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:
Sep. 19, 1978
Filed:
Jan. 24, 1978
Applicant:
Inventors:
Assignees:
Kawaken Fine Chemicals Co., Ltd., Tokyo, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2604 / ;
Abstract
A novel and effective method for the synthetic preparation of dialkylchlorosilanes as an important intermediate in the silicone industry is provided, which is based on the selectivity of a specific combination of a reaction solvent and a reducing agent in the dechlorination-reduction of one of the two silicon-bonded chlorine atoms present in a dialkyldichlorosilane to convert the Si-Cl linkages to Si-H. The reaction solvent used is either N,N'-dimethylimidazolidinone or N,N,N',N',N',N'-hexamethyl-phosphoric triamide, while the reducing agent is sodium borohydride, optionally in combination with sodium hydride.