Patent ID: 8628852

Claim:
Core-shell resin particles (C2) each comprising a film shell layer (P) in one or more layer structure made of a resin (a) containing polyurethane resin and a core layer (Q) in one layer structure made of a resin (b), wherein the weight ratio of the shell layer (P) and the core layer (Q) is in a range of (0.1:99.9) to (70:30), the content of volatile components of the resin particles (C2) is 2% by weight or lower, and the content of a vinyl resin in the resin (b) is 30% by weight or lower, wherein said polyurethane resin is an addition polymerized product of a polyisocyanate, a diol and a polyester polyol, or an amino-containing polyurethane resin which is a product of reacting the terminal isocyanate groups of the prepolymers of a polyisocyanate, a diol and a polyester polyol with primary and/or secondary monoamines, and wherein the resin (b) consists of polyester resins which are condensation polymers of 1,2-propylene glycol with polycarboxylic acids, their anhydrides, or their lower alkyl esters, or metal salts of these condensation polymers.