Polyurethane acrylate dispersoid and preparation method thereof, and high-performance water-based wood coating and preparation method thereof

A polyurethane acrylate and acrylate technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as high reaction temperature, difficult control, complex process, etc., and achieve good flexibility, good anti-blocking, and high transparency Effect

Active Publication Date: 2022-02-15
CARPOLY CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first step of the method is an alkyd reaction, the reaction temperature is high and difficult to control; at the same time, a large amount of solvent and vacuuming are required to remove water, and the process is complicated

Method used

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  • Polyurethane acrylate dispersoid and preparation method thereof, and high-performance water-based wood coating and preparation method thereof
  • Polyurethane acrylate dispersoid and preparation method thereof, and high-performance water-based wood coating and preparation method thereof
  • Polyurethane acrylate dispersoid and preparation method thereof, and high-performance water-based wood coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A polyurethane acrylate dispersion 1, which is prepared by the following steps:

[0049] S1. In parts by mass, mix 11.7 parts of acrylic acid, 23 parts of methyl methacrylate, 20 parts of styrene, 8.7 parts of butyl acrylate, 5 parts of isobornyl acrylate and 1.5 parts of di-tert-amyl peroxide Form mixed solution A1 for later use;

[0050] S2. In parts by mass, 2.1 parts of ethylenediamine and 17.9 parts of deionized water are uniformly mixed to form a mixed solution B1 for later use;

[0051] S3. Add 10 parts of polyether diols and 30 parts of glycidyl tertiary carbonate monomers into a four-necked flask equipped with a thermometer, condenser, stirring paddle and constant pressure dropping funnel, mix and heat, when the temperature reaches 145 After ℃, start to add the mixed solution A1 dropwise, and finish dropping in 4 hours. After dropping, stir and keep warm for 30 minutes, cool down to 80°C, add 23.6 parts of isophorone diisocyanate, NCO / OH is 1.5, stir for 5 min...

Embodiment 2

[0060] A polyurethane acrylate dispersion 2, which is prepared by the following steps:

[0061] S1. In parts by mass, 13.5 parts of methacrylic acid, 18 parts of methyl methacrylate, 17 parts of styrene, 12 parts of butyl acrylate, 8 parts of isobornyl methacrylate and 2 parts of di-tert-amyl peroxide The oxides are mixed evenly to form a mixed solution A2, which is set aside;

[0062] S2. In terms of parts by mass, 7.1 parts of isophoronediamine and 22.9 parts of deionized water are mixed evenly to form a mixed solution B2, which is set aside;

[0063] S3. add 12 parts of polybutylene adipate glycols and 25 parts of 4-t-butyl glycidyl benzoate in the four-necked flask equipped with thermometer, condenser, stirring paddle and constant pressure dropping funnel, Mix and stir and heat. When the temperature reaches 140°C, start to add the mixed solution A2 dropwise. After 4.5 hours, stir and keep warm for 30 minutes. Cool down to 80°C, add 17.6 parts of toluene diisocyanate, NCO / ...

Embodiment 3

[0073] A polyurethane acrylate dispersion 3, which is prepared by the following steps:

[0074] S1. In terms of parts by mass, mix 11 parts of acrylic acid, 25 parts of methyl methacrylate, 14.5 parts of styrene, 7 parts of butyl acrylate, 10 parts of tertiary vinyl carbonate and 2.5 parts of di-tert-amyl peroxide Form the mixed solution A3 for later use;

[0075] S2. In terms of parts by mass, 3.8 parts of hexamethylenediamine and 16.2 parts of deionized water are uniformly mixed to form a mixed solution B3 for later use;

[0076]S3. Add 7 parts of polycarbonate diols and 35 parts of glycidyl stearate in a four-necked flask equipped with a thermometer, condenser, stirring paddle and constant pressure dropping funnel, mix and heat, when the temperature reaches 150 After ℃, start to add the mixed solution A3 dropwise, and finish dropping in 5 hours. After dropping, stir and keep warm for 20 minutes, cool down to 75°C, add 22 parts of diphenylmethane diisocyanate, NCO / OH is 1.6...

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Abstract

The invention discloses a polyurethane acrylate dispersoid and a preparation method thereof. The preparation method comprises the following steps of: mixing 11-14.8 parts of a (methyl) acrylic monomer, 30-35 parts of a (methyl) acrylate monomer, 8.9-22 parts of a vinyl monomer, 5-15 parts of an acrylate functional monomer and 1.5-2.5 parts of an initiator to form a mixed solution A; dispersing 1.5-7.1 parts of an amine chain extender to form a mixed solution B; mixing 8.5-20 parts of macromolecular dihydric alcohol and 20-35 parts of a reactive diluent, dropwise adding the mixed solution A at 140-150 DEG C, and preserving heat; cooling to 75-85 DEG C, sequentially adding 14.2-23.6 parts of an isocyanate chain extender and 3.2-7.7 parts of a neutralizing agent for reaction, and heating to 75-85 DEG C for reaction after the -NCO content is tested to be 2.8-3.9 wt%; and cooling to 55-75 DEG C, adding 20-30 parts of the mixed solution B, reacting, cooling to 40 DEG C, and filtering. The polyurethane acrylate dispersoid is large in molecular weight, is of a net-shaped structure, and is high in solid content and good in storage stability.

Description

technical field [0001] The invention relates to the field of preparation of water-based coatings, in particular to a polyurethane acrylate dispersion and a preparation method thereof, a high-performance water-based wood coating and a preparation method thereof. Background technique [0002] The surfaces of many objects require coatings for protection, decoration and special functions. Most of the existing wood coatings are solvent-based coatings, which contain more than 50% organic solvents. These solvents will volatilize into the atmosphere during the construction process to pollute the environment and damage human health, and organic solvents themselves will bring safety hazards. In 2015, 1 my country has issued a decree on the collection of consumption tax on solvent-based coatings in March. Therefore, the water-based coating of wood is the development trend of international coatings. Water-based wood coatings include one-component and two-component water-based wood coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/62C09D175/08C09D175/04C09D175/06
CPCC08G18/625C09D175/08C09D175/04C09D175/06
Inventor 段晓俊彭刚阳罗建华朱延安
Owner CARPOLY CHEM GRP
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