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:
Sep. 14, 1999
Filed:
Dec. 10, 1998
Jon Vierling DeGroot, Jr, Midland, MI (US);
Carl Allen Fairbank, Midland, MI (US);
William James Schulz, Jr, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
A curable organosiloxane-polyisobutylene composition comprising 20 to 87 weight percent of a polyisobutylene comprising at least 2 alkenyl groups per molecule, 0.4 to 70 weight percent of a polyorganosiloxane comprising at least 2 silicon-bonded alkenyl groups per molecule, 7 to 50 weight percent of a treated reinforcing silica filler, an amount sufficient to cure the composition of an organohydrogensiloxane crosslinker, and a platinum-group metal hydrosilation catalyst in an amount sufficient to effect curing of the composition. Cured elastomers prepared from the compositions can have improved resistance to gas and vapor permeability.