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:
Dec. 13, 1983
Filed:
Aug. 30, 1982
Michael C Lee, Sterling Heights, MI (US);
Darrel S Nelson, Warren, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method of mixing crosslinkable elastomeric polymers and reinforcing fillers has been developed that yields significant improvements in physical properties compared to like polymers mixed by conventional methods. The method entails working a filler-polymer mixture at a temperature between the glass transition temperature and the liquid-liquid temperature of the uncrosslinked polymer to enhance filler integration. The mixture is then heated to a temperature greater than the flow temperature of the uncrosslinked polymer and worked so that air bubbles dispersed in the mixture are eliminated. The heating and cooling steps are repeated until the filler particles are thoroughly integrated and substantially all air bubbles are eliminated.