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High-hardness and quick-drying water-based two-component filling clear primer and preparation method thereof

A two-component, clear primer technology, applied in primers, coatings, polyurea/polyurethane coatings, etc., can solve the problems of unproven, high hardness, and high crosslinking density of water-based two-component bright white paint. Achieve fast drying speed, increase hardness performance, and improve performance

Inactive Publication Date: 2020-11-20
HUIZHOU CHANGRUNFA PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This water-based two-component bright white paint has high crosslinking density and high hardness, but the white paint is a top coat, and its full sealing effect needs to be verified

Method used

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  • High-hardness and quick-drying water-based two-component filling clear primer and preparation method thereof
  • High-hardness and quick-drying water-based two-component filling clear primer and preparation method thereof
  • High-hardness and quick-drying water-based two-component filling clear primer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Mix component A-proportion A and component B-proportion A according to the equivalent ratio of n(-NCO):n(-OH)=1.6, mix evenly, add water to adjust to a suitable viscosity for construction, and let it stand for 5 minutes , that is, high hardness, quick-drying water-based two-component filling clear primer.

Embodiment 2

[0074] Mix component A-proportion A and component B-proportion B according to the equivalent ratio of n(-NCO):n(-OH)=1.6, mix evenly, add water to adjust the viscosity suitable for construction, and let it stand for 5 minutes , that is, high hardness, quick-drying water-based two-component filling clear primer.

Embodiment 3

[0076] Mix component A-proportion B and component B-proportion A according to the equivalent ratio of n(-NCO):n(-OH)=1.6, mix evenly, add water to adjust to a suitable viscosity for construction, and let it stand for 5 minutes , that is, high hardness, quick-drying water-based two-component filling clear primer.

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Abstract

The invention provides a high-hardness and quick-drying water-based two-component filling clear primer. The high-hardness and quick-drying water-based two-component filling clear primer comprises a component A and a component B which are uniformly mixed according to an equivalent ratio of n (-NCO) to n (-OH) of 1.5-1.8, wherein the component A is prepared from the following components in percentage by weight: 75.0 to 80.0 percent of water-based acrylic emulsion; 0.8%-1.0% of an antifoaming agent, 4.0%-6.0% of a coalescing agent, 3.0%-6.0% of filling powder, 0.2%-0.3% of a wetting leveling agent, 0.4%-0.6% of an anti-settling agent, 0.1%-0.5% of a thickener, 2.0%-5.0% of a polishing agent and 2.0%-10.0% of water. And the component B is prepared from the following components in percentage byweight: 30%-40% of modified IPDI polyisocyanate and 60%-70% of modified HDI polyisocyanate. The -OH in the primer emulsion component and -NCO in the curing agent component are subjected to a deep cross-linking reaction to generate a urethane bond, the coating film is compact, and the hardness of the paint film is improved. In addition, the minimum film forming temperature MFFT is larger than or equal to 30 DEG C, the high drying speed is provided for a product system, and the requirement for changing oil into water in solid wood paint can be met; the invention also provides a preparation method of the water-based two-component filling clear primer.

Description

technical field [0001] The invention relates to the technical field of paint production, in particular to a high-hardness, fast-drying water-based two-component filling clear primer and a preparation method thereof. Background technique [0002] As the country's environmental protection requirements for the paint chemical industry are getting higher and higher, the use of oil-based paints has been banned in many provinces and cities. Water-based paints are favored in the market due to low pollution, low VOC emissions and even no VOC emissions. [0003] While the household industry and the paint chemical industry are carrying out a comprehensive "oil-to-water" transformation, the technical challenges of water-based paint are also increasing. In the solid wood furniture industry, the substrates are mostly multi-duct wood such as rubber wood and walnut, and the craftsmanship is mostly fully enclosed and transparent. The traditional oil-based paint technology used before has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/63C09D7/65C08G18/62
CPCC09D175/04C09D7/63C09D7/65C09D7/69C09D5/002C08G18/6225C08L23/12C08K5/06
Inventor 梁杰新林伟群郑建鹏
Owner HUIZHOU CHANGRUNFA PAINT
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