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:
Mar. 18, 1997
Filed:
Mar. 28, 1995
Applicant:
Inventors:
Gangfeng Cai, West Chester, PA (US);
Lau S Yang, Wilmington, DE (US);
Jeffrey A Klang, Exton, PA (US);
Assignee:
ARCO Chemical Technology, L.P., Greenville, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528274 ; 522-1 ; 522 93 ; 522102 ; 524777 ; 524783 ; 524784 ; 524785 ; 524786 ; 524845 ; 525437 ; 528176 ; 528193 ; 528194 ; 528272 ; 528275 ; 528280 ; 528281 ; 528282 ; 528283 ; 528286 ; 528306 ; 528307 ;
Abstract
A two-step process for making polyetherester resins is disclosed. A low molecular weight polyol reacts with an aromatic dicarboxylic acid in step one to produce a polyester intermediate. In step two, the polyester intermediate reacts with an anhydride or an aliphatic dicarboxylic acid in the presence of an insertion catalyst to produce a polyetherester resin that contains greater than about 10 wt. % of recurring units derived from the aromatic dicarboxylic acid. The polyetheresters are useful for making thermoset resins with excellent mechanical properties and chemical resistance.