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New UV curable high hardness waterborne wood paint

A water-based wood paint, ultraviolet light technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of limited application, poor wear resistance, low hardness, etc.

Inactive Publication Date: 2018-12-21
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, compared with traditional solvent-based wood coatings, the application of UV-curable water-based wood coatings is limited due to the relatively low hardness and non-wear resistance. This functional defect directly limits its wide application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] 1. Add 26 grams of isophorone diisocyanate (IPDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG) into a 500ml three-necked flask equipped with a stirring blade, condenser and nitrogen protection at 80°C. Add 0.02 g of dibutyltin dilaurate as an initiator, and keep it at 70-80°C for 40-50 minutes.

[0043] 2. Add 7 grams of 2,2-dimethylolpropionic acid and a small amount of N,N-dimethylacetamide, and react for 2 hours. During the reaction, use acetone to adjust the viscosity.

[0044] 3. Cool down so that the temperature in the three-necked flask is 40~48℃.

[0045] 4. Add 7 grams of quaternary tetraol triacrylate and continue the reaction for 30 minutes.

[0046] 5. After 30 minutes, add 20 grams of bis-quaternary tetraol hexaacrylate and 20 grams of dipropylene glycol diacrylate, adjust the temperature to 60°C, and react for 2 hours.

[0047] 6. Add 3g of organic montmorillonite after two hours and stir for 30 minutes.

[0048] 7. After 30 minutes, cool down ...

example 2

[0051] 1. Add 16.3 grams of toluene diisocyanate (TDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG) into a 500ml three-necked flask equipped with a stirring blade, condenser and nitrogen protection, and add 0.02 grams of dilauric acid Dibutyltin was used as an initiator, and 3 g of organic montmorillonite was added and stirred at 90°C for 40-50 minutes.

[0052] 2. Add 5 grams of 2,2-dimethylolpropionic acid and a small amount of N,N-dimethylacetamide, and react for 1 hour. Acetone can be used to adjust the viscosity during the reaction.

[0053] 3. Add 31 g of hydroxyethyl acrylate after cooling to 50℃, heating to 80℃, and reacting for two hours

[0054] 4. Cool down to 40℃, add triethylamine, organic montmorillonite and a small amount of deionized water to neutralize and disperse to obtain a light-curing water-based resin with a solid content of 75%

[0055] This example is basically the same as the process route of example 1, but the ratio of NCO / -OH is relati...

example 3

[0057] 1. Add 43 grams of isophorone diisocyanate (IPDI) and 40 grams of dehydrated polytetrahydrofuran ether glycol (PTMG) into a 500ml three-necked flask equipped with a stirring blade, condenser and nitrogen protection at 80°C. Add 0.02 g of dibutyltin dilaurate as an initiator, and keep it at 70-80°C for 40-50 minutes.

[0058] 2. Add 7 grams of 2,2-dimethylolpropionic acid and a small amount of N,N-dimethylacetamide, and react for 2 hours. During the reaction, use acetone to adjust the viscosity.

[0059] 3. Cool down so that the temperature in the three-necked flask is 40~48℃.

[0060] 4. Add 5 grams of hydroxyethyl methacrylate and continue to react for 30 minutes

[0061] 5. After 30 minutes, add 20 grams of bis-quaternary tetraol hexaacrylate and 20 grams of dipropylene glycol diacrylate, adjust the temperature to 60°C, and react for 2 hours.

[0062] 6. Add 8g of organic montmorillonite after two hours and stir for 30 minutes.

[0063] 7. After 30 minutes, cool down to 40°C an...

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PUM

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Abstract

The invention provides UV curable high hardness waterborne wood paint, characterized in that the tensile strength is up to 39.6Mpa, the elongation at break is 120 percent, and the pencil hardness is 3H. The tensile strength of blank polyurethane is 9.8MPa, the elongation at break is 220 percent, and the pencil hardness is HB. The tensile strength of the UV curable high hardness waterborne wood paint is increased by four times. The invention provides a preparation method of the UV curable high hardness waterborne wood paint; a raw material thereof is cheap and easy to get, and a production device is simple.

Description

Technical field [0001] The invention belongs to the technical field of chemical products and relates to a wood coating. Background technique [0002] In recent years, UV-curable coatings have been recognized by the world's coatings industry and most management organizations due to their high efficiency and energy-saving advantages. In recent years, they have been widely used in the fields of wood products, furniture and wooden doors. However, the existing UV-curable coatings still have some disadvantages: for example, the diluting monomer and other multi-functional acrylic esters contain volatile organic compounds, which are harmful to the environment and the human body. Although it can be improved by polymerizing functional groups High solid content UV curing coatings can be prepared to reduce VOC emissions. However, due to the dependence of product viscosity on molecular weight, low molecular weight products will cause the system viscosity to be too large and difficult to adjus...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/61
CPCC09D175/14C09D7/61C08K3/346
Inventor 周超江龙王琳慧
Owner CHANGCHUN UNIV OF TECH