Film capacitor

Details Film capacitor Film capacitor

H - Electricity

01

G

403/23

H01G 4/18 (2006.01) C08L 83/08 (2006.01) H01B 3/46 (2006.01)

Patent

CA 1308860

ABSTRACT OF THE DISCLOSURE The dielectric polymeric film in the inventive film capacitor is formed from a cyanoalkyl-containing organopolysiloxane repre- sented by the average unit formula R1aR2bSiO(4-a-b)/2, in which R1 is a cyanoalkyl group having 3 to 5 carbon atoms, R2 is a hydrogen atoms monovalent hydrocarbon group or halogenat- ed monovalent hydrocarbon group) the subscript a is a positive number in the range from 0.8 to 1.8 and the subscript b is zero or a positive number not exceeding 1.0,with the proviso that a+b is in the range from 1.1 to 1.98. As compared with films of conventional cyanoethylated polymers and fluorocarbon resins used for the same purpose, such an organopolysiloxane film is very advantage- ous as a dielectric film of film capacitors in respect of the large di- electric constant, small dielectric loss, small moisture absorption and excellent thermal stability so that the film capacitor of the in- vention exhibits greatly upgraded performance.

585074

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