Patent ID: 8309466
Filing Date: 2012-11-13
Classification: B24B,B24D,C08G,Y10T

Abstract:
1. A polishing pad having a polishing layer consisting of a polyurethane foam having cells with an average cell diameter of 70 μm or less, wherein a high-molecular-weight polyol component that is a starting component of the polyurethane foam contains a hydrophobic high-molecular-weight polyol A having a number-average molecular weight of 550 to 800 and a hydrophobic high-molecular-weight polyol B having a number-average molecular weight of 950 to 1300 in an A/B ratio of from 10/90 to 50/50 by weight, the polyurethane foam of the polishing layer being a cured product produced by reacting, with a chain extender, an isocyanate-terminated prepolymer A containing the polyol A and an isocyanate component, and an isocyanate-terminated prepolymer B containing the polyol B and an isocyanate component.