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A kind of highly scratch-resistant two-component nano-modified acrylic varnish and its preparation method

A technology of acrylic varnish and nano-modification, which is applied in coatings, polyurea/polyurethane coatings, etc., and can solve problems such as unknown, no explanation for the improvement of scratch resistance, and reduced brightness changes at scratches.

Active Publication Date: 2018-11-27
HUNAN JINHAI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention patent with application number 201510143452.X provides a preparation method of SiC nano powder modified wear-resistant and impact-resistant art paint, which effectively improves the strength, hardness and toughness of the paint film, but does not affect the resistance of the modified paint film. Scratch resistance is explained, and it is unknown whether it can be applied to automotive interior plastic parts coatings; the invention patent application number 201410431274.6 discloses a scratch-resistant automotive coating, the formula is composed of polypropylene resin, polyurethane acrylate, polyurethane, carbonic acid Calcium, silica, polysiloxane, erucamide hydroxyl, hydroxyethyl cellulose, pigments, inorganic fillers, compared with the control group without polypropylene resin, polysiloxane, and hydroxyethyl cellulose, The brightness change at the scratches is significantly reduced, and the surface scratches are smooth, indicating that its scratch resistance performance has been significantly improved, but the invention patent has not tested other properties of the paint film, and the increase in scratch resistance performance is not no explanation given

Method used

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  • A kind of highly scratch-resistant two-component nano-modified acrylic varnish and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In a clean and standard container, weigh 15 parts of acrylic resin a (solid content 70%, acid value 6mgKOH / g, hydroxyl content 4.2%), acrylic resin b (solid content 50%, acid value 3mgKOH / g, hydroxyl Content 2.0%) 20 parts, acrylic resin c (solid content 70%, acid value 9mgKOH / g, hydroxyl content 2.24%) 22 parts, nano silicon dioxide 20 parts and 6 parts propylene glycol methyl ether acetate, start the disperser, in Stir at a medium speed at a speed of 700r / min and disperse evenly for 5 minutes to obtain a pre-dispersed resin; then add 5 parts of xylene, 9.5 parts of 100 # Solvent oil, 0.3 parts of substrate wetting agent, 0.5 parts of leveling agent, 1.1 parts of ultraviolet absorber, 0.6 parts of light stabilizer, stir and disperse at a medium speed at a speed of 800r / min for 1 hour to obtain component A; group B One part needs to be obtained by adding 70 parts of HDI trimer curing agent and 30 parts of dehydrated n-butyl acetate into a clean container, stirring until...

Embodiment 2

[0015] In a clean and standard container, weigh 16 parts of acrylic resin a (solid content 70%, acid value 6mgKOH / g, hydroxyl content 4.2%), acrylic resin b (solid content 50%, acid value 3mgKOH / g, hydroxyl Content 2.0%) 21 parts, acrylic resin c (solid content 70%, acid value 9mgKOH / g, hydroxyl content 2.24%) 23 parts, nano silicon dioxide 17 parts and 8 parts propylene glycol methyl ether acetate, start the disperser, in Stir at a medium speed at a speed of 700r / min to disperse evenly for 5 minutes to obtain a pre-dispersed resin; then add 6 parts of xylene, 7 parts of 100 # Solvent oil, 0.2 parts of substrate wetting agent, 0.4 parts of leveling agent, 0.9 parts of ultraviolet absorber, 0.5 parts of light stabilizer, stir and disperse at a medium speed at a speed of 800r / min for 1 hour to obtain component A; component B It is necessary to add 70 parts of HDI trimer curing agent and 30 parts of dehydrated n-butyl acetate into a clean container, stir until it is evenly disper...

Embodiment 3

[0017] In a clean and standard container, weigh 18 parts of acrylic resin a (solid content 70%, acid value 6mgKOH / g, hydroxyl content 4.2%), acrylic resin b (solid content 50%, acid value 3mgKOH / g, hydroxyl content Content 2.0%) 21 parts, acrylic resin c (solid content 70%, acid value 9mgKOH / g, hydroxyl content 2.24%) 25 parts, nano silicon dioxide 15 parts and 8.5 parts propylene glycol methyl ether acetate, start the disperser, in Stir at a medium speed at a speed of 700r / min to disperse evenly for 5 minutes to obtain a pre-dispersed resin; then add 6.3 parts of xylene, 5 parts of 100 # Solvent oil, 0.1 part of substrate wetting agent, 0.2 part of leveling agent, 0.6 part of ultraviolet absorber, 0.3 part of light stabilizer, stir and disperse at a medium speed at a speed of 800r / min for 1 hour to obtain component A; component B It is necessary to add 70 parts of HDI trimer curing agent and 30 parts of dehydrated n-butyl acetate into a clean container, stir until it is evenl...

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Abstract

The invention relates to a two-component acrylic varnish suitable for automobile interior decoration plastic members, especially relates to a high-scratch resistance two-component nano-modified acrylic varnish and a preparation method thereof, and belongs to the technical field of coatings. The two-component acrylic varnish is prepared through mixing a component A, a component B and a component C, wherein the component A is crude oil, the component B is a diluent, and the component C is a curing agent. The component A comprises acrylic resin, nano-silica, a wetting agent, a leveling agent, an ultraviolet ray absorber, a light stabilizer, propylene glycol methyl ether acetate, xylene and a 100# solvent; the component B comprises an HDI trimer curing agent and dehydrated butyl ethanoate; and the component C comprises toluene, propylene glycol methyl ether acetate, methyl ethyl ketone and butyl ethanoate. The varnish prepared in the invention has the advantages of excellent waterproof performance, excellent chemical substance resistance and high scratch resistance.

Description

technical field [0001] The invention relates to a two-component acrylic varnish, which is suitable for automotive interior plastic parts, in particular to a high-scratch-resistant two-component nano-modified acrylic varnish and a preparation method thereof, belonging to the technical field of chemical coating preparation technology. Background technique [0002] In recent years, people's demand for automotive interior coatings has become more and more personalized and functional. It must not only have the basic properties of general coatings, but also meet some other special properties: such as scratch resistance, water resistance, etc. The present invention adopts a two-component acrylic varnish system, modifies the system with nano silicon dioxide, and obtains an oily topcoat with high scratch resistance, which has not been reported in literature or patents so far. [0003] The invention patent with application number 201510143452.X provides a preparation method of SiC nan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/63C08G18/62C08G18/79
CPCC08G18/6216C08G18/792C08K2201/011C09D7/61C09D7/63C09D175/04C08L91/00C08K13/02C08K3/36C08K5/07
Inventor 刘立新袁丽
Owner HUNAN JINHAI SCI & TECH
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