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Preparation method of scratching-resistant matte varnish

An anti-scratch and topcoat technology, applied in the direction of coating, etc., can solve the problems of shortened service life, easy to be scratched, low transparency, low hardness, etc., and achieve the effect of prolonging service life, stable gloss and good hand feeling

Inactive Publication Date: 2016-12-14
董晓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: in view of the low transparency and hardness of the currently used matte varnish, which is easy to be scratched and shortens its service life, the present invention uses gamma-glycidyl etheroxypropyl trimethoxy Dimethyldiethoxysilane and dimethyldiethoxysilane were used as raw materials to react under acidic conditions to obtain a high-transparency epoxy-modified silicone resin, and then the silicon dioxide was treated with a silane reagent and then grafted with a light stabilizer to obtain Modified silica, after ball milling silicon carbide and talc powder, activated by surfactant to obtain anti-scratch agent, and then mixed with modified silica, epoxy modified silicone resin, etc. at high speed to obtain emulsion, Finally, add additives and stir to get an anti-scratch matte clear topcoat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First, weigh 20g of γ-glycidyl etheroxypropyltrimethoxysilane and add it to a three-neck flask equipped with a thermometer and a reflux device, place the flask in a water bath, raise the temperature to 80°C, and then add 200mL toluene, 30mL mass fraction 20% hydrochloric acid solution, stirred for 20min, then added 10g of dimethyldiethoxysilane, stirred for 4h, then added 200mL of deionized water, stirred for 20min, stood still for 30min, separated, collected the organic phase, and subtracted the organic phase Pressure distilled to 1 / 5 of the original volume to obtain epoxy-modified silicone resin, set aside; then weigh 5g of nano-silica and add it to the beaker, then add 200mL of 75% ethanol solution, and place it in ultrasonic vibration In the instrument, ultrasonic at 200W and 70°C for 20min, then add 3g of γ-methacryloxypropyl trimethoxysilane, ultrasonic for 30min, then add 4g of sebacic acid bis(1,2,2,6,6, -Pentamethylpiperidinol) ester, continue to sonicate for 2...

example 2

[0019] First, weigh 10g of γ-glycidyl etheroxypropyltrimethoxysilane and add it to a three-neck flask equipped with a thermometer and a reflux device, place the flask in a water bath, raise the temperature to 70°C, and then add 100mL toluene, 20mL mass fraction 20% hydrochloric acid solution, stirred for 10in, then added 5g of dimethyldiethoxysilane, stirred for 3h, then added 100mL of deionized water, stirred for 10min, stood for 20min, separated, collected the organic phase, and subtracted the organic phase Pressure distilled to 1 / 5 of the original volume to obtain epoxy-modified silicone resin, set aside; then weigh 3g of nano-silica and add it to the beaker, then add 100mL of 75% ethanol solution, and place in ultrasonic vibration In the instrument, ultrasonic at 180W and 60°C for 10min, then add 1g of γ-methacryloxypropyl trimethoxysilane, ultrasonic for 20min, then add 2g of sebacic acid bis(1,2,2,6,6, -pentamethylpiperidinol) ester, continue to sonicate for 1h to obtain...

example 3

[0022] First, weigh 15g of γ-glycidyl etheroxypropyltrimethoxysilane and add it to a three-necked flask equipped with a thermometer and a reflux device, place the flask in a water bath, raise the temperature to 75°C, and then add 150mL toluene, 25mL mass fraction 20% hydrochloric acid solution, stirred for 15 minutes, then added 7 g of dimethyldiethoxysilane, stirred for 3 hours, then added 150 mL of deionized water, stirred for 15 minutes, stood for 25 minutes, separated, collected the organic phase, and subtracted the organic phase pressure distillation to 1 / 5 of the original volume to obtain epoxy-modified silicone resin, and set aside; then weigh 4g of nano-silica and add it to the beaker, then add 150mL of 75% ethanol solution, and place it in ultrasonic vibration In the instrument, ultrasonic at 190W and 65°C for 15min, then add 2g of γ-methacryloxypropyl trimethoxysilane, ultrasonic for 25min, then add 3g of sebacic acid bis(1,2,2,6,6, -Pentamethylpiperidinol) ester, co...

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Abstract

The invention relates to a preparation method of scratching-resistant matte varnish, and belongs to the technical field of paint preparation. The preparation method comprises the steps that gamma-glycidoxy propyl trimethoxy silane and diethoxydimethylsilane serve as the raw materials, a reaction is conducted under the acidic condition, and highly transparent epoxy-modified organic silicone resin is obtained; silicon dioxide is treated with a silane agent, treated silicon dioxide and a light stabilizer are subjected to a grafting reaction, and modified silicon dioxide is obtained; silicon carbide and talcum powder are subjected to ball milling and then activated through a surfactant, and a scratching-resistant agent is obtained; the scratching-resistant agent, modified silicon dioxide, epoxy-modified organic silicone resin and the like are subjected to high-speed stirring, and an emulsion is obtained; auxiliaries are added for stirring finally, and the scratching-resistant matte varnish is obtained. The scratching-resistant matte varnish prepared through the preparation method is high in hardness which is not smaller than 2 HB and not prone to be scratched, and the service life of the scratching-resistant matte varnish is greatly prolonged; the glossiness is kept to range from 4 gloss to 6 gloss, the glossiness is stable, the hand feeling is good, and the scratching-resistant matte varnish is suitable for the field of solid wood furniture decoration.

Description

technical field [0001] The invention relates to a preparation method of an anti-scratch matte varnish, belonging to the technical field of paint preparation. Background technique [0002] In recent years, my country's coating industry is in the ascendant, and the total output of coatings has also leapt to the forefront of the world, forming a related industrial group, actively promoting the technological revolution and development of the traditional coating field. During this period, high gloss The high-gloss paint is deeply loved by consumers for its bright color and brightness, and has dominated the paint market for a long time. However, with the continuous improvement of people's living standards, on the one hand, consumers feel that the reflection of high-gloss bright paint is more serious after film formation, which is harmful to people's eyes; on the other hand, consumers' aesthetic concepts are more and more inclined to leisure, Fashion and personalization, so the dem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D7/12
CPCC09D183/06C08K2201/014C08L2201/10C08L2205/03C08L83/04C08L1/286C08K13/06C08K9/06C08K3/36C08K3/34C08K5/103C08K5/098
Inventor 董晓薛荣飞孟中立
Owner 董晓
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