POLYPROPYLENE FILM
1332367 Polypropylene compositions GENERAL ELECTRIC CO 29 Sept 1970 [29 Sept 1969] 21737/73 Divided out of 1332366 Heading C3P [Also in Division H1] The dielectric in a wound capacitor comprises polypropylene film formed from particulate polypropylene having dispersed therein an epoxide stabilizer, e.g. dipentene dioxide, 1- epoxyethyl - 3,4 - epoxycyclohexane, the diglycidyl ether of bisphenol A or epoxidized linseed oil. The epoxide is added to the particulate resin and the mixture agitated to provide uniform distribution. A halogenated diphenyl dielectric liquid may be incorporated in the particulate resin at the same time, as in the parent Sepcification, which may obviate the need for further impregnation of the capacitor.