The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1999
Filed:
Oct. 03, 1997
Applicant:
Inventors:
Noriyoshi Ogawa, Osaka, JP;
Jun Tajima, Osaka, JP;
Mitsuhiro Takarada, Gunma, JP;
Masaki Tanaka, Gunma, JP;
Assignees:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525464 ; 528 28 ; 528 30 ; 528196 ;
Abstract
A polycarbonate polymer and resin composition having excellent transparency and abrasion resistance, comprising a mixture of (i) a polycarbonate polymer having a repeating unit having a specific grafted polysiloxane structure, and (ii) from 0 to 20 wt % of a diorganopolysiloxane. The polycarbonate polymer is obtained by reacting (a) a specific polysiloxane compound and (b) a specific bisphenol compound with (c) a carbonate ester forming compound.