Epoxy-polyacrylate "core-shell" emulsion and preparation method thereof

Abstract

Novel epoxy-polyacrylate "core-shell" emulsion and preparation method thereof, water-based epoxy resin usually refers to the emulsion, aqueous dispersion or formed by dispersing epoxy resin in the water phase in the form of particles, droplets or colloids Aqueous solution, the difference between the three lies in the particle size of the dispersed phase of epoxy resin. Novel epoxy-polyacrylate "core-shell" emulsion steps: (1) Emulsify the epoxy resin emulsion prepared by the phase inversion method with one-third of the acrylate mixed monomer at 20°C~40°C for 0.5 (2) Add the initiator into the reaction system, add the remaining acrylate mixed monomer drop by drop at a temperature of 80°C~90°C, finish adding within 3~4 hours, and keep warm for 1~5 hours; (3 ) to cool below 50°C and discharge. The product of the invention is used as paint or paint base material.

Description

Technical field: [0001] The invention relates to a novel epoxy-polyacrylate "core-shell" emulsion and a preparation method thereof. Background technique: [0002] Waterborne epoxy resin usually refers to the emulsion, aqueous dispersion or aqueous solution formed by the epoxy resin dispersed in the water phase in the form of particles, droplets or colloids. The difference between the three is that the particle size of the dispersed phase of the epoxy resin is different. . According to different preparation methods, there are four methods for water-based epoxy resin: mechanical method, chemical modification method, phase inversion method and curing agent emulsification method. The mechanical method and the phase inversion method mainly modify the epoxy resin by physical methods. The advantage is that the process is simple, but the stability is poor; the chemical modification method is also called the self-emulsification method, which introduces some hydrophilic groups into t...

AI Technical Summary

Problems solved by technology

The mechanical method and the phase inversion method mainly modify the epoxy resin by physical methods. The advantage is that the process is simple, but the stability is poor; the chemical modification method is also called the self-emulsification method, which introduces some hydrophilic groups into the On the molecular chain of epoxy resin, the advantage is that the emulsion has good stability, but the ring opening of the epoxy group will occur during the modification process, and the epoxy retention rate of the epoxy resin will decrease during the reaction process, which will affect the performance of the epoxy resin