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A kind of epoxy zinc-rich primer and preparation method thereof

A technology of epoxy zinc-rich primer and water-based epoxy resin, which is applied in the field of coatings, can solve problems such as uneven mixing and dispersion of zinc powder, reduction of paint film anti-corrosion performance, and influence of paint film appearance, so as to improve construction technology and curing performance Excellent, strong adhesion effect

Active Publication Date: 2021-08-10
上海瀚岱化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of this water-based epoxy zinc-rich primer is inconvenient, which may cause uneven mixing and dispersion of zinc powder, which will affect the appearance of the paint film, thereby reducing the anti-corrosion performance of the paint film

Method used

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  • A kind of epoxy zinc-rich primer and preparation method thereof
  • A kind of epoxy zinc-rich primer and preparation method thereof
  • A kind of epoxy zinc-rich primer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An epoxy zinc-rich primer, each component and its corresponding parts by weight are shown in Table 1.

preparation Embodiment 1

[0043] The preparation method of a kind of epoxy zinc-rich primer of preparation embodiment 1 may further comprise the steps:

[0044] Step 1, prepare the curing agent in component A (HDH6119-WB curing agent produced by our company): mix 0.8g polyamide resin 140, 0.2g surfactant, and 1g deionized water evenly to obtain HDH6119-WB curing agent agent, spare;

[0045] Step 2, prepare the water-based epoxy resin in component B (HDE8117-WB epoxy water-based dispersion produced by our company):

[0046]Mix 5.4g of epoxy resin DER331, 1g of surfactant, and 3.6g of deionized water evenly to obtain HDE8117-WB water-based epoxy resin for later use;

[0047] Step three, prepare component A:

[0048] Add HDH6119-WB curing agent 2g, 0.4g HT-C919 rheology agent, 0.2g RHEOBYK-410 rheology agent, 0.1g BYK-012 defoamer prepared in step 1 to 1g ethylene glycol propyl ether, 2g isopropyl In the mixed solvent of alcohol, disperse evenly, add 40g of 800 mesh zinc powder at the stirring speed of...

Embodiment 2～9

[0055] Embodiment 2~9: a kind of epoxy zinc-rich primer, the difference with embodiment 1 is: each component and its corresponding parts by weight are different from embodiment 1, its specific composition and corresponding parts by weight Number is as shown in table 1, and its preparation method is identical with embodiment 1.

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Abstract

The invention discloses an epoxy zinc-rich primer and a preparation method thereof, belonging to the field of coatings. The epoxy zinc-rich primer includes component A and component B, wherein: component A contains the following raw materials in parts by weight : 1~5 parts of ethylene glycol propyl ether, 2~10 parts of curing agent, 0.6~2.5 parts of rheological agent, 0.1~0.8 parts of defoamer, 40~90 parts of zinc powder, 2~10 parts of isopropanol; The component B includes the following raw materials in parts by weight: 10-25 parts of water-based epoxy resin, 0.1-1 part of thickener, and 5-16 parts of water. The invention changes the traditional three-component water-based epoxy zinc-rich primer into two components, improves the construction technology, and disperses the zinc powder in the curing agent, and selects modified bentonite as the rheological agent to disperse the zinc powder Uniform; the present invention uses water-based epoxy resin dispersion as the main base material, and the prepared emulsion has good stability and low VOC content; the epoxy zinc-rich primer of the present invention has good anticorrosion performance, strong adhesion and excellent curing performance.

Description

technical field [0001] The invention belongs to the field of coatings, and more specifically relates to an epoxy zinc-rich primer and a preparation method thereof. Background technique [0002] Metal corrosion pervades all areas of social production, consuming resources and causing huge economic losses. Coating anti-corrosion coatings on metal surfaces to isolate metals from contact with corrosive media is an effective way to prevent metal corrosion. [0003] Zinc-rich primer has a cathodic protection effect on steel substrates due to its rich zinc powder, so it plays an important role in the anticorrosion of steel structures. There are three main types of zinc-rich primers: epoxy zinc-rich primers, alcohol-soluble inorganic zinc-rich primers and water-based inorganic zinc-rich primers. Epoxy zinc-rich primer uses epoxy resin as the base material, polyamide as the curing agent, superfine zinc powder as the main anti-corrosion pigment, and a certain amount of additives are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/62C09D7/80C09D7/20
CPCC08K2003/0893C09D5/106C09D163/00C09D7/20C09D7/62C09D7/80C08K3/08C08K9/00C08K3/346
Inventor 沈君岱沈岳
Owner 上海瀚岱化学有限公司
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