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:
Dec. 18, 1990
Filed:
Nov. 21, 1989
Applicant:
Inventors:
Bongsub Kim, Grosse Ile, MI (US);
Hermann Kaack, Ruppertsberg, DE;
Assignee:
BASF Corporation, Parsippany, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568315 ;
Abstract
The present invention relates to an improved process for the preparation of 2-hydroxy-4-(hydroxyalkoxy)-benzophenone. More particularly the invention is directed to the oxyalkylation of 2,4-dihydroxy benzophenone, using C.sub.2 to C.sub.4 alkylene oxides in the presence of a basic catalyst and water. Such products are useful as ultraviolet light absorbers.