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:
Feb. 14, 1978
Filed:
Nov. 05, 1976
Applicant:
Inventors:
Harold W Tuller, Long Valley, NJ (US);
Ralph W Nussbaum, West Orange, NJ (US);
Assignee:
Allied Chemical Corporation, Morris Township, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
526238 ; 260 / ; 2608 / ; 526237 ; 526272 ; 526284 ; 526292 ; 526293 ; 526296 ; 526309 ; 526317 ;
Abstract
In a process for the production of a low molecular weight polyanhydride having a softening point within the range of about 111.degree. to 156.degree. C. by the mass polymerization reaction of a maleic monomer and at least one alkyl-substituted styrene at a temperature in the range of about 140.degree. to 200.degree. C., the improvement comprising employing an alkali metal bifluoride, preferably potassium bifluoride, as catalyst for the reaction.