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. 18, 1989
Filed:
Oct. 22, 1987
Applicant:
Inventors:
Eize Roerdink, Beek, NL;
Jean M Warnier, Stein, NL;
Assignee:
Stamicarbon B.V., AC Geleen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528339 ; 264234 ; 264345 ; 264347 ; 528347 ; 528481 ; 528503 ;
Abstract
The invention relates to a copolyamide for application in films with improved barrier properties. The copolyamide containing tetramethyleneadipamide and tetramethylene-isophtalamide in a ratio between 9:1 and 1:9 and a relative viscosity of at least 2.0, and a process for the production of the copolyamide. Preferably the copolyamide contains a small amount of a compound that induces the formation of networks between the polyamide chains.