Patent ID: 9156930
Filing Date: 2015-10-13
Classification: C08F,C08J,C08K,C08L,H01G

Abstract:
1. A film for a film capacitor comprising a tetrafluoroethylene resin (a1) that comprises a vinylidene fluoride unit and a tetrafluoroethylene unit in the vinylidene fluoride unit/tetrafluoroethylene unit (mol % ratio) of 5/95 to 49/51 as a film-forming resin (A) and, the tetrafluoroethylene resin (a1) further comprises an ethylenically unsaturated monomeric unit, and the tetrafluoroethylene resin (a1) is a tetrafluoroethylene (TFE) - vinylidene fluoride (VDF) resin (a1-1) that consists of 55.0 to 90.0 mol % of the tetrafluoroethylene unit, 5.0 to 44.9 mol % of the vinylidene fluoride unit, and 0.1 to 10.0 mol % of the ethylenically unsaturated monomeric unit represented by the formula (1): wherein X 1 , X 2 , X 3 , and X 4 are the same as or different from one another, and are each represent H, F, or Cl; and n is an integer of 0 to 8, provided that compounds of the formula (1) are neither tetrafluoroethylene nor vinylidene fluoride, a tetrafluoroethylene (TFE)-vinylidene fluoride (VDF) resin (a1-2) that consists of 55.0 to 90.0 mol % of the tetrafluoroethylene unit, 9.2 to 44.2 mol % of the vinylidene fluoride unit, and 0.1 to 0.8 mol % of the ethylenically unsaturated monomeric unit represented by the formula (2): wherein Rf l is a C1-C3 alkyl group or a C1-C3 fluoroalkyl group, or a tetrafluoroethylene (TFE)-vinylidene fluoride (VDF) resin (a1-3) that consists of 55.0 to 90.0 mol % of the tetrafluoroethylene unit; 5.0 to 44.8 mol % of the vinylidene fluoride unit; 0.1 to 10.0 mol % of the ethylenically unsaturated monomeric unit represented by the formula (1): wherein X 1 , X 2 , X 3 , and X 4 are the same as or different from one another, and are each represent H, F, or Cl; and n is an integer of 0 to 8, provided that compounds of the formula (1) are neither tetrafluoroethylene nor vinylidene fluoride; and 0.1 to 0.8 mol % of the ethylenically unsaturated monomeric unit represented by the formula (2): wherein Rf