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:
Feb. 01, 1977
Filed:
Mar. 11, 1974
Augustin T Chen, Hamden, CT (US);
William J Farrissey, Jr, Northford, CT (US);
The Upjohn Company, Kalamazoo, MI (US);
Abstract
Poly(ester amides) are obtained by heating a hydroxyl-containing or hydroxyl-free polyester of malonic acid with an organic polyisocyanate in the presence of a basic catalyst. Crosslinking of the polyester takes place by reaction of the isocyanate with the active hydrogen of the CH.sub.2 group of the malonate to give amide linkages, in addition to formation of urethane linkages in the case where the polyester contains free hydroxyl groups. The products range from elastomeric materials, where the isocyanate is in the form of an isocyanate-terminated prepolymer derived by reaction of an organic polyisocyanate with a polyol, to more rigid plastics where the isocyanate is a 'simple' isocyanate, i.e. not in prepolymer form.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile