发明名称 |
Polishing pad and method for producing same |
摘要 |
A polishing pad has a polishing layer including 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 obtained by reacting a prepolymer raw material composition containing a diisocyanate, a high-molecular-weight polyol and a low-molecular-weight polyol; an isocyanate modified body polymerized by adding three or more diisocyanates; and a chain extender, and the addition amount of the isocyanate-modified body is 5 to 30 parts by weight with respect to 100 parts by weight of the isocyanate-terminated prepolymer. The polishing pad hardly causes scratches on the surface of an object to be polished and has an improved dressing property. |
申请公布号 |
US9079288(B2) |
申请公布日期 |
2015.07.14 |
申请号 |
US201013881336 |
申请日期 |
2010.10.26 |
申请人 |
TOYO TIRE & RUBBER CO., LTD. |
发明人 |
Nakai Yoshiyuki;Ogawa Kazuyuki;Nakamura Kenji |
分类号 |
B24B37/14;B24D11/00;B24B37/24;B24B37/04 |
主分类号 |
B24B37/14 |
代理机构 |
Law Office of Katsuhiro Arai |
代理人 |
Law Office of Katsuhiro Arai |
主权项 |
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 obtained by reacting a prepolymer raw material composition containing a diisocyanate, a high-molecular-weight polyol and a low-molecular-weight polyol; an isocyanate modified body polymerized by adding three or more diisocyanates; and a chain extender, and the addition amount of the isocyanate-modified body is 5 to 30 parts by weight with respect to 100 parts by weight of the isocyanate-terminated prepolymer, wherein a cut rate which is a dressed amount (μm) per minute of the polishing layer by dressing the polishing layer is 2 μm/minute or more. |
地址 |
Osaka-Shi JP |