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:
Nov. 06, 2001
Filed:
Mar. 30, 2000
Tetsuo Nakanishi, Gunma-ken, JP;
Ichiro Ono, Gunma-ken, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a method for the preparation of an organopolysiloxane-grafted graft copolymer of a carbon-carbon backbone chain structure which is free from the troubles due to emission of an irritative odour and instability in storage. The method comprises the steps of copolymerizing a (meth)acryloxyalkyl-terminated organopolysiloxane compound with (meth)acrylic acid or an alkyl (meth)acrylate, optionally, together with a long chain-alkyl (meth)acrylate and/or a (meth)acryloxy-terminated polyoxyalkylene compound in a solution polymerization process to give a polymer solution and subjecting the polymer solution to a catalytic hydrogenation treatment so as to completely eliminate any unpolymerized acrylic compounds.