Polyurethane wire enamel and preparation method thereof

Abstract

The invention discloses polyurethane wire enamel which is characterized by being prepared from raw materials in parts by weight (kilogram) as follows: 12-15 parts of polyurethane resin, 10-15 parts of E-12 epoxy resin, 1-2 parts of monobutyltin oxide, 2-3 parts of montmorillonite powder, 6-9 parts of pentaerythritol hexaacrylate, 3-4 parts of 1,6-hexamethylene diisocyanate, 12-15 parts of nylon 12, 2-3 parts of tree ash, 1-2 parts of 2-ethyl-4-methylimidazole, 3-4 parts of jade powder, 7-9 parts of an assistant, 100-120 parts of xylene and 100-120 parts of m, p-cresol. According to a preparation method, defects of poor flexibility, small adhesive force and smaller DV (diameter and velocity) values of a polyurethane enamelled wire produced with a conventional method are overcome, and the adherence and the heat resistance are improved. According to the polyurethane wire enamel prepared with the method, the margin of a wire coating process is large, and the wire coating velocity is high. The method can be used for preparing novel 180-grade polyurethane wire enamel with high DV values.

Description

Technical field [0001] The invention relates to an enameled wire paint, in particular to a polyurethane enameled wire paint and a preparation method thereof. Background technique [0002] Enameled wire is an electrical material, which is a thin high-strength insulating layer processed on the surface of a round copper wire to insulate from the outside world. According to the specifications, it can be processed into a woolen thread thinner than a hair, and a yarn-covered thread as thick as a thumb. Enameled wire has good insulation effect and waterproof ability. It is widely used in electrical appliances, such as motors, generators, water pumps, electromagnets, welding machines, household appliances, wireless communications, speakers, telegraphs, transformers, etc. Enameled wire paint is a necessary insulating material for the production of enameled wire. Enameled wire paint requires good adhesion, mechanical strength, insulation performance, heat resistance, abrasion resistance,...

AI Technical Summary

Problems solved by technology

Enameled wire enamel is a necessary insulating material for the production of enameled wire. Enameled wire enamel requires good adhesion, mechanical strength, insulation performance, heat resistance, wear resistance, salt spray resistance and harsh environment resistance, etc., but ordinary wire enamel has resistance to It is difficult to meet the requirements of different environments due to problems such as thermal resistance, poor wear resistance, insufficient strength, and heat resistance below 120°C.