Patent ID: 8939818
Filing Date: 2015-01-27
Classification: B24B,C08G,H01L

Abstract:
1. A polishing pad having a polishing layer, the polishing layer comprising a product of curing reaction of a polyurethane-forming raw material composition containing: an isocyanate-terminated prepolymer (A) obtained by reaction of a prepolymer-forming raw material composition (a) containing an isocyanate component and a polyester-based polyol; an isocyanate-terminated prepolymer (B) obtained by reaction of a prepolymer-forming raw material composition (b) containing an isocyanate component and a polyether-based polyol; and a chain extender, wherein the product of curing reaction has a phase-separated structure, wherein an amount of the isocyanate-terminated prepolymer (A) is from 15 to 570 parts by weight based on 100 parts by weight of the isocyanate-terminated prepolymer (B).