IP Library › Granted Patent US 7,030,191
Granted Patent B2
US 7,030,191 · App. 11/209,417 · Granted Apr 18, 2006

Melt processible copolymer composition

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Quick Facts
Patent No.
US 7,030,191
App. No.
11/209,417
Granted
Apr 18, 2006
Kind
B2
Abstract

A composition comprising tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and PTFE micropowder with flex life superior to compositions made exclusively of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer having equivalent perfluoro(alkyl vinyl ether) content and melt flow rate.

Claims (9)

1. A melt processible composition comprising about 65 to 45% by weight of a copolymer of about 95 to 90% by weight of tetrafluoroethylene and about 5 to 10% by weight of perfluoro(alkyl vinyl ether) and about 35 to 55% by weight of polytetrafluoroethylene, wherein said copolymer has a melt flow rate of about 0.1 to 1.7 g/10 min at 372±1° C. and said polytetrafluoroethylene has a melt flow rate of not less than about 1 g/10 min at 372±1° C.

2. The composition of claim 1 , wherein said perfluoro(alkyl vinyl ether) is perfluoro(ethyl vinyl ether).

3. The composition of claim 1 , wherein said polytetrafluoroethylene has a melt flow rate at least about 10 units greater than the melt flow rate of the copolymer.

4. The composition of claim 1 , wherein said copolymer and polytetrafluoroethylene are melt mixed.

5. The composition of claim 1 , wherein the composition has a measured Flex Life of greater than 2.7 million cycles.

6. The composition of claim 1 , wherein the composition has a calculated Flex Life of greater than 1.3 million cycles.

7. A container comprising a composition including about 70 to 45% by weight of a copolymer of about 95 to 90% by weight of tetrafluoroethylene and about 5 to 10% by weight of perfluoro(alkyl vinyl ether) and about 30 to 55% by weight of polytetrafluoroethylene, wherein said copolymer has a melt flow rate of about 0.1 to 1.7 g/10 min at 372±1° C. and said polytetrafluoroethylene has a melt flow rate of not less than about 1 g/10 min at 372±1° C.

8. The composition of claim 7 , wherein the composition has a measured Flex Life of greater than 2.7 million cycles.

9. The composition of claim 7 , wherein the composition has a calculated Flex Life of greater than 1.3 million cycles.

Assignments (2)
CHANGE OF NAME Recorded Mar 31, 2022
From: DUPONT-MITSUI FLUOROCHEMICALS CO., LTD
To: CHEMOURS-MITSUI FLUOROPRODUCTS CO., LTD.
Reel/Frame 059458/0922 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 15, 2015
From: E. I. DU PONT DE NEMOURS AND COMPANY
To: THE CHEMOURS COMPANY FC, LLC
Reel/Frame 035432/0023 →