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:
Nov. 20, 1984
Filed:
Aug. 17, 1983
Franciscus J Huntjens, Arnhem, NL;
Anton H Brouwer, Oosterbeek, NL;
Akzo N.V., Arnhem, NL;
Abstract
The invention relates to novel high molecular weight polyester-ester urethanes containing blocks of ester units of a high melting polyester and of blocks of ester units of a low melting polyester which are linked together through ester groups and/or urethane groups. The melting point of the polyester-ester urethanes is at least 150.degree. C. and when the blocks of ester units of the low melting polyester form part of less than 50% by weight of the total number of ester units the upper limit of the glass transition range Tg.sub.(e) thereof does not exceed +20.degree. C. and when said blocks of ester units of the low melting polyester form part of more than 50% by weight of the total number of ester units, the upper limit of the glass transition range Tg.sub.(e) is not higher than -5.degree. C. The polyester-ester urethanes are prepared by reacting a high melting polyester and a low melting polyester in the molten phase, after which the resulting polyester-ester is reacted with a low molecular weight polyisocyanate. When the number of end groups of the high melting polyester and the low-melting polyester together amount to more than 700 meq per kg, the transesterification catalyst present in one or in both polyesters or polyester amides is entirely or partly deactivated before and/or during the preparation of the polyester-ester.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile