Aqueous based release coating compositions

Claim 2

An aqueous based release coating composition comprising an emulsion copolymer or interpolymer which contains an amine or acid functional group and a release agent which is capable of reacting and forming a bond with the emulsion copolymer or interpolymer such that, once the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 3

A composition as claimed in claim 1, wherein the emulsion copolymer or interpolymer comprises the reaction product of a non-functional copolymerizable monomer and a functional copolymerizable monomer which contains an amine or acid functional group.

Claim 4

A composition as claimed in claim 2 wherein the acid is an alpha-unsaturated mono- or dicarboxylic acid derivative or a mixture thereof; the amine is an aminoacrylate; and the release agent is a fatty amine, fatty diamine, amine functional silicone, blocked isocyanate, polydimethyl siloxane polymer or a fatty epoxide.

Claim 5

An aqueous based release coating composition comprising an emulsion copolymer or interpolymer which is capable of bonding to a release agent by an amine-acid bonding interaction such that., once the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 6

An aqueous based release coating composition comprising an emulsion copolymer or interpolymer which is capable of bonding to a release agent by an amine-acid bonding interaction such that., once the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 7

An aqueous based release coating composition comprising an emulsion copolymer or interpotymer of an acid monomer containing an acid functional group and a non--functional copolymerizable monomer, and a release agent containing an amine functional group which is capable of reacting and forming a bond with the acid functional group of the emulsion copolymer or interpolymer such that, once the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 8

An aqueous based release coating composition comprising an emulsion copolymer or interpotymer of an acid monomer containing an acid functional group and a non--functional copolymerizable monomer, and a release agent containing an amine functional group which is capable of reacting and forming a bond with the acid functional group of the emulsion copolymer or interpolymer such that, once the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 9

A composition as claimed in claim 5 wherein the emulsion copolymer or interpolymer comprises 0.2-20% parts by weight of the acid monomer and 80-99.8% parts by weight of the non-functional copolymerizable monomer and the amount of release agent in the composition is not in excess of the amount which is required to react with the functional groups of the emulsion copolymer or interpolymer.

Claim 10

A composition as claimed in claim 5 br claim 6 wherein the non-functional copolymerizable monomer is vinyl acetate, vinyl chloride, vinylidene chloride, styrene, an alkyl acrylate or a mixture of two or more thereof.

Claim 11

A composition as claimed in any one of claims 5 to 7 wherein the acid monomer is selected from: a) wherein R is hydrogen or a lower alkyl group C n H 2n+1 and n is an integer of from 1 to 4 b) wherein m is 0 or an integer of 1 to 2 c) wherein n is an integer of from 1 to 3 d) wherein n is an integer of from 1 to 3 e) f) wherein R is hydrogen or a lower alkyl group C n H 2n+1 and n is an integer of from 1 to 4 and R is an alkylene group or g) 2-butenoic acid, maleic acid or fumaric acid.

Claim 12

A composition as claimed in any one of claims 5 to 8 wherein the release agent is selected from: a) wnerein n is an integer of from 8 to 20 and R is a lower alkyl, hydrogen or (CH 2 CR'HO) m H wherein m is an integer of from 1 to 15 and R' is hydrogen or a methyl group. D) or wherein n is an integer of from 10 to 20, m is 2 or 3 and R is hydrogen, lower alkyl or polyalkoxy of the formula wherein R is hydrogen or methyl and p is an integer of from 1 to 15. c) wherein x and y are integers. d) wherein R is hydrogen or a lower alkyl group and n is an integer of from 10 to 100. 55 e) wherein the product is derived from a fatty isocyanate (C n H 2n+1 NCO) and a blocking agent ROH such as a phenol or a ketoxime, and n is an integer of from 10 to 20. f) wherein n is an integer of from 8 to 18.

Claim 13

1 0. A composition as claimed in any one of claims 5 to 9 wherein the emulsion copolymer or interpolymer contains 80-99.8% parts iy weight vinyl acetate and 0.2 to 20% parts polyethoxylated (10) tallow aminopropylamine.

Claim 14

A composition as claimed in any one of claims 5 to 9 wherein the emulsion copolymer or interpolymer contains 80-99.8% parts by weight vinyl acetate and 0.2 to 20% parts by weight fumaric acid or 2-acrylamido-2--methylpropane sulfonic acid and the release agent is an amino-functional emulsion.

Claim 15

An aqueous based release coating composition comprising an emulsion copolymer or interpolymer of a reactive amine-functional compound and a non-functional copolymerizable monomer and a release agent possessing an acid functional group which is capable of reacting with and bonding with the emulsion by means of an amine-acid bonding interaction such that, one the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 16

An aqueous based release coating composition comprising an emulsion copolymer or interpolymer of a reactive amine-functional compound and a non-functional copolymerizable monomer and a release agent possessing an acid functional group which is capable of reacting with and bonding with the emulsion by means of an amine-acid bonding interaction such that, one the bond is formed, the release agent is prevented from migrating and contaminating an adhesive surface.

Claim 17

A composition as claimed in claim 12 wherein the reactive amine-functional compound is an aminoacrylate and the release agent is a fatty acid.

Claim 18

A process for the preparation of release coating compositions comprising the steps of: a) polymerizing an acid monomer and a non-functional copolymerizable monomer to form an emulsion copolymer or interpolymer containing a reactive functional group capable of making up part of an amine-acid bonding interaction; b) mixing the emulsion with a release agent capable of forming an amine-acid bonding interaction with the functional group; c) mixing until homogeneity is achieved; d) drying and/or curing the resultant composition.

Claim 19

A process for the preparation of release coating compositions comprising the steps of: a) polymerizing an acid monomer and a non-functional copolymerizable monomer to form an emulsion copolymer or interpolymer containing a reactive functional group capable of making up part of an amine-acid bonding interaction; b) mixing the emulsion with a release agent capable of forming an amine-acid bonding interaction with the functional group; c) mixing until homogeneity is achieved; d) drying and/or curing the resultant composition.