Title:
TETRAFLUOROETHYLENE COPOLYMER, PROCESS FOR PRODUCING THE SAME AND PASTE EXTRUDATE
Document Type and Number:
WIPO Patent Application WO/2004/052953
Kind Code:
A1
Abstract:
A tetrafluoroethylene copolymer not melt molded and excelling in paste extrudability, comprising units derived from tetrafluoroethylene and units derived from a monomer represented by the formula CF2=CF-O-(CF2)nCF=CF2 (wherein n is an integer of 1 to 6), wherein the content of units derived from the monomer represented by the above formula is in the range of 0.1 to 0.5 mass%, the tetrafluoroethylene copolymer exhibiting a primary particle diameter of 0.1 to 0.5 μm, a standard specific gravity of 2.14 to 2.25 and a paste extrusion pressure of 24.5 to 73.5 MPa; fine powder of such a tetrafluoroethylene copolymer; a process for producing the same; and a paste extrudate thereof. The tetrafluoroethylene (TFE) copolymer excels in paste extrudability, and the resultant extrudate has excellent heat resistance and transparency.
Inventors:
KOBAYASHI SHIGEKI (JP)
HIGUCHI SHINYA (JP)
ARAI MASATAKA (JP)
NAGAI HIROKI (JP)
HIGUCHI SHINYA (JP)
ARAI MASATAKA (JP)
NAGAI HIROKI (JP)
Application Number:
PCT/JP2003/014742
Publication Date:
June 24, 2004
Filing Date:
November 19, 2003
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
KOBAYASHI SHIGEKI (JP)
HIGUCHI SHINYA (JP)
ARAI MASATAKA (JP)
NAGAI HIROKI (JP)
KOBAYASHI SHIGEKI (JP)
HIGUCHI SHINYA (JP)
ARAI MASATAKA (JP)
NAGAI HIROKI (JP)
International Classes:
C08F6/14; C08F214/26; (IPC1-7): C08F214/26
Foreign References:
JPH05186532A | 1993-07-27 | |||
JPS63238115A | 1988-10-04 | |||
JPH05170834A | 1993-07-09 | |||
JPS6356532A | 1988-03-11 | |||
JP2000136280A | 2000-05-16 |
Other References:
See also references of EP 1568720A4
Attorney, Agent or Firm:
Senmyo, Kenji (38 Kanda-Higashimatsushitach, Chiyoda-ku Tokyo, JP)
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