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A kind of waterborne two-component paint with high impact resistance and its application

A water-based two-component, impact-resistant technology, used in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve problems such as uncontrollable, limited epoxy resin content, and inability to fully meet impact resistance and corrosion resistance. Achieve the effect of improving impact resistance and obtaining a simple method

Active Publication Date: 2021-05-14
SHANGHAI SHOWA HIGHPOLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the performance of epoxy resin is improved by modifying the molecular structure such as graft polymerization, there are certain uncontrollable factors, which are easy to consume the functional groups of the epoxy resin itself, which affects its original advantageous performance.
[0006] In addition, CN104788627A, CN108329438A, the preparation method of acrylic acid modified epoxy mentioned in CN105732881A is to add epoxy resin and water to carry out phase inversion emulsion after solvent polymerizing acrylic resin; or carry out acrylic acid monomer in the solution of epoxy resin Polymerization, followed by phase inversion emulsion, there will still be quite a lot of solvents in these systems, if it is removed by vacuum distillation, the energy consumption and environmental impact will be great
Moreover, the method of dissolving epoxy resin in acrylic monomers and carrying out emulsion polymerization has a limited content of epoxy resin, usually only 8% to 60%, which still cannot fully meet the impact resistance and corrosion resistance of some application environments. have higher requirements

Method used

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  • A kind of waterborne two-component paint with high impact resistance and its application
  • A kind of waterborne two-component paint with high impact resistance and its application
  • A kind of waterborne two-component paint with high impact resistance and its application

Examples

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Effect test

Embodiment 1

[0037] The present embodiment provides a water-based two-component paint, comprising a composite emulsion and a curing agent with a weight ratio of 8:1, and the composite emulsion includes the following components by weight: 0.2 parts of thickener (Aidike UH- 420), 0.2 parts of ammonia water, 0.7 parts of dispersant (Santa Nopco SN-5040), 0.1 part of defoamer (BASF WBA), 8 parts of iron oxide, 7 parts of mica powder, 0.8 parts of titanium dioxide, 48 parts of water-based ring Oxygen emulsion, 12 parts of water-based acrylic emulsion, 1 part of film-forming aid; the curing agent is polyamide resin.

[0038] Wherein, the water-based epoxy emulsion is a bisphenol A type epoxy resin emulsion; the water-based acrylic emulsion uses butyl acrylate, isooctyl acrylate, methacrylic acid, styrene, and hydroxyethyl acrylate as monomers, Among them, methacrylic acid accounts for 1wt%, hydroxyethyl acrylate accounts for 1wt%, and the proportion of other soft and hard monomers is adjusted. T...

Embodiment 2

[0041]This embodiment provides a water-based two-component paint. The difference from Example 1 is that the water-based acrylic emulsion uses polyoxyethylene alkyl ether emulsifier and allyloxy nonylphenol polyoxyethylene ether ammonium sulfate As the emulsifier, wherein, by weight percentage, the usage amount of allyloxynonylphenol polyoxyethylene ether ammonium sulfate is 15wt% of the total amount of the emulsifier.

[0042] The preparation method of this water-based two-component paint is the same as in Example 1.

Embodiment 3

[0044] The present embodiment provides a water-based two-component paint, and the difference from Example 1 is: the weight ratio of the water-based epoxy emulsion and the water-based acrylic emulsion is adjusted to 6.5:1, that is, 52 parts of water-based epoxy emulsion, 8 water-based acrylic emulsion.

[0045] The preparation method of this water-based two-component paint is the same as in Example 1.

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Abstract

The invention relates to the field of polymer materials, in particular to a water-based two-component paint with high impact resistance and its application. The water-based two-component paint includes a composite emulsion and a curing agent. The composite emulsion includes a water-based epoxy emulsion and a water-based acrylic emulsion. It not only has the same water resistance and chemical resistance as the single-component water-based epoxy emulsion, but also can improve Impact resistance. At the same time, the present invention also optimizes the emulsification system of the water-based acrylic emulsion, improves the mechanical stability of the water-based epoxy emulsion and the water-based acrylic emulsion after mixing, and avoids demulsification or gelation. The water-based two-component paint can be applied in the field of engineering machinery, especially metal protective coatings that require impact resistance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a water-based two-component paint with high impact resistance and its application. Background technique [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 liquids or solids, insoluble in water, 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. When the water-based epoxy resin uses water as the dispersion medium, the VOC emission is very low and the safety is greatly improved, so the water-based epoxy resin has become a new research direction. [0003] However, although water-based epoxy resin has the above-mentioned excellent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D133/08C09D5/08
CPCC09D5/08C09D163/00C08L33/066
Inventor 李晖
Owner SHANGHAI SHOWA HIGHPOLYMER CO LTD
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