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. 26, 1983
Filed:
Mar. 08, 1982
Applicant:
Inventors:
James H Covill, Pineville, NC (US);
Michael G Kelly, Coventry, RI (US);
Thomas F Leahy, E. Greenwich, RI (US);
Assignee:
American Hoechst Corporation, Somerville, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 87 ; 544388 ; 544406 ; 546170 ; 546326 ; 546327 ; 548492 ; 549 71 ; 549501 ; 560 11 ; 560 17 ; 560 52 ; 560 81 ; 560 84 ; 560 91 ; 560 93 ;
Abstract
An improved process for exterifying carboxyaromatics is disclosed wherein an anhydride of a carboxyaromatic, such as pyromellitic dianhydride, is reacted with a fluorinated alcohol and an epoxide to give a mixed ester capable of imparting oil and/or water repellency to textiles. The improvement comprises utilizing the epoxide as the reaction medium to reduce reaction times and waste water treatment requirements.