• 专利附录
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    • 专利摘要:
    1353091 Polyamide articles DYNAMIT NOBEL AG 2 July 1971 [4 July 1970] 31193/71 Heading C3R [Also in Division F2] A piston for a shock absorber (in which a piston fixed to a rod is displaceable in a cylinder and guided in a damping fluid so that the cylinder is divided into two chambers of varying volume) is formed, e.g. moulded or extruded as a transparent or coloured article, of an amorphous polyamide containing residues of aliphatic straight or branched chained or cycloaliphatic diamines, aromatic diamines or aliphatic lactams and residues of aliphatic or aromatic dicarboxylic acids, the polyamide having a viscosity number, measured according to DIN 53727 in a 0À5% by weight solution in m-cresol at 25‹ C., of 100-200 ml.g.<SP>-1</SP>. The polyamide may comprise acidic residues derived from terephthalic acid and the diamine residues derived from 2,2,4 - trimethlyhexamethylenediamine, 2,4,4 - trimethylhexamethylenediamine, 1,7 - diamino - 4,4 - dimethyloctane, hexamethylenediamine or mixtures of these. The terephthalic acid residues may be derived from dimethylterephthalate. The acidic residues may be derived from isophthalic or naphthalenedicarboxylic acid. The polyamide may comprise acidic residues derived from adipic or sebacic acid and residues derived from hexamethylenediamine, p,p<SP>1</SP> - diaminocyclohexylpropane or -methane or from caprolactam. Diamine components for the preparation of the polyamide may also be nona-, deca- and dodecamethylenediamine, alkyl substituted diamines such as 2-methyl-4-ethylhexamethylenediamine, 2,2,5,5 - tetramethylhexamethylenediamine, 3 - isopropylhexamethylenediamine, 3 - isooctylhexamethylenediamine, 3 - isododecylhexamethylenediamine and 2,4 - diethyloctamethylenediamine; cyclic diamines such as 2 - aminomethyl - 3,5,5 - trimethylcyclohexylamine; and aromatic diamines such as phenylenediamine and xylylenediamine. Diamines of the formula may be used, wherein R<SP>1</SP> is hydrogen or an alkyl group having 1-4 carbon atoms. R<SP>2</SP> is an optically alkyl-substituted alkylene group having 1-10 carbon atoms in the chain or an optionally alkyl-substituted phenylene group, and R<SP>3</SP> is an alkyl group having 1-4 carbon atoms. Examples are given. A concentrated aqueous solution of the diamine salt with the acid can be polycondensed in the melt with heating, pressure and then low pressure. Instead of the pressure stage there can be precondensation of the salt in high-boiling solvents and then vacuum applied. Alternatively dicarboxylic acids or their lower alkyl esters can be reacted with equimolar quantities of diamine in the presence of water and polycondensed. Instead of alkyl esters, diarylesters of the acids may be used without water. Before moulding, the polyamide is heated for 8-16 hours under reduced nitrogen pressure. Specifications 1,328,523 and 1,049,987 are referred to.
    公开号:SU867286A3
    申请号:SU802917847
    申请日:1980-05-12
    公开日:1981-09-23
    发明作者:Шнейдер Иоганнес；Пунгс Вольфганг
    申请人:Динамит Нобель Аг (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD FOR PROCESSING AMORPHOUS POLYAMIDE (9B
    The invention relates to the manufacture of plastic products from amorphous polyamides used in the automotive industry .5
    A known method of processing amorphous polyamides based on terephthalic acid and alkyl substituted hexamethylenediamine into articles, which work in tension and compression in heavy solids, used, in particular, in the automotive industry by pressure casting 1.
    A disadvantage of the known method is the possibility of forming 5-sections on the product surface, which excludes the processing of amorphous polyamides into pistons of shock absorbers.
    The closest to the proposed technical essence is the method of processing amorphous polyamides based on terephthalic acid or its dimethyl ester and 1,7-diamino-4,4-dimethyl octane and / or a mixture of 2,2,4-trimethylhexamethylene diene-25 mine with 2,4,4-trimethylhexamethylenediamine, having an o coefficient of viscosity of 100–200, which includes the steps of forming the product at elevated temperature under pressure, cooling and thermal
    processing. In this heat treatment, the molded article is subjected to heat treatment for 10 days in vacuum, followed by aging at 100-150 ° C in engine oil, in carbon dioxide atmosphere, in a jet of water vapor or in a molten salt of sodium nitrate, potassium nitrite and sodium bicarbonate or 110 ° C for 12 hours, followed by aging in heated oil at 160-220 ° C for 7-360 minutes, followed by cooling the products to room temperature. The resulting products have improved physical and mechanical properties 2.
    The disadvantage of this method is the formation of thin sections on the surface of products such as porin shock absorbers, which eliminates the practical use of pistons.
