Acoustically active plastisols
First Claim
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1. In a method of reducing sound emission and mechanical vibration in a metal plate, the improvement comprising;
- applying to the metal plate a sprayable plastisol composition comprising a powder-form organic polymer and a plasticizer for the organic polymer and gelling the pastisol composition, wherein said plastisol composition comprises;
a) 5 to 60% by weight of at least one powder-form polymer selected from the group consisting of i) copolymers consisting essentially of styrene residues and 2 to 20% by weight of the polymer of residues of an olenfinically unsaturated carboxylic acid coupling monomer, ii) copolymers consisting essentially of styrene, 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid coupling monomer, and 0.2 to 5% by weight of residues of an olefinically unsaturated crosslinking comonomer having a functional group which is not a carboxyl group and which does not react during the radical polymerization, iii) alkyl methacrylate homopolymers, iv) copolymers consisting essentially of alkyl methacrylate residues and from 0.5% to 4% by weight of residues of an olefinically unsaturated coupling or crosslinking comonomer having a functional group which does not react during the radical polymerization, v) copolymers of alkyl methacrylate and methyl methacrylate, vi) copolymers consisting essentially of alkyl methacrylate residues, methyl methacrylate residues, and from 0.5% to 4% by weight of residues of an olefinically unsaturated coupling or crosslinking comonomer having a functional group which does not react during the radical polymerization, and vii) mixtures of at least two of said homopolymers and copolymers of groups i) to vi);
b) 5 to 65% by weight of plasticizers;
c) 0 to 40% by weight of fillers; and
d) 2 to 40% by weight of reactive additives.
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Abstract
The invention relates to acoustically active sprayable plastisol compositions based on styrene copolymers and/or alkyl methacrylate homopolymers and/or copolymers of methyl methacrylate which, in addition to the favorable abrasion properties and corrosion-preventing properties of the plastisols, have a good vibration-damping effect and distinctly reduce the noise caused by particle impact (chippings, water, sand).
25 Citations
22 Claims
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1. In a method of reducing sound emission and mechanical vibration in a metal plate, the improvement comprising;
- applying to the metal plate a sprayable plastisol composition comprising a powder-form organic polymer and a plasticizer for the organic polymer and gelling the pastisol composition, wherein said plastisol composition comprises;
a) 5 to 60% by weight of at least one powder-form polymer selected from the group consisting of i) copolymers consisting essentially of styrene residues and 2 to 20% by weight of the polymer of residues of an olenfinically unsaturated carboxylic acid coupling monomer, ii) copolymers consisting essentially of styrene, 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid coupling monomer, and 0.2 to 5% by weight of residues of an olefinically unsaturated crosslinking comonomer having a functional group which is not a carboxyl group and which does not react during the radical polymerization, iii) alkyl methacrylate homopolymers, iv) copolymers consisting essentially of alkyl methacrylate residues and from 0.5% to 4% by weight of residues of an olefinically unsaturated coupling or crosslinking comonomer having a functional group which does not react during the radical polymerization, v) copolymers of alkyl methacrylate and methyl methacrylate, vi) copolymers consisting essentially of alkyl methacrylate residues, methyl methacrylate residues, and from 0.5% to 4% by weight of residues of an olefinically unsaturated coupling or crosslinking comonomer having a functional group which does not react during the radical polymerization, and vii) mixtures of at least two of said homopolymers and copolymers of groups i) to vi); b) 5 to 65% by weight of plasticizers; c) 0 to 40% by weight of fillers; and d) 2 to 40% by weight of reactive additives. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- applying to the metal plate a sprayable plastisol composition comprising a powder-form organic polymer and a plasticizer for the organic polymer and gelling the pastisol composition, wherein said plastisol composition comprises;
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11. In a method of reducing sound emission and mechanical vibration in automotive vehicles, the improvement comprising applying to a rigid substrete of the automotive vehicle a sprayable plastisol composition comprising powder-form organic polymers and plasticizers, wherein said plastisol composition is comprised of:
