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:
Mar. 18, 1980
Filed:
May. 19, 1978
Werner Schmidt, St. Augustin, DE;
Rudeger Minke, Troisdorf-Sieglar, DE;
Dynamit Nobel Aktiengesellschaft, Troisdorf, DE;
Abstract
An improvement in a process for preparing an antimony oxide stabilized polymethylene terephthalate polymeric composition wherein polymethylene terepthalate is produced by polycondensing a polymethylene terephthalate precondensate, the improvement residing in compounding said precondensate with said antimony oxide and thereafter subjecting the resultant composition to solid phase polycondensation. In particular is described a process for the stabilization of high molecular weight (high viscosity) polymethylene terephthalate wherein together with the antimony oxide there is added a stabilizer or other additive to the precondensate and the resultant composition is subjected to solid phase polycondensation. Also described are the resultant products of such processes.