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:
May. 27, 2004
Yasufumi Kubota, Niigata-ken, JP;
Tohru Kubota, Niigata-ken, JP;
Satoshi Onai, Gunma-ken, JP;
Koji Sakuta, Gunma-ken, JP;
Akira Yamamoto, Gunma-ken, JP;
Yasufumi Kubota, Niigata-ken, JP;
Tohru Kubota, Niigata-ken, JP;
Satoshi Onai, Gunma-ken, JP;
Koji Sakuta, Gunma-ken, JP;
Akira Yamamoto, Gunma-ken, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A branched tetrasiloxane is prepared by preforming a liquid mixture of a disiloxane compound, an alcohol and an acid catalyst, adding a trialkoxysilane compound to the mixture for reaction, and adding water to the reaction mixture for co-hydrolysis, thereby forming a branched tetrasiloxane. The method is capable of preparing a branched tetrasiloxane, especially methyltris(trimethylsiloxy)silane having a sufficiently high purity to use as cosmetic oil in good yields.