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High-hardness high-fullness low-curing-agent water-based two-component woodware varnish and preparation method thereof

A water-based two-component, curing agent technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of short pot life of paint liquid, poor stability, limited production capacity of water-based curing agent, etc., and achieve long pot life , construction tolerance improvement, excellent anti-heat rash effect

Inactive Publication Date: 2022-03-18
福建省三棵树新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The common high-hardness and high-fullness water-based two-component wood clear finishes on the market need to add more water-based curing agents, generally 20-30%. The production capacity of water-based curing agents is limited, the price is expensive, and the coating cost increases significantly.
[0005] Currently commonly used water-based curing agents contain a certain amount of solvents, usually 20-30%. The addition of high water-based curing agents will inevitably lead to an increase in VOC content, which is not conducive to environmental protection and health
[0006] In the case of high addition of water-based curing agent, the activation period of the paint liquid is short; the paint film dries slowly, the hardness rises slowly, and the production efficiency is low; thick coating and high temperature and low humidity conditions are prone to paint film defects such as prickly heat
[0007] Most water-based one-component emulsions for woodware cannot be used in water-based two-component coatings, because the stability of the emulsion particles becomes poor when they encounter isocyanate with a certain plasticizing effect, and they gel quickly and the pot life is very short.

Method used

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  • High-hardness high-fullness low-curing-agent water-based two-component woodware varnish and preparation method thereof
  • High-hardness high-fullness low-curing-agent water-based two-component woodware varnish and preparation method thereof
  • High-hardness high-fullness low-curing-agent water-based two-component woodware varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of a water-based two-component wood varnish with high hardness, high fullness and low curing agent, comprising the steps of:

[0053] The preparation method of the A component is as follows:

[0054] Step 1: Put silicone-modified hydroxyacrylic emulsion, acrylic-modified polyurethane emulsion, defoamer, wetting agent, dispersant, hand feeling agent, anti-scratch agent and matting agent into the dispersion tank according to the formula amount, at 1200r Disperse at 1 / min for 30 minutes, until the system is in a uniform state, the fineness is ≤30 μm, there is no oil shrinkage and the surface of the board is uniform and no abnormality;

[0055] Step 2: Add coalescent, water, thickener, bactericide and antifungal agent according to the formula, and then disperse at 600r / min for 15min;

[0056] Step 3: Add raw material leveling agent, thickener and antifungal agent according to the formula, disperse at 1000r / min for 15min, and get the A component after t...

Embodiment 2

[0061] A preparation method of a water-based two-component wood varnish with high hardness, high fullness and low curing agent, comprising the steps of:

[0062] The preparation method of the A component is as follows:

[0063] Step 1: Put silicone-modified hydroxyacrylic emulsion, acrylic-modified polyurethane emulsion, defoamer, wetting agent, dispersant, hand feeling agent, anti-scratch agent and matting agent into the dispersion tank according to the formula, at 1500r Disperse for 20 minutes at 1 / min until the system is in a uniform state, the fineness is ≤30 μm, there is no oil shrinkage and the surface of the board is uniform and no abnormality;

[0064] Step 2: Add coalescent, water, thickener, bactericide and antifungal agent according to the formula, and then disperse at 800r / min for 10min;

[0065] Step 3: Add raw material leveling agent, thickener and antifungal agent according to the formula, disperse at 1200r / min for 10min, and get the A component after the visco...

Embodiment 3

[0070] A preparation method of a water-based two-component wood varnish with high hardness, high fullness and low curing agent, comprising the steps of:

[0071] The preparation method of the A component is as follows:

[0072] Step 1: Put silicone-modified hydroxyacrylic emulsion, acrylic-modified polyurethane emulsion, defoamer, wetting agent, dispersant, hand feeling agent, anti-scratch agent and matting agent into the dispersion tank according to the formula, at 1300r Disperse for 25 minutes at 1 / min, until the system is in a uniform state, the fineness is ≤30 μm, there is no oil shrinkage and the surface of the board is uniform and no abnormality;

[0073] Step 2: Add film-forming aids, water, thickeners, bactericides and anti-fungal agents according to the formula, and then disperse at 700r / min for 10-15min;

[0074] Step 3: Add raw material leveling agent, thickener and antifungal agent according to the formula, disperse at 1100r / min for 12min, and get the A component ...

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Abstract

The invention relates to a high-hardness, high-fullness and low-curing agent water-based two-component woodware varnish and a preparation method thereof, and the high-hardness, high-fullness and low-curing agent water-based two-component woodware varnish comprises a component A and a component B, the component A is prepared from the following components: organic silicon modified hydroxy acrylic emulsion, acrylic acid modified polyurethane emulsion, a defoaming agent, a wetting agent, a dispersing agent, a hand feeling agent, a scratch-resistant agent, a matting agent, a coalescing agent, water, a sterilizing agent, a mildew preventive, a flatting agent and a thickening agent; the component B is prepared from the following components in parts by mass: a water-based isocyanate curing agent and an ester solvent. The high-hardness, high-fullness and low-curing agent water-based double-component woodware varnish disclosed by the invention is high in hardness, high in fullness and long in activation period, and miliaria is not easy to occur when the varnish is thickly coated.

Description

technical field [0001] The invention relates to a high-hardness, high-fullness, low-curing agent water-based two-component wood varnish and a preparation method thereof. Background technique [0002] At present, the country's control of harmful substances is becoming more and more strict and refined; at the same time, consumers' awareness of health and environmental protection is becoming stronger and stronger. Water-based wood coatings have gradually become the main force leading the innovation of the wood coatings market. However, in high-end furniture companies, especially in the solid wood custom furniture market, customers have high requirements in terms of performance, especially hardness (above 1H), fullness (full paint film, strong oily feeling), water resistance (above grade 4), etc. However, ordinary water-based wood paints cannot meet the above requirements due to the technical bottleneck of raw materials and insufficiently fine paint formulation design: the hard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/14C09D7/61
CPCC09D175/04C09D175/14C09D7/61C08K2003/2227C08K2201/011C08L2207/53C08L75/14C08K3/22C08K3/36C08L75/04
Inventor 罗新强许伟东魏建军
Owner 福建省三棵树新材料有限公司