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:
Mar. 05, 2013
Filed:
Sep. 22, 2011
Masanori Takanashi, Tokyo, JP;
Hideki Kobayashi, Tokyo, JP;
Masanori Takanashi, Tokyo, JP;
Hideki Kobayashi, Tokyo, JP;
Momentive Performance Materials Japan LLC, Tokyo, JP;
Abstract
A curable polyorganosiloxane composition for use in an LED or optical lens, including: (A) an alkenyl group-containing polyorganosiloxane which contains a (A1) branched polyorganosiloxane including an SiOunit and an RSiOunit, and optionally an RSiO unit and/or an RSiOunit, wherein at least three R per molecule are vinyl groups, and optionally (A2) a linear polyorganosiloxane having R bonded to a silicon atom, wherein at least two R per molecule are vinyl groups, wherein 100 mol % or more of the R present in components (A1) and (A2), excluding alkenyl groups, are methyl groups; (B) a polyalkylhydrogensiloxane including an SiOunit and an R(CH)SiOunit, the polyalkylhydrogensiloxane having the formula [R(CH)SiO][SiO]or [R(CH)SiO][SiO], wherein each Rrepresents a hydrogen atom, and (C) a platinum-vinylsiloxane complex. The composition having desirable light transmission properties, and is unlikely to suffer yellowing due to exposure to heat.