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Acrylic polyurethane hot-dip galvanized substrate coating and preparation method thereof

An acrylic polyurethane and substrate coating technology, applied in the coating field, can solve the problems of poor adhesion, poor resistance to humidity and heat, affecting the construction of the next paint, difficult adhesion, etc., and achieves good film compactness and excellent resistance to boiling water. The effect of cookability and excellent adhesion strength

Active Publication Date: 2011-12-21
SUZHOU JIREN HIGH TECH MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]It is difficult to apply paint on galvanized substrates due to the problem of adhesion. Traditionally, the paint variety used on hot-dip galvanized substrates in China is ring Oxygen micaceous iron primer, but the epoxy micaceous iron primer has the following defects: ① poor adhesion, resistance to heat and humidity, and often causes blistering and shedding in harsh environments such as coastal areas; ② slow drying, especially in severe cold in winter Under weather conditions, it will affect the construction of the next paint

Method used

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  • Acrylic polyurethane hot-dip galvanized substrate coating and preparation method thereof
  • Acrylic polyurethane hot-dip galvanized substrate coating and preparation method thereof
  • Acrylic polyurethane hot-dip galvanized substrate coating and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0027] An acrylic primer for mica iron hot dip galvanizing.

[0028] Group A distribution table:

[0029] Table 1 Distribution ratio of group A

[0030]

[0031] like figure 1 The preparation method of shown A component comprises the following steps:

[0032] Firstly, put anhydrous butyl acetate (above 99.9%), low molecular weight polyol polymer TP, trimethylolpropane (TMP) and 1 / 2 phosphoric acid into the reaction kettle, stir and heat up. When the temperature rises to 60-65°C and TMP is completely dissolved, put in MDI and TDI, keep the temperature at 70-75°C for 4-5 hours, take samples to measure the NCO% content and free TDI% content, and put in the solvent anhydrous xylene after reaching the standard , cooled to below 50°C, filtered, packaged, and sealed for storage.

[0033] Group B distribution table:

[0034] Table 2 Distribution ratio of group B

[0035]

[0036] Above-mentioned preparation method comprises the following steps: Resin and additives are m...

example 2

[0039] A light gray acrylic polyurethane hot-dip galvanized substrate all-in-one coating

[0040] The distribution ratio and preparation method of group A are the same as in Example 1.

[0041] The allocation ratio of group B is shown in Table 3.

[0042] Table 3 Proportion of a light gray acrylic polyurethane hot-dip galvanized substrate bottom-surface-integrated coating

[0043]

[0044] like figure 2 The preparation method shown includes the following steps: Resin and additives are mixed and dissolved: (1) Add epoxy-modified hydroxyacrylic resin, fumed silica, hyperdispersant, mixed solvent of xylene, butyl acetate, and ethyl lactate in sequence. Start the mixer, and stir at medium and low speed (500~800r / min) for about 20~30 minutes to fully dissolve and mix. High speed pre-dispersion : (2) Add titanium dioxide, iron red powder, high-pigment carbon black and phthalocyanine blue sequentially while dispersing at medium speed (500~800r / min) in (1). Continue to dis...

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Abstract

The invention discloses acrylic polyurethane hot galvanizing substrate paint and a preparation method thereof. The acrylic polyurethane hot galvanizing substrate paint is characterized by comprising an ingredient A and an ingredient B, wherein the ingredient A comprises epoxy modified hydroxyl acrylic resin, aerosil, organic bentonite or polyamide wax powder, hyper dispersants, xylol-butyl acetate-ethylene glycol methyl ether acetate mixed solvents, non-floating type aluminum silver paste and mica iron oxide pigment, coloring pigment, fluorine modified acrylic flowing agents, driers, organic siloxane adherence promoters and industrial alcohol, the ingredient B comprises low-molecular-weight polyalcohol polymers (TP hydroxyl value 500), trimethylolpropane (TMP), toluene diisocynate (TDI) and 4, 4'-diphenylmethane diisocyanate (MDI), and mixed solvents of xylol and butyl aetate are used as addition product carriers. The prepared products have excellent adhesive strength on hot galvanizing substrates.

Description

technical field [0001] The invention relates to a coating, in particular to a hot-dip galvanized substrate anticorrosion coating with good chemical anticorrosion and excellent adhesion strength. Background technique [0002] Hot-dip galvanizing (galvanizing) is also called hot-dip galvanizing and hot-dip galvanizing: it is an effective metal anti-corrosion method, mainly used in metal structure facilities in various industries. It is to immerse the rust-removed steel parts in the molten zinc at about 500 ℃, so that the surface of the steel parts will be attached with a zinc layer, so as to achieve the purpose of anti-corrosion. Hot-dip galvanizing is developed from the older hot-dip galvanizing method. Since 1836, when hot-dip galvanizing was applied to industry in France, it has a history of 140 years. However, the hot-dip galvanizing industry has developed on a large scale with the rapid development of cold-rolled strip steel in the past three decades. [0003] A hot-dip...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C09D5/08
Inventor 王宇晖张鑫麻富忠
Owner SUZHOU JIREN HIGH TECH MATERIAL CO LTD
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