Epoxide crosslinkable latices

Claim 1

An aqueous dispersion of a polymer and a curing system having a good pot life and being curable on heating at a temperature from 75 to 150°C for times from 5 to 30 minutes comprising per 100 parts by dry weight of an aqueous dispersion of one or more polymeric solids selected from the group consisting of: (A) polymers comprising: (i) 20 to 80 weight percent of one or more C₈₋₁₂ vinyl or vinylidene aromatic monomers which may be unsubstituted or substituted by a chlorine atom or a C₁₋₄ alkyl radical; (ii) from 80 to 20 weight percent of one or more C₄₋₆ aliphatic conjugated diolefins which are unsubstituted or substituted by a chlorine atom; (iii) from 0.5 to 15 weight percent of C₃₋₆ one or more ethylenically unsaturated carboxylic acids or anhydrides; and (iv) optionally up to 10 weight percent of one or more monomers selected from the group consisting of: (a) C₃₋₆ ethylenically unsaturated aldehydes; (b) amides of C₃₋₆ ethylenically unsaturated carboxylic acids, which amides may be unsubstituted or substituted at the nitrogen atom by up to two radicals selected from the group consisting of C₁₋₄ alkyl and hydroxyalkyl radicals; and (c) C₁₋₈ alkyl and hydroxyalkyl esters of C₃₋₆ ethylenically unsaturated carboxylic acids. (B) polymers comprising: (i) 20-45 weight percent of a C₃₋₈ alkenyl nitrile; (ii) from 80 to 55 weight percent of one or more C₄₋₆ aliphatic conjugated diolefins which are unsubstituted or substituted by a chlorine atom; and (iii) from 0.5 to 15 weight percent of C₃₋₆ ethylenically unsaturated carboxylic acids or anhydrides (C) polymers comprising: (i) at least 75 weight percent of a mixture comprising: (a) 100 to 50 weight percent of one or more monomers selected from the group consisting of C₁₋₈ alkyl and hydroxyl alkyl esters of C₃₋₆ ethylenically unsaturated carboxylic acids and C₂₋₈ alkenyl and hydroxy alkenyl esters of C₁₋₈ saturated carboxylic acids; (b) up to 50 weight percent of one or more C₈₋₁₂ vinyl or vinylidene aromatic monomers which may be unsubstituted or substituted by a chlorine atom or a C₁₋₄ alkyl radical; (ii) from 0.5 to 25 weight percent of one or more C₃₋₆ ethylenically unsaturated carboxylic acids or anhydrides; (iii) optionally up to 10 weight percent of one or more monomers selected from the group consisting of: (a) C₃₋₆ ethylenically unsaturated aldehydes; (b) amides of C₃₋₆ ethylenically unsaturated carboxylic acids, which amides may be unsubstituted or substituted at the nitrogen atom by up to two radicals selected from the group consisting of C₁₋₄ alkyl and hydroxyalkyl radicals; and (D) polymers comprising: (i) from 5 to 40 weight percent of a C₂₋₃ olefin; (ii) from 95 to 60 weight percent of one or more monomers selected from the group consisting of C₁₋₈ alkyl and hydroxyalkyl esters of C₃₋₆ ethylenically unsaturated carboxylic acids and C₂₋₈ alkenyl and hydroxy alkenyl esters of C₁₋₈ saturated carboxylic acids; (iii) from 0.5 to 15 weight percent of C₃₋₆ ethylenically unsaturated carboxylic acids or anhydrides; and (iv) optionally up to 10 weight percent of one or more monomers selected from the group consisting of: (a) C₃₋₆ ethylenically unsaturated aldehydes; (b) amides of C₃₋₆ ethylenically unsaturated carboxylic acids, which amides may be unsubstituted or substituted at the nitrogen atom by up to two radicals selected from the group consisting of C₁₋₄ alkyl and hydroxyalkyl radicals; and (E) polymers comprising: (i) at least 75 weight percent of one or more monomers selected from the group consisting of vinyl chloride and vinylidene chloride; and (ii) up to 20 weight percent of one or more monomers selected from the group consisting of C₁₋₈ alkyl and hydroxyalkyl esters of C₃₋₆ ethylenically carboxylic acid; (iii) from 0.5 to 25 weight percent of one or more C₃₋₆ ethylenically unsaturated carboxylic acids or anhydrides; and (iv) optionally up to 10 weight percent of one or more monomers selected from the group consisting of: (a) C₃₋₆ ethylenically unsaturated aldehydes; (b) amides of C₃₋₆ ethylenically unsaturated carboxylic acids, which amides may be unsubstituted or substituted at the nitrogen atom by up to two radicals selected from the group consisting of C₁₋₄ alkyl and hydroxyalkyl radicals; and up to 10 parts by weight per 100 parts by weight of said polymer of one or more epoxy compounds which is a polyhydric alcohol esters of non-terminal epoxides of C₁₂₋₂₅ fats or oils containing at least two epoxy groups per ester chain.