| 摘要 |
Heat-stable adhesive compositions comprise solutions or dispersions of copolymers of (a) 0.5-30% of ethylenically unsaturated Mannich bases of a ,b -unsaturated amides, or acrylic, methacrylic or other vinyl or allyl compounds containing N-methylol, N-methylol ether, chlorhydrin, epoxy, ethylenimine, isocyanate, or carbonyl chloride groups, with (b) vinyl esters and/or butadiene, and/or esters of 4 or more C-atom alcohols with a ,b -unsaturated carboxylic acids, with or without (c) other ethylenically unsaturated compounds, cross-linking of adhesive coatings of the compositions being wholly or partly achieved by elevated temperature or by the addition of catalysts such as mineral acids, salts, bases, acid donors, amines or metal oxides or hydroxides. The Specification contains extensive lists of suitable monomer constituents of the adhesive polymers. Examples describe, (1-5) a 50% dispersion of a copolymer of (1) n-butyl acrylate and methylol methacrylamide, (2) ethyl hexylacrylate, vinyl chloride, acrylic acid and methylol methacrylamide plus 1 part of ammonium nitrate, (3) ethyl hexylacrylate, acrylonitrile, acrylic acid and methylol methacrylamide methyl ether plus 1 part of ammonium nitrate, (4) butyl acrylate, 3-chloro-1,2-propanediol acrylate-1 and acrylic acid plus caustic potash solution, (5) vinyl propionate and 3-chloro - 1,2 - propanediol - acrylate - 1, (7) an aqueous dispersion of n-butyl acrylate, vinyl acetate, acrylic acid and 3-chloro-1,2-propanediol acrylate-1 plus dilute caustic soda, (8) a 50% aqueous dispersion of a copolymer of methyl acrylate, butyl acrylate and 3-chloro-1,2-propanediol acrylate-1, (10) a 50% aqueous dispersion of a copolymer of ethyl hexyl acrylate, acrylonitrile, 3-chloro-1,2-propanediol acrylate-1, and acrylic acid having a pH of 3-4, (12) a 50% solution in benzene of a copolymer of n-butyl acrylate, and 3-chloro-1,2-propanediol acrylate-1 containing 0.8% of ethylene diamine. |
