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. 14, 2003
Filed:
Aug. 15, 2002
Akihito Tsukuno, Annaka, JP;
Hiroyuki Kobayashi, Annaka, JP;
Yukinori Satoh, Annaka, JP;
Hideaki Ozeki, Annaka, JP;
Yoshihiro Shirota, Tokyo, JP;
Susumu Ueno, Takefu, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A diorganodichlorosilane is prepared by subjecting organochlorosilanes to disproportionation reaction in the co-presence of a SiH group-containing compound and in the presence of a primary catalyst of AlCl or AlBr and a co-catalyst of Mg, Al, Ca, Ti, Fe, Ni, Cu, Zn or Sn or a compound thereof. The invention enables disproportionation reaction of organochlorosilanes under atmospheric pressure and at a low temperature at which no substantial sublimation of AlCl or the like occurs, thus allowing the reaction equipment to be simple and improving the safety of reaction.