Patents Assigned to Too Tire & Rubber Co., Ltd.
  • Publication number: 20090047872
    Abstract: To provide a polishing pad which is insusceptible to clogging of groove with abrasive particles and grinding dusts during polishing, and leads to little decrease in polishing rate even after long-term continuous use. A polishing pad of the present invention has a polishing layer formed of polyurethane resin foam having fine-cells, and asperity structure formed in a polishing surface of the polishing layer, and is featured in that the polyurethane resin foam is a reaction cured product between isocyanate-terminated prepolymer containing high-molecular-weight polyol component and isocyanate component, and a chain extender, and contains a silicon-based surfactant having combustion residue of not less than 8 wt %.
    Type: Application
    Filed: January 9, 2007
    Publication date: February 19, 2009
    Applicant: Too Tire & Rubber Co., Ltd.
    Inventors: Takeshi Fukuda, Junji Hirose, Masato Doura