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. 04, 1988
Filed:
Dec. 31, 1986
Antonius A Broekhuis, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
An elastomeric homopolymer or copolymer is reacted with or, in effect, grafted onto an unsaturated polyester and the reaction product or graft polymer may then be used in a thermosetting unsaturated polyester resin composition. The chemical linkage between the elastomeric polymer and the unsaturated polyester is a cyclic structure comprising 6 carbon atoms. The chemical bond is achieved by first treating the elastomeric polymer to incorporate a conjugated diolefin structure and then adding the conjugated diolefin group to an ethylenically unsaturated group in the polyester or a monomeric dienophile. When added to a monomeric dienophile, the polyester is then grafted onto the elastomeric polymer at the site of the monomeric dienophile. The chemical linkage or bonding occurs through a 4+2 Diels Alder addition. The reaction or grafting effectively incorporates an elastomer segment into the thermosetting polyester resin composition and imparts improved surface characteristics and impact resistance without risk of destructive phase separation which has, heretofore, occurred when thermoplastic elastomers were incorporated into thermosetting polyester resin compositions.