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:
Oct. 19, 1993
Filed:
Oct. 19, 1992
Applicant:
Inventors:
Takuya Ogawa, Kanagawa, JP;
Toshio Suzuki, Kanagawa, JP;
Assignee:
Dow Corning Japan, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 37 ; 528 14 ;
Abstract
The present invention is a method for the preparation of branched organopolysiloxane in which polysiloxane with the formula SiO.sub.2 constitutes the branching center or branch origin and the terminal on only one side of diorganopolysiloxane is bonded to the branch origin wherein this bonding is exactly to the branch origin. Specifically, the method for preparation of branched polyorganosiloxane comprises the reaction of an alkali metal compound with a silanol-containing polysiloxane described by formula