    The purpose of the invention is to prevent the formation of thin sections on the surface of the product without deteriorating its mechanical properties.
    This goal is achieved in that according to the method of processing amorphous polyamides based on terephthalic acid or its dimethyl ester and 1,7-diamino-4,4-dimethyl octane and / or a mixture of 2,2,4-trimethylhexamethylenediamine with 2,4,4- trimethyl hexamethylenediamine, having a viscosity ratio of 100-200, including the steps of forming a product at a high temperature under pressure, cooling and heat treatment, is heat treated before forming the product at IIO-ISO C and a pressure of 50-700 mm Hg, in an inert atmosphere gas, for 8-16 hours
    These conditions of heat treatment and its conduct before molding allow completely eliminate the formation of thin sections on the surface of products, in particular, the shock absorber pistons, with some improvement in their mechanical properties.
    Example, B00 g of granulated amorphous polyamide based on equivalent - amounts of terephthalic acid dimethyl ester and a mixture of 2,2,4-trimethylhexamethylenediamine. With 2,4,4-trimethylhexamethylenediamine in a ratio of 60:40, having a viscosity coefficient of 140 (in 0 , 5% by weight of a solution of M-cresol at 25 ° C}, is subjected to heat treatment at IIOC in a vacuum of 200 mmHg, under nitrogen for 16 hours and then fed to an olive molding machine, in which the raw materials are processed ari 260 -265C and a pressure of 200 kgf / cm for 40 s. Get a transparent piston and ortizatora 30 cm high and 10 cm wide, that the air is cooled to room temperature. The surface of the piston damper completely smooth, thin sections thereon was observed.
    EXAMPLE 2 Example 1 is repeated with the difference that amorphous polyamide based on equivalent amounts of terephthalic acid and a mixture of 2,2,4-trimethylhexamethylenediamine and 2,4,4-trimethylhexamethylenediamine is used in a ratio of 40:60 having a viscosity coefficient of 145. A transparent shock absorber piston is obtained with a height of -30 cm and a width of 10 cm. The surface of the shock absorber piston is completely smooth, no polishing on it is observed.
    EXAMPLE 3 Example 1 is repeated with the difference that amorphous polyamide based on equivalent amounts of terephthalic acid and 1.7: -diamino-4, 4-dimethyloctane, having a viscosity coefficient of 100, is heat-treated. at 150 ° C and a pressure of 500 mm Hg. This process is carried out at 280-285 ° C and a pressure of 300 kgf / cm. Get a transparent piston shock absorber specified in example 1 of the size, the surface of which is completely smooth.
    EXAMPLE 4 Example 1 is repeated, with the difference that the heat treatment of the raw material is carried out at and under pressure.
    50 mmHg Art., in a nitrogen atmosphere for 10 hours. Receive. a transparent piston of the shock absorber specified in example 1 dimensions, the surface of which is completely smooth.
    J Example5. Example 3 is repeated with the difference that the heat treatment is carried out at a pressure of 700 mm Hg. century, in nitrogen atmosphere for 10 h. Get transparent
    .. the piston of the shock absorber of sizes specified in size 1, the surface of which is completely smooth.
    Example Example 3 is repeated with the difference that amorphous polyamide based on equivalents is used.
    5 quantities of terephthalic acid, 1,7-diamino-4, 4-dimethyloctane and a mixture: 2,2,4-trimethylhexamethylenediamine with 2,4,4-trimethylhexamethylenediamine in the ratio of 60:40, having a viscosity factor of 150. Viscosity is 150. the shock absorber piston is specified in example 1, the surface of which is completely smooth. Comparative
    5 experience. Example 1 is repeated with the difference that the heat treatment is carried out after molding and carried out at a pressure of 700 mm Hg. Art. for 10 days followed by exposure
    Q for 4 hours in engine oil, after which the product is air cooled to room temperature. On. The surfaces of the piston of the Armotizatoro are polished.
    Comparative Example 2. Example 1 is repeated with the difference that the heat treatment is carried out after molding and is carried out at atmospheric pressure for 12 hours, followed by drying at
    0 for 6 h in engine oil, after which the product is cooled in air to room temperature. On on. the surfaces of the piston of the shock absorber are observed thin sections.
    5 Comparative
    Review 3. Repeat Comparative Test 2, with the difference that the amorphous polyamide of Example 3 is used. More thin sections are observed on the surface of the shock absorber piston.
    Comparative Test 4. Repeat example 1 with the difference that the heat treatment before molding is carried out at a pressure of 200 mm Hg. Art., in nitrogen atmosphere for 7h. On the surface of the piston of the shock absorber there are more .. thin sections
    Comparative report. Example 1 is repeated, with the difference that the heat treatment is carried out at 110 ° C and a pressure of 200 mmHg. Art., in a nitrogen atmosphere for 17 hours. A transparent e piston absorber is obtained.
