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Waterborne rusted paint and preparation method thereof

A water-based technology for rusty coatings, applied in anti-corrosion coatings, coatings, devices for coating liquids on surfaces, etc., can solve problems such as high film-forming temperature and poor storage stability, and achieve low film-forming temperature and water-resistant coating film High durability, storage stability and good film performance

Inactive Publication Date: 2010-02-03
上海奇想青晨新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the disadvantages of high film forming temperature and poor storage stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of ethylene-propylene (vinyl acetate-acrylate) emulsion: 240 parts (by weight, the same below) of distilled water, 1.0 parts of sodium bicarbonate and 2.2 parts of anionic surfactants are added to the reactor, and then the first step monomer That is, 5 parts of butyl acrylate and 35 parts of vinyl acetate are dispersed in the above aqueous solution, the temperature is raised to 70 ° C, and the initiators, namely 0.17 parts of ammonium persulfate and 0.20 parts of sodium bisulfite are added to make them fuse within 30 minutes and keep warm for 20 minutes. Minutes to obtain an emulsion with a particle size of 0.155u and a uniform particle size distribution; Add acrylic acid in about one hour and keep warm for 1 hour to obtain a layered composite polymer emulsion with a particle size of 0.250u, a pH value of 4-5, and a minimum film-forming temperature of 5°C.

[0033] The preparation of water-based rusty paint: put 5.0 parts of conversion agent (tannic acid), 2...

Embodiment 2

[0035] The preparation of ethylene-propylene emulsion is with embodiment 1.

[0036] The preparation of water-based rust coating: put 8.0 parts of conversion agent (gallic acid), 2.0 parts of conversion accelerator (glucinol), 13.0 parts of water, 3.0 parts of film-forming aid (ethylene glycol ether) and 2.5 parts Parts of freeze-thaw stabilizer (ethylene glycol) are mixed together and slightly heated to dissolve completely. While stirring again, the above solution that has been dissolved is added to 65.0 parts of ethylene-propylene emulsion, and then 5.0 parts of thickener (14.2% aqueous solution of sodium polyacrylate) are added while stirring, and finally other additives are added, including 0.5 parts of antifoaming agent (tributyl phosphate) and 1.0 parts of preservative (5% sodium benzoate). It should be noted here that the conversion solution or thickener should not be added to the emulsion at once, so as not to cause the local concentration to be too high and cause the...

Embodiment 3

[0038] The preparation of ethylene-propylene emulsion is with embodiment 1.

[0039] The preparation of water-based rust paint: put 5.0 parts of conversion agent (tannic acid), 4.0 parts of conversion accelerator (catechol), 5.0 parts of water, 1.0 parts of film-forming aid (ethylene glycol ether) Mix with 3.0 parts of freeze-thaw stabilizer (ethylene glycol) and heat slightly to dissolve it completely. While stirring again, the dissolved solution was added to 72.5 parts of ethylene-propylene emulsion, then 8.0 parts of thickener (14.2% aqueous solution of sodium polyacrylate) were added while stirring, and finally other additives were added, including 1.0 parts of antifoaming agent (water-based silicone oil) and 0.5 parts of preservative (5% sodium benzoate). It should be noted here that the conversion solution or thickener should not be added to the emulsion at once, so as not to cause the local concentration to be too high and cause the emulsion to break and gel.

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Abstract

The invention provides waterborne rusted paint, which mainly comprises transforming agent, transformation accelerator, water, film-forming additives, freeze-thaw stabilizer, ethylene-propylene emulsion, thickener, defoamer and preservatives. The invention also provides a method for preparing the waterborne rusted paint. The waterborne rusted paint has the characteristics of low film-forming temperature, good storage stability, good film properties, high film water resistance and the like, and completely meets the antirust protection requirements of the shipbuilding industry, petroleum industry, machinery industry, construction industry and other various industries needing steel antirust protection.

Description

technical field [0001] The invention relates to a water-based rust-carrying coating for iron and steel components and a preparation method thereof. Background technique [0002] In order to protect steel components from rust, paint is often used. In the past, before using paint, the base material must be thoroughly derusted, and the derusting work is very labor-intensive, and for large and complex steel components, it is almost impossible to completely derust. [0003] At present, there is a rust coating, which does not need to be thoroughly derusted before use, and can be directly applied to the rust surface of the steel component, and can also receive the antirust effect. Patent No. 57-18766 and GB2160877 describe an anti-corrosion coating composed of emulsion, film-forming aid, conversion agent, conversion accelerator, freeze-thaw stabilizer, defoamer, tackifier and water. , which is currently a better class of water-based rust coatings. However, it also has the disadv...

Claims

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Application Information

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IPC IPC(8): C09D131/04C09D5/08C09D5/02B05D7/14
Inventor 刘国富赵永旗戚向东
Owner 上海奇想青晨新材料科技股份有限公司
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