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Water-based primer-topcoat synthetic anti-corrosive paint for coating automobile spare parts and preparation method thereof

A technology of spare parts and anti-corrosion paint, which is applied in the field of water-based anti-corrosion paint and its preparation. It can solve the problems of weather resistance, self-drying and anti-corrosion, and achieve good adhesion, energy saving, and good flexibility of the paint film. Effect

Active Publication Date: 2012-06-20
ZHEJIANG TRANSFER PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by this invention is to overcome the defects in the above-mentioned prior art, and to provide a water-based bottom-surface-integrated anti-corrosion paint for the coating of auto parts with a water-based epoxy ester modified acrylic resin as the base material, to solve the existing problems. Problems of poor weather resistance, self-drying and anti-corrosion properties of coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 0.4Kg catalyst DBTO to the mixture of 45Kg epoxy resin E-20, 40Kg linolenic acid and 15Kg crotonic acid, heat to 160±5℃, keep the reaction for two hours, add 5% xylene, and raise the temperature to 220 ±5°C, keep reflux until the acid value is less than 5mgKOH / g, extract xylene, cool down to 80±5°C, add alcohol ether solvent and dilute to obtain epoxy ester prepolymer, set aside.

[0022] Raise the temperature of 35Kg epoxy ester prepolymer to 130±5℃ and slowly add 10Kg methyl methacrylate, 8Kg styrene, 12Kg butyl acrylate, 10Kg 2-ethylhexyl acrylate, 3Kg acrylic acid, 0.4Kg peroxide Benzoyl and 0.2Kg chain transfer agent dodecyl mercaptan, control the rate of addition, dropwise at a constant speed in 1.0 hour. Keep warm for 30 minutes, add 0.1Kg of benzoyl peroxide until the conversion rate reaches over 98%, and the acid value is 50-60 mgKOH / g. Cool down to 50-40°C, neutralize to pH 7.5-8.0 with 0.8Kg dimethylethanolamine, adjust the solid content to 50±2% with de...

Embodiment 2

[0026] Add 0.4Kg catalyst zinc naphthenate to the mixture of 50Kg epoxy resin E-20, 35Kg linolenic acid and 1 Kg crotonic acid, heat to 160±5℃, keep the reaction for two hours, add 5% xylene , heat up to 220±5°C, keep refluxing until the acid value is less than 5mgKOH / g, extract xylene, cool down to 80±5°C, add alcohol ether solvent and dilute to obtain epoxy ester prepolymer, set aside.

[0027] Raise the temperature of 45Kg epoxy ester prepolymer to 130±5℃, slowly add 10 Kg methyl methacrylate, 8Kg styrene, 12 Kg butyl acrylate, 10Kg 2-ethylhexyl acrylate, 3Kg acrylic acid, 0.4 Kg benzoyl peroxide and 0.2Kg chain transfer agent dodecyl mercaptan, control the rate of addition, dropwise at a constant speed in 1.0 hour. Keep warm for 30 minutes, add 0.1Kg of benzoyl peroxide until the conversion rate reaches over 98%, and the acid value is 50-60 mgKOH / g. Cool down to 50-40°C, neutralize to pH 7.5-8.0 with 0.8Kg dimethylethanolamine, adjust the solid content to 50±2% with deion...

Embodiment 3

[0031] Add 0.4 Kg catalyst DBTO to the mixture of 45Kg epoxy resin E-20, 35Kg linolenic acid and 10Kg crotonic acid, heat to 160±5°C, keep the reaction for two hours, add 5% xylene, and raise the temperature to 220 ±5°C, keep reflux until the acid value is less than 5mgKOH / g, extract xylene, cool down to 80±5°C, add alcohol ether solvent and dilute to obtain epoxy ester prepolymer, set aside.

[0032] Raise the temperature of 55Kg epoxy ester prepolymer to 130±5℃, slowly add 10 Kg methyl methacrylate, 8Kg styrene, 12Kg butyl acrylate, 10Kg 2-ethylhexyl acrylate, 5Kg acrylic acid, 0.5Kg Benzoyl peroxide and 0.2Kg chain transfer agent dodecyl mercaptan, control the rate of addition, dropwise at a constant speed in 1.0 hour. Keep warm for 30 minutes, add 0.1Kg of benzoyl peroxide until the conversion rate reaches over 98%, and the acid value is 50-60 mgKOH / g. Cool down to 50-40°C, neutralize to pH 7.5-8.0 with 0.8Kg dimethylethanolamine, adjust the solid content to 50±2% with de...

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Abstract

The invention relates to a water-based primer-topcoat synthetic anti-corrosive paint for coating automobile spare parts and a preparation method thereof. Most of the traditional water-based anti-corrosive paints have the shortcomings of poorer outdoor durability, self-drying performance and anti-corrosive performance. The water-based primer-topcoat synthetic anti-corrosive paint for coating the automobile spare parts comprises the following components in percentage by weight: 39.5-59.5% of water-based epoxy-ester modified acrylic resin, 25-35% of anti-corrosive pigment and filler, 0.15-0.4% of water-based deforming agent, 0.3-0.6% of water-based wetting dispersant, 0.15-0.4 of water-based substrate wetting agent, 5-8% of alcohol ether solvent, 15-20% of water, 0.5-0.8% of water-based drying agent, 1.0-1.5% of anti-corrosive agent, 0.2-0.5% of thickening agent and 0.05-0.2% of organic amine neutralizing agent. The water-based primer-topcoat synthetic anti-corrosive paint provided by the invention can dry by per se under a normal temperature; and the weather resistance property and the non-corrosive property of paint films are good.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a water-based bottom-surface-integrated anticorrosion paint for coating auto parts and a preparation method thereof. Background technique [0002] At present, the coatings for auto parts (such as drive shafts, axles, water tanks, heat sinks, compressors, etc.) The pollution is relatively large, and recycling is limited, resulting in a waste of resources, and at the same time causing harm to people's health, which does not meet the requirements of environmental protection. At present, domestic and foreign research on the application of water-based bottom-surface-in-one coatings has been carried out. The disadvantages of most existing water-based anti-corrosion paints are poor outdoor durability, easy chalking and fading; poor self-drying performance and generally require high temperature baking; anti-corrosion performance Poor, the salt spray performance generally does not reach 240h. Th...

Claims

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Application Information

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IPC IPC(8): C09D151/08C09D5/08C08F290/00
Inventor 刘江涛李彦海范基升陈萍吴勇胡娟
Owner ZHEJIANG TRANSFER PAINT CO LTD
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