Technological method of preparation of self-emulsified waterborne epoxy coating
A water-based epoxy coating and preparation technology, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of unsatisfactory self-emulsification effect, poor weather resistance and salt water resistance, etc., so as to shorten the preparation time , Superior high temperature oxidation resistance, eliminating the effect of wear process
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[0020] A kind of preparation technology method of self-emulsifying waterborne epoxy paint, comprises the steps:
[0021] A. Grind the epoxy resin with a ball mill, colloid mill, or homogenizer, add an emulsifier to it, and stir vigorously to obtain an epoxy resin dispersion, and obtain a 6-12 μm nanoscale epoxy resin powder;
[0022] B. Adding the nano-scale epoxy resin obtained in the step A to an aqueous solution of an amidated polyamine emulsifier, and heating to obtain an epoxy resin water-based dispersion system;
[0023] C. Use the water-based epoxy resin prepared in the above steps A and B as the base material to prepare epoxy coatings. The specific steps include: (5-6) parts of acrylic acid and acrylate copolymers, (2-3) parts of curing agent, (1.2-2.2) parts of co-solvent and (35-45) parts of deionized water are added to (55-60) parts of epoxy resin water-based dispersion system;
[0024] D. In a temperature environment of 100-105° C., heat the mixed emulsion obt...
Embodiment 1
[0031] The formula is: 55 parts of water-based epoxy resin, 5 parts of acrylic acid and acrylate copolymer, 2 parts of amine curing agent, 1.2 parts of co-solvent and 35 parts of deionized water. When the ambient temperature is 101°C to 103°C, the obtained self-emulsifying water-based epoxy coating has a self-emulsifying efficiency of 99% and a self-emulsifying time of 5min-12min.
[0032] The water-based epoxy paint obtained from self-emulsification is subjected to the salt spray test and alkali resistance test stipulated in the national standard, and the parameter indexes are all higher than the existing indexes.
Embodiment 2
[0034]The formula is: 60 parts of water-based epoxy resin, 6 parts of acrylic acid and acrylate copolymer, 3 parts of curing agent, 2.2 parts of co-solvent and 45 parts of deionized water. When the ambient temperature is 102°C to 104°C, the obtained self-emulsifying water-based epoxy coating has a self-emulsifying efficiency of 100%, and the self-emulsifying time is 6min-12min.
[0035] The water-based epoxy paint obtained from self-emulsification is subjected to the salt spray test and alkali resistance test stipulated in the national standard, and the parameter indexes are all higher than the existing indexes.
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Abstract
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