Patent ID: 9644106
Date: 2017-05-09
CPC Classifications: C08F,C08K,C08L,C09B,C09D

Claim:
1. An aqueous emulsion solution comprising: a polymer I; a water-insoluble polymer II; and water, wherein the polymer I and the polymer II are dispersed together in the water and form an emulsion in a manner as the polymer II is incorporated in a particle of the polymer I, the polymer I is an A-B block copolymer formed from 90 mass % or more of a methacrylate-based monomer and satisfying following (1) and (2) and (3): (1) a polymer block A is substantially water-insoluble and has number average molecular weight in a range from 1000 to 10000 and a polydispersity index in a range of 1.5 or less; (2) a polymer block B is synthesized using, as a polymer block-forming component, a monomer comprising methacrylic acid and has an acid value from 30 to 250 mgKOH/g; and (3) the A-B block copolymer comprising the polymer blocks A and B has number average molecular weight in a range from 5000 to 20000, a content of the polymer block A in a range from 5 to 60 mass % in the A-B block copolymer, and a polydispersity index in a range of 1.6 or less, the A-B block copolymer as the polymer I is present as a water-insoluble particle having the polymer II incorporated therein, the polymer II is a polymer formed from a monomer comprising a hydrophobic addition polymerizable monomer and has a glass transition temperature of 70° C. or lower, the polymer II as a hydrophobic addition polymer, is incorporated in the A-B block copolymer dispersed in an aqueous solution, wherein the A-B block copolymer is neutralized with an alkali so that the hydrophobic addition polymerizable monomer forms the polymer II incorporated in the polymer I by radical polymerization, and a mass ratio of the polymer I to the polymer II is in a range from 5:95 to 80:20.