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. 31, 2015
Filed:
Mar. 14, 2013
Dow Corning Corporation, Midland, MI (US);
David J. Deshazer, Bay City, MI (US);
Steven Swier, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
A light guide has a transmission of greater than 90 percent, a refractive index greater than 1.4, and less than 10 haze percent. The light guide also includes an organosiloxane block copolymer having a weight average molecular weight of at least 20,000 g/mole. The organosiloxane block copolymer includes 40 to 90 mole percent disiloxy units of the formula [RSiO] arranged in linear blocks each having an average of from 10 to 400 disiloxy units [RSiO] per linear block, 10 to 60 mole percent trisiloxy units of the formula [RSiO] arranged in non-linear blocks each having a weight average molecular weight of at least 500 g/mol, and 0.5 to 25 mole percent silanol groups [≡SiOH]. Ris independently a Cto Chydrocarbyl and Ris independently a Cto Chydrocarbyl. Moreover, at least 30% of the non-linear blocks are crosslinked with another non-linear block and aggregated in nano-domains.