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A kind of scratch-coating type mid-coat automotive coating based on thermoplastic acrylic resin and preparation method thereof

A thermoplastic acrylic and resin technology, applied in the direction of coating, can solve problems such as heavy workload, and achieve the effect of improving adhesion, reducing cracking of topcoat, and excellent smoothness of topcoat

Active Publication Date: 2021-03-23
清远永昌涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the field of automotive paint repair, the problem caused by the use of sprayable intermediate paint for paint repair is that the position to be repaired needs to be removed and polished in a large range, and the workload is large.

Method used

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  • A kind of scratch-coating type mid-coat automotive coating based on thermoplastic acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method based on thermoplastic acrylic resin scraping type intermediate coating automobile paint, comprises the steps:

[0032] Step 1: Mix 39kg of thermoplastic acrylic resin NeoCryl B-735 with 37kg of xylene for 15 minutes, and add 800g of wetting and dispersing agent BYK-W966 after mixing evenly; the dispersion temperature is 60°C, which should be controlled during the entire reaction process;

[0033] Step 2: Add 4kg of calcium carbonate and 16kg of quartz powder to the mixture in step 1 under high-speed stirring; the powder should be added gradually so that the powder can be evenly dispersed into the system, and the dispersion time is 35min.

[0034] Step 3: Add 200g of pigment dispersant BYK-163 and 3kg of titanium dioxide to the reaction system in step 2, stir at high speed for 6 minutes, and then stir at low speed and discharge after stirring evenly.

Embodiment 2

[0036] A kind of preparation method based on thermoplastic acrylic resin scraping type intermediate coating automobile paint, comprises the steps:

[0037] Step 1: Mix 44kg of thermoplastic acrylic resin NeoCryl B-735 with 24.7kg of xylene for 15 minutes, add 1kg of wetting and dispersing agent BYK-W966 after mixing evenly; the dispersion temperature is 65°C, and should be controlled at this temperature during the entire reaction process ;

[0038] Step 2: Add 5kg of quartz powder and 20kg of calcium carbonate to the mixture in step 1 under high-speed stirring; the powder should be added gradually so that the powder can be evenly dispersed into the system, and the dispersion time is 40min.

[0039] Step 3: Add 300g of pigment dispersant BYK-163 and 5kg of titanium dioxide to the reaction system in step 2 and stir at a high speed for 6 minutes, then stir at a low speed and discharge after stirring evenly.

Embodiment 3

[0041] A kind of preparation method based on thermoplastic acrylic resin scraping type intermediate coating automobile paint, comprises the steps:

[0042] Step 1: Mix 38kg of thermoplastic acrylic resin NeoCryl B-735 with 36.3kg of xylene for 15 minutes, and add 0.6kg of wetting and dispersing agent BYK-W966 after mixing evenly; the dispersion temperature is 60°C, which should be controlled during the entire reaction process temperature;

[0043] Step 2: Add 10kg of calcium carbonate and 10kg of quartz powder to the mixture in step 1 under high-speed stirring; the powder should be added gradually so that the powder can be evenly dispersed into the system, and the dispersion time is 30min.

[0044] Step 3: Add 100g of pigment dispersant BYK-163 and 2kg of titanium dioxide to the reaction system in step 2, stir at high speed for 10min, and then stir at low speed and discharge after stirring evenly.

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Abstract

The invention discloses scrape coating type under coat automobile paint based on thermoplastic acrylic resin. The paint is prepared from the following ingredients in parts by weight: 38-44 parts of thermoplastic acrylic resin, 20-25 parts of powder, 0.5-1 part of a wetting dispersant BYK-W966, 2-8 parts of pigment and 0.1-0.3 part of a pigment dispersant; xylene is added until the total weight ofa system is 100 parts by weight; the thermoplastic acrylic resin is NeoCryl B-735 solid thermoplastic acrylic resin. The paint disclosed by the invention has the following excellent properties: 1, thescrape coating hand feeling is good; 2, the solid content is high, the viscosity is not high, and the VOC (volatile organic compounds) discharge is reduced; 3, the ductility is consistent with the ductility of finishing coat; 4, the adhesive force with the finishing coat is good; and 5, the viscosity is low in a high-temperature condition and high in a low-temperature condition.

Description

technical field [0001] The invention relates to the field of automotive intermediate coatings, in particular to a scraping type intermediate coating automotive coating based on thermoplastic acrylic resin and a preparation method thereof. Background technique [0002] Intermediate coating is a coating applied between primer and topcoat. With the development of science and technology, water-based intermediate coating has made great progress. For example, CN201510580874.3 discloses a water-based intermediate coating, calculated by weight percentage, The water-based intermediate paint includes 50-60% epoxy-silicone resin modified polyurethane-acrylic water dispersion, 17-23% anti-rust pigment, 12-17% filler, 0.1-0.3% wetting agent, 0.4-3% propylene glycol-methyl ether, 0.1-0.4% defoamer, 0.1-0.3% dimethylethanolamine and the balance of water. The water-based intermediate paint uses the above-mentioned water dispersion as the base material. The coating film not only has the cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D7/40C09D7/61
CPCC08K2003/2241C08K2003/265C09D133/00C09D7/40C09D7/61C08K3/26C08K3/36C08K3/22
Inventor 吴灿云
Owner 清远永昌涂料有限公司
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