Waterborne epoxy acrylate-grafted composite emulsion and preparation method thereof

A technology of epoxy acrylate and epoxy acrylic acid, which is applied in the field of preparation of water-based epoxy acrylate grafted composite emulsion, can solve the problems of organic solvent pollution, poor storage stability, low grafting rate, etc., achieve good adhesion, improve High compatibility and high grafting rate

Inactive Publication Date: 2012-05-02
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process solves the problems of low grafting rate, poor storage stability and

Method used

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  • Waterborne epoxy acrylate-grafted composite emulsion and preparation method thereof
  • Waterborne epoxy acrylate-grafted composite emulsion and preparation method thereof
  • Waterborne epoxy acrylate-grafted composite emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Preparation of epoxy acrylate

[0045] 0.4g of tetrabutylammonium bromide and 2.0g of acrylic acid monomer were mixed evenly and dissolved for later use. Put 20.0g of E-51, 0.05g of hydroquinone and 40.0g of methyl methacrylate dispersion medium into the four-necked bottle, heat up to 100°C within 40 minutes, and drop the uniformly mixed catalyst and acrylic acid mixture, Adding time is controlled within 50 minutes. After the dropwise addition, keep the temperature at 110°C for one hour, measure the acid value until the acid value is less than 5mgKOH / g resin, then cool down to room temperature.

[0046] The above reaction products were separated, and then analyzed by infrared spectrum and hydrogen nuclear magnetic resonance spectrum. figure 1 It is the infrared spectrogram of the reaction product of epoxy resin E-51 and epoxy acrylate. Of which 915.03cm -1 Is the absorption peak of epoxy group, 831.67cm -1 The place is the absorption peak of two adjacent H atoms on...

Embodiment 2

[0057] As shown in Table 1, the raw materials used are the same as in Example 1 except that the reactant soft monomer butyl acrylate is changed to ethyl acrylate.

[0058] The implementation data of table 1 embodiment 2

[0059] Ingredients ratio and reaction conditions

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Abstract

The invention relates to the field of manufacture of epoxy acrylate composite resin materials, in particular to a waterborne epoxy acrylate-grafted composite emulsion and a preparation method thereof. The process mainly comprises the following steps of: firstly, by taking a polymerizing monomer as a dispersing medium, enabling epoxide resin and acrylic acid to react under the action of tetrabutylammonium bromide to generate an epoxy acrylate monomer; and secondly, pre-emulsifying the epoxy acrylate monomer and other monomers and then enabling the epoxy acrylate monomer and other monomers to generate a copolymerization reaction to prepare the waterborne epoxy acrylate-grafted composite emulsion by adopting a semi-continuous seeded emulsion polymerization method. According to the process, the copolymerization monomer is used as a solvent dispersing medium for the esterification reaction of the epoxide resin and the acrylic acid in the first step and is also a monomer of the copolymerization reaction in the second step; an organic solvent in the reaction of the first step is prevented from being removed by adopting reduced pressure distillation, so that the influence of residual solvent on the performance of the product is avoided; the waterborne epoxy acrylate-grafted composite emulsion has high grafting rate and can be used for improving the compatibility of the epoxide resin and acrylic acid resin and enhancing the performances of the water resistance, the adhesive force, the salt resistance and the like of a coating and can be widely applied to the fields of metal coatings, building coating materials and the like.

Description

technical field [0001] The invention relates to the field of manufacturing epoxy acrylate composite resin materials, in particular to a method for preparing a water-based epoxy acrylate graft composite emulsion. Background technique [0002] Epoxy resin has excellent adhesion, corrosion resistance, thermal stability and chemical resistance. It is mainly used in the fields of coatings, adhesives and composite materials. However, epoxy resin is often brittle after cross-linking and curing, and needs to be improved. Sex can be applied. Acrylic resin has excellent gloss and outdoor aging resistance, and is widely used in general industrial equipment (storage tanks, bridges), automobile industry and construction industry coating fields. However, the structure of acrylic resin is generally a chain-like linear structure, and the crosslinking density is low. The coating has the disadvantage of "hot stickiness and cold brittleness", and its anti-corrosion performance and adhesion ar...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/18C08F220/14C08F220/06C08F2/30C08F2/26
Inventor 唐二军陈占虎王姗边锋
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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