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. 29, 2005
Filed:
Jul. 26, 2001
Ronald Paul Boisvert, Midland, MI (US);
Duane Raymond Bujalski, Auburn, MI (US);
Kai Su, Midland, MI (US);
Ronald Paul Boisvert, Midland, MI (US);
Duane Raymond Bujalski, Auburn, MI (US);
Kai Su, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
This invention pertains to a siloxane resin composition comprising RSiOsiloxane units, RSiOsiloxane units and (RO)SiOsiloxane units wherein Ris an alkyl group having 1 to 5 carbons, hydrogen, or mixtures thereof; Ris a monovalent organic group having 6 to 30 carbons; Ris a branched alkyl group having 3 to 30 carbons, b is from 1 to 3; and the siloxane resin contains from 2.5 to 85 mole percent RSiOunits, 2.5 to 50 mole percent RSiOunits and 5 to 95 mole percent (RO)SiOunits. The siloxane resin is useful to make insoluble porous resin and insoluble porous coatings. Heating a substrate coated with the siloxane resin at a sufficient temperature effects removal of the Rand RO groups to form an insoluble insoluble porous coating having a porosity of 1 to 60 volume percent and a dielectric constant in the range of 1.5 to 3.0.