Curable latex composition, films and foams formed therefrom and method for curing the composition
First Claim
1. A curable latex composition comprising(a) a carboxylated latex comprising a copolymer of a vinyl aromatic monomer, a diene monomer and an ethylenically unsaturated carboxylic acid monomer,(b) an epoxy resin emulsion comprising an epoxy resin having more than one 1,2-epoxy group, said emulsion additionally comprising a first catalyst selected from the group consisting of ethyltriphenyl phosphonium acetate, ethyltriphenyh phosphonium phosphate, methyltrioctyl ammonium chloride, alkybenzyl dimethyl ammonium chloride, benzyl trimethyl ammonium chloride, tetraethyl ammonium bromide, N-dodecyl pyridinium chloride and tetrabutyl ammonium iodine and(c) a second catalyst selected from the group consisting of tridimethylaminomethyl phenol, dimethyl aminomethyl phenol, dicyandiamide, ethylenediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine and isophorone diamine.
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Accused Products
Abstract
This invention relates to a curable latex composition, films and foams produced therefrom and method for preparing said curable latex composition. The composition comprises a carboxylated latex, an epoxy resin emulsion containing an organo-soluble or organo-miscible catalyst and a water-soluble catalytic curing agent. The carboxylated latex comprises a copolymer of from 0 to 75 percent by weight of a vinyl aromatic monomer, from 0 to 85 percent by weight of a diene monomer and from 0.5 to 25 percent by weight of an ethylentically unsaturated carboxylic acid monomer, all weight percentages based on the total weight of the copolymer. The latex is produced by emulsion polymerization of one or more monomers in an aqueous environment. The various components of the curable latex composition may be maintained separately until shortly before use because of their ambient temperature curing properties. In some instances two or more components which do not react with each other can be premixed. The present curable latex composition has improved shelf life, cures fast at relatively low temperature and provides plastic films or foams with improved moisture resistance and other physical properties. This composition is suitable for use as latex foam backing of textiles, textile and lamination adhesive and synthetic carpet grass coating.
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Citations
17 Claims
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1. A curable latex composition comprising
(a) a carboxylated latex comprising a copolymer of a vinyl aromatic monomer, a diene monomer and an ethylenically unsaturated carboxylic acid monomer, (b) an epoxy resin emulsion comprising an epoxy resin having more than one 1,2-epoxy group, said emulsion additionally comprising a first catalyst selected from the group consisting of ethyltriphenyl phosphonium acetate, ethyltriphenyh phosphonium phosphate, methyltrioctyl ammonium chloride, alkybenzyl dimethyl ammonium chloride, benzyl trimethyl ammonium chloride, tetraethyl ammonium bromide, N-dodecyl pyridinium chloride and tetrabutyl ammonium iodine and (c) a second catalyst selected from the group consisting of tridimethylaminomethyl phenol, dimethyl aminomethyl phenol, dicyandiamide, ethylenediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine and isophorone diamine.
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16. A process for preparing a curable latex composition which comprises (a) blending a carboxylated latex comprising a copolymer of a vinyl aromatic monomer, a diene monomer and an ethylenically unsaturated carboxylic acid monomer, (b) an epoxy resin emulsion comprising an epoxy resin having more than one 1,2-epoxy group, said emulsion additionally comprising a first catalyst selected from the group consisting of ethyltriphenyl phosphonium, acetate, ethyltriphenyl phosphonium phosphate, methyltrioctyl ammonium chloride, alkylbenzyl dimethyl ammonium chloride, benzyl trimethyl ammonium chloride, tetraethyl ammonium bromide, N-dodecyl pyridinium chloride and tetrabutyl ammonium iodide and (c) a second catalyst selected from the group consisting of tridimethylaminomethyl phenol, dimethyl aminomethyl phenol, dicyandiamide, ethylenediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine and isophorone diamine.
Specification