Fluorine-containing resin material lowly permeable to liquid...

Details Fluorine-containing resin material lowly permeable to liquid... Fluorine-containing resin material lowly permeable to liquid...

2006-02-14

2006-02-14

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S249000, C428S421000

Reexamination Certificate

active

06998454

ABSTRACT:
To provide a suitable material having improved impermeability to liquid chemicals and cracking resistance while retaining excellent heat resistance and processability inherent in FEP-based fluororesins, a molded article of which is useful in the field of semiconductor production apparatus and the like. The present invention provides a fluorine-containing resin material comprising a fluorine-containing copolymer comprising 85 to 95.5% by mole of a repeating unit derived from tetrafluoroethylene, 5 to 10% by mole of a repeating unit derived from hexafluoropropylene and 0.1 to 5% by mole of a repeating unit derived from at least one higher perfluoro(vinyl ether) represented by the formula (1):in-line-formulae description="In-line Formulae" end="lead"?CF2═CF—O—Rf1  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein Rf1is a perfluoroalkyl group having 5 to 10 carbon atoms or a perfluoro(alkoxyalkyl) group having 4 to 17 carbon atoms, and molded article thereof.

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English language translation of International Preliminary Examination Report for PCT/JP00/08286 dated Jan. 22, 2002.
International Search Report for PCT/JP00/08286, filed Feb. 27, 2001.

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