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:
Apr. 05, 2005
Filed:
Jan. 21, 2003
Hiromi Nishiwaki, Niigata-ken, JP;
Ayumu Kiyomori, Niigata-ken, JP;
Tohru Kubota, Niigata-ken, JP;
Shin-Etsu Chemical, Co., Ltd., Tokyo, JP;
Abstract
A compound having a non-silanol hydroxyl group and a compound having a silanol group are subjected to dehydrative condensation in the presence of a compound of formula (1), (2) or (3):MX  (1)ZSiRRR  (2)CFSOY  (3)wherein M is a metal, n is the valence of metal M, and X is halogen or CFSO; a=1 to 4, b, c and d=0 to 3, a+b+c+d=4, R, Rand Rare monovalent hydrocarbon groups, Z is halogen or CFSO; Y is H or HW, W is an amine NRRRor a nitrogen-containing heterocyclic compound, R, Rand Rare H or monovalent hydrocarbyl groups, and m=0 to 10. The method is effective in silylating the hydroxyl group without generating a substantial amount of harmful by-products such as hydrogen chloride or triethylamine hydrochloride.