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. 13, 1983
Filed:
Aug. 10, 1982
Alain Fau, Tassin la Demi-Lune, FR;
Parasko Nicou, Francheville, FR;
Rhone-Poulenc Specialites Chimiques, Courbevoie, FR;
Abstract
Solventless organopolysiloxane compositions are well adopted as coating/impregnating materials for a wide variety of substrates to provide, e.g., water repellant/solvent resistant gaskets and various substrates possessing enhanced non-stick characteristics, are comprised of (i) an .alpha.,.omega.-dihydroxypolydiorganopolysiloxane having a viscosity, measured at 25.degree. C., ranging from 5 to 100,000 mPa.s and consisting essentially of recurring units of the formula Z.sub.2 SiO (ii) a polyorganopolysiloxane having from 1.60 to 1.90 organic radicals per silicon atom, having a viscosity ranging from 30 mPa.s at 25.degree. C. to 3,000 mPa.s at 25.degree. C., having from 0.2 to 10% of hydroxyl groups and consisting essentially of the recurring units RSiO.sub.1.5, R.sub.2 SiO and R.sub.3 SiO.sub.0.5 (iii) a crosslinking agent containing a polyalkoxysilyl group; and (iv) a catalytically effective amount of an organic iron or zirconium catalyst soluble in the organopolysiloxane medium.