High-hardness scratch-resistant double-component waterborne polyurethane woodwork varnish and preparation method thereof

A water-based polyurethane and wood varnish technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of difficult construction, long drying time, hardness and wear resistance not as good as solvent-based coatings, etc.

Inactive Publication Date: 2013-01-30
中山蓝海洋水性涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two-component water-based wood coatings currently on the market still have disadvantages such as short storage period, long drying time, difficult construction, hardness and wear resistance far inferior to solvent-based coatings. Therefore, it is necessary to develop high-performance water-based two-component coatings that meet customer requirements. It is imperative to divide wood coatings

Method used

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  • High-hardness scratch-resistant double-component waterborne polyurethane woodwork varnish and preparation method thereof
  • High-hardness scratch-resistant double-component waterborne polyurethane woodwork varnish and preparation method thereof
  • High-hardness scratch-resistant double-component waterborne polyurethane woodwork varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The additives include weight component content: 5% film-forming aid, 0.9% thickener, 0.3% preservative, 0.3% anti-fungal agent, 0.3% anti-blocking agent, and 0.1% leveling agent.

[0075] The preparation method of embodiment 1 is:

[0076] a. Prepare the main paint of component A: first add water and hydroxyl polyacrylate dispersion resin with a total weight of 10% of water in the dispersion tank, and carry out medium-speed dispersion at 800r / min, then evenly mix in dispersant and glass powder, After dispersing at a high speed of 1500r / min for 15 minutes, add anti-scratch wax additives, organic bismuth / zinc composite catalyst, defoamer, wetting agent and other components, and disperse at a medium speed for 15 minutes, then take a sample to test the fineness of the finished product with viscosity, filtration, canning, packaging;

[0077] b. Preparation of component B curing agent: Add propylene glycol ether acetate and allophanate modified HDI trimer in sequence in the ...

Embodiment 2

[0080] The additives include weight components: 4% film-forming aid, 0.7% thickener, 0.1% preservative, 0.1% antifungal agent, 0.2% anti-blocking agent, and 0.05% leveling agent.

[0081] The preparation method of embodiment 2 is:

[0082] a. Prepare the main paint of component A: first add water and hydroxyl polyacrylate dispersion resin with a total weight of 15% of water in the dispersion tank, and carry out medium-speed dispersion at 700r / min, then evenly mix in dispersant and glass powder, After dispersing at a high speed of l300r / min for 20 minutes, add anti-scratch wax additives, organic bismuth / zinc composite catalyst, defoamer, wetting agent and other components, and disperse at a medium speed for 20 minutes, then take a sample to test the fineness of the finished product with viscosity, filtration, canning, packaging;

[0083] b. Preparation of component B curing agent: Add propylene glycol ether acetate and allophanate modified HDI trimer in sequence in the dispers...

Embodiment 3

[0086] The additives include weight component content: 2.7% of film-forming aids, 0.5% of thickeners, 0.15% of preservatives, 0.15% of antifungal agents, and 0.15% of anti-blocking agents.

[0087] The preparation method of embodiment 3 is:

[0088] a. Prepare the main paint of component A: first add water and hydroxyl polyacrylate dispersion resin with a total weight of 20% of water in the dispersion tank, and carry out medium-speed dispersion at 600r / min, then evenly mix in dispersant and glass powder, After dispersing at a high speed of 1000r / min for 25 minutes, add anti-scratch wax additives, organic bismuth / zinc composite catalyst, defoamer, wetting agent and other components, and disperse at a medium speed for 25 minutes, then take a sample to test the fineness of the finished product with viscosity, filtration, canning, packaging;

[0089] b. Preparation of component B curing agent: Add propylene glycol ether acetate and allophanate modified HDI trimer in sequence in t...

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Abstract

The invention discloses high-hardness scratch-resistant double-component waterborne polyurethane woodwork varnish and a preparation method thereof. The varnish consists of double components, i.e., a primer and a curing agent, wherein the primer consists of hydroxyl polyacrylate dispersion resin, dispersant, nano-scale silicon dioxide glass powder, a scratch-resistant wax auxiliary agent, an organic bismuth/zinc composite catalyst, an antifoaming agent, a wetting agent, water and an additive, wherein the sum of the weight percentages of the A components is 100 percent; the curing agent consists of propylene glycol ethyl ether acetate and allophanate modified HDI (Hexamethylene Diisocyanate) tripolymer; the sum of the weight percentages of the B components is 100 percent; and the A components and the B components are mixed according to the equivalent molar ratio of n-NCO:n-OH as 1.38:1.62. The varnish has the advantages of high hardness, shortened surface drying time and hard drying time, long activation period, superior performance, environmental friendliness of the product and high operability.

Description

【Technical field】 [0001] The invention relates to a high-hardness scratch-resistant two-component waterborne polyurethane wood varnish and a preparation method thereof. 【Background technique】 [0002] Wood coatings are divided into oil-based wood coatings and water-based wood coatings due to their different dispersion media. Oil-based wood coatings are commonly known as wood paints. It uses various organic solvents such as benzene, ketones, esters, ethers, etc. as dispersion media. During the production process, application process and drying process, it is continuously volatilized into the air or absorbed by the human body, which seriously damages the environment and harms human health. Water-based wood coatings use water as the dispersion medium, completely eliminate the harm of organic solvents to the human body, and have incomparable advantages over traditional oil-based coatings, such as health and environmental protection, low-carbon energy saving, high utilization ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08
Inventor 陈小文蒋建平肖国钦
Owner 中山蓝海洋水性涂料有限公司
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