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. 29, 1994
Filed:
Nov. 20, 1992
Applicant:
Inventor:
Eui W Choe, Randolph, NJ (US);
Assignee:
Hoechst Celanese Corp., Somerville, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528190 ; 528176 ; 528193 ; 528194 ;
Abstract
Aromatic polyesters containing monomer units derived from terephthalic acid, one or more aromatic diols, such as bisphenol A, and one or more aromatic hydroxyacids, such as 4-hydroxybenzoic acid or 6-hydroxy-2-naphthoic acid, are described. The aromatic hydroxyacid is incorporated in a quantity sufficient to yield a polymer which is non-crystalline and which has a low enough softening temperature that it can be readily synthesized in the melt with a useful molecular weight without the need for subsequent solid state polymerization. These aromatic polyesters are useful for making transparent articles with high temperature properties.