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:
Dec. 27, 1994
Filed:
Jul. 12, 1993
Applicant:
Inventor:
Bobby J Sublett, Kingsport, TN (US);
Assignee:
Eastman Chemical Company, Kingsport, TN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525437 ; 528272 ; 528296 ; 528302 ; 528308 ; 5283086 ;
Abstract
Disclosed is an improved process for the preparation of branched polyethylene terephthalate and co-polyethylene terephthalate, having high melt viscosities. The process comprises carrying out the polymerization of the branched polyethylene terephthalate in intimate admixture with a small amount of isophthalic acid. Polyethylene terephthalate with high melt viscosities are obtained and are free from inhomogeneities.