Quick-drying scratch-resistant varnish composition with high solid content as well as preparation method and application of quick-drying scratch-resistant varnish composition

A fast-drying, scratch-resistant technology used in coatings to solve problems such as high construction solids, slow initial drying of varnishes, and inability to polish and assemble

Active Publication Date: 2016-09-21
NIPPON PAINT CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to protect the environment, the development direction of automotive refinish paint is water-based paint and high-solid varnish. However, the traditional high-solid varnish needs to meet high construction solid content, the molecular weight of the resin is small, and the glass transition temperature is low. The (Tg) point is low, resulting in a slow initial drying speed of the varnish. It cannot be polished and assembled according to normal baking conditions or natural drying time, which reduces the production efficiency of car repair.
[0003] It is difficult to balance the drying speed and construction solid content of traditional automotive refinish varnishes. Using high molecular weight and high Tg resins can increase the drying speed, but often cannot achieve high construction solid content, and the drying speed of varnishes with high construction solid content cannot make people satisfy
By changing the main resin type of the paint from acrylic to a special functional resin, a fast drying speed and a good balance of construction solids can be achieved, but it will also bring new problems: a) too short usab

Method used

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  • Quick-drying scratch-resistant varnish composition with high solid content as well as preparation method and application of quick-drying scratch-resistant varnish composition
  • Quick-drying scratch-resistant varnish composition with high solid content as well as preparation method and application of quick-drying scratch-resistant varnish composition
  • Quick-drying scratch-resistant varnish composition with high solid content as well as preparation method and application of quick-drying scratch-resistant varnish composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 7.18 parts of butyl acetate, 6 parts of methyl amyl ketone, 3 parts of methyl isobutyl ketone and 3 parts of 3-methoxy butyl propionate into a container with a stirrer. 15 parts of 75% polyester resin of Seta 1603 BA-78, 0.02 parts of dibutyltin dilaurate, 0.2 parts of dimethylethanolamine, 65 parts of Dianal LR-7928 acrylic resin with a curing amount of 75%, Tinuvin 1130 UV absorber 1.0 part of Tinuvin 292 hindered amine light stabilizer, 0.2 part of BYK 306 silicone leveling agent, 0.4 part of BYK 358N acrylate leveling agent, 0.2 part of BYK410 anti-sag additive, stir well to obtain varnish;

[0063] Under the protection of nitrogen, add 5 parts of butyl acetate, 10 parts of ethyl acetate, and 5 parts of methyl amyl ketone, stir well, use a moisture tester to test the moisture content, the moisture content is controlled at ≤0.03%, and then under stirring Add 55 parts of DESMOPHEN 3300 isocyanate and 25 parts of DESMODUR Z4470 BA isocyanate; stir evenly to obtain ...

Embodiment 2

[0066] Add 3.43 parts of butyl acetate, 6 parts of methyl amyl ketone, 3 parts of methyl isobutyl ketone and 3 parts of 3-methoxy butyl propionate into a container with a stirrer. 10 parts of polyester resin of 54% BBHA D5025 (CyglazBB500), 0.02 parts of dibutyltin dilaurate, 72 parts of Macrynal SM2810 75 BAC acrylic resin with a solid content of 75%, 1.0 parts of Tinuvin 400 UV absorber, Tinuvin 292 hindered amine 0.5 part of light stabilizer, 0.1 part of BYK 306 silicone leveling agent, 0.25 part of BYK 358N acrylate leveling agent, 0.2 part of solthix 250 rheology additive, 0.05 part of BYK 331 silicone leveling agent, stir well to obtain varnish;

[0067] Under the protection of nitrogen, add 10 parts of butyl acetate, 25 parts of ethyl acetate, and 5 parts of methyl amyl ketone, stir well, use a moisture tester to test the moisture content, the moisture content is controlled at ≤0.03%, and then under stirring Add 60 parts of DESMOPHEN 3600 isocyanate; stir evenly to obta...

Embodiment 3

[0070] Add 4.76 parts of butyl acetate, 6 parts of methyl amyl ketone, 5 parts of methyl isobutyl ketone and 2 parts of 3-methoxy butyl propionate into a container with a stirrer. 8 parts of 62% BB 600 polyester resin, 0.02 part of dibutyltin dilaurate, 72 parts of Uracron CY 250 E-75 acrylic resin with a solid content of 75%, 1.0 part of Tinuvin 1130 UV absorber, Tinuvin 292 hindered amine light 0.5 part of stabilizer, 0.3 part of BYK 358N acrylate leveling agent, 0.1 part of EFKA 3600 fluorine-modified acrylate leveling agent, 0.04 part of Modaflow 2100 leveling agent, 0.3 part of Solthix 250 rheology additive, and stir evenly to obtain varnish;

[0071] Under nitrogen protection, add 5 parts of butyl acetate, 20 parts of ethyl acetate, 4.7 parts of S-100 solvent naphtha or trimethylbenzene solvent naphtha, 5 parts of methyl amyl ketone and 0.3 parts of ADDITIVE TI monofunctional isocyanate, and stir well , use a moisture tester to test the moisture content, the moisture con...

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PUM

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Abstract

The invention discloses quick-drying scratch-resistant varnish composition with high solid content. The quick-drying scratch-resistant varnish composition comprises varnish and a curing agent in a volume ratio being 2:1, wherein the varnish comprises components in parts by weight as follows: 60-80 parts of acrylic resin, 3-20 parts of polyester resin, 0.4-1 part of a leveling agent, 0.02-0.5 parts of a catalyst, 1-2 parts of an ageing-resistant auxiliary and 10-20 parts of a first solvent; the curing agent comprises components in parts by weight as follows: 60-80 parts of isocyanate and 10-20 parts of a second solvent. The quick-drying scratch-resistant varnish composition with high solid content has quick-drying performance and scratch resistance, further has good paint film property, workability and high construction solid content and is particularly applicable to painting for automobile repairing, and the VOC (volatile organic compounds) can be reduced to 420 g/L or lower.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-solid fast-drying scratch-resistant varnish composition, a preparation method and an application. Background technique [0002] In order to protect the environment, the development direction of automotive refinish paint is water-based paint and high-solid varnish. However, the traditional high-solid varnish needs to meet high construction solid content, the molecular weight of the resin is small, and the glass transition temperature is low. The (Tg) point is low, which causes the initial drying speed of the varnish to be slow, and it cannot be polished and assembled according to normal baking conditions or natural drying time, which reduces the production efficiency of automobile repair. [0003] It is difficult to balance the drying speed and construction solid content of traditional automotive refinish varnishes. Using high molecular weight and high Tg resins can increa...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D7/12C08G18/42C08G18/62C08G18/79
CPCC08G18/4063C08G18/42C08G18/6216C08G18/792C08K5/00C09D7/63C09D175/06
Inventor 祁康法戚永君
Owner NIPPON PAINT CHINA
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