Patent ID: 8545292
Filing Date: 2013-10-01
Classification: B24B,C08G

Abstract:
1. A two-component urethane resin composition for a polishing pad comprising a base resin containing an isocyanate group-terminated urethane prepolymer (A) and a curing agent containing an isocyanate group reactive compound (B); and characterized in that the urethane prepolymer (A) has an isocyanate group equivalent of 250 to 700 and is produced by reacting a polyisocyanate (a1) with an aromatic polyester polyol (a2) and a polyether polyol (a3) which are used as polyol components in combination at (a2)/(a3)=5/95 to 70/30 (mass ratio), and the aromatic polyester polyol (a2) has 4 to 8 aromatic rings in its molecular chain.