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Title:
PROCESS FOR PRODUCING TETRAFLUOROETHYLENE POLYMER
Document Type and Number:
WIPO Patent Application WO/2002/072646
Kind Code:
A1
Abstract:
A process for producing a tetrafluoroethylene polymer which comprises polymerizing tetrafluoroethylene having a content of impurities (e.g., saturated compounds such as CH¨2?F¨2? and CHF¨3? and unsaturated compounds such as CF¨2?=CFH, CF¨2?=CH¨2?, CF¨2?=CFCl, and CF¨2?=CHCl) of 100 ppm or lower in the presence of an aqueous medium and a polymerization initiator. By the process, PTFE can be obtained which can be evenly stretched in a high stretch ratio and has excellent suitability for fibrillation and a high breaking strength.

Inventors:
KOBAYASHI SHIGEKI (JP)
HOSHIKAWA JUN (JP)
KATO KAZUO (JP)
KAMIYA HIROKI (JP)
HIRAI HIROYUKI (JP)
Application Number:
PCT/JP2002/001876
Publication Date:
September 19, 2002
Filing Date:
February 28, 2002
Export Citation:
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Assignee:
ASAHI GLASS CO LTD (JP)
ASAHI GLASS FLUOROPOLYMERS CO (JP)
KOBAYASHI SHIGEKI (JP)
HOSHIKAWA JUN (JP)
KATO KAZUO (JP)
KAMIYA HIROKI (JP)
HIRAI HIROYUKI (JP)
International Classes:
C08F2/22; C08F2/16; C08F14/26; C08F114/26; (IPC1-7): C08F14/26; C08F2/16
Foreign References:
JPH03223219A1991-10-02
JPS6440507A1989-02-10
Other References:
See also references of EP 1291367A4
Attorney, Agent or Firm:
Senmyo, Kenji (38 Kanda-Higashimatsushitach, Chiyoda-ku Tokyo, JP)
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