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Middle coating for wet-on-wet coating process as well as preparation method and application of middle coating

A coating process, wet-on-wet technology, used in polyurea/polyurethane coatings, coatings, etc., to achieve the best water resistance, low VOC emission value, high leveling, improved adhesion and water resistance.

Active Publication Date: 2022-05-17
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also requires high-temperature baking, and the surface drying time is as long as 24 hours

Method used

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  • Middle coating for wet-on-wet coating process as well as preparation method and application of middle coating
  • Middle coating for wet-on-wet coating process as well as preparation method and application of middle coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 A kind of preparation method of intermediate coating coating for described wet-on-wet coating process

[0042] The preparation method of A component comprises the following steps:

[0043] Step (1): Add 20 parts of modified hydroxyacrylic resin, 5 parts of hyperbranched polyester resin, 2 parts of PMA, 2 parts of BAC, 5 parts of xylene, 0.5 parts of BYK-110, 2 parts of superfine silica powder, 2 parts of talcum powder, 2 parts of superfine barium sulfate, 11 parts of titanium dioxide, 0.5 parts of modified bentonite, 0.3 parts of fumed silica, 0.2 parts of carbon black, pre-dispersed at 900 rpm, using a horizontal sand mill Grind to a fineness of less than 15um, control the powder outflow conditions to a temperature below 50°C, and a flow rate of 10 L / min to obtain a slurry;

[0044] Step (2): Add 0.1 part of BYK-331 to step (1), and stir for 5 minutes at 300 rpm;

[0045] Step (3): Put 0.01 part of drier air chemical T12 into step (1), and stir for 5-10 ...

Embodiment 2

[0049] Embodiment 2 A kind of preparation method of intermediate coating paint for wet-on-wet coating process

[0050] The preparation method of A component comprises the following steps:

[0051] Step (1): Add 30 parts of modified hydroxyacrylic resin, 11 parts of hyperbranched polyester resin, 5 parts of PMA, 4 parts of BAC, 15 parts of xylene, 1 part of BYK-110, 6 parts of superfine silica powder, and superfine talc 12 parts of powder, 12 parts of superfine barium sulfate, 23 parts of titanium dioxide, 0.8 parts of modified bentonite, 0.5 parts of fumed silica, 0.4 parts of carbon black, pre-dispersed at 1200 rpm, and ground with a horizontal sand mill When the fineness is less than 15um, control the outflow condition of the powder to be below 50°C, and the flow rate is 15L / min to obtain the slurry;

[0052] Step (2): Add 0.5 parts of BYK-331 to step (1), stir at 600 rpm for 10 minutes;

[0053] Step (3): Put 0.03 parts of drier air chemistry T12 into step (1), and stir f...

Embodiment 3

[0057] Embodiment 3 A kind of preparation method of intermediate coating paint for wet-on-wet coating process

[0058] The preparation method of A component comprises the following steps:

[0059] Step (1): Add 25 parts of modified hydroxyacrylic resin, 11 parts of hyperbranched polyester resin, 2.5 parts of PMA, 4 parts of BAC, 5 parts of xylene, 1 part of BYK-110, 3 parts of superfine silica powder, 12 parts of superfine talcum powder, 12 parts of superfine barium sulfate, 20 parts of titanium dioxide, 0.5 parts of modified bentonite, 0.3 parts of fumed silica, 0.2 parts of carbon black, pre-dispersed at 1000 rpm, using horizontal sand Grind with a mill until the fineness is below 15um, control the powder outflow conditions to be below 50°C, and flow at 15L / min to obtain a slurry;

[0060] Step (2): Add 0.3 parts of BYK-331 to step (1), stir at 300 rpm for 10 minutes;

[0061] Step (3): Put 0.01 parts of drier air chemistry T12 into step (1), and stir for 5-10 minutes at 4...

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Abstract

The invention belongs to the technical field of polymer coatings, and particularly relates to a floating coating for a wet-on-wet coating process as well as a preparation method and application of the floating coating. The floating coating provided by the invention comprises a component A and a component B, wherein the component A comprises modified hydroxy acrylic resin, hyperbranched polyester resin, PMA, BAC, a dispersing agent, a siloxane-based coupling agent, superfine talcum powder, superfine barium sulfate, titanium dioxide, superfine silica powder, modified bentonite, fumed silica and other raw materials. The obtained coating has excellent adhesive force, the adhesive force on an electrophoresis layer and the surface of putty can be up to level 0 through cross-cut measurement, and the coating has high filling property; surface drying is conducted for 20-30 min at the room temperature, the function that the 2K finish paint can be directly coated through the wet-on-wet process is achieved, the fullness and glossiness of the finish paint are obviously improved, the process time is shortened to a great extent, and the production benefits are improved; and meanwhile, the paint has an ultra-low VOC emission value, and is more environmentally friendly and energy-saving.

Description

technical field [0001] The invention belongs to the technical field of polymer coatings, and in particular relates to an intermediate coating coating for wet-on-wet coating technology and a preparation method and application thereof. Background technique [0002] The intermediate layer coating refers to the coating used for the intermediate coating between the primer layer and the topcoat layer. It can create a good base for the topcoat layer by improving the flatness of the surface of the car body and the primer layer, so as to improve the coating quality. Layers of decoration. The intermediate coating is different from the primer. First, it needs to have excellent impact resistance and filling performance to deal with the impact of gravel on the surface of the car body and fill the electrophoretic surface; , The ambient temperature of the hot summer has a certain insulation ability, so that the electrophoretic paint can be better protected. Therefore, there are higher re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/62C09D7/63
CPCC09D175/04C09D7/61C09D7/62C09D7/63C09D7/70C08K2003/2241C08K3/36C08K3/34C08K3/30C08K3/22C08K9/00C08K3/346C08K7/26C08K5/54
Inventor 冯兆均江瀚方律曾顺宁谭立斌
Owner GUANGDONG YATU CHEM
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