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. 08, 1995
Filed:
Aug. 24, 1994
Thomas Grosse-Puppendahl, Haltern, DE;
Walter K Homann, Duelmen, DE;
GAF-Huels Chemie GmbH, Marl, DE;
Abstract
A high-molecular-weight polyester is to be prepared in such a way that it is possible to very quickly and advantageously obtain even relatively small amounts having a very high molecular weight. This is achieved by preparing a polyester containing proportions of an alkene diol by continuing the polycondensation step until a viscosity number from 5 to 150 cm.sup.3 /g is reached and subsequently subjecting the polyester thus obtained to a treatment with ionizing radiation until the required viscosity number is reached. With the aid of the process of the invention it is possible to obtain high-molecular-weight polyesters having the desired property profile.