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Quick-drying high-gloss varnish of automobile refinishing paint and preparation method of varnish

A fast-drying technology for automotive refinish paint, applied in the field of coatings, can solve the problems of reducing repair paint repair efficiency, impact resistance and other performance damage, and achieve the effects of long pot life, improved performance, and improved catalytic speed

Inactive Publication Date: 2019-05-07
DONGLAI COATING TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technologies have improved the drying speed of the varnish to a certain extent, it generally takes more than 2 hours at the fastest, and the specific properties of the varnish, especially storage stability, usable time, impact strength and other performances are still damaged, which is greatly affected. This reduces the repairing efficiency of the repairing paint. The present invention has developed a varnish for the above situation. While ensuring a long enough service time and other properties, it has the characteristics of a faster drying speed at room temperature.

Method used

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  • Quick-drying high-gloss varnish of automobile refinishing paint and preparation method of varnish
  • Quick-drying high-gloss varnish of automobile refinishing paint and preparation method of varnish
  • Quick-drying high-gloss varnish of automobile refinishing paint and preparation method of varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composition of a kind of quick-drying repair varnish is expressed as follows:

[0025] Component A

[0026]

[0027]

[0028] Component B

[0029]

[0030] Mix components A and B evenly at a mass ratio of 4:1, and dilute to spray viscosity with a thinner to obtain a water-based two-component high-gloss varnish.

[0031] (1) Spray the quick-drying repair varnish on a large A4 tin plate with a white background, measure its flexibility, dry hardness, impact resistance, polishing time, gloss, adhesion, and observe its plumpness.

[0032] (2) Spray the quick-drying repair varnish on the electrophoretic plate with a white background, and measure its water resistance, acid and alkali resistance, and gasoline resistance.

[0033] (3) Spray the quick-drying repair varnish on an aluminum plate with a white background, and measure its aging resistance.

[0034]

[0035]

[0036] It can be seen from the above test items that the quick-drying repair varnish has...

Embodiment 2

[0038] A preparation method of said quick-drying repair varnish comprises the following steps:

[0039] (1) Formula quantity by mass percentage: 60% acrylic resin Nuplex, 36% solvent butyl acetate, disperse with a disperser for 5-20 minutes, the dispersion speed is 600r / min, and then add 4% additives (mass ratio 3: 1:0.5 mixture of catalyst T120, leveling agent BYK 358 and UV-resistant additive CIBA 384-2), uniform dispersion, dispersion speed of 600r / min, dispersion time of 20 minutes, that is, quick-drying repair varnish A component ;

[0040] (2) Formula amount by mass percentage: 80% polyisocyanate curing agent, 20% solvent butyl acetate, carry out high-speed dispersion in a disperser, the dispersion speed is 600r / min, the dispersion time is 20 minutes, and the dispersion is uniform, that is, get Quick-drying repair varnish component B;

[0041] (3) Mix components A and B evenly at a mass ratio of 2:1 to obtain a quick-drying repair high-gloss varnish. The varnish can be...

Embodiment 3

[0043] A preparation method of said quick-drying repair varnish comprises the following steps:

[0044] (1) Formula amount by mass percentage: 55% acrylic resin Nuplex, 35% solvent butyl acetate, disperse with a disperser for 20 minutes, the dispersion speed is 600-800r / min, and then add 5% additives (mass ratio 3: 2:1 mixture of catalyst T120, leveling agent BYK 358 and UV-resistant additive CIBA 384-2), uniform dispersion, dispersion speed of 800r / min, dispersion time of 30 minutes, that is, quick-drying repair varnish A component ;

[0045] (2) Formula amount by mass percentage: 85% polyisocyanate curing agent, 15% solvent butyl acetate, carry out high-speed dispersion in a disperser, the dispersion speed is 800r / min, the dispersion time is 40 minutes, and the dispersion is uniform, that is, get Quick-drying repair varnish component B;

[0046](3) Mix components A and B evenly at a mass ratio of 6:1 to obtain a quick-drying repair high-gloss varnish. The varnish can be dr...

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PUM

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Abstract

The invention relates to a quick-drying high-gloss varnish of automobile refinishing paint and a preparation method of the varnish. The varnish comprises a component A and a component B, and the massratio of the component A to the component B is (2-6):1. (1) The component A comprises the following components in percentage by mass: 60-65% of acrylic resin, 30%-40% of a solvent and 4%-7% of an assistant; and (2) the component B comprises the following components in percentage by mass: 80-85% of a polyisocyanate curing agent and 15-20% of a solvent. Compared with the prior art, the varnish provided by the invention has the following advantages that the special modified acrylic resin and a catalyst are used, so that grinding and polishing can be carried out after 25 minutes at a normal temperature (25 DEG C) while performance of the varnish is ensured.

Description

technical field [0001] The invention relates to the paint industry, in particular to a quick-drying repair varnish and a preparation method thereof. Background technique [0002] Ordinary car refinish paints generally need to be baked at 70-80°C for 0.5-1h after spraying, or placed at room temperature for 10-12h before the coating can complete the initial drying, which results in low car repair efficiency and high energy consumption for coating. series of questions. So in recent years, ultra-fast drying varnishes have received more and more attention in the car refinish market. [0003] In order to solve the problem of fast drying of varnish, patent CN102153691A provides a method of improving the drying speed of varnish through the optimization of solvent composition and the introduction of modified cellulose acetate butyrate and isophorone diisocyanate curing agent, but this The cost of the method is higher and the drying speed of the varnish does not increase much. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04
Inventor 朱忠敏林在强杨亚和
Owner DONGLAI COATING TECH SHANGHAI
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