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Solvent type low-VOC (Volatile Organic Compound) bus intermediate coat and preparation method thereof

A solvent-based, bus-based technology, which is applied in the field of solvent-based low-VOC bus paint and its preparation, can solve the problems of high VOC content and viscosity, poor adhesion and flexibility, etc., and achieve good workability, improved dispersion, and flow Excellent results for flat and smooth surfaces

Inactive Publication Date: 2018-11-23
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this patent is high VOC content and viscosity, poor adhesion and flexibility

Method used

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  • Solvent type low-VOC (Volatile Organic Compound) bus intermediate coat and preparation method thereof
  • Solvent type low-VOC (Volatile Organic Compound) bus intermediate coat and preparation method thereof
  • Solvent type low-VOC (Volatile Organic Compound) bus intermediate coat and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0037] According to the ratio (in parts by weight) of Table 1, prepare the first component of the middle paint, according to the ratio (in parts by weight) of Table 2, prepare the second component of the middle paint, the weight ratio of the first component and the second component 1:1:

[0038] Table 1

[0039]

[0040]

[0041] Wherein, the particle diameters of talcum powder and barium sulfate are both 1250 mesh. The preparation steps of composite coupling agent are:

[0042] A1. Add silane A171 to 10 times the weight of ethanol, stir at 45°C for 1 hour to obtain A solution, add tetrabutyl titanate to 10 times the weight of ethanol, and stir at 50°C for 1 hour to obtain B solution, add chlorine Barium chloride was added to 10 times the weight of ethanol, heated to reflux temperature and stirred for 1 hour to obtain acrylic solution;

[0043] A2. Mix A solution, B solution, and C solution with a weight ratio of 1:1:1, stir at 60°C for 2 hours to obtain the reactant,...

Embodiment 1

[0044] The preparation steps of the first component of embodiment 1 are:

[0045] B1. each component is taken by weight, propylene glycol methyl ether acetate, butyl acetate, DBE are added in the stirring tank, and stirred for 5 minutes under 290 rev / min rotating speeds;

[0046] B2. Add the wetting and dispersing agent into the stirring tank, and stir for 5 minutes at a speed of 390 rpm;

[0047] B3. Acrylic resin is added in the stirred tank, and stirred for 5 minutes under the rotating speed of 690 rpm;

[0048] B4. anti-sedimentation agent, organic bentonite, talcum powder, barium sulfate, titanium dioxide, zinc stearate, carbon black powder were added in the stirring tank, stirred at 690 rpm for 40 minutes to obtain mixed coarse material;

[0049] B5. Grind the mixed coarse material with a sand mill to a fineness of ≤30 μm and then discharge to obtain a slurry. The particle size of the zirconia beads in the sand mill is 1.2mm, and the speed of the grinder is 1290 rpm. T...

Embodiment 2

[0051] The difference between the preparation steps of the first component of Example 2 and Example 1 is that the rotating speeds in steps B1, B2, B3, B4, and B6 are respectively 300, 400, 700, 700, and 700 rpm, and steps B1, B2 , B3, and the stirring time in B4 are respectively 4, 4, 4, and 30 minutes; the particle diameter of the zirconia beads of the grinder in the step B5 is 1.3mm, and the rotating speed of the grinder is 1300 rpm, and the outlet of the slurry The temperature was 60° C., and the internal pressure of the mill was 1 MPa.

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Abstract

The invention provides a solvent type low-VOC (Volatile Organic Compound) bus intermediate coat. The solvent type low-VOC bus intermediate coat is prepared from a component A and a component B in equal weight, wherein the component A is prepared from the following components in parts by weight: 30 to 40 parts of acrylic resin, 0.5 to 1 part of a wetting dispersant, 0.5 to 1 part of an anti-settling agent, 10 to 20 parts of talcum powder, 10 to 20 parts of barium sulfate, 20 to 30 parts of titanium dioxide, 2 to 5 parts of zinc stearate, 0.1 to 0.2 part of carbon black powder, 5 to 10 parts ofbutyl acetate, 5 to 10 parts of propylene glycol methyl ether acetate, 5 to 10 parts of DBE (Dibasic Acid Ester), 0.1 to 0.5 part of an acrylate flatting agent, 0.01 to 0.05 part of a drier and 5 to 10 parts of a compound coupling agent; the component B is prepared from the following components in parts by weight:50 to 70 parts of isocyanate, 10 to 30 parts of the butyl acetate and 10 to 20 partsof the DBE. The invention also provides a preparation method of the solvent type low-VOC bus intermediate coat. The solvent type low-VOC bus intermediate coat provided by the invention is very low inVOC content and viscosity and also is very good in adhesion and flexibility.

Description

technical field [0001] The invention relates to a bus intermediate paint, in particular to a solvent-type low-VOC bus intermediate paint and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry, automotive coatings have played a pivotal role in the development of industrial coatings in China, accounting for 15-20% of the total output of coatings. Most of the current automotive coatings are multi-layer coatings. As the main part of automotive paints-body coatings generally include primer, intermediate coats and topcoats. This system can basically meet many requirements of automotive coatings. . The intermediate paint is the paint between the base coat and the top coat layer, and the intermediate paint is almost always used in the mid-to-high-end cars and buses with high decoration requirements. The base material used in the intermediate coating is generally similar to the base material used in the primer and top c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/40C09D7/20C09D7/63
CPCC09D7/20C09D7/40C09D7/63C09D175/04C08K13/02C08K3/34C08K5/098C08K3/04C08K5/57
Inventor 冯兆均叶永良方律曾顺宁陈容爱
Owner GUANGDONG YATU CHEM