4.6/4.I copolyamide and a process for the preparation thereof

Details 4.6/4.I copolyamide and a process for the preparation thereof 4.6/4.I copolyamide and a process for the preparation thereof

1987-10-22

1989-07-18

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

264234, 264345, 264347, 528347, 528481, 528503, C08G 6926

Patent

active

048494984

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.

REFERENCES:
patent: 4719284 (1988-01-01), Nielinger et al.

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