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:
Oct. 02, 1990
Filed:
Feb. 23, 1989
Applicant:
Inventor:
Ulrich Thiele, Bruchkoebel, DE;
Assignee:
Davy McKee, AG, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08L / ;
U.S. Cl.
CPC ...
524706 ; 524709 ; 524789 ; 524878 ;
Abstract
A process for the production of linear polyesters, the acid component consisting essentially of terephthalate units and the glycol component of ethylene glycol, by transesterification or direct esterification in the presence of an aluminum silicate-ethylene glycol suspension followed by polycondensation. An acidic phosphorus compound and subsequently an alkaline compound are added to the aluminum silicate before or during the formation of the suspension.