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:
Jun. 17, 1980
Filed:
Dec. 28, 1978
Applicant:
Inventors:
Assignee:
ATO Chimie, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525420 ; 525419 ; 528292 ; 528301 ; 528323 ;
Abstract
A process to synthesize poly (ether-ester-amide) sequence copolycondensates by the reaction in a molten condition between a dicarboxylic polyamide, in which the carboxylic functions are located at the chain-ends, and a polyoxyalkoylene with hydroxylated chain-ends, in the presence of a catalyst. This reaction is performed continuously in a thin-film reaction space through which the reaction mixture passes continuously under turbulent flow conditions. This process, which involves much shorter reaction times, produces sequence copolycondensates with better mechanical properties than corresponding substances obtained by batch processes.