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:
Apr. 16, 1991
Filed:
Feb. 06, 1989
Linda D Kennan, Midland, MI (US);
Theodore L Knapp, Midland, MI (US);
Carl M Monroe, Midland, MI (US);
Olgerts Skostins, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
An improved reinforcing silica filler can be produced by treating a reinforcing silica, having a surface area of greater than 50 m.sup.2 /g and from 0.5 to 6 parts by weight of adsorbed moisture per 100 parts by eight of silica, with a volatile treating agent comprising a combination of from 0.2 to 10 parts by weight of volatile treating agent of the formula Vi.sub.x Si(OR').sub.4-x and from 0.2 to 15 parts by weight of volatile treating agent of the formula Ph.sub.x Si(OR').sub.4-x, where Vi is vinyl radical and Ph is phenyl radical. The improved reinforcing silica filler can be combined with polydiorganosiloxane and curing means to produce silicone elastomer compositions which can be cured to elastomers which have improved physical properties, such as compression set and heat aging.