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Waterborne rusty coating for protecting coating of steel-structure work pieces and preparation method thereof

A technology of rusty coatings and steel structures, applied in anti-corrosion coatings, etc., can solve problems such as large environmental pollution, high energy consumption, and unsafety, and achieve the effects of environmental friendliness, good leveling, and low price

Active Publication Date: 2015-05-13
合肥华清高科表面技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But judging from the current situation, most of the existing varieties are oily rusty coatings that use organic matter as solvent or dispersion medium, which is not favored due to environmental pollution, high energy consumption, and unsafety.

Method used

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  • Waterborne rusty coating for protecting coating of steel-structure work pieces and preparation method thereof
  • Waterborne rusty coating for protecting coating of steel-structure work pieces and preparation method thereof
  • Waterborne rusty coating for protecting coating of steel-structure work pieces and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The water-based rust-bearing paint used for coating protection of steel structure workpieces, its raw materials are composed of the following weight ratio:

[0025]

[0026] Among them, the cross-linked styrene-acrylic emulsion adopts commercial grade (solid content is 44%), the conversion agent is selected oxalic acid, the anti-rust pigment is aluminum dihydrogen tripolyphosphate, the film-forming aid is ethylene glycol ether, and the thickener is commercially available. Sales grade.

[0027] The preparation steps are as follows:

[0028] ①. Mix the anti-rust pigment with 80g of water and grind to disperse to a fineness of 20 microns.

[0029] ② Add cross-linked styrene-acrylic emulsion, conversion agent, quinone, tributyl phosphate, film-forming aid, thickener and the rest of water, stir evenly, and pack to obtain the coating protection for steel structure workpieces Water-based rust paint.

Embodiment 2

[0031] The water-based rust-bearing paint used for coating protection of steel structure workpieces, its raw materials are composed of the following weight ratio:

[0032]

[0033]

[0034] Among them, salicylic acid is selected as the conversion agent, zinc yellow is used as the anti-rust pigment, ethylene glycol propyl ether is used as the film-forming aid, and commercially available grade is used as the thickener.

[0035] The preparation steps are as follows:

[0036] ①. Preparation of cross-linked styrene-acrylic emulsion

[0037] With 50g butyl acrylate as soft monomer, 42g styrene as hard monomer, 3g N-methylol acrylamide, 3g acrylic acid as modified component, 2.4g OP-10 as emulsifier, ammonium persulfate as initiator , prepared by semi-continuous emulsion polymerization, the polymerization temperature is 78°C, the polymerization time is 2.5 hours, and the solid content of the obtained cross-linked styrene-acrylic emulsion is 45%.

[0038] ②. Mix the anti-rust ...

Embodiment 3

[0041] The water-based rust-bearing paint used for coating protection of steel structure workpieces, its raw materials are composed of the following weight ratio:

[0042]

[0043]

[0044] Among them, the conversion agent is oxalic acid, the antirust pigment is iron red, the film-forming aid is ethylene glycol ether, and the thickener is commercial grade.

[0045] The preparation steps are as follows:

[0046] ①. Preparation of cross-linked styrene-acrylic emulsion

[0047] With 540g butyl acrylate as soft monomer, 440g styrene as hard monomer, 33g N-methylol acrylamide, 40g acrylic acid as modified component, 23g OP-10 as emulsifier, ammonium persulfate as initiator, It is prepared by semi-continuous emulsion polymerization, the polymerization temperature is 80°C, and the polymerization time is 3 hours. The solid content of the obtained cross-linked styrene-acrylic emulsion is 46%.

[0048] ②. Mix the anti-rust pigment with 120g of water and grind to disperse to a fi...

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Abstract

The invention belongs to the field of anticorrosive protection of coatings of steel structures, and particularly relates to a waterborne rusty coating for protecting the coating of steel-structure work pieces and a preparation method thereof. Antirust pigment is mixed with 8 to 12 parts of water, and ground and dispersed to fineness of 20 to 60 micrometers; and then a cross-linked styrene-acrylate emulsion, a converting agent, a conversion accelerating agent, a defoaming agent, film forming additives, a thickening agent and the balance amount of water are added to the antirust pigment, evenly stirred therewith and packaged. According to the preparation method, the waterborne rusty coating for protecting the coating of the steel-structure of work pieces, which uses the cross-linked styrene-acrylate emulsion as the main film forming agent, is developed on the basis of a film forming mechanism of the cross-linked styrene-acrylate emulsion through screening and compounding main components such as the cross-linked styrene-acrylate emulsion and other film forming additives. A product has the characteristics of no toxicity, harmlessness, no pollution, wide raw material source, low cost, clean production, and the like, and is simple to operate.

Description

technical field [0001] The invention belongs to the field of coating anticorrosion protection for steel structures, and in particular relates to a water-based rusty coating used for coating protection of steel structure workpieces and a preparation method thereof. Background technique [0002] When the paint is applied on the steel surface, the traditional process requires complete rust removal, and even requires the metal substrate to be completely exposed. This is a very arduous task, which not only seriously affects production efficiency, but also has high construction costs, and rust is harmful to human health; and It is impossible to carry out thorough surface treatment on some large metal structures such as bridges, traffic barriers, large machinery and facilities. Therefore just be necessary to develop a kind of novel paint that can directly paint the surface of corroded iron and steel---rust anti-rust paint with rust. [0003] The anti-rust paint with rust can not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D125/14C09D5/08C08F220/18C08F220/58C08F220/06
Inventor 饶丹
Owner 合肥华清高科表面技术股份有限公司
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