Automobile water-based dual-component middle coating excellent in performance and preparation method thereof

A water-based two-component, painting technology, applied in the direction of coating, polyurea/polyurethane coating, etc., can solve the problems that the technology cannot be satisfied at the same time, reduce the solid content of construction, add more, etc.

Active Publication Date: 2016-08-03
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] ⑥Excellent low-viscosity and anti-settling properties. If the viscosity of water-based medium paint is high, good anti-settling properties can indeed be achieved, but when the viscosity is too high, more diluents must be added for construction, which will reduce its construction. Solid content, resulting in a decrease in filling;
[0014] At present, there are a small number of manufacturers selling water-based paint in the market, but after testing their products, it is found that their technology cannot meet all the above requirements at the same time

Method used

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  • Automobile water-based dual-component middle coating excellent in performance and preparation method thereof
  • Automobile water-based dual-component middle coating excellent in performance and preparation method thereof
  • Automobile water-based dual-component middle coating excellent in performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Preparation of component A of water-based two-component intermediate coating

[0052] The formula of the water-based two-component intermediate paint component A is shown in Table 1. The preparation process is as follows: ①Put deionized water into the stirred tank, and then add 2-amino-2-methyl-1- Propanol, BYK-190, FX600, TEGO-500 and TEGO-901w, after they are evenly dispersed, continue to add DE and different types of extender pigments, after the extender pigments are fully dispersed, finally add R-706 and Raven-3500, Stir for 15min at a linear speed of 8-9m / s; ②Inject the stirred slurry into a sand mill, grind for 45min-1h, and wait until the fineness is less than 30μm to obtain the component A slurry; ③Put A2470 and A2457 After adding to the stirring tank to disperse evenly, slowly add the ground slurry, and after mixing evenly add BYK-022, TEGO-240, FX1070, diacetone alcohol and 2-methyl-2-butanol, mix well, and filter by standing. The component A of the water-bas...

Embodiment 2

[0067] Table 3 shows the feeding formula of the water-based mid-coat paint prepared by changing the type of dispersant under the condition that the other materials remain unchanged in Example 2. The formula numbers are 5, 6, 7, and 8 in sequence. According to the process of preparing the water-based two-component mid-coat paint in Example 1, the 4 types of mid-coat paints numbered 5-8 shown in Table 3 were prepared, and the paint film was prepared according to the process of preparing the mid-coat film in Example 1.

[0068] Table 4 shows the properties of the water-based two-component intermediate paint prepared by formula 5, formula 6, formula 7 and formula 8. It can be seen from the table that when the dispersant combination of (BYK-190+FX600) or (BYK-194N+OROTAN+BYK-151) is used in the formulation, the water-based two-component intermediate paint has excellent storage stability and sanding Performance, filling, hiding power, adhesion, flexibility, water resistance and chemica...

Embodiment 3

[0076] Table 5 shows the feeding formula of the water-based mid-coat paint prepared by changing the proportion of the dispersant under the condition that the other materials remain unchanged in Example 3. The formula numbers are 9, 10, 11 and 12 in sequence. According to the process of preparing the water-based two-component mid-coat paint in Example 1, the four types of mid-coat paints numbered 9-12 shown in Table 5 were prepared, and the paint film was prepared according to the process of preparing the mid-coat film in Example 1.

[0077] Table 6 shows the properties of the water-based two-component intermediate paint prepared by formula 9, formula 10, formula 11 and formula 12. It can be seen from the table that when the ratio of the dispersant BYK-190 to FX600 is 0.5:4.5, the water-based two-component intermediate paint has excellent sanding, filling, hiding power, adhesion, flexibility and chemical resistance, but Its storage stability and water resistance are unqualified; w...

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Abstract

The invention discloses an automobile water-based dual-component middle coating excellent in performance and a preparation method thereof. The water-based middle coating is composed of a component A and a component B. The component A is composed of hydroxy acrylic resin, powder syrup, auxiliaries and cosolvent, wherein powder syrup contains deionized water, amine neutralizer, auxiliaries, extender pigment and pigment. The component B is composed of a curing agent, auxiliaries and cosolvent. After being put in according to the formula of the powder syrup of the component A, materials are dispersed at a high speed for 15 min and then enter a grinding machine to be ground till the granularity is smaller than 30 micron, then powder syrup is obtained, and hydroxy acrylic resin, powder syrup, auxiliaries and cosolvent are evenly mixed to obtain the component A. The component A and the component B are mixed in certain proportion, viscosity is adjusted by adding deionized water, and a middle coating film is obtained through spraying construction. By means of the water-based middle coating, the water-based performance of the automobile middle coating is achieved, the VOC content is greatly decreased, and excellent comprehensive performance is achieved.

Description

Technical field [0001] The invention relates to the technical field of automotive coatings, in particular to a water-based two-component intermediate paint with excellent comprehensive performance and a preparation method thereof. Background technique [0002] At present, my country's automotive coatings are still solvent-based, and a large number of volatile organic compounds (VOCs) have caused serious pollution to the ecological environment during the coating process, and also brought great harm to human health. As people's awareness of environmental protection has increased, governments of various countries have issued a large number of relevant regulations to limit the emission of VOCs. In order to adapt to the development of the times, automotive coatings are shifting to an environmentally friendly direction. Among them, environmentally friendly coatings include water-based coatings, powder coatings, UV curing coatings and high-solid coatings, and water-based coatings are th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D7/06C09D7/47
CPCC08K2003/265C08K2003/3045C08K2201/014C08L2205/025C08L2205/035C09D7/43C09D7/47C09D7/61C09D7/62C09D7/63C09D7/65C09D175/04C08L101/00C08K13/06C08K9/04C08K3/26C08K3/30C08K3/34C08K3/346
Inventor 张育波阮伟明秦中海李柏文陈容爱冯兆华王炼石
Owner GUANGDONG YATU CHEM
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