Thermoplastic polymer composition having barrier properties

Details Thermoplastic polymer composition having barrier properties Thermoplastic polymer composition having barrier properties

2005-01-11

2005-01-11

Mullis, Jeffrey (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S060000, C525S071000

Reexamination Certificate

active

06841618

ABSTRACT:
The present invention provides a thermoplastic polymer composition which is obtained through dynamic vulcanization performed by mixing an ethylene-vinyl alcohol copolymer (I), a modified block copolymer (II) which comprises an aromatic vinyl polymer block and a conjugated diene polymer block and which has a functional group consisting of a carboxyl group and/or its derivative, and an amine crosslinking agent (III), wherein the ethylene-vinyl alcohol copolymer (I) has an ethylene content of from 10 to 60 mole % and has a melt flow rate of from 1 to 20 g/10 minutes, and the amount of the functional group consisting of a carboxyl group and/or its derivative which the modified block copolymer (II) has is from 2 to 20 groups per molecule. The thermoplastic polymer composition is excellent in both barrier properties to gases, organic liquids and the like and flexibility.

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U.S. Appl. No. 10/369,503, filed Feb. 21, 2003, Masuda.
U.S. Appl. No. 10/728,991, filed Dec. 8, 2003, Masuda et al.

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