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. 16, 1980
Filed:
Jun. 12, 1979
Applicant:
Inventor:
Thomas J Hairston, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568727 ; 568723 ;
Abstract
An improved process for obtaining bisphenols by reaction of a phenol, or substituted phenol having a hydrogen in the para position, and an alkenyl ether, wherein the unsaturation in the ether is in the alpha position, in the presence of a strong acid catalyst. The process gives particularly good results when bisisopropenyl ether is reacted with phenol in the presence of a strong acid cation exchange resin in which part of the exchange sites have been neutralized with 2,2-dimethylthiazolidine.