Patent ID: 7691940
Filing Date: 2010-04-06
Classification: C08G,C08J

Abstract:
1. An aqueous polyurethane resin comprising a plurality of polyurethane resins obtained by reacting macropolyol, an alicyclic diisocyanate, a compound having an active hydrogen group having an anionic group, and a chain extender, wherein each of the polyurethane resins contains the macropolyol which is different from one another, and each of the polyurethane resins is chemically bonded partially to one another through the chain extender, wherein at least one polyurethane resin out of the plurality of polyurethane resins contains at least one kind of hydrophobic macropolyol selected from the group consisting of polyesterpolyol, polycarbonatepolyol, and polyoxypolyalkylenepolyol whose alkylene group has 3-10 carbons, and in the plurality of polyurethane resins, the polyurethane resin which is different from the polyurethane resin containing the hydrophobic macropolyol has a hydrophilic macropolyol having 50% by weight or more of polyoxyethylene groups, and wherein the chain extender comprises a hydrophobic chain extender and a hydrophilic chain extender.