Water-borne low adhesion backsize and release coating compositions, methods of making the compositions, and sheet materials coated therewith

Claim 1

A method of preparing a coated sheet material comprising the steps of: a) forming a mixture comprising the following: (1) about 5 to about 70 weight percent of a melted free radically polymerizable free radically polymerizable long-chain monomer of the formula C.sub.n H.sub.2n+1 --P--C.sub.m H.sub.2m --X--CR.sup.1 ═CH.sub.2 wherein n is an integer of about 12 to about 20; Y is a divalent polar linking group selected from the group consisting of ##STR8## X is a divalent linking group selected from the group consisting of ##STR9## m is an integer of about 2 to about 10; and R 1 is selected from the group consisting of --H and --CH 3 ; (2) about 30 to about 95 weight percent of deionized water; and (3) about 0.05 to about 4 weight percent of an emulsifier; b) homogenizing the mixture in order to form an emulsion; c) adding to said emulsion about 0.01 to about 1 weight percent of a free radical initiator capable of initiating free radical polymerization of said monomer upon being subjected to a means of initiation; d) initiating free-radical polymerization by subjecting said emulsion to a means of initiation while agitating said emulsion under inert atmospheric conditions; e) sustaining said free-radical polymerization until a polymer-containing latex is produced; f) diluting said latex to at least about 2 weight percent solids by combining said latex with an aqueous phase; g) coating said diluted latex onto at least a portion of one major surface of a flexible sheet; and h) evaporating said aqueous phase in order to form a coated sheet material comprising said flexible sheet coated with said polymer.

Claim 2

A method of preparing a coated sheet material comprising the steps of: a) forming a mixture comprising the following: (1) about 5 to about 70 weight percent of a melted free radically polymerizable free radically polymerizable long-chain monomer of the formula C.sub.n H.sub.2n+1 --P--C.sub.m H.sub.2m --X--CR.sup.1 ═CH.sub.2 wherein n is an integer of about 12 to about 20; Y is a divalent polar linking group selected from the group consisting of ##STR8## X is a divalent linking group selected from the group consisting of ##STR9## m is an integer of about 2 to about 10; and R 1 is selected from the group consisting of --H and --CH 3 ; (2) about 30 to about 95 weight percent of deionized water; and (3) about 0.05 to about 4 weight percent of an emulsifier; b) homogenizing the mixture in order to form an emulsion; c) adding to said emulsion about 0.01 to about 1 weight percent of a free radical initiator capable of initiating free radical polymerization of said monomer upon being subjected to a means of initiation; d) initiating free-radical polymerization by subjecting said emulsion to a means of initiation while agitating said emulsion under inert atmospheric conditions; e) sustaining said free-radical polymerization until a polymer-containing latex is produced; f) diluting said latex to at least about 2 weight percent solids by combining said latex with an aqueous phase; g) coating said diluted latex onto at least a portion of one major surface of a flexible sheet; and h) evaporating said aqueous phase in order to form a coated sheet material comprising said flexible sheet coated with said polymer.