Capacitor aluminum shell coating and production and coating method thereof

Abstract

The invention discloses capacitor aluminum shell coating and a production and coating method thereof. The coating is composed of a composition A and a composition B; the composition A is prepared from 40-50 parts of polyester resin, 10-15 parts of epoxy resin, 10-20 parts of S100# solvent oil, 10-20 parts of PMA (polymethyl acrylate), 1-2 parts of a dispersing agent, 1-2 parts of organic organo-siloxane debubbling and leveling agent, 0.3-0.5 part of acid catalysts, 3-5 parts of insulation carbon black and 5-8 parts of mica powder; the composition B is prepared from 15-20 parts of permethylated amino resin, 5-6 parts of polymethylene amino resin, 15-30 parts of n-butyl acetate and 3-5 parts of butoxy cellosolve. The production method includes: respectively producing the composition A and the composition B, and well mixing to obtain the coating. The coating method includes: subjecting an aluminum substrate to alkaline washing, uniformly coating the surface of the aluminum oxide substrate with the capacitor aluminum shell coating at the room temperature, and curing.

Description

technical field [0001] The invention belongs to the technical field of insulating and heat-resistant materials, and in particular relates to a coating coating for capacitor aluminum shells and a production and coating method thereof. Background technique [0002] With the technological advancement of the electronic technology industry, the manufacturing technology of electronic printed circuit boards has also made great progress. In order to reduce the size of electronic products and reduce consumption, capacitors, as one of the general components on electronic circuit , heat dissipation, small volume and other requirements are getting higher and higher, and the requirements for its insulation and breakdown resistance are also getting higher and higher. [0003] The insulation performance of electrolytic capacitors is better. First, the surface coating of the capacitor aluminum shell must have high insulation, so that the surface breakdown resistance of the capacitor aluminu...

AI Technical Summary

Problems solved by technology

In fact, this method only reduces the secondary pollution of chlorine-containing coatings, but there are still problems such as poor temperature resistance and high production costs.

Although the above capacitor protection has certain practical performance, the production efficiency is low. For high-demand application fields, high insulation performance and heat resistance performance often cannot meet the requirements.

Images