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Watery zinc-aluminium heavy-duty coating in compounding squama shape and preparation method thereof

A scale-like zinc and water-based coating technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of porosity and poor flexibility, and achieve the effects of improved acid resistance, improved bonding strength, and firm bonding

Inactive Publication Date: 2009-09-09
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the actual development and application status of water-based inorganic zinc-rich coatings, it is found that silicate-based materials can be used as coating binders to achieve excellent corrosion resistance, wear resistance and high temperature resistance of coatings; however, their poor flexibility, Porosity and other shortcomings can also be modified by various methods to prepare inorganic-organic composite binders and improve coating performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 The preparation method of water-based composite scaly zinc-aluminum heavy-duty anti-corrosion coating

[0027] (1). Preparation of organic-inorganic composite modified base material, weigh 62.31% of silica sol, 3.6% of potassium hydroxide, and 21.0% of distilled water in a three-necked flask by weight percentage, stir at a constant temperature of 60°C for 10min, and then Mix with 12% silicone acrylic emulsion, stir for 40 minutes, add 0.6% dodecyl alcohol ester, 0.1% organic silicon defoamer and 0.4% sodium polycarboxylate type copolymer sodium salt dispersant, and fully stir for 60 minutes , after standing for 2h, a milky white uniformly dispersed modified base material is obtained;

[0028] (2). Preparation of paint: weigh 70.0% of flaky zinc powder and 30.0% of flaky aluminum powder, after mixing evenly, weigh a certain amount of pigment and organic-inorganic composite modified base material according to the weight ratio of 1:5 , slowly add the pigment ...

Embodiment 2

[0030] Embodiment 2 The preparation method of water-based composite scaly zinc-aluminum heavy-duty anticorrosion coating

[0031] (1). The preparation of organic-inorganic composite modified base material, weigh 63.7% of silica sol, 4.5% of potassium hydroxide, and 16.0% of distilled water in a three-necked flask by weight percentage, in a 329k constant temperature water bath at 60°C, Electric stirring for 10 minutes, then mixed with 14.5% silicone acrylic emulsion, electric stirring for 30 minutes, adding 0.7% dodecyl alcohol ester, 0.1% silicone defoamer and 0.5% sodium polycarboxylate type copolymer For salt dispersant, fully stir for 60 minutes and let it stand for 2 hours to obtain a uniformly dispersed milky white silicon-acrylic emulsion modified base material;

[0032] (2). Preparation of coating: take 75.0% of the scaly zinc powder and 25.0% of the scaly aluminum powder, after mixing evenly, weigh a certain amount of pigment and organic-inorganic composite water-based...

Embodiment 3

[0034] Embodiment 3 The preparation method of water-based composite scaly zinc-aluminum heavy-duty anti-corrosion coating

[0035] (1). Preparation of organic-inorganic composite modified base material. Weigh 66.5% of silica sol, 5.3% of potassium hydroxide, and 10% of distilled water in a three-necked flask by weight percentage. At a constant temperature of 60°C, electric Stir for 10 minutes, then mix with 16.2% silicone acrylic emulsion, electric stirring for 30 minutes, add 1.0% dodecyl alcohol ester, 0.20% silicone defoamer and 0.8% sodium polycarboxylate copolymer sodium salt Powder, fully stirred for 60 minutes, and stood still for 2 hours to obtain a uniformly dispersed milky white silicon-acrylic emulsion modified base material.

[0036] (2). Preparation of paint: weigh 80.0% of scaly zinc powder and 20.0% of scaly aluminum powder, after mixing evenly, weigh a certain amount of pigment and organic-inorganic composite modified base material according to the weight ratio...

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Abstract

The invention relates to a watery zinc-aluminium heavy-duty coating in a compounding squama shape and a preparation method thereof. The watery zinc-aluminium heavy-duty coating belongs to a bi-component coating and is prepared from organic-inorganic modified base stock and pigment according to a certain proportion by weight, wherein the organic-inorganic modified base stock contains silica sol, potassium hydroxide, silicone-acrylate emulsion, a pigment dispersing agent, a film forming addition agent and an antifoaming agent, and the balance is deionized water or distilled water; the pigment comprises squama-shaped zinc powder and squama-shaped aluminium powder; and the weight ratio of the organic-inorganic modified base stock to the pigment is 5: 1-2. The watery zinc-aluminium heavy-duty coating contains no chrome, can be solidified at the normal temperature, has environmental protection and low energy consumption and can be used for preparing thin coatings with high corrosion resistance, and the like.

Description

1. Technical field [0001] The invention relates to the technology of green anti-corrosion paint for metal surfaces, in particular to a water-based composite scaly zinc-aluminum heavy-duty anti-corrosion paint and a preparation method thereof. 2. Background technology [0002] In the early 1970s, the United States developed a flaky zinc-based chromium salt protective coating technology, that is, Dacromet technology. This coating is a combination of flaky zinc powder and aluminum powder, chromic anhydride, wetting agent, dispersion It is made by stirring the mixture composed of agent, reducing agent, deionized water and other additives evenly, then coating on the workpiece surface, and then curing at 300°C. Compared with spherical powder, flaky zinc powder is arranged in parallel and overlapping in the coating film, which greatly reduces the penetration of water and corrosive media in the coating film. The amount of flaky zinc powder with the same coating area and anti-corrosi...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D183/04C09D7/12
Inventor 马爱斌张留艳江静华
Owner HOHAI UNIV
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