Completely swelling-free metalized film capacitor potting wax and preparation method thereof

Abstract

The invention relates to completely swelling-free metallized film capacitor potting wax and a preparation method thereof. The metallized film capacitor potting wax comprises a component A consisting of vegetable oil, polyolefin resin and a catalyst and a component B consisting of vegetable oil and a cross-linking agent. The preparation method comprises the following steps: pretreatment: adding the vegetable oil into a vacuum high-temperature heating tank for degassing and dehydration, and then cooling to normal temperature; adding vegetable oil and polyolefin resin into the heating tank, heating, cooling to normal temperature, adding a catalyst, stirring, and adding the raw materials in parts by weight to obtain the component A and the component B; and uniformly mixing the component A and the component B according to the weight ratio, filling and sealing, and standing to obtain a jelly-shaped solid, namely the metalized film capacitor filling and sealing wax. The metalized film capacitor filling and sealing wax is free of swelling, is in an elastic jelly wax shape after being filled and sealed, is adjustable in hardness, is not separated from a capacitor shell at all the shrinkage rates, and is good in sealing effect.

Description

technical field [0001] The invention relates to a fully non-swellable metallized film capacitor potting wax and a preparation method thereof, belonging to the technical field of new wax materials. Background technique [0002] In the electrical industry, self-healing metallized capacitors, as one of the electronic components, have developed rapidly due to their excellent cost performance, stable reactive power compensation and safety. With the continuous improvement and improvement of electrical manufacturing technology, the insulation of capacitors The performance requirements of sealing materials are also constantly increasing. Potting wax is the first choice of most low-voltage shunt capacitor manufacturers at present, because it has good electrical properties, heat resistance and aging stability, and its price is low. However, wax is a solid impregnated potting compound, which will shrink and crack, and the pores formed will easily lead to ionization, and discharge at a...