Title:
METHOD OF FORMING THIN FILM
Document Type and Number:
WIPO Patent Application WO/2004/085498
Kind Code:
A1
Abstract:
A method of forming a thin film of a vinylidene fluoride homopolymer having an I-form crystal structure, the method being usable for forming the film on various substrates in a relatively easy manner (coating conditions, procedure, etc.); a process for efficiently producing a high-purity vinylidene fluoride homopolymer having an I-form crystal structure; and a novel vinylidene fluoride homopolymer which can give a thin film having excellent ferroelectric characteristics. The method for thin vinylidene fluoride homopolymer film formation comprises (i) a step in which vinylidene fluoride is polymerized by free-radical polymerization in the presence of a C1-20 iodine or bromine compound having at least one moiety represented by -CRf1Rf2X1 (wherein X1 is iodine or bromine; and Rf1 and Rf2 are the same or different and each is one selected among fluorine and C1-5 perfluoroalkyls) to produce a raw powder of a vinylidene fluoride homopolymer consisting of the I-form crystal structure alone or comprising the structure as the main component and (ii) a step in which a vinylidene fluoride homopolymer which consists of the I-form crystal structure alone or comprises the structure as the main component and which is obtained from the raw powder of a vinylidene fluoride homopolymer consisting of the I-form crystal structure alone or comprising the structure as the main component is used to form a thin film on a substrate surface.
Inventors:
ARAKI TAKAYUKI (JP)
KODANI TETSUHIRO (JP)
KODANI TETSUHIRO (JP)
Application Number:
PCT/JP2004/004028
Publication Date:
October 07, 2004
Filing Date:
March 24, 2004
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
ARAKI TAKAYUKI (JP)
KODANI TETSUHIRO (JP)
ARAKI TAKAYUKI (JP)
KODANI TETSUHIRO (JP)
International Classes:
B32B27/30; C08F2/38; C08F14/22; B05D7/24; C08F114/22; C09D127/16; C23C14/12; (IPC1-7): C08F114/22; C08F2/38; B32B27/30
Foreign References:
| JP2002249519A | 2002-09-06 | |||
| JPH03221510A | 1991-09-30 | |||
| JPS60221409A | 1985-11-06 | |||
| JPH10212322A | 1998-08-11 | |||
| JPS5657811A | 1981-05-20 | |||
| JPS59117503A | 1984-07-06 | |||
| JPS6393736A | 1988-04-25 | |||
| JPH07179523A | 1995-07-18 |
Other References:
APSEY C.C. ET AL: "Fluoro-alkene forming eliminations using antimony pentafluoride", JOURNAL OF FLUORINE CHEMISTRY, vol. 77, 1996, pages 127 - 132, XP004020381
GUIOT J. ET AL: "Radicial Homopolymerization of Vinylidene Fluoride Initiated by tert-Butyl Peroxypivalate. Investigation of the Microstructure by 19F and 1H NMR spectroscopies and Mechanisms", MACROMOLECULES, vol. 35, 2002, pages 8694 - 8707, XP002980457
HANESAKA M. ET AL: "Analysis of Progression and LAM Bands Observed in Infrared and Raman Spectra of a Series of Vinylidene Fluoride Oligomers", MACROMOLECULES, vol. 35, 2002, pages 10210 - 10215, XP002980458
GUIOT J. ET AL: "Radicial Homopolymerization of Vinylidene Fluoride Initiated by tert-Butyl Peroxypivalate. Investigation of the Microstructure by 19F and 1H NMR spectroscopies and Mechanisms", MACROMOLECULES, vol. 35, 2002, pages 8694 - 8707, XP002980457
HANESAKA M. ET AL: "Analysis of Progression and LAM Bands Observed in Infrared and Raman Spectra of a Series of Vinylidene Fluoride Oligomers", MACROMOLECULES, vol. 35, 2002, pages 10210 - 10215, XP002980458
Attorney, Agent or Firm:
Asahina, Sohta (Tanimachi 2-chome Chuo-ku, Osaka-sh, Osaka 12, JP)
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