Patent ID: 8304467

Claim:
A polishing pad comprising a polishing layer consisting of a polyurethane resin foam having a fine cell structure, wherein the polyurethane resin foam has a tensile breaking extension of 25 to 120%, and wherein the polyurethane resin foam is a reaction cured body of an isocyanate-terminal prepolymer A containing a high-molecular-weight polyol A having a number average molecular weight of 500 to 850 and an isocyanate component, an isocyanate-terminal prepolymer B containing a high-molecular-weight polyol B having a number average molecular weight of 900 to 1500 and an isocyanate component, and a chain extender, an average NCO wt % of the isocyanate-terminal prepolymers A and B being in the range of 10-11% by weight and a content ratio of polyol A/polyol B being 36/64 to 70/30 (wt %).