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A kind of preparation method of modified raw lacquer anticorrosion coating

A technology of anti-corrosion coatings and non-toxic lacquers, which is applied in the field of chemical modification of coatings to achieve low production costs, good corrosion resistance, and good film-forming properties.

Active Publication Date: 2018-06-19
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no useful nano-TiO 2 A report on the preparation of anti-corrosion coatings by modifying raw lacquer with hydroxychloropropyl acrylate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of modified raw lacquer anticorrosion coating

[0025] After mixing 150 g of refined lacquer with 850 g of hydroxychloropropyl acrylate, stir and react with a magnetic stirrer at 800 rpm for 5 hours to obtain 1 kg of hydroxychloropropyl acrylate copolymer of lacquer; weigh 10 g of silane coupling agent KH550 with 1000 mL of anhydrous Make a 1% solution with ethanol, and then add nano-TiO 2 100g, adjust the pH value to 5, disperse with ultrasonic waves for 60min, filter, and dry to obtain nano-TiO modified by silane coupling agent 2 Powder 110g; take modified nano-TiO 2 Add 30 g of the powder into 1 kg of raw lacquer hydroxychloropropyl acrylate copolymer, stir and react for 60 minutes with a magnetic stirrer with a rotation speed of 800 rpm, and obtain a modified raw lacquer anti-corrosion coating. The various indicators of its film-forming and anti-corrosion properties are: drying time 22 hours, adhesion level 3-4, impact resistance level 50 kg / cm, hardne...

Embodiment 2

[0027] Preparation of modified raw lacquer anticorrosion coating

[0028] After mixing 200 g of refined lacquer with 800 g of hydroxychloropropyl acrylate, stir and react with a magnetic stirrer with a rotating speed of 1000 rpm for 6 hours, 1 kg of hydroxychloropropyl acrylate copolymer of lacquer was obtained; Make a 1% solution with ethanol, and then add nano-TiO 2 150g, adjust the pH value to 6, disperse with ultrasonic waves for 70min, filter, and dry to obtain nano-TiO modified by silane coupling agent 2 Powder 160g; take modified nano-TiO 2 Add 40 g of the powder into 1 kg of raw lacquer hydroxychloropropyl acrylate copolymer, stir and react for 70 minutes with a magnetic stirrer whose rotation speed is 1000 rpm, and obtain the modified raw lacquer anticorrosion coating. The various indicators of its film-forming and anti-corrosion performance are: drying time is 23 hours, adhesion level is 3-4, impact resistance level is 55 kg / cm, hardness is 2H level, alkali resista...

Embodiment 3

[0030] Preparation of modified raw lacquer anticorrosion coating

[0031] After mixing 250 g of refined lacquer with 750 g of hydroxychloropropyl acrylate, stir and react with a magnetic stirrer at 1200 rpm for 7 hours to obtain 1 kg of hydroxychloropropyl acrylate copolymer of lacquer; weigh 10 g of silane coupling agent KH550 with 500 mL of anhydrous Make a 2% solution with ethanol, and then add nano-TiO 2100g, adjust the pH value to 7, disperse with ultrasonic waves for 60min, filter, and dry to obtain nano-TiO modified by silane coupling agent 2 Powder 110g; take modified nano-TiO 2 Add 50 g of the powder into 1 kg of raw lacquer hydroxychloropropyl acrylate copolymer, stir and react for 90 minutes with a magnetic stirrer with a rotation speed of 1200 rpm, and obtain a modified raw lacquer anti-corrosion coating. The various indicators of its film-forming and anti-corrosion properties are: drying time is 24 hours, adhesion level is 3-4, impact resistance level is 60 kg / c...

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Abstract

The invention relates to a preparation method of modified anticorrosive raw lacquer paint. At the normal temperature, refined raw lacquer and hydroxychloropropyl acrylate are mixed in proportion, stirred and subjected to a reaction for 5-8 h, and a raw lacquer hydroxychloropropyl acrylate copolymer is obtained; a certain quantity of silane coupling agents are taken, absolute ethyl alcohol is added to the silane coupling agents, a 1%-2% solution is prepared, then, nano TiO2 is added in proportion, the range of the PH value is adjusted to be 4-7, filtration and drying are performed after ultrasonic dispersion is performed for 60-90 min, and silane coupling agent modified nano TiO2 powder is obtained; the obtained silane coupling agent modified nano TiO2 powder is added to the raw lacquer hydroxychloropropyl acrylate copolymer in proportion, stirred and subjected to a reaction for 60-90 min, and the modified anticorrosive raw lacquer paint is obtained. The anticorrosive raw lacquer paint prepared with the technology has very good film forming and corrosion resistance, the performance indexes exceed the national standard, the method is environment-friendly, the process is simple to operate, the production cost is low, and the preparation method can become a new technology for producing the modified anticorrosive raw lacquer paint in the industry.

Description

technical field [0001] The invention belongs to the field of chemical modification treatment of coatings, in particular to a preparation method of modified raw lacquer anticorrosion coatings. Background technique [0002] Raw lacquer is the secretion of lacquer tree, which is the only natural green paint in the world that can be catalyzed by biological enzymes to form a film at room temperature. The paint film of raw lacquer is hard and bright, and has good properties such as corrosion resistance, abrasion resistance, acid resistance, solvent resistance, heat resistance, water insulation and good insulation. It is a high-quality coating for military industry, industrial equipment, basic construction, handicrafts and civilian furniture, and is also one of the important materials for traditional export in my country. However, due to the large amount of urushiol contained in raw lacquer, there are some disadvantages in raw lacquer, such as serious allergic toxicity to the human...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/00C09D7/62C09D5/08C08F289/00C08F220/28
CPCC08F289/00C08K3/22C08K9/06C08K2003/2241C08K2201/011C08L2201/08C09D5/08C09D7/62C09D151/00C08F220/281
Inventor 王成章周昊
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY