Coating composition for forming highly dielectric film and highly dielectric film
AssigneeDaikin Industries, Ltd.
InventorsMeiten Koh, Mayuko Tatemichi, Eri Mukai, Miharu Ota, Kouji Yokotani, Nobuyuki Komatsu
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Abstract
The present invention provides a nonporous highly dielectric film which can improve withstanding voltage, insulating property and dielectric constant, especially can decrease a dielectric loss at high temperatures and can be made thin, and a coating composition for forming the highly dielectric film comprising (A) a vinylidene fluoride resin, (B) a cellulose resin and (C) a solvent.
Claims10
A coating composition for forming a highly dielectric film without highly dielectric inorganic particles, comprising:
- (A) a vinylidene fluoride resin,
- (B) a cellulose resin, and
- (C) a solvent
- wherein the highly dielectric inorganic particles are particles of strontium titanate, barium titanate, lead zirconium titanate oxides (PZT), barium zirconium titanate, barium zirconate, strontium zirconate, calcium titanate or calcium zirconate, and
- wherein a mass ratio of the vinylidene fluoride resin (A)/cellulose resin (B) is 0.1/99.9 to 99.9/0.1,
- wherein the vinylidene fluoride resin (A) is a polymer comprising 60 to 100% by mole of vinylidene fluoride unit, 0 to 40% by mole of tetrafluoroethylene unit and 0 to 40% by mole of hexafluoropropylene, and
- the cellulose resin (B) is cellulose acetate or ether-substituted cellulose.
A nonporous highly dielectric film comprising a vinylidene fluoride resin (A) and a cellulose resin (B), and (A) is contained in an amount of 2 to 98 parts by mass when the total amount of (A) and (B) is assumed to be 100 parts by mass, and highly dielectric inorganic particles are not contained, wherein the highly dielectric inorganic particles are particles of strontium titanate, barium titanate, lead zirconium titanate oxides (PZT), barium zirconium titanate, barium zirconate, strontium zirconate, calcium titanate or calcium zirconate, and
- wherein the vinylidene fluoride resin (A) is a polymer comprising 60 to 100% by mole of vinylidene fluoride unit, 0 to 40% by mole of tetrafluoroethylene unit and 0 to 40% by mole of hexafluoropropylene, and
- the cellulose resin (B) is cellulose acetate or ether-substituted cellulose.
Dependencies are inferred from the claim text.