• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a gypsum-based plate, in particular of the type comprising a gypsum-based core disposed between two sheets of paper or nonwoven, wherein said core contains at least one polymer chosen from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature ranging from -10 to + 25 ° C, vinyl acetate terpolymers, an olefin and a a vinyl ester monomer; and copolymers of vinyl acetate and an acrylic monomer. It also relates to a method of manufacturing said plate, the use of said polymer to improve the acoustic performance of said plate and the aforementioned gypsum-based composition.
    公开号:FR3018220A1
    申请号:FR1451884
    申请日:2014-03-07
    公开日:2015-09-11
    发明作者:Katarzyna Chuda；Caroline Demathieu-Roeltgen；Veronique Chopin；Carl Riddle；Jeremy Simons
    申请人:Saint Gobain Placo SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to a plaster based plate with acoustic properties. Such a plate can be used in particular for the realization of a wall facing, ceiling or floor, and a partition wall. Plaster-based plates are generally composite plates comprising a plaster core disposed between two layers of paper or nonwoven made of glass fibers or a polymer. These plates have mechanical properties that meet the standards in force, in particular good resistance to flexing under load. Plaster-based plates as such do not exhibit particular acoustic performance. When it is desired to improve these performances, it is known to associate with said plate a sound insulating material such as a glass or rock wool or a polymer, to form a composite product which can be held in place by means of profiles. , glue, screws or dowels depending on the intended use. The most common gypsum boards have an average thickness of 12.5 mm and are generally marketed under the name "BA 13". These plates have a surface density of the order of 9 kg / m 2. It is certainly well known that the acoustic performance of a plate can be improved by increasing its surface density, for example up to 12 kg / m 2, without modifying its thickness, but this necessarily results in an increase in the quantity plaster in the plate. As a result, the cost of the plate is higher. The installation of a plate of higher mass density also has drawbacks: because of the increase of the weight, the handling of the plate is more difficult and this being more dense it is more difficult to fix it to the using screws. These disadvantages become major when the plate must be fixed in height (partition or ceiling).
    [0002] The object of the present invention is to provide a gypsum board having improved acoustical properties while maintaining good mechanical properties. In particular, it is sought to obtain a gypsum based plate whose acoustic properties are at least equivalent to those of a conventional plate of the same thickness but higher surface density, of the order of 12 kg / m 2. The weight per unit area more particularly targeted by the invention varies from 4 to 11 kg / m 2, preferably of the order of 9 kg / m 2. This object is achieved according to the invention thanks to the plaster-based plate, in particular of the type comprising a core based on plaster placed between two sheets of paper or nonwoven, characterized in that said core encloses at least one polymer. More specifically, the core of the plate comprises plaster and at least one polymer chosen from vinyl polybutyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature which varies from -10 to + 25 ° C, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer. The polyvinyl butyral according to the invention advantageously has a glass transition temperature which varies from 40 to 100 ° C., preferably 50 to 90 ° C. and better still 60 and 80 ° C., measured by differential scanning calorimetry according to the ISO standard. 11357-1: 2009. The preferred polyvinyl butyral is in the form of a powder consisting of particles having a size of between 20 and 1000 μm, especially 50 to 100 μm, 150 to 400 μm or 400 to 1000 μm. The copolymers of vinyl acetate and an olefin in accordance with the invention are, for example, copolymers of vinyl acetate and of at least one monomer chosen from ethylene, propylene, butylene and isobutylene. The glass transition temperature of these copolymers preferably ranges from -5 to + 20 ° C and advantageously from 0 to + 10 ° C. The glass transition temperature of the copolymers is measured by differential scanning calorimetry according to ISO 11357-1: 2009. Copolymers of vinyl acetate and ethylene (EVA) are preferred.
