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:
Feb. 27, 2018
Filed:
Feb. 21, 2014
Dow Corning Toray Co., Ltd., Tokyo, JP;
Dow Corning Corporation, Midland, MI (US);
Stanton James Dent, Midland, MI (US);
Tomohiro Iimura, Ichihara, JP;
Yusuke Miyamoto, Tokyo, JP;
Yoshitsugu Morita, Ichihara, JP;
Fumito Nishida, Midland, MI (US);
Emil Radkov, Midland, MI (US);
Jacob William Steinbrecher, Midland, MI (US);
Hiroaki Yoshida, Ichihara, JP;
Makoto Yoshitake, Ichihara, JP;
DOW CORNING TORAY CO. LTD., Chiyoda-ku, Tokyo, JP;
DOW CORNING CORPORATION, Midland, MI (US);
Abstract
This invention relates to a curable silicone composition comprising: (A) a straight-chain organopolysiloxane having at least two alkenyl groups in a molecule; (B) an organopolysiloxane represented by the following average unit formula: (RSiO)(RSiO)(RSiO)(SiO)(XO)wherein, Reach independently represent an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, an aryl group having from 6 to 20 carbons, an aralkyl group having from 7 to 20 carbons, or a group in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms, with the proviso that at least two Rin a molecule are the alkenyl groups, X is a hydrogen atom or an alkyl group, a is a number from 0 to 0.3, b is 0 or a positive number, c is a positive number, d is a positive number, e is a number from 0 to 0.4, a+b+c+d=1, c/d is a number from 0 to 10, and b/d is a number from 0 to 0.5; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a cerium-containing organopolysiloxane; and (E) a hydrosilylation reaction catalyst. The curable silicone composition does not develop cracks due to thermal aging and can form a cured product having little yellow discoloration.