Title:
FLUOROCOPOLYMER AND FLUORORESIN COMPOSITION LOWLY PERMEABLE TO LIQUID CHEMICAL
Document Type and Number:
WIPO Patent Application WO/2001/040331
Kind Code:
A1
Abstract:
A novel PFA-based fluorocopolymer which has improved impermeability to liquid chemicals while retaining the excellent heat resistance, stress cracking resistance, and processability inherent in PFA-based fluororesins; and a material and a molded article which comprise the copolymer and are for use in the field of semiconductor production apparatuses, etc. The fluorocopolymer comprises 90 to 99.4 mol% repeating units derived from tetrafluoroethylene, 0.5 to 5 mol% repeating units derived from at least one lower perfluoro(alkyl vinyl ether) represented by the formula (1): CF¿2?=CF-O-Rf?1¿ (wherein Rf?1¿ is C¿2-4? perfluoroalkyl), and 0.1 to 5 mol% repeating units derived from at least one higher perfluoro(vinyl ether) represented by the formula (2): CF¿2?=CF-O-Rf?2¿ (wherein Rf?2¿ is C¿5-10? perfluoroalkyl or C¿4-17? perfluoroalkoxyalkyl) and has a melt flow rate of 0.1 to 100 g/10 min and a melting point of 290 to 325°C. Also provided is a resin composition containing the fluorocopolymer.
Inventors:
TAIRA TAKAHIRO (JP)
AOYAMA TAKAHISA (JP)
OTANI KATSUHIDE (JP)
SHIMIZU TETSUO (JP)
AOYAMA TAKAHISA (JP)
OTANI KATSUHIDE (JP)
SHIMIZU TETSUO (JP)
Application Number:
PCT/JP2000/008280
Publication Date:
June 07, 2001
Filing Date:
November 24, 2000
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
TAIRA TAKAHIRO (JP)
AOYAMA TAKAHISA (JP)
OTANI KATSUHIDE (JP)
SHIMIZU TETSUO (JP)
TAIRA TAKAHIRO (JP)
AOYAMA TAKAHISA (JP)
OTANI KATSUHIDE (JP)
SHIMIZU TETSUO (JP)
International Classes:
C08F214/26; C08L27/18; (IPC1-7): C08F214/26; C08L27/18
Foreign References:
| JPH0718026A | 1995-01-20 | |||
| JPH0966570A | 1997-03-11 | |||
| JPH1110653A | 1999-01-19 | |||
| EP0919575A1 | 1999-06-02 |
Attorney, Agent or Firm:
Asahina, Sohta (Tanimachi 2-chome Chuo-ku Osaka-shi, Osaka, JP)
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