METHOD EPOXY COMPOUND FOR PRODUCTION OF A ROLL-TYPE CAPACITOR Russian patent published in 1994 - IPC

FIELD: electronics. SUBSTANCE: capacitor is manufactured by spiral coiling. A 5 microns thick aluminum foil is used as capacitor plates. Prior to impregnating and sealing, the coiled sections are dried at 110 10 C and residual pressure 66.5 Pa. A as impregnating and potting compound is used a composition made of epoxy 4,4'-isopropyldenediphenol resin containing at least 20 epoxy groups, isomethyltetrahydrophthalic anhydride, boron nitride having particle size not larger than the foil plate thickness, and 2,4 6-tris-(dimethylaminemethyl) phenol. After potting, the capacitor is treated by a residue pressure not exceeding 66.5 Pa for at least 1 hour and then by excess pressure not tower than 0.3 MPa for at least 4 hours. After impregnating, the compound is polymerized at atmospheric pressure. EFFECT: enlarged operating capabilities; increased capacitor dissipation. 3 cl, 1 dwg, 1 tbl