    [0003] The terpolymers of vinyl acetate, an olefin and a vinyl ester monomer are, for example, terpolymers of vinyl acetate, an olefin as defined in the preceding paragraph and acrylate or methacrylate. alkyl. Copolymers of vinyl acetate and an acrylic monomer are, for example, copolymers of vinyl acetate and of alkyl acrylate or methacrylate. The polymer generally represents 1 to 40% by weight of the mixture consisting of plaster and polymer, preferably 3 to 30% and advantageously 5 to 20%. The polymer according to the invention is advantageously in the form of particles having a mean size which varies from 0.01 to 1200 μm, preferably 0.1 to 1000 μm, and more preferably from 0.2 to 400 μm. The core of the plate according to the invention may further contain additives which improve the physicochemical properties of the final product and make it possible to obtain good conditions of application. The core can thus comprise the following additives in the following proportions by weight, expressed in parts per 100 parts by weight of plaster: 0.1 to 15 parts of a bonding agent whose function is to increase the adhesion paper coating with the plaster, for example a starch, in particular pretreated with an acid, a dextrin or a vegetable meal, in particular wheat or corn, - 0.001 to 10 parts of a setting accelerator, for example sulphate of hydrated calcium or potassium sulphate, - 0.001 to 10 parts of a retarding agent, - 0 to 10 parts of a biocide, for example sodium omadine, - 0.0001 to 1 part of a foaming agent which Its role is to create pores to reduce the density of the final product. By way of example, mention may be made of sodium alkyl ether sulphate and sodium lauryl sulphate, 0 to 10 parts of at least one water-repellent agent, for example a siloxane or a polysiloxane, 0 to 20 parts of at least an anti-fire agent, for example vermiculite, silica, especially of micrometric size, a clay or metal fibers, 0 to 20 parts of at least one reinforcing agent, for example polymer fibers, mineral fibers , especially glass, and animal or vegetable fibers. Another object of the invention relates to a method of manufacturing the gypsum board, in particular of the type comprising a core disposed between two layers of paper or nonwoven which has just been described. The method is characterized in that, for producing the core of the plate, at least one polymer chosen from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a temperature of glass transition, ranging from -10 to + 25 ° C, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer is added to calcined gypsum. The manufacture of plaster based plates is known per se. Plasterboard is formed by a continuous process of mixing calcined calcined gypsum (calcium sulfate hemihydrate) with water to form a paste that is continuously deposited between two sheets of paper or non-paper. woven fabric containing mineral fibers, especially glass, or polymer fibers. The formed product is pressed to obtain the desired thickness, and is then conveyed continuously on a conveyor over a distance allowing the dough to reach a level of hardening sufficient to be able to be cut into plates of determined length. The plates are then dried in an oven to remove excess water. Conventionally, calcium sulphate hemihydrate (CaSO4.0.5H2O calcined gypsum), whether natural or synthetic, that is to say derived from the desulphurization of gases from thermal power plants, undergoes a reaction. hydration in the presence of water and is converted into calcium sulfate dihydrate (CaSO4.2 H2O: gypsum). The amount of calcined gypsum used to form the dough generally varies from 50 to 150 parts by weight per 100 parts by weight of water and preferably from 60 to 120 parts. The polymer may be in the form of an aqueous solution or dispersion, a powder or pellets. In the case of a solution or dispersion, it is added to the water used to prepare the dough. When it comes to powder or pellets, the addition is made with calcined gypsum before it is mixed with water to form the paste. Dispersions and powders are preferred. Although the thickness of the particularly targeted plasterboard plate is equal to 12.5 mm, it can not be excluded a lower thickness, especially up to 6 millimeters, or greater, especially up to 25 millimeters. The gypsum board according to the invention can be used as such or in combination with another material, for example a mineral or wood wool, or a polymer to form an acoustic and / or thermal panel, or a film interlayer polymer providing the connection between two plaster-based plates to form composite panel. This plate can be used to form wall claddings, false ceilings, floors and partition walls. Another subject of the invention relates to the use of a polymer chosen from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature which varies from 10 to + 25 ° C, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer in a gypsum-based composition calcined for the manufacture of a plasterboard to improve the acoustic performance of said plate. The composition suitable for the manufacture of the gypsum board described above is also an object of the present invention. This plaster-based composition comprises calcined gypsum and at least one polymer chosen from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature which varies from 10 to + 25 ° C, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer. The composition may be used in particular for producing joints. The following examples illustrate the invention without limiting it.
