Patent ID: 9132524
Filing Date: 2015-09-15
Classification: B24B,H01L

Abstract:
1. A polishing pad having a polishing layer comprising a non-foamed polyurethane, wherein the non-foamed polyurethane is a reaction cured body of a polyurethane raw material composition containing: an isocyanate-terminated prepolymer A obtained by reacting a prepolymer A raw material composition containing a diisocyanate, a high-molecular-weight polyol (a) and a low-molecular-weight polyol; an isocyanate-terminated prepolymer B obtained by reacting a prepolymer B raw material composition containing an isocyanate-modified body polymerized by adding three or more diisocyanates and a high-molecular-weight polyol (b); and a chain extender; and the addition amount of the isocyanate-terminated prepolymer B is 5 to 30 parts by weight with respect to 100 parts by weight of the isocyanate-terminated prepolymer A.