Patent ID: 7041754

Claim:
An emulsion type modifier for improving properties of a pressure-sensitive emulsion acrylic adhesive, the emulsion type modifier prepared by polymerizing an emulsion consisting of: (a) 15 to 35 parts per hundred of monomers of a C6–C12 diester of a dicarboxylic acid, wherein the C6–C12 diester of the dicarboxylic acid contain 6 to 12 carbon atoms in each alkyl group of the diester; (b) 15 to 35 parts per hundred of monomers of a C2–C16 vinyl ester; (c) 35 to 65 parts per hundred of monomers of a C4–C8 alkyl acrylate; (d) 0.1 to 2.0 parts per hundred of monomers containing an acetoacetoxy functional group; (e) 0.1 to 2.0 parts per hundred of a nonionic surfactant; (f) 0.4 to 3.0 parts per hundred of an anionic surfactant; and (g) 60 to 70 parts per hundred of de-ionized water; wherein a total weight of (a)+(b)+(c) is 100 parts, while (d), (e), (f) and (g) are added based on the total weight of (a)+(b)+(c).