is chosen from aliphatic dicarboxylic acids or aromatic dicarboxylic acids or cycloaliphatic acids. 8. Polymeric composition according to any one of claims 1 to 7, characterized in that the polyamide PA comprises at least one second polymer. 9. Polymeric composition according to claim 8, characterized in that the second polymer may be chosen from a semi-crystalline polyamide, an amorphous polyamide, a semi-crystalline copolyamide, an amorphous copolyamide, a polyether-amide, a polyester-amide and their mixtures. 10. Polymeric composition according to any one of claims 1 to 9, characterized in that the multilayer polymer comprises a layer (A) comprising a polymer (A1) having a glass transition temperature below 0 ° C and a layer (B) comprising a polymer (B1) having a glass transition temperature of at least 60 ° C. 11. Polymeric composition according to claim 10, characterized in that the polymer (B1) having a glass transition temperature greater than 60 ° C is manufactured during the last step of the multi-step process forming the outer layer of the polymeric particle to multilayer structure. 12. Polymeric composition according to claim 10 or 11, characterized in that the polymer (A1) comprises at least 50% by weight of polymer units derived from isoprene or butadiene. 13. Polymeric composition according to any one of claims 10 to 12, characterized in that the polymer (B1) is a (meth) acrylic polymer. 14. Polymeric composition according to any one of claims 10 to 13, characterized in that the polymer (B1) comprises at least 70% by weight of monomers selected from (C1 to C12) alkyl (meth) acrylates and more preferably, the polymer (B1) comprises at least 80% by weight of C1 to C4 alkyl methacrylate monomers and / or C1 to C8 alkyl acrylate monomers. 15. Polymeric composition according to any one of claims 10 to 14, characterized in that the glass transition temperature Tg of the polymer (B1) is between 60 ° C and 150 ° C. 16. A process for producing a transparent polyamide-based polymer composition comprising the step of mixing a transparent polyamide PA and a multilayered polymer, characterized in that the composition satisfies the following formula: lk-11 wherein k is the mole percent content of aromatic groups in the polyamide PA, 1 is the mole percent content of aromatic monomers in the multilayered polymer, and the parameter t is at most 10. 17. Use of the polymeric composition according to any one of claims 1 to 15 or obtained by the process according to claim 16 as an injection molding compound for modified impact resistant transparent polyamide composition. 18. Article comprising a composition according to any one of claims 1 to 15 in at least one region or a layer. 19. Article according to claim 18, characterized in that the article is a molding, a sheet, a profile, a tube, a hollow body or an optically variable filter or an optical lens, preferably an ophthalmic lens, particularly preferred a spectral filter effect element, e.g. ex. in the form of a spectacle lens, a sunglass lens, a corrective lens, an optical filter, inspection lenses, sports glasses or ski goggles, visors, safety glasses, optical recording systems, flow meters, rupture discs, screens, optical data storage, housings or parts of housings, in particular for shaving apparatus, hair removal apparatus, measuring, or a window in buildings or in vehicles, or is a decorative element or a structural element, p. ex. in the form of a frame of spectacles or glasses, a toy, or in the form of a part of a sports shoe, or golf equipment, including a golf ball , or a cover, in particular in the form of a mobile phone case, a part of electronic equipment, storage media, infrared keys, transportable recordable devices, digital personal digital assistants, smartphones, a covering, in particular a packaging, decorative elements, or sports equipment, or a veneer, preferably in the automobile sector.
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    同族专利:
    公开号 | 公开日
    WO2016071409A1|2016-05-12|
    SG11201703400SA|2017-05-30|
    KR20170082561A|2017-07-14|
    BR112017008680A2|2018-01-30|
    CN107075250A|2017-08-18|
    FR3027908B1|2018-05-11|
    CN107075250B|2021-10-08|
    RU2017118846A|2018-12-05|
    EP3215568A1|2017-09-13|
    US20170306149A1|2017-10-26|
    JP2017533338A|2017-11-09|
    US10759939B2|2020-09-01|
    RU2017118846A3|2019-04-17|
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    法律状态:
    2015-10-08| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-06| PLSC| Publication of the preliminary search report|Effective date: 20160506 |
    2016-10-14| PLFP| Fee payment|Year of fee payment: 3 |
    2017-10-12| PLFP| Fee payment|Year of fee payment: 4 |
    2018-10-11| PLFP| Fee payment|Year of fee payment: 5 |
    2019-10-14| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-13| PLFP| Fee payment|Year of fee payment: 7 |
    2021-10-18| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460652|2014-11-04|
    FR1460652A|FR3027908B1|2014-11-04|2014-11-04|COMPOSITION BASED ON TRANSPARENT POLYAMIDE AND IMPACT RESISTANCE|FR1460652A| FR3027908B1|2014-11-04|2014-11-04|COMPOSITION BASED ON TRANSPARENT POLYAMIDE AND IMPACT RESISTANCE|
    CN201580060006.0A| CN107075250B|2014-11-04|2015-11-04|Impact-modified transparent polyamide polymer compositions|
    RU2017118846A| RU2017118846A3|2014-11-04|2015-11-04|
    JP2017542324A| JP2017533338A|2014-11-04|2015-11-04|Transparent polyamide polymer composition with improved impact resistance|
    US15/523,448| US10759939B2|2014-11-04|2015-11-04|Impact modified transparent polyamide polymer composition|
    SG11201703400SA| SG11201703400SA|2014-11-04|2015-11-04|Impact modified transparent polyamide polymer composition|
    EP15790547.2A| EP3215568A1|2014-11-04|2015-11-04|Impact modified transparent polyamide polymer composition|
    PCT/EP2015/075733| WO2016071409A1|2014-11-04|2015-11-04|Impact modified transparent polyamide polymer composition|
    KR1020177014955A| KR20170082561A|2014-11-04|2015-11-04|Impact modified transparent polyamide polymer composition|
    BR112017008680A| BR112017008680A2|2014-11-04|2015-11-04|impact modified polyamide transparent polymer composition|
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