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:
May. 15, 1984
Filed:
Mar. 14, 1983
James R Falender, Sanford, MI (US);
John C Saam, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
Oligomers of low molecular weight polydiorganosiloxanes, polydiorganocyclosiloxanes, or mixtures are polymerized in the presence of acidic or neutral reinforcing fillers. Trifluoromethane sulfonic acid is used as the polymerization catalyst. The method can also include endblocked polydiorganosiloxane to control the molecular weight of the silicone polymer in the silicone polymer-filler produced. The method combines the oligomer and filler, heats to from about 70.degree. to 150.degree. C., adds catalyst, adjusts temperature, and polymerizes the mixture, then inactivates with a Lewis base such as calcined magnesium oxide. The non-crepeing silicone polymer-filler mixture which is the product of the method is usable as electrical insulation grease, or as a reinforced polymer mixture useful in producing silicone elastomers. The mixture can be mixed with curing agents to produce heat curable and moisture curable elastomeric compositions.