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:
Dec. 30, 2014
Filed:
Sep. 22, 2011
John Bernard Horstman, Midland, MI (US);
Randall Schmidt, Midland, MI (US);
Steven Swier, Midland, MI (US);
John Bernard Horstman, Midland, MI (US);
Randall Schmidt, Midland, MI (US);
Steven Swier, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
Solid compositions of organosiloxane block copolymers are disclosed having a tensile strength greater than 1.0 MPa and a % elongation at break greater than 40%. The organosiloxane block copolymers comprise: 40 to 90 mole percent disiloxy units of the formula [RSiO] 10 to 60 mole percent trisiloxy units of the formula [RSiO] 0.5 to 35 mole percent silanol groups [≡SiOH] where Ris independently a Cto Chydrocarbyl, Ris independently a Cto Chydrocarbyl, wherein; the disiloxy units [RSiO] are arranged in linear blocks having an average of from 10 to 400 disiloxy units [RSiO] per linear block, the trisiloxy units [RSiO] are arranged in non-linear blocks having a molecular weight of at least 500 g/mol, and at least 30% of the non-linear blocks are crosslinked with each other, each linear block is linked to at least one non-linear block, and the organosiloxane block copolymer has a molecular weight (M) of at least 20,000 g/mole.