Title:
PERFLUOROCARBON COPOLYMER HAVING FUNCTIONAL GROUPS AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1995/010541
Kind Code:
A1
Abstract:
A perfluorocarbon copolymer having functional groups is produced by dispersing a perfluorocarbon monomer having a functional group, represented by the following general formula (1): CF2 = CF-O-(CF2CF(CF3)-O)n-(CF2)m-Z, in water in the form of fine particles having an average diameter of 2 'mu'm or less, adding at least one water-soluble organic chain transfer agent selected from the group consisting of C1-C6 aliphatic alcohols and C2-C6 ethers to the resultant dispersion, and copolymerizing the monomer (1) with tetrafluoroethylene, wherein m represents an integer of 2 to 4; Z represents CO2R (wherein R represents C1-C3 alkyl) or SO2F; and n represents 1 or 2 when Z represents CO2R, while n represents an integer of 0 to 2 when Z represents SO2F. The invention process prevents the formation of a tetrafluoroethylene homopolymer in water phase and provides a perfluorocarbon copolymer excellent in melt moldability and functions.
Inventors:
NAKAYAMA YOSHIMICHI (JP)
YONEZAWA MASAAKI (JP)
YONEZAWA MASAAKI (JP)
Application Number:
PCT/JP1994/001682
Publication Date:
April 20, 1995
Filing Date:
October 07, 1994
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
NAKAYAMA YOSHIMICHI (JP)
YONEZAWA MASAAKI (JP)
NAKAYAMA YOSHIMICHI (JP)
YONEZAWA MASAAKI (JP)
International Classes:
C08F2/16; C08F214/26; C08F216/14; (IPC1-7): C08F2/16; C08F8/00; C08F214/26; C08F216/16
Foreign References:
| JPH06184244A | 1994-07-05 | |||
| JPS62288617A | 1987-12-15 | |||
| JPS60250009A | 1985-12-10 | |||
| JPS63297406A | 1988-12-05 | |||
| JPH0433904A | 1992-02-05 |
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