Water-based rust conversion priming paint and preparation method

A technology of rust conversion and rust conversion agent, which is applied in coatings, anti-corrosion coatings, etc., can solve the problem of destroying the integrity of the conversion film, and achieve the effects of strong resistance to salt spray penetration, good coating quality, and strong permeability

Inactive Publication Date: 2017-08-11
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitric oxide formed by the reduction of nitrate used in the formula tends to form cavities on the conversion film, destroying the integrity of the conversion film

Method used

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  • Water-based rust conversion priming paint and preparation method
  • Water-based rust conversion priming paint and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A water-based rust conversion primer, by weight, consists of 48 parts of vinylidene chloride composite polymer emulsion, 30 parts of pigment paste, 12 parts of 2-hydroxypropyl 3,4,5-trihydroxybenzoic acid rust conversion agent , 0.05-0.1 part of defoamer, 0.1-0.5 part of thickener.

[0041] Its preparation steps are: 1) synthetic rust conversion agent: add 30.6g 1-2 propanediol in four-neck flask and place in cold water bath, add 10.2g gallic acid and 1.02g p-toluenesulfonic acid in proportion under stirring condition, water bath Raise the temperature to 70°C, stir and react for about 1 hour. After the solid matter is completely dissolved, the system turns light yellow; raise the temperature of the system to 105°C, maintain a constant temperature, stir with a stirrer for 2.5-3 hours, cool down and discharge to obtain the rust conversion agent.

[0042] 2) Add 25.0g deionized water into the beaker, add 9.0g aluminum tripolyphosphate, 12.0g talcum powder, 2.0g barium sulf...

Embodiment 2

[0044] A water-based rust conversion primer, by weight, consists of 45 parts of vinylidene chloride composite polymer emulsion, 25 parts of pigment paste, 10 parts of 2-hydroxypropyl 3,4,5-trihydroxybenzoic acid rust conversion agent , 0.05-0.1 part of defoamer, 0.1-0.5 part of thickener.

[0045] Its preparation steps are: 1) Synthetic rust conversion agent: add 27g 1-2 propylene glycol in four-necked flask and place in cold water bath, add 6.75g gallic acid and 0.7g p-toluenesulfonic acid in proportion under stirring condition, water bath temperature Raise to 75°C, stir and react for about 1 hour. After the solid matter is completely dissolved, the system turns light yellow; raise the temperature of the system to 110°C, maintain a constant temperature, stir with a stirrer for 2.5-3 hours, cool down to room temperature and discharge to obtain the rust conversion agent.

[0046] 2) Add 20.0g deionized water into the beaker, add 9.0g aluminum tripolyphosphate, 10.0g talcum powd...

Embodiment 3

[0048] Step 1) is the same as Example 2, step 2): add 25.0g deionized water in a beaker, add 6.0g aluminum tripolyphosphate, 8.0g talcum powder, 10.0g barium sulfate and 4g nano silicon dioxide successively under stirring, After uniform dispersion, it is ground on the equipment until the particle size is less than 20 microns, and the resulting pigment paste is obtained. Add 55.0g of vinylidene chloride composite polymer emulsion into the beaker, and stir evenly; add the above-mentioned pigment and filler slurry into the emulsion, stir for about 15 minutes, add 10g of the rust converting agent prepared in Example 1, and check the bubbles during stirring Add an appropriate amount of defoamer, add an appropriate amount of thickener to thicken, and stir for 30 minutes. A water-based rust conversion primer that can be painted with rust is obtained.

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Abstract

The invention belongs to the technical field of metal anticorrosive coatings and relates to a water-based rust conversion priming paint and a preparation method. The water-based rust conversion priming paint comprises the components of, by weight, 30-60 parts of vinylidene chloride compound macromolecule emulsion, 20-40 parts of color filling slurry, 5-15 parts of 2-hydroxyl propyl-3,4,5-trihydroxybenzoic acid rust conversion agent, 0.05-0.1 part of antifoaming agent and 0.1-0.5 part of thickening agent. The rust conversion agent is good in water resistance, high in stability and excellent in matching with water-based and oil-based paints, and the workability, the conversion efficiency and the corrosion resistance are all relatively high.

Description

technical field [0001] The invention belongs to the technical field of metal anticorrosion coatings, and specifically relates to a rust conversion agent and a preparation method, a water-based rust conversion primer and a preparation method. Background technique [0002] Corrosion is everywhere and everywhere. According to statistics, the economic loss caused by corrosion in my country is 3% to 5% of the GDP of the year. In 2012, the loss caused by corrosion in my country was 2 trillion to 2.5 trillion yuan. According to the calculation of the consumption of 1 ton of standard coal per 10,000 yuan of GDP, the energy loss caused by corrosion is about 200 million tons of standard coal. In addition, at present, about 2 / 3 of the pressure vessel explosion accidents and more than 90% of the various underground pipeline ruptures in China are caused by corrosion; In the accident, corrosion was also an important reason; the collapse of the Missouri Interstate Bridge in the United Stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/08C09D5/08C09D7/12
CPCC09D127/08C08K3/30C08K3/32C08K3/34C08K3/36C08K5/053C08K5/13C08K13/02C08K2003/3045C08K2003/327C08K2201/011C09D5/08C09D7/61C09D7/63
Inventor 葛圣松李建峰王俊祥张绘新邵谦
Owner SHANDONG UNIV OF SCI & TECH
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