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:
Jun. 05, 1984
Filed:
Dec. 23, 1982
Applicant:
Inventors:
Matthias Marx, Bad Durkheim, DE;
Wolfgang Straehle, Heidelberg, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560200 ; 560 91 ; 560 93 ; 568 46 ;
Abstract
Polyester polyols and/or polyester-polyether polyols are prepared by reacting polyols preferably di- to hexafunctional polyether polyols with hydroxyl numbers of 30 to 200 with at least one carboxylic anhydride, preferably glutaric anhydride, resulting in a carboxylic acid half ester which is subsequently oxyalkylated with at least one alkylene oxide, preferably ethylene oxide in the presence of at least 1 thiodialkylene glycol, preferably thiodiethylene and/or thiodipropylene glycol.