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. 09, 1994
Filed:
Aug. 25, 1993
Terrence L Hartman, Franklin Park, NJ (US);
Charles A Cody, Robbinsville, NJ (US);
Rheox, Inc., Hightstown, NJ (US);
Abstract
Disclosed are polyurethane base resins, and polyurethane composites and adhesive compositions formed using the base resins. The polyurethane base resins are formed by reacting a polycarbodiimide-modified 4, 4'-diphenylmethane diisocyanate with a mixture of the following polyols: (a) a hydroxyl-terminated, linear, saturated liquid copolyester diol having a glass transition temperature of at most -10.degree. C. and at least -60.degree. C.; and (b) a homopolyester polyol that is a ring-opened polymer of a cyclic ester. The polyurethane composites include typical active hydrogen-containing species that will react with isocyanates and promote curing, in addition to the polyurethane base resin. The polyurethane adhesive compositions, which are thermosetting, include the cured polyurethane base resin, cured by exposure to moisture or any other applicable curing mechanism. The adhesive compositions have improved performance (e.g., tensile strength and adhesion) at elevated service temperatures, and are suitable for high performance automotive structural bonding applications.