Acrylic-amino type coating varnish composition for automobiles, varnish and application thereof

A technology of overcoating varnish and composition, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as high price

Active Publication Date: 2011-09-21
NIPPON PAINT GUANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Basf (BASF) is the best car exterior finish varnish in the industry, followed by other foreign Dupont (DuPont), PPG and other products. Although the performance can meet the requirements, the price is expensive

Method used

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  • Acrylic-amino type coating varnish composition for automobiles, varnish and application thereof
  • Acrylic-amino type coating varnish composition for automobiles, varnish and application thereof
  • Acrylic-amino type coating varnish composition for automobiles, varnish and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] formula:

[0082] The same as Comparative Example 1, the difference is that component ① is 20-40 parts by weight of high solids hydroxyl-containing acrylic resin (solids ≥ 70%, molecular weight 3000-5000) with a hydroxyl value of 130;

[0083] Preparation method: Add ① high solid hydroxyl-containing acrylic resin, ② n-butanol etherified melamine resin, ③ blocked polyisocyanate resin, ④ diurea compound modified polyacrylic resin, ⑩ part of the diluent, and stir with a mixer 30min. Then use ⑩partial diluent to dissolve ⑤ultraviolet absorber solid powder ⑥light stabilizer at 50-60℃ to a clear liquid without particles. While stirring, add the above-dissolved ultraviolet light diluent and ⑥ light stabilizer in sequence. Finally, use the remaining part and ⑩thinner to adjust the viscosity of the paint to a suitable viscosity.

[0084] Usage: Same as Comparative Example 1

Embodiment 2

[0096] formula:

[0097] 1. 20 parts by weight of high solids hydroxyl-containing acrylic resin (solids ≥ 70%, molecular weight 3000-5000) with a hydroxyl value of 130;

[0098] 2. 20 parts by weight of the melamine resin of n-butanol etherification;

[0099] 3. 1 weight part of aliphatic polyisocyanate resin blocked by 5-dimethylpyrazole (DMP);

[0100] 4. 10 parts by weight of polyacrylic resin modified by diurea compound (modified amount is 3.2-4.2% by weight);

[0101] 5. 2 parts by weight of benzotriazole ultraviolet light absorber;

[0102] 6. 0.5 parts by weight of hindered amine light stabilizer;

[0103] ⑦1.0 parts by weight of polyester modified polydimethylsiloxanes to reduce surface tension leveling agent;

[0104] ⑧Acrylic ester leveling agent 0.1 parts by weight;

[0105] ⑨ Acrylic defoamer 1 part by weight;

[0106] ⑩Diluent 10 parts by weight

[0107] Preparation method: with embodiment 1

[0108] Usage: Same as Comparative Example 1

Embodiment 3

[0110] The formula is similar to that of Example 1, except that component ① has a hydroxyl value of 150 and does not contain a defoamer.

[0111] Preparation method: Add ① high solid hydroxyl-containing acrylic resin, ② n-butanol etherified melamine resin, ③ blocked polyisocyanate resin, ④ diurea compound modified polyacrylic resin, ⑩ part of the diluent, and stir with a mixer 30min. Then use ⑩ part of the diluent to dissolve ⑤ UV absorber solid powder at 50-60°C to a clear liquid without particles. In the state of stirring, add the above-dissolved UV diluent, ⑥ light stabilizer and leveling agent in sequence. Finally, use the remaining part and ⑩thinner to adjust the viscosity of the paint to a suitable viscosity.

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Abstract

The invention provides an acrylic-amino type coating varnish composition for automobiles, which comprises the following components in parts by weight: (a) 20-48 parts of high-solid-content thermosetting hydroxy acrylic resin, (b) 20-30 parts of n-butyl alcohol etherified melamine resin, (c) 10-30 parts of diurea compound modified acrylic resin, (d) 1-10 parts of 3,5-dimethylpyrazole (DMP) closed aliphatic polyisocyanate resin, (e) 0.2-1.0 part of leveling agent and (f) acceptable amount of assistant for varnish, wherein the hydroxyl value of the high-solid-content thermosetting hydroxy acrylic resin is 120-160 mg KOH / g, and the solid content is at least 70 wt%; and the leveling agent is a polyester modified dimethyl polysiloxane solution. The film obtained by coating the acrylic-amino type coating varnish composition has the advantages of high luster and high hardness, and the sagging limit is higher than 50 mu m; and the acrylic-amino type coating varnish composition is especially suitable for exterior application of automobiles, and is also suitable for exterior application of automobile wheel hubs, motorcycles, engineering machinery, light industry products and the like.

Description

technical field [0001] The invention relates to a varnish composition for automobiles, in particular to an acrylic-amino type finish varnish composition for automobiles, the varnish and its application. Background technique [0002] As one of the products with the highest requirements for exterior decoration protection in industrial products, varnish, as the last layer of automobile exterior decoration, must not only meet the basic performance requirements such as high weather resistance and scratch resistance, but also meet high Decorative and high construction requirements are high gloss and high sag pinhole limit. At present, Basf (BASF) is the best automotive exterior finish varnish in the industry, followed by other foreign Dupont (DuPont), PPG and other products. Although the performance can meet the requirements, the price is expensive. [0003] To sum up, there is a lack of a more economical alternative product in this field, which can have the same effect as foreig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D175/00C09D7/12
Inventor 方黎明倪健
Owner NIPPON PAINT GUANGZHOU
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