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:
Jul. 06, 1982
Filed:
Feb. 15, 1980
Applicant:
Inventors:
Klaus Konig, Leverkusen, DE;
Wolfgang Reichmann, Duesseldorf, DE;
Manfred Schonfelder, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528272 ; 528274 ; 560 76 ; 560 98 ; 560127 ;
Abstract
The present invention relates to an improved process for the preparation of neopentyl glycol polyesters by reacting neopentyl glycol with carboxylic acids or derivatives thereof in the presence of minor amounts of glycols which boil at lower temperatures than neopentyl glycol. These low-boiling glycols obviate previous difficulties relating to the sublimation of neopentyl glycol. Thus, the present process offers safety advantages since neopentyl glycol does not crystallize in the reaction apparatus and also provides better control over the molecular ratio of acid groups to alcohol groups.