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. 20, 1995
Filed:
Apr. 29, 1994
Gerald L Witucki, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
A novel method for preparing an organically-modified, heat-curable silicone resin and the novel resin produced thereby are disclosed. In the method of the invention, a trialkoxysilane, a difunctional diorganosilicon compound, a polyol and a catalytic amount of an acidic cationic siloxane polymerization catalyst are reacted to substantial equilibrium to form an alkoxy-functional product. Substantially all the hydrolyzable alkoxy groups of the alkoxy-functional product are then hydrolyzed and the catalyst inactivated. The product is stripped of water and alcohol and may be diluted with a polar solvent such as xylene to the desired viscosity. The heat-cured resin product obtained in accordance with the invention has superior hardness, flexibility and solvent and impact resistance.