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Patent Searching and Data


Title:
GRANULAR POLYTETRAFLUOROETHYLENE POWDERS AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1998/047950
Kind Code:
A1
Abstract:
Nonfilled and filled granular PTFE powders each having a high apparent density, a small quantity of electrostatic charge and excellent powder fluidity, capable of providing moldings freed from deterioration of tensile strength and elongation and coloration caused by surfactants, and having a high degree of whiteness; and a process for producing the same, which comprises wetting 100 parts by weight of a PTFE powder alone or a mixture thereof with a filler with 30 to 60 parts by weight of an aqueous solution of a nonionic surfactant comprising a hydrophobic segment composed of poly(oxyalkylene) units each having 3 to 4 carbon atoms and a hydrophilic segment composed of poly(oxyethelene) units and granulating the wet powder by a mechanical force.

Inventors:
ASANO MICHIO (JP)
KAWAHARA KAZUYA (JP)
Application Number:
PCT/JP1998/001794
Publication Date:
October 29, 1998
Filing Date:
April 17, 1998
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
ASANO MICHIO (JP)
KAWAHARA KAZUYA (JP)
International Classes:
C08F14/26; C08J3/12; C08J3/205; (IPC1-7): C08J3/12
Foreign References:
JPS5417782B11979-07-03
JPH03255133A1991-11-14
JPH0952955A1997-02-25
JPH08208929A1996-08-13
Other References:
See also references of EP 0980887A4
Attorney, Agent or Firm:
Asahina, Sohta (2-22 Tanimachi 2-chome, Chuo-k, Osaka-shi Osaka, JP)
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