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

A technology of polyacrylate and acrylate, which is applied in the field of new epoxy-polyacrylate "core-shell" emulsion and its preparation, can solve the problem of decreased epoxy retention rate of epoxy resin, affecting the performance of epoxy resin, epoxy resin Problems such as radical ring opening, to achieve the effect of retaining excellent performance, reducing the probability of side reactions, and small side reactions

Inactive Publication Date: 2016-09-14
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of novel epoxy-polyacrylate "core-shell" emulsion, the method comprising steps:

[0021] (1) Emulsify the epoxy resin emulsion prepared by the phase inversion method with one-third of the acrylate mixed monomer at a temperature of 20°C~40°C for 0.5 hours;

[0022] (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;

[0023] (3) Cool down to below 50°C and discharge.

Embodiment 2

[0025] The preparation method of the novel epoxy-polyacrylate "core-shell" emulsion described in Example 1, the acrylate mixed monomer described in step (1) is butyl acrylate, styrene, methyl methacrylate, acrylic acid A mixture of hydroxy esters, hydroxy acrylate is a kind of hydroxy ethyl acrylate, hydroxy propyl acrylate, hydroxy ethyl methacrylate, the initiator described in step (2) is sodium persulfate, potassium persulfate, persulfate A type of ammonium sulfate.

Embodiment 3

[0027] The preparation method of the novel epoxy-polyacrylate "core-shell" emulsion described in embodiment 1 or 2, step (1), (2) used epoxy resin emulsion solid content 50 wt%, and butyl acrylate, acrylic acid The mass ratio of hydroxyesters, methyl methacrylate, and styrene is (3~18):4:(3~5):(2~4):(1~3), and the initiator described in step (2) The dosage is 0.5%~1.5wt% of the total amount of acrylate mixed monomers.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/10C08F2/32
Inventor 刘立柱张笑瑞李金凤翁凌崔巍巍
Owner HARBIN UNIV OF SCI & TECH
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