Preparing technology for environment-friendly cathode electrophoresis paint

Abstract

The invention relates to the field of paint, in particular to a preparing technology for environment-friendly cathode electrophoresis paint. The electrophoresis paint is prepared from, by mass, 1-2 parts of color paste, 4-6 parts of emulsion and 5-7 parts of deionized water. According to a formula, the color paste is prepared from 20-30 parts of matrix resin, 5-10 parts of an alcohol ether cosolvent, 3-8 parts of organic acid, 0.3-0.7 part of an emulsifying agent, 1-5 parts of a composite drier, 30-40 parts of deionized water and 15-20 parts of filler. A preparing method of the composite drier includes the steps that one of oxalic acid, citric acid, glycolic acid and the like is selected and mixed with deionized water at the proportion of (1-10):10, the mixed solution is pre-mixed for 1 h at 60-80 DEG C, then 1-10 parts of a catalyst is added into the mixed solution in batches under stirring, a reaction is carried out for 4-10 h at 70-90 DEG C, and finally the composite drier soluble in water can be obtained by filtering out precipitate; according to a formula, the emulsion is prepared from 40-50 parts of modified epoxy resin A, 10-20 parts of modified epoxy resin B, 10-30 parts of a curing agent, 3-8 parts of unimolecular amine, 0.1-2 parts of an emulsifying agent, 0.1-2 parts of a neutralizing agent and 30-50 parts of deionized water.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation process of an environment-friendly cathodic electrophoretic coating. Background technique [0002] Since the advent of cathodic electrophoretic coatings, because the formed paint film has excellent corrosion resistance, mechanical properties, and is suitable for automatic coating, it has quickly become popular in the automotive industry. The baking temperature range of traditional cathodic electrophoretic coatings is generally 170 ~180°C. At present, many industrial workpieces are made of rubber, plastic and other materials, which are required to be dried together with electrophoretic coating after processing, so as to reduce the operating intensity of workers and control costs. However, such materials are easily deformed or melted when baked under high temperature conditions. In order to meet the needs of this type of process, there are very few varieties of low-temperatu...

AI Technical Summary

Problems solved by technology

Low-temperature curing cathodic electrophoretic coatings are not only beneficial to the coating of auto parts with plastic and rubber, but also can greatly reduce energy consumption. The organic lead and tin catalysts commonly used in cathodic electrophoretic coatings in the past have disadvantages such as high toxicity and environmental protection. Already restricted in Europe and developed countries

Images