Preparation method of anti-cracking unsaturated polyester varnish

A manufacturing method and unsaturated technology, applied in polyester coatings, fireproof coatings, coatings, etc., can solve problems such as easy adhesion of substrates, large shrinkage of paint films, and impact on production efficiency, so as to reduce drying shrinkage , good adhesion, and the effect of preventing cracking

Active Publication Date: 2019-03-26
广东百川化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of unsaturated polyester paint is that the shrinkage rate of the paint film is relatively large during curing, and the adhesion to the substrate is prone to problems. Because the one-time construction is thick, it is easy to crack after drying. Accumulate thick layers of paint, and it is easy to crack after drying, causing rework and affecting production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A manufacturing method of anti-cracking unsaturated polyester paint includes the following steps:

[0021] S1: Preparation of modified filler

[0022] 100ml of toluene dissolved in the particle size 2.0g of nano-magnesium hydroxide powder of <100nm, ultrasonic dispersion treatment for 15min, slowly add 1.8g of 3-bromopropyltrimethoxysilane, stir well, heat in a water bath at 70℃ for 20h, filter to obtain a white precipitate, respectively pass toluene and no Wash with water and ethanol and freeze-dry to obtain white powder A. Weigh 1g white powder A and 0.5g sodium azide, and disperse them in 200ml dimethylformamide. Under nitrogen protection, stir continuously at 70°C for 20h. The precipitate was washed with absolute ethanol and freeze-dried to obtain white powder B. Weigh 10g of lignin acetate, add 120ml of 1mol / L sodium hydroxide solution to fully stir to dissolve, add 10g of bromopropane, and react at 70°C for 3h. After cooling Adjust the pH of the hydrochloric acid solu...

Embodiment 2

[0032] A manufacturing method of anti-cracking unsaturated polyester paint includes the following steps:

[0033] S1: Preparation of modified filler

[0034] 100ml of toluene dissolved in the particle size 2.0g of nano-magnesium hydroxide powder of <100nm, ultrasonic dispersion treatment for 15min, slowly add 1.8g of 3-bromopropyltrimethoxysilane, stir well, heat in a water bath at 70℃ for 20h, filter to obtain a white precipitate, respectively pass toluene and no Wash with water and ethanol and freeze-dry to obtain white powder A. Weigh 1g white powder A and 0.5g sodium azide, and disperse them in 200ml dimethylformamide. Under nitrogen protection, stir continuously at 70°C for 20h. The precipitate was washed with absolute ethanol and freeze-dried to obtain white powder B. Weigh 10g of lignin acetate, add 120ml of 1mol / L sodium hydroxide solution to fully stir to dissolve, add 10g of bromopropane, and react at 70°C for 3h. After cooling Adjust the pH of the hydrochloric acid solu...

Embodiment 3

[0043] A manufacturing method of anti-cracking unsaturated polyester paint includes the following steps:

[0044] S1: Preparation of modified filler

[0045] 100ml of toluene dissolved in the particle size 2.0g of nano-magnesium hydroxide powder of <100nm, ultrasonic dispersion treatment for 15min, slowly add 1.8g of 3-bromopropyltrimethoxysilane, stir well, heat in a water bath at 70℃ for 20h, filter to obtain a white precipitate, respectively pass toluene and no Wash with water and ethanol and freeze-dry to obtain white powder A. Weigh 1g white powder A and 0.5g sodium azide, and disperse them in 200ml dimethylformamide. Under nitrogen protection, stir continuously at 70°C for 20h. The precipitate was washed with absolute ethanol and freeze-dried to obtain white powder B. Weigh 10g of lignin acetate, add 120ml of 1mol / L sodium hydroxide solution to fully stir to dissolve, add 10g of bromopropane, and react at 70°C for 3h. After cooling Adjust the pH of the hydrochloric acid solu...

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PUM

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Abstract

The invention relates to a preparation method of anti-cracking unsaturated polyester varnish. The preparation method comprises the following steps: modified filler preparation, main varnish raw material preparation and proportioning, and weighing and subpackaging. The anti-cracking unsaturated polyester varnish comprises 100 parts of main varnish, 1.5-2.5 parts of an initiator, 1-2 parts of an accelerant and 30-40 parts of a diluent. The main varnish comprises an anti-cracking agent and modified filler. By adding the anti-cracking gent and the modified inorganic filler, the film has a good adhesive force, dryness and cracks induced by construction of thick film are avoided, and the construction efficiency is improved.

Description

Technical field [0001] The invention relates to the field of unsaturated polyester paints, in particular to a method for manufacturing an anti-cracking unsaturated polyester paint. Background technique [0002] Unsaturated polyester coatings, namely UPE coatings, refer to coatings with air-drying unsaturated polyester resin as the main film-forming substance, which can be made into solvent-free paint, with low VOC, high solid content, good fullness and filling effect The paint film has the characteristics of high hardness, aging resistance, corrosion resistance, easy adjustment and easy spraying, a thicker coating can be obtained in one coating, and high construction efficiency. It is suitable for solid wood, plywood and sticker furniture, particleboard, and MDF Furniture can not only increase the hardness of the top coat, but also reduce the amount of top coat. It has high-quality, low-consumption, time-saving, low-pollution, and excellent comprehensive performance unmatched by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D5/18C09D7/62C09D7/61C09D7/63
CPCC08K2003/2224C08K2003/2241C08K2003/265C08K2201/011C09D5/18C09D167/06C09D7/61C09D7/62C09D7/63C08K13/06C08K9/08C08K3/22C08K3/26C08K5/5425
Inventor 黄显明谢永华
Owner 广东百川化工有限公司
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