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. 29, 1998
Filed:
Jun. 27, 1997
James A Davis, Indianapolis, IN (US);
Brian S Alexander, Sheridan, IN (US);
Bridgestone/Firestone, Inc., Akron, OH (US);
Abstract
A non-black roof sheeting material may be prepared from a composition of matter comprising 100 parts by weight of at least one polymeric rubber selected from the group consisting of ethylene-propylene-diene terpolymers, ethylene-propylene copolymers and other polyolefinic type polymers; from about 20 to about 300 parts by weight of a blend of at least two mineral fillers, per 100 parts of said polymeric rubber, wherein one of said mineral fillers is a reinforcing silica and wherein another of said mineral fillers is a chemically modified clay; from about 20 to about 150 parts by weight of a processing oil, per 100 parts of said polymeric rubber; from 1 to about 6 parts by weight of a sulfur cure package having at least one accelerator but being devoid of any thiuram accelerators, said cure package allowing said sheeting material to cure at about the same rate as a comparable black roof sheeting material at 160.degree. C. The non-black (white) sheeting material may form the ply of a white-on-black bilaminant roofing membrane or it may represent both the top and bottom ply of a non-black (white) polymeric roof sheeting material.