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:
Jun. 17, 2014
Filed:
Apr. 27, 2012
Yutaka Hagiwara, Annaka, JP;
Minoru Igarashi, Annaka, JP;
Yutaka Hagiwara, Annaka, JP;
Minoru Igarashi, Annaka, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A method for producing a silicone rubber compound in a reduced blending time, and which imparts excellent resistance to plasticity reversion and the cured silicone rubber prepared without heat treatment has excellent resistance to compression set. (A) an organopolysiloxane with polymerization degree of at least 100 represented by the following average compositional formula (I):RSiO  (I)(R: a substituted or unsubstituted monovalent hydrocarbon group, a: 1.95 to 2.05), (B) a reinforcing silica having a specific surface area (BET) of at least 50 m/g, and (C) a preliminary hydrolysis product of (C-1) an alkoxysilane represented by the following formula (II):RSi(OR)  (II)(R: hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, R: a substituted or unsubstituted alkyl group, m: 0, 1, 2, or 3), and (C-2) water at a molar amount 0.3 to 5 times the alkoxy group in the alkoxysilane of component (C-1) are mixed and heated.