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:
Oct. 21, 1980
Filed:
Dec. 11, 1978
Robert J Jones, Hermosa Beach, CA (US);
Robert W Vaughan, Manhattan Beach, CA (US);
Robert A Buyny, Redondo Beach, CA (US);
Michael K O'Rell, Manhattan Beach, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
Vinyl polybutadiene maleimide prepolymers which are peroxide curable are provided. The prepolymers are formed from the reaction product of a vinyl polybutadiene providing pendant vinyl groups and a maleimide and, more particularly, a mixture of aliphatic maleimides with cycloaliphatic or aromatic maleimides in combination with a peroxide-free radical initiator. The prepolymer is a vinyl polybutadiene backbone structure having grafted maleimide polymers forming cross-linking between polybutadiene backbone segments. The resultant prepolymer can be subsequently cured to a hard resin by heating in the presence of a peroxide-free radical initiator to form cross-linking between vinyl polybutadiene structures through the pendant vinyl groups. The resultant hard resin provides strength retention at elevated temperatures and exhibits a flexibility and strength without being brittle.