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:
Aug. 01, 1995
Filed:
Jan. 18, 1994
Donald T Liles, Midland, MI (US);
Kenneth M Lee, Bay City, MI (US);
David J Romenesko, Midland, MI (US);
James W White, South Glamorgan, CE61, 2XS, Wales, GB;
David L Murray, Midland, MI (US);
Other;
Abstract
A crumb-like silicone rubber powder is uniformly dispersed in a polystyrene polymer using conventional equipment, such as a twin screw extruder, to provide a resin having up to a ten fold improvement in impact strength over the unmodified polymer. The novel silicone rubber powder of the invention is prepared by isolating the particles obtained from a polymerization of an unsaturated monomer in the presence of an aqueous emulsion of a hydroxyl-functional polydiorganosiloxane which has been precured using an organotin curing catalyst and a crosslinker which contains unsaturated functionality.