High appearance effect waterborne topcoat paint composition for bus body and preparation method thereof

A water-based topcoat, bus technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problem of water-based coatings cannot be applied, achieve the requirements of colorful appearance, and improve the effect of appearance effect

CN107142000AInactive Publication Date: 2017-09-08HAOLISEN COATING SHANGHAI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-09-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a high appearance effect waterborne topcoat paint composition for a bus body. The waterborne topcoat paint composition comprises a component A and a component B, wherein the component A includes the following ingredients by weight percentage: 55.0-70.0% of waterborne hydroxy acrylic acid; 30-40% of pigment and filler; 2.0-10.0% of a water-soluble organic solvent; 0.5-4.0% of functional additives; and the balance deionized water, and the component B includes the following ingredients by weight percentage: 60.0-80.0% of a waterborne isocyanate curing agent; and 20.0-40.0% of a water-soluble organic solvent. The weight percent of the component A is 75-90.0%, and the weight percent of the component B is 25%-10.0%. The paint composition provided by the invention has very good appearance effect and high gloss, and also meets the hardness, impact, weather resistance and other performance requirements and quick and defect-free construction requirements.
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Description

[0001] [technical field]

[0002] The invention relates to a water-based finish paint composition for high appearance effect of a bus body and a preparation method thereof.

[0003] [Background technique]

[0004] In recent years, with the rapid growth of the national economy, the production and sales of coatings in my country are growing at a very fast rate. However, compared with developed countries, the proportion of environmentally friendly coatings in my country is far lower than that of developed countries. In particular, highly polluting oil-based coating products still have a large market share, and these highly polluting coating products are harmful to the environment and the health of construction workers. extremely serious hazards. With the enhancement of people's awareness of environmental protection, especially the stricter and more standardized environmental protection laws and regulations of the country, there will be more and more new coating products that use g...

Examples

Embodiment B

[0055] The specific preparation steps of the water-based finish paint composition B component of the high appearance effect of the bus body in the embodiment B component 1-10 are as follows:

[0056] 1. Disperse the water-based isocyanate curing agent accounting for 60.0-80.0% of component B in a disperser at a speed of 500-800r / min for 10-15 minutes to obtain a uniformly dispersed curing agent dispersion. The isocyanate content of one of the water-based isocyanate curing agents is 9.0% to 24.0% by weight of the solid content, and the solid content is 70% to 100% by weight; The weight percent is 9.0-24.0%, and the solid content is 70%-100% by weight; the isocyanate content of the third water-based isocyanate curing agent is 18.0-48.0% by weight, and the solid content is 18.0-48.0% by weight. Calculated as 70% to 100%.

[0057] 2. After uniformly dispersing the water-soluble organic solvent accounting for 20.0-40.0% of component B, add it to the above curing agent dispersion u...

Embodiment

[0061] The specific preparation steps of the water-based finish paint composition B component of the high appearance effect of the bus body in the embodiment A+B components 1-10 are as follows:

[0062] 1. Disperse 75-90.0% of the A component and 25%-10.0% of the B component in the disperser at a speed of 500-800r / min for 20-30 minutes to obtain a dispersed Uniform dispersion. The balance was made up with deionized water.

[0063] Table 3. Composition of Embodiment A+B Components 1-10

[0064] (unit: mass percentage)

[0065]

[0066] The test method of the water-based finish paint composition prepared by embodiment A+B component 1~10 is as follows: measure the glossiness of paint film with the gloss meter of German BYK company, the film thickness of every group of paint is 40-50um; Fog The shadow value is also measured by the haze meter of BYK in Germany. The haze value of 5 points is taken for each group, and then the average value is taken; the DOI is also measured by...