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Automobile water-based two-component epoxy primer with excellent performance and preparation method thereof

A water-based two-component, epoxy primer technology, used in epoxy resin coatings, coatings, etc., can solve the problems of reducing construction solid content, adding more, and reducing filling.

Active Publication Date: 2016-09-21
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 the water-based epoxy primer is high, it can indeed achieve good anti-settling properties, but when the viscosity is too high, more diluents must be added for construction, which will reduce its Construction solid content, resulting in a decline in filling;
[0014] At present, there are a small number of manufacturers selling water-based epoxy primers on 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 two-component epoxy primer with excellent performance and preparation method thereof
  • Automobile water-based two-component epoxy primer with excellent performance and preparation method thereof
  • Automobile water-based two-component epoxy primer with excellent performance and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1. Preparation of waterborne two-component epoxy primer component A

[0050]The formula of component A of the water-based two-component epoxy primer is shown in Table 1. The preparation process is as follows: ①Put deionized water into the stirring tank, then add BYK-190, FX600, TEGO-500 and TEGO-901w, after it is uniformly dispersed, continue to add DE and different types of extender pigments. After the extender pigments are fully dispersed, finally add aluminum tripolyphosphate, zinc iron phosphate, R-706 and Raven-3500, at 8-9m Stir at a linear speed of / s for 15 minutes; ②Pour the stirred slurry into a sand mill, grind for 45min-1h, and wait until the fineness is less than 30μm to obtain component A slurry; ③Put EP 386w, polyethylene glycol , n-hexanol mixed evenly, slowly add the ground slurry, after mixing evenly, add BYK-022, TEGO-240 and FX1070, stir evenly, stand and filter, and then get the component A of the water-based two-component epoxy primer .

[0051] ...

Embodiment 2

[0065] Table 3 is the feeding formula for preparing the water-based epoxy primer by changing the type of dispersant in Example 2 while keeping other materials unchanged, and the formula numbers are 5, 6, 7 and 8 in turn. 4 kinds of epoxy primers that are numbered as 5~8 shown in table 3 are prepared by the technical process of embodiment 1 to prepare water-based two-component epoxy primer, and prepare paint film according to the technical process of embodiment 1 to prepare epoxy primer film .

[0066] The properties of the waterborne two-component epoxy primers prepared by formula 5, formula 6, formula 7 and formula 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+BYK-151) is used in the formula, the water-based two-component epoxy primer has excellent storage stability, Grinding, filling, hiding power, adhesion, flexibility, water resistance and chemical resistance; when the dispersant combinati...

Embodiment 3

[0074] Table 5 is the feeding formula for preparing the water-based epoxy primer by changing the ratio of the dispersant in Example 3 while keeping other materials unchanged, and the formula numbers are 9, 10, 11 and 12 in turn. According to the technological process that embodiment 1 prepares water-based two-component epoxy primer, the numbering shown in table 5 is 4 kinds of epoxy primers that are 9~12, and the technological process that prepares epoxy primer film by embodiment 1 prepares paint film .

[0075] The properties of the water-borne two-component epoxy primers prepared by formula 9, formula 10, formula 11 and formula 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 epoxy primer has excellent sandability, filling, hiding power, adhesion, flexibility and chemical resistance. But its storage stability and water resistance are unqualified; when the ratio of dispersant ...

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Abstract

The invention discloses an automobile water-based two-component epoxy primer with excellent performance and a preparation method thereof. The water-based epoxy primer involved in the invention is composed of a component A and a component B. The component A is composed of epoxy resin, a cosolvent, powder slurry and assistants, wherein the powder slurry includes deionized water, additives, extender pigment, anti-rust pigment and pigment. The component B contains a polyamine curing agent, deionized water, a cosolvent and assistants. The preparation method includes: conducting charging according to the powder slurry formula of the component A, then performing high speed dispersion for 15min, then bringing the materials into a sand mill to conduct grinding to fineness of less than 30 micrometers to obtain the powder slurry, mixing epoxy resin, the cosolvent, the powder slurry and the assistants evenly to obtain the component A, mixing the component A with the components B in certain proportion, adding deionized water to adjust viscosity, and carrying out spray coating to obtain an epoxy primer film. The water-based epoxy primer provided by the invention not only realizes aquation of automobile epoxy primer and great reduction of the VOC content, but also has excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of automotive coatings, in particular to a water-based two-component epoxy primer 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 coatings a...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/12
CPCC09D7/61C09D7/63C09D163/00C08L71/00C08K13/02C08K2003/327C08K2003/321C08K2003/265C08K2003/3045C08K5/098C08K3/34C08K3/346C08K5/05
Inventor 张育波江瀚施沃成张伟陈容爱冯兆华王炼石
Owner GUANGDONG YATU CHEM
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