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Preparation of high epoxy content aqueous epoxy/acrylate composite emulsion

A water-based epoxy and acrylate technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of high viscosity and low viscosity of the system

Active Publication Date: 2018-12-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem of high viscosity of the system caused by too high epoxy resin content, on the one hand, increase the temperature of the pre-emulsion, and emulsify the pre-emulsion in a high-pressure homogenizer at a pressure of 60-120MPa and 50-70°C. Monomer miniemulsion, which can effectively reduce its viscosity

Method used

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  • Preparation of high epoxy content aqueous epoxy/acrylate composite emulsion
  • Preparation of high epoxy content aqueous epoxy/acrylate composite emulsion
  • Preparation of high epoxy content aqueous epoxy/acrylate composite emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 122g epoxy resin E-44 is dissolved in the mixture containing 58g methyl methacrylate, 20g butyl acrylate, 2g acrylic acid, 3g n-hexadecane and 3g oil-soluble oxidation type initiator cumene hydroperoxide to form Mixture A. Mixture B was formed by adding emulsifiers 6 g of nonionic emulsifier NSA-1777 and 2 g of anionic emulsifier SE-10N to 225 g of deionized water. Add mixture B to mixture A and mix well using a magnetic stirrer to form a pre-emulsion. Heating to 50-60°C, and obtaining monomer mini-emulsion after high-shear homogenization by a high-shear homogenizer at a linear speed of 500m / min. 1.2 g of water-soluble reduced initiator FF6M was dissolved in 40 g of water. Add 25% of the monomer mini-emulsion and 25% of the reducing initiator into the reactor to form a seed emulsion, and when the reaction temperature reaches 60°C, the remaining 75% of the monomer mini-emulsion and 75% of the reducing initiator are mobilized Add dropwise to the reaction kettle. Subse...

Embodiment 2

[0024] 122g epoxy resin E-44, 58g methyl methacrylate, 20g butyl acrylate added in the preparation method of a kind of high epoxy content water-based epoxy / acrylate composite emulsion of this embodiment are changed into 140g epoxy resin E-44. 44, 43.2g methyl methacrylate, 16.8g butyl acrylate, others are the same as in Example 1.

Embodiment 3

[0026] 122g epoxy resin E-44, 58g methyl methacrylate, 20g butyl acrylate added in the preparation method of a kind of high epoxy content waterborne epoxy / acrylate composite emulsion of this embodiment are changed into 160g epoxy resin E-44. 44, 19.2g methyl methacrylate, 20.8g butyl acrylate, others are identical with embodiment 1.

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Abstract

The invention relates to a preparation method of a high epoxy content waterborne epoxy / acrylate composite emulsion, which belongs to the field of a high-molecular material. The epoxy resin with a content of 61 to 90% is mainly used as a main component, and a small amount of 10% to 39% of an acrylate monomer is added, in the presence of an emulsifier and a co-emulsifier, the epoxy resin and the acrylate monomer are subjected to action of a high-shear homogenizer and a high-pressure homogenizer, and fine emulsion polymerization is initiated by using an oil-soluble initiator to obtain the high epoxy content aqueous epoxy / acrylate composite emulsion. The emulsion can be stored for more than one year at room temperature. The emulsion is used as a film-forming substance, and various additives and pigments and fillers are added to prepare a varnish and a color paint. The high epoxy content aqueous paint is obtained by solidifying an aqueous epoxy resin curing agent, when the substrate is a steel plate, the salt spray resistance time can be more than three months.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to the preparation of a water-based epoxy / acrylate composite emulsion with high epoxy content. technical background [0002] Epoxy resins are widely used in the repainting industry due to their excellent adhesion to metals and high resistance to heat, water and chemicals. Epoxy resins usually have good stability after curing. However, during actual use, epoxy resins have poor weather resistance, resulting in poor performance, so the anti-corrosion performance is also affected. One of the great advantages of acrylic paints over epoxy resins is that they have good weather resistance and good hydrolysis resistance. Therefore, acrylate modified by epoxy resin can combine the advantages of epoxy resin and acrylate to form a hybrid anti-corrosion coating. [0003] In the monomer composition of water-based epoxy / acrylate composite emulsion, increase the content of epoxy resin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F212/08C08F220/18C08F220/06C09D163/00C09D133/12C09D125/14C09D5/08
CPCC08F212/08C08F220/14C08F220/18C09D5/08C09D163/00C08F220/1804C08L33/12C08L25/14C08F220/06
Inventor 李效玉张迪
Owner BEIJING UNIV OF CHEM TECH