TREA

ETHYLENE/TETRAFLUOROETHYLENE COPOLYMER COMPOSITION

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Information

  • Patent Application
  • 20070232754
  • Publication Number
    20070232754
  • Date Filed
    March 22, 2007
    17 years ago
  • Date Published
    October 04, 2007
    16 years ago
Information
Abstract
To provide an ethylene/tetrafluoroethylene copolymer composition having a high melt flowability while the mechanical properties of 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 obtainable 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.
Description
Claims
  • 1. An ethylene/tetrafluoroethylene copolymer composition (C) with a high melt flowability, which has a melt viscosity of from 80 to 500 Pa·s and a tensile elongation of from 200 to 500%.
  • 2. The ethylene/tetrafluoroethylene copolymer composition (C) according to claim 1, wherein the melt viscosity is from 100 to 350 Pa·s and the tensile elongation is from 250 to 450%.
  • 3. The ethylene/tetrafluoroethylene copolymer composition (C) according to claim 1, wherein the melt viscosity is from 100 to 300 Pa·s and the tensile elongation is from 350 to 450%.
  • 4. The ethylene/tetrafluoroethylene copolymer composition (C) according to claim 1, which comprises an ethylene/tetrafluoroethylene copolymer (A) having a melt viscosity of from 60 to 400 Pa·s and an ethylene/tetrafluoroethylene copolymer (B) having a melt viscosity of from 600 to 10,000 Pa·s in a mass ratio of (A)/(B)=50/50 to 99/1.
  • 5. The ethylene/tetrafluoroethylene copolymer composition (C) according to claim 4, wherein the melt viscosity of the ethylene/tetrafluoroethylene copolymer (A) is from 80 to 300 Pa·s and the melt viscosity of the ethylene/tetrafluoroethylene copolymer (B) is from 1,000 to 7,000 Pa·s.
  • 6. The ethylene/tetrafluoroethylene copolymer composition (C) according to claim 5, wherein the mass ratio is (A)/(B)=60/40 to 97/3.
  • 7. The ethylene/tetrafluoroethylene copolymer composition (C) according to claim 5, wherein the mass ratio is (A)/(B)=70/30 to 95/5.
  • 8. A process for producing the ethylene/tetrafluoroethylene copolymer composition (C) as defined in claim 4, which comprises melting and kneading the ethylene/tetrafluoroethylene copolymer (A) and the ethylene/tetrafluoroethylene copolymer (B).
Priority Claims (1)
Number Date Country Kind
2006-102479 Apr 2006 JP national