Title:
LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE POWDER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2010/114033
Kind Code:
A1
Abstract:
Provided are a low molecular weight polytetrafluoroethylene powder that, when used as an additive in coating material, and the like, can form a coating with excellent texture and gliding properties while also improving dispersion properties and viscosity; and a preparation method therefor. The preparation method for the low molecular weight polytetrafluoroethylene powder is characterized by involving an emulsion polymerization process for generating emulsified particles by polymerizing at least tetrafluoroethylene in the presence of a polymerization initiator and an aqueous medium; an aggregation process for generating an aggregate powder by aggregating the above emulsified particles; and a suspension polymerization process for polymerizing at least tetrafluoroethylene in the presence of the aforementioned aggregate powder, a polymerization initiator, and an aqueous medium.
Inventors:
YAMANAKA TAKU (JP)
TSUJI MASAYUKI (JP)
KASAI SHUNJI (JP)
SAWADA YASUHIKO (JP)
TSUJI MASAYUKI (JP)
KASAI SHUNJI (JP)
SAWADA YASUHIKO (JP)
Application Number:
PCT/JP2010/055891
Publication Date:
October 07, 2010
Filing Date:
March 31, 2010
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
YAMANAKA TAKU (JP)
TSUJI MASAYUKI (JP)
KASAI SHUNJI (JP)
SAWADA YASUHIKO (JP)
YAMANAKA TAKU (JP)
TSUJI MASAYUKI (JP)
KASAI SHUNJI (JP)
SAWADA YASUHIKO (JP)
International Classes:
C08F2/16; C08F14/26; C08J3/12
Domestic Patent References:
| WO2004050727A1 | 2004-06-17 |
Foreign References:
| JP2001049068A | 2001-02-20 | |||
| JP2007510028A | 2007-04-19 | |||
| JP2004514769A | 2004-05-20 | |||
| JPH07165828A | 1995-06-27 | |||
| JPH10147617A | 1998-06-02 | |||
| JPS61162503A | 1986-07-23 | |||
| JPS4878252A | 1973-10-20 | |||
| JPS5141085A | 1976-04-06 | |||
| JP2005002322A | 2005-01-06 | |||
| JP2006509072A | 2006-03-16 | |||
| JPH07165828A | 1995-06-27 | |||
| US2534058A | 1950-12-12 | |||
| JP2009001745A | 2009-01-08 | |||
| JPH0420507A | 1992-01-24 |
Other References:
TAKAOMI SATOGAWA: "Handbook of Fluoropolymers", 1990, THE NIKKAN KOGYO SHIMBUN, LTD., pages: 27
See also references of EP 2415788A4
See also references of EP 2415788A4
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
Patent business corporation Yasutomi international patent firm (JP)
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