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. 02, 2015
Filed:
Sep. 21, 2011
John Horstman, Midland, MI (US);
Ann Norris, Blacksburg, VA (US);
Steven Swier, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
An organosiloxane block copolymer includes 65 to 90 mol % of diorganosiloxane units having the formula R-SiO(I). These diorganosiloxane units are arranged in linear blocks which have an average of from 10 to 400 diorganosiloxane units per linear block. The organosiloxane block copolymer also includes 10 to 35 mol % of siloxane units that have the average formula R(OR)SiO(II). The siloxane units are arranged in nonlinear blocks having at least 2 siloxane units per nonlinear block wherein 0.5≦x≦1.5 and 0≦y≦1. In addition, each Ris independently a Cto Chydrocarbyl, each Ris independently an aryl or Cto Chydrocarbyl, at least 50 mol % of Rare aryl, and each Ris independently Ror H. Moreover, the organosiloxane block copolymer has a light transmittance of at least 95%.