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a) 5 to 60% by weight of at least one powder-form polymer selected from the group consisting of i) copolymers consisting essentially of styrene residues end 2 to 20% by weight of the copolymer of residues of an olefinically unsaturated carboxylic acid selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, and mixtures thereof, ii) copolymers consisting essentially of styrene residues, 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, and mixtures of two or more thereof, and 0.2 to 5% by weight of residues of an olefinically unsaturated crosslinking comonomer having a functional group which is not a carboxyl group and which does not react during the radical polymerization, iii) C2-8 alkyl methacrylate homopolymers, iv) copolymers consisting essentially of C28 alkyl methacrylate residues and from 0.5% to 4% by weight of residues a coupling or crosslinking comonomer selected from the group consisting of N-vinyl imidazole, acrylic acid, methacrylic acid, and itaconic acid, v) copolymers of a C2-8 alkyl methacrylate and methyl methacrylate, vi) copolymers consisting essentially of C2-8 alkyl methacrylate residues, methyl methacrylate residues, and from 0.5% to 4% by weight of a coupling or crosslinking comonomer selected from the group consisting of N-vinyl imidazole, acrylic acid, end methacrylic acid, and vii) mixtures of at least two of said homopolymers and copolymers of groups i) to vi); b) 5 to 65% by weight of plasticizers; c) 0 to 40% by weight of fillers; d) 2 to 40% by weight of reactive additives;
ende) a blowing agent selected from the group consisting of azo compounds, N-nitroso compounds, sulfonyl hydrazides or sulfonyl semicarbazides and gelling the plastisol composition.
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12. In a method of reducing sound emission and mechanical vibration in automotive vehicles comprising metal, the improvement comprising filling the cavities of the vehicle with a sprayable plastisol composition comprising powder-form organic polymers end plasticizers, wherein said plastisol composition is comprised of:
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a) 5 to 60% by weight of at least one powder-form polymer selected from the group consisting of i) copolymers comprised of styrene residues and 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid, ii) copolymers comprised of styrene residues, 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid, and 0.2 to 5% by weight of residues of crosslinking comonomer having olefinic unsaturation and having a functional group which is not a carboxyl group end which does not react during radical polymerization, iii) alkyl methacrylate homopolymers, iv) copolymers of an alkyl methacrylate and from 0.5% to 4% by weight of a coupling or cross-linking comonomer, v) copolymers of an alkyl methacrylate and methyl methacrylate, vi) copolymers of an alkyl methacrylate, methyl methacrylate, and from 0.5% to 4% by weight of a coupling or crosslinking comonomer, and vii) mixtures of at least two of said homopolymers and copolymers of groups i) to vi); b) 5 to 65% by weight of plasticizers; c) 0 to 40% by weight of fillers; and d) 2 to 40% by weight of reactive additives; and
celling the plastisol composition. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. In a method of reducing sound emission and mechanical vibration in automotive vehicles, the improvement comprising applying to a cavity of a motor vehicle a sprayable plastisol composition comprising a powder-form organic polymer and a plasticizer, wherein said plastisol composition is comprised of;
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a) 5 to 60% by weight of at least one powder-form polymer selected from the group consisting of i) copolymers comprised of styrene residues and 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, and mixtures of two or more thereof, ii) copolymers comprised of styrene residues, 2 to 20% by weight of residues of an olefinically unsaturated carboxylic acid selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, and mixtures of two or more thereof, and 0.2 to 5% by weight of residues of another crosslinking comonomer, iii) C2-8 alkyl methacrylate homopolymers, iv) copolymers of a C28 alkyl methacrylate and from 0.5% to 4% by weight of a coupling or crosslinking comonomer selected from the group consisting of N-vinyl imidazole, acrylic acid, methacrylic acid, and itaconic acid, v) copolymers of a C2-8 alkyl methacrylate and methyl methacrylate, vi) copolymers of a C28 alkyl methacrylate, methyl methacrylate, and from 0.5% to 4% by weight of a coupling or crosslinking comonomer selected from the group consisting of N-vinyl imidazole, acrylic acid, and methacrylic acid, and vii) mixtures of at least two of said homopolymers and copolymers of groups i) to vi); b) 5 to 65% by weight of plasticizers; c) 0 to 40% by weight of fillers; d) 2 to 40% by weight of reactive additives; and e) a blowing agent selected from the group consisting of azo compounds, N-nitroso compounds, sulfonyl hydrazides or sulfonyl semicarbazides.
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Specification