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A kind of aqueous epoxy/polyacrylate composite emulsion and preparation method thereof

A polyacrylate and water-based epoxy technology, used in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of affecting anti-corrosion performance, poor film compactness, and low cross-linking degree.

Active Publication Date: 2018-06-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the low crosslinking degree of water-based epoxy anti-corrosion coatings, the compactness of the coating film is poorer than that of solvent-based coatings, which affects various anti-corrosion properties.

Method used

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  • A kind of aqueous epoxy/polyacrylate composite emulsion and preparation method thereof
  • A kind of aqueous epoxy/polyacrylate composite emulsion and preparation method thereof
  • A kind of aqueous epoxy/polyacrylate composite emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 0.1kg nonylphenol polyoxyethylene ether, 0.2kg allyloxy nonylphenol propanol polyoxyethylene ether ammonium sulfate, 0.4kg hexadecane and 20kg deionized water to the reaction kettle A, mix well, and get Mix liquid. Add 4kg of butyl acrylate, 10.8kg of methyl methacrylate, and 0.2kg of acrylic acid into the reaction kettle B, add 6.5kg of epoxy resin E-44, fully dissolve it, and stir it evenly to obtain another mixed liquid. Under stirring, the liquid in the reactor B is gradually added dropwise to the reactor A, and the preliminary pre-emulsion is obtained after mixing. The preliminary pre-emulsion was added to a high-pressure homogenizer, and pre-emulsification was performed under a homogeneous pressure of 80 MPa to obtain a pre-emulsion. Dissolve 0.2kg of ammonium persulfate in 3kg of deionized water and stir evenly. Dissolve 0.08kg of BRUGGOLITE FF6M in 3kg of deionized water and stir well. Part of the monomer pre-emulsion was added to the reaction kettle C, a...

Embodiment 2

[0025] The 6.5kg epoxy resin E-44 added in the preparation method of the water-based epoxy / polyacrylate composite emulsion of this embodiment was replaced by 6.5kg E-51, and the others were the same as in Example 1.

Embodiment 3

[0027] The 6.5kg epoxy resin E-44 added in the preparation method of the water-based epoxy / polyacrylate composite emulsion of this embodiment is replaced by 6.5kg E-20, and the others are the same as in Example 1.

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Abstract

The invention discloses waterborne epoxy / polyacrylate composite emulsion and a preparation method thereof, and belongs to the field of high polymer materials. The preparation method comprises the following steps: dissolving a monomer containing vinyl into bisphenol A epoxy resin in a mass ratio of (92:8)-(40:60); in the presence of a solution of an emulsifier and a co-emulsifier, emulsifying by using a high-pressure homogenizer, a high-shearing homogenizer, an emulsification grinding machine, a cam rotor pump, a re-circulation type emulsifier, a vacuum homogenizer or a dispersed emulsification homogenizer, and initiating fine emulsion polymerization by using a redox initiator, thereby obtaining the waterborne epoxy / polyacrylate composite emulsion. The waterborne epoxy / polyacrylate composite emulsion can be stored for more than or equal to one year, various auxiliaries and anti-corrosion pigment and packing can be compounded by taking the emulsion as a main filming substance, then varnish and colored paint can be prepared, a high-property metal anti-corrosion coating can be prepared by using a waterborne epoxy curing agent, and the salt mist resistant time of a substrate can be greater than or equal to 2000 hours when the thickness of a steel plate coating of the substrate is about 70mu m.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a water-based epoxy / polyacrylate composite emulsion and a preparation method thereof. technical background [0002] Epoxy resin has been widely used in the field of coatings due to its excellent adhesion, thermal stability, chemical resistance, insulation and mechanical strength. Most commonly used epoxy resins are viscous liquid or solid, non-water-soluble, and only soluble in organic solvents such as aromatic hydrocarbons, ketones and alcohols. With the limitation of VOC (Volatile Organic Compounds) emissions, the application of solvent-based epoxy resins in the field of coatings is limited. Water-based epoxy resin uses water as the dispersion medium, the VOC emission is very low, and the safety is greatly improved, so water-based epoxy resin has become a new research direction for people. [0003] Epoxy resin water-based methods include direct emulsification meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F212/08C08F220/18C08F220/06C08F2/26C08F2/30C09D133/12C09D125/14C09D163/00C09D5/08
CPCC08F2/26C08F2/30C08F212/08C08F220/14C09D5/084C09D125/14C09D133/12C09D163/00C08L63/00C08L33/12C08L25/14C08F220/1804C08F220/06
Inventor 李效玉张琛邱藤郭隆海何立凡
Owner BEIJING UNIV OF CHEM TECH