Crosslinkable carpet-back coating with hydroxy-functionalized vinyl acetate emulsion polymers
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsDavid J. Lunsford, John C. Leighton
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Abstract
A carpet back coating composition which is an aqueous emulsion polymerization product of ethylene, vinyl acetate, and a ethylenically unsaturated hydroxy-functional monomer to form an emulsion copolymer which is combined with a crosslinking agent selected from the group consisting of multifunctional aziridine, multifunctional isocyanate, and multifunctional epoxide. Carpets prepared with the carpet back coating compositions exhibit improved wet strength. The improvement in wet strength is achieved by means of crosslinking reactions which do not generate volatile organic compounds as by-products.
Claims7
A crosslinkable carpet back coating composition comprising:
- a) copolymer, consisting of an aqueous emulsion polymerization product of:
- (a) from about 4 to about 25 weight percent of ethylene;
- (b) from about 67 to about 95 weight percent of vinyl acetate;
- and
- (c) from about 0.1 to about 8 weight percent of at least one ethylenically unsaturated hydroxy-functional monomer,
- wherein the weight percents of monomers used to prepare the copolymer are based on the weight of (a)+(b)+(c);
- and
- b) from about 0.5 to about 9 weight percent, based on the weight of the copolymer, of a crosslinking agent selected from the group consisting of multifunctional aziridine, multifunctional isocyanate, and multifunctional epoxide, wherein the crosslinking reaction does not generate volatile organic compounds as by-products.
A crosslinkable carpet back coating composition comprising:
- a) copolymer, consisting of an aqueous emulsion polymerization product of:
- (a) from about 10 to about 20 weight percent of ethylene;
- (b) from about 75 to about 90 weight percent of vinyl acetate;
- and
- (c) from about 1 to about 5 weight percent of a ethylenically unsaturated hydroxy-functional monomer having the formula
- wherein R1 is hydrogen or methyl and R2 is a hydroxy alkyl group having from 2 to 6 carbon atoms, and the weight percents of monomers used to prepare the copolymer are based on the weight of (a)+(b)+(c);
- and
- b) from about 1.5 to about 7 weight percent, based on the weight of the copolymer, of a crosslinking agent selected from the group consisting of multifunctional aziridine, multifunctional isocyanate, and multifunctional epoxide, wherein the crosslinking reaction does not generate volatile organic compounds as by-products.
Dependencies are inferred from the claim text.