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A water-based two-component primer for automobiles with excellent 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: 2018-04-13
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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  • A water-based two-component primer for automobiles with excellent performance and preparation method thereof
  • A water-based two-component primer for automobiles with excellent performance and preparation method thereof
  • A water-based two-component primer for automobiles with excellent performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Preparation of paint component A in water-based two-component paint

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

Embodiment 2

[0067] Table 3 is the feeding formula for water-based intermediate paint prepared by changing the type of dispersant in Example 2 while keeping other materials unchanged. The formula numbers are 5, 6, 7 and 8 in sequence. According to the technical process of preparing water-based two-component intermediate coatings in Example 1, 4 kinds of intermediate coatings with numbers 5 to 8 shown in Table 3 were prepared, and the paint film was prepared according to the technical process of preparing intermediate coating films in Example 1.

[0068] The properties of the water-borne two-component mid-coats prepared by formulation 5, formulation 6, formulation 7 and formulation 8 are shown in Table 4. It can be seen from the table that when the dispersant combination of (BYK-190+FX600) or (BYK-194N+OROTAN Quick Easy+BYK-151) is used in the formula, the water-based two-component mid-coat paint has excellent storage stability. performance, filling, hiding power, adhesion, flexibility, wat...

Embodiment 3

[0076] Table 5 is the feeding formula of Example 3 to prepare water-based intermediate paint by changing the proportion of dispersant while keeping other materials unchanged, and the formula numbers are 9, 10, 11 and 12 in sequence. According to the technical process of preparing water-based two-component intermediate coatings in Example 1, 4 kinds of intermediate coatings with numbers 9 to 12 shown in Table 5 were prepared, and the paint films were prepared according to the technical process of preparing intermediate coatings in Example 1.

[0077] The properties of the waterborne two-pack mid-coats prepared from Formulation 9, Formulation 10, Formulation 11 and Formulation 12 are shown in Table 6. It can be seen from the table that when the ratio of dispersant BYK-190 and FX600 is 0.5:4.5, the water-based two-component medium paint has excellent sandability, filling, hiding power, adhesion, flexibility and chemical resistance, but Its storage stability and water resistance a...

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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 coating with excellent comprehensive performance and a preparation method thereof. Background technique [0002] At present, my country's automotive coatings are still mainly solvent-based, and a large number of volatile organic compounds (VOCs) have caused serious pollution to the ecological environment during the coating process, and have also brought great harm to human health. With the improvement of people's awareness of environmental protection, governments of various countries have introduced a large number of relevant regulations to limit the emission of VOCs. In order to keep up with the development of the times, automotive coatings are changing to be environmentally friendly. Environmentally friendly coatings include water-based coatings, powder coatings, UV-curable coatings and high-solid coatings, and water-based co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/45C09D7/47
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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