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Waterborne polyurethane acrylate wood lacquer free of VOCs and preparation method thereof

A polyurethane acrylate and wood paint technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor coating adhesion and weather resistance, limited application, etc., to achieve convenient post-processing, controllable surface groups, and cost. low effect

Inactive Publication Date: 2019-10-22
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with the publication number CN109096900A discloses a water-based wood coating with zero VOC volatilization, but the poor adhesion and weather resistance of this coating has a certain gap compared with traditional oil-based paints, which largely limits its use in wood. Applications in the field of furniture

Method used

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  • Waterborne polyurethane acrylate wood lacquer free of VOCs and preparation method thereof
  • Waterborne polyurethane acrylate wood lacquer free of VOCs and preparation method thereof
  • Waterborne polyurethane acrylate wood lacquer free of VOCs and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step (1): Preparation of waterborne polyurethane acrylate resin

[0040] Put 34 parts by weight of PTMG-2000 in a 250mL four-necked flask equipped with a mechanical stirrer, a thermometer, a condenser, and a dropping funnel, and vacuum dehydrate it in an oil bath at a temperature of 110°C for 90 minutes; after cooling down to 75°C, Under nitrogen protection, 40 parts by weight of isophorone diisocyanate and 0.5 parts by weight of dibutyltin dilaurate were slowly added dropwise, and the reaction was kept for 60 minutes under low-speed stirring; after the temperature was raised to 80°C, 6 parts by weight of 2 , 2-Dimethylol propionic acid, stirred at a constant speed and kept warm for 90 minutes until the theoretical NCO value of the prepolymer measured by di-n-butylamine titration was reached to obtain a hydrophilic polyurethane.

[0041]Cool down to 60°C, drop 12 parts by weight of hydroxyethyl methacrylate into the prepared hydrophilic polyurethane, and keep it at 60°C...

Embodiment 2

[0048] A zero-VOC water-based polyurethane acrylate wood lacquer and a preparation method thereof, is characterized in that the raw materials used for its preparation are calculated in parts by weight, and its composition and content are as follows:

[0049] Step (1): Preparation of waterborne polyurethane acrylate resin

[0050] Put 35 parts by weight of PTMG-2000 in a 250mL four-necked flask equipped with a mechanical stirrer, a thermometer, a condenser, and a dropping funnel, and vacuum dehydrate it in an oil bath at a temperature of 110°C for 90 minutes; after cooling down to 75°C, Under nitrogen protection, 40 parts by weight of isophorone diisocyanate and 0.5 parts by weight of dibutyltin dilaurate were slowly added dropwise, and the reaction was kept for 60 minutes under low-speed stirring; after the temperature was raised to 80°C, 6 parts by weight of 2 , 2-Dimethylol propionic acid, stirred at a constant speed and kept warm for 90 minutes until the theoretical NCO val...

Embodiment 3

[0059] A zero-VOC water-based polyurethane acrylate wood lacquer and a preparation method thereof, is characterized in that the raw materials used for its preparation are calculated in parts by weight, and its composition and content are as follows:

[0060] Step (1): Preparation of waterborne polyurethane acrylate resin

[0061] Put 30 parts by weight of PTMG-2000 in a 250mL four-necked flask equipped with a mechanical stirrer, a thermometer, a condenser, and a dropping funnel, and vacuum dehydrate it in an oil bath at a temperature of 110°C for 90 minutes; after cooling down to 75°C, Under nitrogen protection, 40 parts by weight of isophorone diisocyanate and 0.5 parts by weight of dibutyltin dilaurate are slowly added dropwise, and the reaction is kept for 60 minutes under low-speed stirring; after the temperature is raised to 80°C, 7 parts by weight of 2 , 2-Dimethylol propionic acid, stirred at a constant speed and kept warm for 90 minutes until the theoretical NCO value ...

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Abstract

The invention provides a waterborne polyurethane acrylate wood lacquer free of VOCs and a preparation method thereof. The waterborne polyurethane acrylate wood lacquer free of VOCs is characterized bycomprising the following raw materials by weight: 50-80 parts of polyurethane acrylate resin, 2-4 parts of a film-forming aid, 1-3 parts of a thickening agent, 5-20 parts of a pigment and filler, 1-2parts of a leveling agent, 0.2-1 part of a defoaming agent and 10-30 parts of deionized water. The waterborne polyurethane acrylate wood lacquer of the invention has high solvent resistance and strong adhesion.

Description

technical field [0001] The invention relates to a zero-VOC waterborne polyurethane acrylate wood paint and a preparation method thereof, belonging to the technical field of environmental protection paint. Background technique [0002] Water-based wood lacquer is an environmentally friendly coating composed of base resin as film-forming substance, thickener, wetting agent, leveling agent, etc. Among them, water-based polyurethane acrylate wood paint has the advantages of good weather resistance, high hardness, low cost and water-based polyurethane resin wood paint. Coating of wooden doors, dining tables, floors and high-end furniture. [0003] Traditional waterborne urethane acrylate resins have the characteristics of high solid content and high viscosity. In order to increase its solid content, the viscosity of the system will increase sharply during the preparation process, and it is necessary to add a volatile organic solvent to reduce the viscosity of the system (such a...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/65C09D7/61C09D7/20C08G18/67C08G18/66C08G18/48C08G18/34
CPCC08G18/348C08G18/48C08G18/672C08K2003/2241C08L2205/035C09D175/14C09D7/20C09D7/61C09D7/65C08L79/02C08K3/22C08G18/4854C08G18/6692
Inventor 贾润萍惠资徐小威刘珂刘新王大洋黄志雄赵呈
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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