    [0004] EXAMPLES 1 A11 Gypsum-based plates were prepared from the compositions given in Table 1. In a mixer, calcium sulfate hemihydrate, the polymer and water were introduced. The mixture is stirred for 15 seconds at 600 rpm and 45 seconds at 1850 rpm. The foaming agent is then added and the mixture is stirred at 250 rpm for 50 seconds to obtain a paste. The paste is poured into a brass mold with 4 parallelepipedic cavities (length: 300 mm, width: 30 mm, depth: 13 mm) whose internal walls have been previously coated with a layer of oil. The samples are demolded after 20 minutes, then left in the open air for 40 minutes and finally dried in an oven at 40 ° C until their weight remains constant. For comparison, two non-polymer-weight plates having a basis weight of 9.0 and 11.9 kg / m 2 were prepared under the same conditions (Comparative Examples 10 and 11). The acoustic performance of the plates is evaluated by measuring their mechanical impedance MIM ("Measurement of Mechanical Impedance") under the conditions of ISO 16940: 2008 (E). From the curve of the acceleration frequency (dB) as a function of the frequency (Hz), the dynamic Young's modulus (in GN / m2) and the loss factor (in%) are calculated. The samples are strips 300 mm long, 30 mm wide and 13 mm thick. In Table 1 are the values of the Young's modulus, the loss factor and the acoustic gain calculated with respect to the reference plates of Comparative Examples 10 and 11. Table 1 Recycled gypsum, paperless CP1 marketed by Saint-Gobain Placo Millifoam® C sold by Huntsman; solids content: 30% Shark Powder® C2 marketed by Shark; solids content: 100% Shark Pellets® C3 sold by Shark; solids content: 100% Shark Dispersion® C3 sold by Shark; solids content: 50% Vinnapas 5044 N marketed by Wacker Chemie: solids content: 100% Vinnapas® 7055 E marketed by Wacker Chemie: solids content: 100% Emultex® VV 665 E marketed by the company Synthomer company: solids content: 50% Emultex® VV 675 E sold by the company Synthomer: solids content: 50% d. : not determined Ex.
    [0005] 9 Ex.
    [0006] 10 Comp. Ex.
    [0007] 11 Comp. Ex.
    [0008] 1 Ex.
    [0009] 2 Ex.
    [0010] 3 Ex.
    [0011] 4 Ex.
    [0012] Ex.
    [0013] 6 Ex.
    [0014] 7 Ex.
    [0015] 8 Composition Calcined gypsum (') (g) Water (g) Foam (2) (g) Polymer (g) - Aqueous dispersion - Powder - Pellets 800 750 47 1000 750 40 1000 750 13 200 (3) Properties Weight per unit area (kg) / m2) Dynamic Young's modulus (GN / m2) Loss factor (%) Acoustic gain (%) - relative to Ex. 10 - relative to Ex. 11 9.3 1.80 1.86 38.3 52, 1 9.1 1.82 2.3 37.7 51.5 9.1 1.52 2.61 47.9 59.5 9.0 1.99 3.8 31.8 47.0 10.2 1 , 74 1.76 40.4 53.7 9.0 1.55 6.5 46.9 58.7 9.0 1.59 7.69 45.5 57.7 9.0 2.92 0.5 11.9 3.76 0.5 800 750 47 200 (4) 1000 800 0 200 (5) 800 750 30 200 (6) 900 750 35 100 (6) 900 750 30 200 (7) 1000 650 30 200 (8) ) 1000 700 30 100 (8) 1000 650 30 200 (9) 9.1 2.19 3.47 25 41.7 9.2 2.13 2.59 27 38.5 (1) (2) (3) (4) (5) (6) (7) (8) (9) n.
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. Plate based on plaster, in particular of the type comprising a core based on plaster placed between two sheets of paper or nonwoven, characterized in that said core contains at least one polymer chosen from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature which varies from -10 to + 25 ° C, vinyl acetate terpolymers, an olefin and a monomer of vinyl ester, and copolymers of vinyl acetate and an acrylic monomer.
    [0002]
    2. Plate according to claim 1, characterized in that the copolymers of vinyl acetate and an olefin have a glass transition temperature which varies from -5 to + 20 ° C, preferably from 0 to + 10 ° C .
    [0003]
    3. Plate according to claim 1 or 2, characterized in that the polymer represents 1 to 40% by weight of the mixture consisting of plaster and the polymer, preferably 3 to 30%, preferably 5 to 20%.
