Ethylene/tetrafluoroethylene copolymer composition

Details Ethylene/tetrafluoroethylene copolymer composition Ethylene/tetrafluoroethylene copolymer composition

2007-03-22

2010-10-26

Nutter, Nathan M (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000, C525S199000, C525S240000

Reexamination Certificate

active

07820774

ABSTRACT:
The present invention provides an ethylene/tetrafluoroethylene copolymer composition having a high melt flowability while maintaining satisfactory mechanical properties in the obtainable molded product are maintained. The ethylene/tetrafluoroethylene copolymer composition (C) has a melt viscosity of from 80 to 500 Pa·s, preferably from 100 to 300 Pa·s and a tensile elongation of from 200 to 500%, preferably from 350 to 450%. The copolymer composition (C) is may be obtained by melt kneading an ethylene/tetrafluoroethylene copolymer (A) having a low melt viscosity of from 60 to 400 Pa·s, preferably from 80 to 300 Pa·s and an ethylene/tetrafluoroethylene copolymer (B) having a melt viscosity higher than this i.e. from 600 to 10,000 Pa·s, preferably from 1,000 to 7,000 Pa·s in a mass ratio of (A)/(B)=50/50 to 99/1, preferably (A)/(B)=60/40 to 97/3.

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