Novel polyurethane semi-matte white finish for woodware protection

A polyurethane and white topcoat technology, applied in the field of semi-matte white topcoat, can solve the problems of poor yellowing resistance of the paint film, affect the quality of decoration, and have a great impact, achieve full paint film, speed up drying and film formation, space Low steric hindrance

Inactive Publication Date: 2011-02-09
JIANGSU CHAMPION TECHNOLOGY GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] For the two-component polyurethane wood paints prepared on the market today, the main paint is generally made of vegetable oil short oil alkyd resin as the base material, and the curing agent is generally made of toluene diisocyanate or its trimer. The main paint and curing agent are in proportion The mixed and cured paint film has the following defects: (1) the aromatic urethane bonds in the polyurethane are easily oxidized by ultraviolet rays to quinones and turn yellow; (2) a small amount of unsaturated double bonds in vegetable oil oleoresins are oxidized by ultraviolet rays and turn yellow Yellow, resulting in poor yellowing resistance of the paint film, and the yellowing resistance (UVA, 168 hours) ΔE color difference is more than 10.0, which affects the decoration quality
[0003] The wood lacquers on the market are greatly affected by the hydroxyl value of alkyd resins. The wood lacquers prepared with low hydroxyl value resins dry quickly and have good elasticity, water resistance and gloss retention. However, the alkyd resins currently on the market The hydroxyl value is basically around 120mgKOH / g, the hydroxyl value is high, and the viscosity is high. Although the prepared wood paint has high hardness at room temperature and good gasoline resistance, it has poor water resistance and is easy to crack.
[0004] Traditional wood lacquers generally use m (paint): m (curing agent): m (thinner) = 1:0.5:1. More curing agents need to be added to achieve the construction effect, which is costly and not environmentally friendly. Therefore, it is urgent to develop a Anti-yellowing, environmentally friendly, low-cost semi-dull white topcoat with superior performance

Method used

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  • Novel polyurethane semi-matte white finish for woodware protection
  • Novel polyurethane semi-matte white finish for woodware protection
  • Novel polyurethane semi-matte white finish for woodware protection

Examples

Experimental program
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Effect test

preparation example Construction

[0053] 1. Preparation of stearic acid modified short oil alkyd resin I

[0054] 596.05kg of refined oleic acid, 357.63kg of 1081 stearic acid, 157.36kg of benzoic acid, 298.03kg of diethylene glycol, 59.06kg of TMP, 298.03kg of glycerin (95.0%), and 576.44kg of pentaerythritol were put into the reactor, and then 1788.15kg of phthalic anhydride was added. Afterwards, when the temperature is lower than 80°C, add 5.96kg antioxidant, reflux with 119.21kg xylene, heat up, and pass carbon dioxide (when the temperature rises to 170°C, stop ventilation), when the temperature rises to 120°C, start stirring At the same time turn on the return cooling water. Control the voltage so that it takes 2.0 hours to rise to 170°C and keep it warm for 1.0 hours. Continue to raise the temperature so that it takes 2.5 hours to rise to 200°C, then rise to 210°C, and reflux at a constant temperature. After the reaction until the acid value is less than or equal to 12mgKOH / g, lower the temperature. ...

Embodiment 1

[0062] With 387.39kg stearic acid modified alkyd resin I, 108.95kg polyketone resin solution (concentration 50%), 1.21kg defoamer SS-220, 1.21kg defoamer 5300, 12.11kg anti-settling agent 50% 6900, Add 2.42kg dispersant AF4010, 472.13kg411 white flour paste into the reaction tank, and disperse at a speed of 500-800r / min for 5-10min; Disperse at 1000~1200r / min until the material fineness is ≤25μm; after adding 145.27kg 20% ​​VAGH vinyl chloride resin, 3.63kg leveling agent BYK306, 6.05kg anti-yellowing additive KH-18, 2.42kg deodorant, Disperse at 500~800r / min for 5~10min; finally adjust the viscosity with 32.69kg butyl ester, adjust the viscosity of the material to 1000±200mPa·s / 25℃, and sieve the material with a 200-mesh sieve without sieve residue, it is qualified, qualified After packing in cans for later use, the developed semi-dull white topcoat can be obtained upon arrival, and its appearance is a white milky liquid.

Embodiment 2

[0064] 402.76kg stearic acid modified alkyd resin II, 130.09kg polyketone resin solution (concentration 45%), 2.30kg defoamer SS-220, 13.81kg anti-settling agent 50% 6900, 5.75kg dispersant AF4010, 402.76 Add kg411 white flour paste into the reaction tank and disperse at a speed of 500-800r / min for 5-10 minutes; then add 17.26kg of hand wax powder 1400SF and 57.54kg of new air-soluble matting powder TSS-110, and disperse at a speed of 1000-1200r / min until the material fineness is ≤25μm; add 92.06kg 20% ​​VAGH vinyl chloride resin, 2.30kg leveling agent BYK306, 9.21kg anti-yellowing additive KH-18, 1.15kg deodorant, and disperse at a speed of 500-800r / min 5-10 minutes; finally adjust the viscosity with 5.75kg butyl ester, adjust the viscosity of the material to 1000±200mPa·s / 25℃, use a 200-mesh sieve to sieve the material without sieve residue, it is qualified. The developed semi-dull white finish was obtained, which was a white milky liquid in appearance.

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Abstract

The invention discloses novel polyurethane semi-matte white finish for woodware protection. The finish is prepared by mixing the following components: stearic acid modified alkyd resin, polyketone resin solution, an antifoaming agent, an anti-settling agent, a dispersing agent, white slurry, handfeel wax powder, aerosol extinction powder, 20 percent hydroxyl modified vinyl acetate (VAGH) resin, a leveling agent, an anti-yellowing auxiliary agent, a deodorant and butyl ester. A film prepared from the novel polyurethane semi-matte white finish has the advantages of fullness, moderate hardness, high flexibility, high water resistance, yellowing resistance and environmental protection; and the semi-matte white finish has high comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of wood ware paints for interior decoration, and in particular relates to an environment-friendly, anti-yellowing and low-cost semi-dull white finish paint with excellent performance. Background technique [0002] For the two-component polyurethane wood paints prepared on the market today, the main paint is generally made of vegetable oil short oil alkyd resin as the base material, and the curing agent is generally made of toluene diisocyanate or its trimer. The main paint and curing agent are in proportion The mixed and cured paint film has the following defects: (1) the aromatic urethane bonds in the polyurethane are easily oxidized by ultraviolet rays to quinones and turn yellow; (2) a small amount of unsaturated double bonds in vegetable oil oleoresins are oxidized by ultraviolet rays and turn yellow Yellow, resulting in poor yellowing resistance of the paint film, and the yellowing resistance (UVA, 168 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D175/06C08G63/676
Inventor 谢海
Owner JIANGSU CHAMPION TECHNOLOGY GROUP CO LTD
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