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Two-component waterborne epoxy zinc-rich primer and preparation method thereof

A water-based epoxy zinc-rich, water-based epoxy technology, applied in the direction of epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of brittle coating film and slow drying speed, achieve good adhesion and prevent zinc dust Precipitation, high anti-corrosion effect

Pending Publication Date: 2019-04-05
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, one of the traditional water-based epoxy coatings uses 3-component packaging, and the other uses two-component packaging. The epoxy resin of water-based epoxy coatings uses small molecule E51 liquid epoxy resin, which will cause slow drying and poor coating. brittle disadvantage

Method used

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  • Two-component waterborne epoxy zinc-rich primer and preparation method thereof
  • Two-component waterborne epoxy zinc-rich primer and preparation method thereof
  • Two-component waterborne epoxy zinc-rich primer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Based on the production of 100kg, the mass fraction of zinc powder in the dry film of the two-component water-based epoxy zinc-rich primer after drying and film formation is 80%; Table 1 is the parts by weight of each component of the present invention.

[0039] Table 1

[0040]

[0041] In Table 1, part of the zinc powder can be replaced with mica iron oxide according to the needs of different content in the paint film after the zinc powder is dried into a film, as listed in Example 2 and Example 3; BECKOPOX EH 2150 water-based epoxy The curing agent can be replaced by other water-based epoxy curing agents, such as EPIKURETM 8538 water-based epoxy curing agent of HEXION Co., Ltd., as listed in Example 4 and Example 5; EP387 water-based epoxy resin emulsion can be replaced by other water-based Epoxy resin emulsion, such as the EP6520 water-based epoxy resin emulsion of HEXION company, etc., as listed in embodiment 6; 400 order zinc powder can be replaced with zinc po...

Embodiment 2

[0055]Based on the production of 100kg, the mass fraction of zinc powder in the dry film after the two-component water-based epoxy zinc-rich primer is dried and formed is 70%; Table 2 is the parts by weight of each component of the present invention.

[0056] Table 2

[0057]

[0058]

[0059] A preparation method of two-component waterborne epoxy zinc-rich primer, comprising the following steps:

[0060] The preparation method of A component is as follows:

[0061] 1) First, accurately weigh the propylene glycol methyl ether and the water-based epoxy curing agent and add them into the stirring tank, and stir slowly at a stirring speed of 600 rpm.

[0062] 2) Accurately weigh the organic bentonite, and slowly add it into the stirring tank during the stirring process.

[0063] 3) After the addition, stir rapidly for 30 minutes to stir evenly, and the stirring speed is 2000 rpm.

[0064] 4) Accurately weigh the auxiliary agent, add it slowly during the stirring process,...

Embodiment 3

[0072] Based on the production of 100kg, the mass fraction of zinc powder in the dry film after the two-component water-based epoxy zinc-rich primer is dried and formed is 60%; Table 3 is the parts by weight of each component of the present invention.

[0073] table 3

[0074]

[0075]

[0076] A preparation method of two-component waterborne epoxy zinc-rich primer, comprising the following steps:

[0077] The preparation method of A component is as follows:

[0078] 1) First, accurately weigh the propylene glycol methyl ether and the water-based epoxy curing agent and add them into the stirring tank, and stir slowly at a stirring speed of 600 rpm.

[0079] 2) Accurately weigh the organic bentonite, and slowly add it into the stirring tank during the stirring process.

[0080] 3) After the addition, stir rapidly for 30 minutes to stir evenly, and the stirring speed is 2000 rpm.

[0081] 4) Accurately weigh the auxiliary agent, add it slowly during the stirring process...

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Abstract

The invention discloses a two-component waterborne epoxy zinc-rich primer which is prepared from a component A and a component B. The component A is prepared from, by weight, 4-8 parts of waterborne epoxy curing agents, 4-8 parts of propylene glycol monomethyl ether, 60-90 parts of anti-rust pigments, 0.5-2 parts of organic bentonite, 0.1-2 parts of auxiliaries and 0-25 parts of pigments and fillers. The component B is prepared from, by weight, 90-100 parts of waterborne epoxy resin emulsion, 0.01-1 part of first auxiliaries and 0.01-1 part of second auxiliaries. When the prepared two-component waterborne epoxy zinc-rich primer is in construction, water is used as a diluting solvent, construction is facilitated, environmental pollution is avoided, the primer is healthy and harmless to operators, operation time is saved, construction methods such as spraying and brush coating can be adopted, and the primer is high in paint film drying speed, good in adhesive force, high in mechanical strength and excellent in anti-corrosion performance and can be applied to fields with high anti-corrosion requirements such as the heavy-duty anti-corrosion fields of ships, bridges and the like.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, and in particular relates to a two-component waterborne epoxy zinc-rich primer and a preparation method thereof, which are suitable for heavy anticorrosion fields, such as containers and ships. Background technique [0002] Water-based coatings have become the top priority of inventions by major companies in recent years because they can greatly reduce VOC gas emissions and reduce air pollution. [0003] Two-component water-based epoxy zinc-rich primer, due to the high density of zinc powder, it is easy to precipitate and reacts with water. It is difficult to put zinc powder in the resin to make a two-component water-based epoxy zinc-rich primer. In addition, one of the traditional water-based epoxy coatings uses 3-component packaging, and the other uses two-component packaging. The epoxy resin of water-based epoxy coatings uses small molecule E51 liquid epoxy resin, which will cause sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/45C09D7/61C09D7/63
CPCC08K2003/0893C09D5/106C09D163/00C09D7/45C09D7/61C09D7/63C08K13/06C08K3/08C08K9/00C08K3/346
Inventor 徐俊王位秦玉猛
Owner NIPPON PAINT IND COATINGS SHANGHAI
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