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Water-based single-component primer-topcoat coating and preparation method and application thereof

A single-component, coating technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of complex formulas and cumbersome application methods, and achieve low Tg value, good surface effect, and low interfacial tension. Effect

Active Publication Date: 2019-05-17
ASIA PAINT SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention uses polyurethane resin as the base material and isocyanate group as the curing agent to prepare acid and alkali resistant heavy-duty anti-corrosion coatings; after adding functional materials such as titanium dioxide, leveling agent, and hydrophobic additives, the weather resistance and hydrophobicity It has a certain repellency and decomposition function for dust and some pollutants, and can meet the requirements of petrochemical and related industries for anticorrosion protection coatings for open-air steel structure equipment, but its formula is too complicated and its application method is too cumbersome.

Method used

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  • Water-based single-component primer-topcoat coating and preparation method and application thereof
  • Water-based single-component primer-topcoat coating and preparation method and application thereof
  • Water-based single-component primer-topcoat coating and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0080] A water-based one-component bottom-surface-in-one coating comprises the following components according to mass percentage:

[0081]

[0082] Wherein, waterborne epoxy ester resin comprises following components according to mass percentage:

[0083]

[0084] The structure of the fatty acid modified epoxy resin is as follows:

[0085]

[0086] Among them, the ratio of n to m is 3:2, and X is The M of the fatty acid modified epoxy resin w =1500.

[0087] The preparation method of the coating of described water-based one-component bottom surface integration:

[0088] (a) Add the formula amount of water, fatty acid salt and organic bentonite to the stirring tank, stir at 800r / min for 5-10min, add the formula amount of water-based epoxy ester resin, stir at 400r / min until evenly mixed, add the formula Amount of iron oxide red, titanium dioxide, barium sulfate talcum powder and 50% of the formula amount of hydrophobic siloxane mixture defoamer, stirred at 800r / mi...

Embodiment 2

[0092] The difference from Example 1 is that the quality of fatty acid modified epoxy resin is replaced by unmodified epoxy resin.

[0093] The structure of the unmodified epoxy resin is as follows:

[0094]

[0095] where X is The unmodified epoxy resin M w =1100.

Embodiment 3

[0097] The difference with Example 1 is that the structure of the fatty acid modified epoxy resin is as follows:

[0098]

[0099] where X is The fatty acid modified epoxy resin M w =1500.

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Abstract

The invention provides water-based single-component primer-topcoat coating and a preparation method and application thereof. The coating is prepared from the following components in percentage by mass: 30-60% of water-based epoxy resin, 2-10% of water, 10-25% of a pigment, 20-40% of a filler and 1.1-7% of an assistant, and the coating does not contain a wetting dispersant and a film-forming assistant. The coating is used as drinking fresh water cabin coating, container inner cabin coating or steel structure light anti-corrosion coating, a coating formula is simple, the preparation method is simple, the pigment and the filler can be uniformly dispersed in a water phase system, and meanwhile the coating has excellent rust resistance, film formation performance, chemical resistance and impactresistance.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a water-based one-component, bottom-surface-in-one coating, a preparation method and application thereof. Background technique [0002] Coatings for drinking water tanks include solvent-based, high-solid and solvent-free epoxy coatings. After solvent-based coatings are dried and cured in a closed environment, the solvent in the paint film is difficult to evaporate completely, which not only affects the protective service life of the coating, but also It will cause secondary pollution to fresh water. Under the general situation of energy saving, emission reduction and green environmental protection, high solid coatings are the general trend, and are gradually developing towards solvent-free coatings. In addition, there are two main types of traditional anti-corrosion coating systems, which are primer + primer + top coat composite anti-corrosion coating system or primer + top coat composit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D151/00C09D5/08C09D7/61C09D7/62C09D7/63C09D7/65
Inventor 邱小军程华云徐志新李金钟
Owner ASIA PAINT SHANGHAI