    Comparative review 6. Repeat example 3 with the difference that thermal processing is carried out at a pressure of 200 mmHg. Art., in nitrogen atmosphere for 8 h. Get a transparent por. Strength limit, kgf / cm during bending
    when stretched
    Hardness when pressing the ball, kgf / cm
    Heat resistance
    Martens, with
    A shock absorber, on the surface of which no thin sections are observed.
    In tab. 1 and 2 shows the mechanical properties of the piston of the shock absorber according to examples and comparative experiments, respectively.
    Table 1
    1G25
    1330 1120 1315 865 897 862 890
    1443 1431 1435
    105
    105
    109
    Table 2
    权利要求:
    Claims (1)
    [1]
    Claim
    A method of processing amorphous poly * amides based on terephthalic acid i or its complex dimethyl ether 55 and 1,7-diamino-4,4-dimethyloctane and / or a mixture of 2,2,4-trimethylhexamethylenediamine with 2,4,4-trimethylhexamethylenediamine having a coefficient viscosity 100-200, including the stages of product formation at elevated temperature under pressure, cooling and heat treatment, excellent. ayuVNIIIPI Order 8111/84, with the fact that, in order to prevent the formation of thin sections on the surface of the product without impairing its mechanical properties, heat treatment is carried out until the product is molded at 110-150 ° C and a pressure of 50- / 00 mm RT. Art. g in an inert gas atmosphere for 8-16 hours
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    同族专利:
    公开号 | 公开日
    BE768983A|1971-12-24|
    US3846379A|1974-11-05|
    GB1353091A|1974-05-15|
    DE2033193B2|1975-10-02|
    JPS5412594B1|1979-05-24|
    AT305797B|1973-03-12|
    ES392876A1|1974-07-16|
    DE2033193A1|1972-03-02|
    SE368021B|1974-06-17|
    NL7108318A|1972-01-06|
    FR2100215A5|1972-03-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2130948A|1937-04-09|1938-09-20|Du Pont|Synthetic fiber|
    US2516585A|1948-12-21|1950-07-25|Du Pont|Synthetic linear polyamides containing intralinear cyclic groups and process for obtaining same|
    US2585163A|1950-03-25|1952-02-12|Du Pont|Synthetic linear polyamides|
    US2600843A|1952-01-24|1952-06-17|Vibradamp Corp|Process for manufacturing compressible glass fiber shock absorption material and products|
    NL264738A|1959-10-29|
    NL264981A|1961-05-08|
    US3198771A|1961-06-30|1965-08-03|Grace W R & Co|Amorphous polyamides from aromatic dicarboxylic acids and an ethyl substituted alkylene diamine|
    NL296609A|1962-08-14|
    IL24111A|1964-08-24|1969-02-27|Du Pont|Linear polyamides|
    DE1495393B2|1964-11-12|1979-10-18|Dynamit Nobel Ag, 5210 Troisdorf|Process for the production of polyamides from methyl esters of tere- and / or isophthalic acid and aliphatic primary diamines|
    BE683232A|1965-07-01|1966-12-27|
    US3416302A|1967-01-10|1968-12-17|Du Pont|Differential shrinkage yarn|
    BE756343A|1969-09-18|1971-03-01|Dynamit Nobel Ag|PARTICULARLY SUITABLE POLYAMIDES FOR MOLDING MATERIALS|US3932362A|1968-10-28|1976-01-13|Dynamit Nobel Aktiengesellschaft|Amorphous polyamide of C-alkyl substituted diamine and terephthalic acid dialkyl ester having improved electrical creep resistance|
    CH631191A5|1977-10-28|1982-07-30|Ciba Geigy Ag|METHOD FOR PRODUCING NEW TRANSPARENT POLYAMIDES.|
    CH631189A5|1977-10-28|1982-07-30|Ciba Geigy Ag|METHOD FOR PRODUCING NEW TRANSPARENT ALIPHATIC POLYAMIDES.|
    US4476280A|1983-02-16|1984-10-09|Standard Oil Company|Polyamide compositions from mixtures of trimethylhexamethylene diamine, hexamethylene diamine and diacids|
    CA1207940A|1983-02-16|1986-07-15|Wassily Poppe|Crystalline copolyamides from terephthalic acid andhexamethylenediamine andtrimethylhexamethylenediamine|
    US4495328A|1983-02-16|1985-01-22|Standard Oil Company |Crystalline copolyamides from terephthalic acid and hexamethylenediamine and trimethylhexamethylenediamine|
    US4567249A|1983-11-18|1986-01-28|General Electric Company|Melt preparation of polyamide by amide ester interchange|
    DE3513839A1|1985-04-17|1986-10-23|Fritz Bauer + Söhne oHG, 8503 Altdorf|FLUID FILLED PUMP CYLINDER UNIT|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19702033193|DE2033193C3|1970-07-04|Polyamides for shock absorber pistons|
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