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. 28, 1992
Filed:
Feb. 14, 1991
Applicant:
Inventors:
Afif M Nesheiwat, Madison, NJ (US);
Lacey E Scoggins, Bartlesville, OK (US);
Melvin D Herd, Idaho Falls, ID (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528388 ; 528171 ; 528174 ;
Abstract
According to this invention, improved results in terms of molecular weight and percent yield of aromatic sulfide/sulfone polymers are achieved by the employment of a low level modifying agent within a specific range in the polymerization reaction mixture. The modifying agent employed is a salt of an amino carboxylic acid. The salt can be employed as an already existing salt of an amino carboxylic acid or can be formed in situ by employing either an amino carboxylic acid and a base; or a lactam and a base.