    [0004]
    4. Plate according to one of claims 1 to 3, characterized in that the polymer is in the form of particles having an average size which ranges from 0.01 to 1200 pm, preferably from 0.1 to 1000 pm, and more preferably 0.2 to 400 μm.
    [0005]
    5. Plate according to one of claims 1 to 4, characterized in that it further comprises the following additives in the following proportions by weight, expressed per 100 parts by weight of plaster: - 0.1 to 15 parts of a adhesion promoter, for example a starch, in particular pretreated with an acid, a dextrin or a vegetable meal, - 0.001 to 10 parts of a setting accelerator, for example calcium sulphate hydrate or potassium sulphate, 0.001 to 10 parts of a setting retarder, 0 to 10 parts of a biocide, for example sodium omadine, 0.0001 to 1 part of a foaming agent, for example sodium alkyl ether sulphate and lauryl sulphate sodium, 0 to 10 parts of at least one water-repellent agent, for example a siloxane or a polysiloxane, 0 to 20 parts of at least one anti-fire agent, for example vermiculite, silica, a clay or metal fibers, 0 to 20 parts of at least one reinforcing agent, for example fibers s of polymer, mineral fibers or animal or vegetable fibers.
    [0006]
    6. A method of manufacturing a plate, in particular of the type comprising a core disposed between two sheets of paper or nonwoven, in which calcined calcined gypsum is mixed with water to form a paste, the dough continuously between said sheets, the formed product is pressed to obtain the desired thickness, the plates are cut to the desired length, characterized in that to achieve the core of the plate is added to the calcined gypsum at least one selected polymer vinyl polybutyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature ranging from -10 to + 25 ° C, vinyl acetate terpolymers, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer.
    [0007]
    7. Use of a polymer chosen from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a glass transition temperature which varies from -10 to + 25 ° C, the terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer in a calcined gypsum composition for the manufacture of a plaster based plate for improving the acoustic performance of said plate.
    [0008]
    8. Composition based on plaster characterized in that it comprises calcined gypsum and at least one polymer selected from polyvinyl butyral (PVB), copolymers of vinyl acetate and an olefin, which copolymers have a temperature of glass transition from -10 to + 25 ° C, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and copolymers of vinyl acetate and an acrylic monomer .
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    法律状态:
    2015-03-04| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-22| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-24| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-22| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-25| PLFP| Fee payment|Year of fee payment: 7 |
    2021-03-31| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451884A|FR3018220B1|2014-03-07|2014-03-07|PLASTER-BASED ACOUSTIC PLATE.|FR1451884A| FR3018220B1|2014-03-07|2014-03-07|PLASTER-BASED ACOUSTIC PLATE.|
    PCT/FR2015/050550| WO2015132536A2|2014-03-07|2015-03-06|Acoustic panel made of plaster|
    SG11201607428TA| SG11201607428TA|2014-03-07|2015-03-06|Acoustic panel made of plaster|
    CN201580012488.2A| CN106068355A|2014-03-07|2015-03-06|The baffle that Gypsum Fibrosum is made|
    US15/123,919| US9868269B2|2014-03-07|2015-03-06|Acoustic panel made of plaster|
    CA2941325A| CA2941325C|2014-03-07|2015-03-06|Acoustic panel made of plaster|
    KR1020167024318A| KR101888288B1|2014-03-07|2015-03-06|Acoustic panel made of plaster|
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    JP2016572923A| JP6560262B2|2014-03-07|2015-03-06|Plaster acoustic panel|
    EP15714578.0A| EP3113945A2|2014-03-07|2015-03-06|Acoustic panel made of plaster|
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    TW104107211A| TWI668351B|2014-03-07|2015-03-06|Plaster-based acoustic board|
    ARP150100693A| AR099696A1|2014-03-07|2015-03-06|PLASTER BASED ACOUSTIC PLATE|
    MYPI2016703243A| MY178317A|2014-03-07|2015-03-06|Acoustic panel made of plaster|
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    CL2016002244A| CL2016002244A1|2014-03-07|2016-09-06|Acoustic plasterboard comprising a gypsum core, and wherein said core contains at least one polyvinyl butyral polymer, copolymers of vinyl acetate and an olefin, copolymers with tg of -10 ° C to +25 ° C, acetate terpolymers of vinyl, an olefin and a vinyl ester monomer, among others.|
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