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A kind of aqueous UV polyurethane acrylate dispersion with self-initiating function and preparation method thereof

A polyurethane acrylate, self-initiating technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of adverse effects on product quality, slow curing rate, mixing and dispersion, etc., and achieve good storage stability and durability Good chemical properties and improved mechanical properties

Active Publication Date: 2019-11-05
HUNAN BANFERT NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant researchers have developed many self-initiating curing systems on this basis. However, the existing self-initiating materials have slow curing rates or have certain mixing and dispersion problems, which adversely affect the quality of later products.

Method used

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  • A kind of aqueous UV polyurethane acrylate dispersion with self-initiating function and preparation method thereof
  • A kind of aqueous UV polyurethane acrylate dispersion with self-initiating function and preparation method thereof
  • A kind of aqueous UV polyurethane acrylate dispersion with self-initiating function and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A water-based UV urethane acrylate dispersion with self-initiating function of the present invention and a preparation method thereof. The preparation method of this aqueous UV polyurethane acrylate dispersion comprises the following steps:

[0026] (1) Preparation of oligomers containing photoinitiating groups and terminal hydroxyl groups:

[0027] Add 24.6g of Darocurl 173 photoinitiator, 30g of acetone, and 0.08g of dibutyltin dilaurate into a single-necked flask, stir and dissolve at 60°C until it becomes a transparent liquid, and obtain a mixed solution of hydroxyl-containing photoinitiator, which is left to stand for use; Add 25.2g of 1,6-hexamethylene diisocyanate into the reaction vessel, raise the temperature to 65°C, add the mixed solution of hydroxyl-containing photoinitiator dropwise while stirring, control the dropping rate at 1.0 drops / second until all drops are completed, and raise the temperature to 70°C, Continue to react for 4.0h; when NCO% (the mass ...

Embodiment 2

[0032] A water-based UV urethane acrylate dispersion with self-initiating function of the present invention and a preparation method thereof. The preparation method of this aqueous UV polyurethane acrylate dispersion comprises the following steps:

[0033] (1) Preparation of oligomers containing photoinitiating groups and terminal hydroxyl groups:

[0034] Add 36.2g of Irgacure2959 photoinitiator, 35g of methyl ethyl ketone, and 0.15g of stannous octoate into a single-necked flask, stir and dissolve at 55°C to a transparent liquid, and obtain a mixed solution of hydroxyl-containing photoinitiator, which is left to stand for use; 36.5g Add isophorone diisocyanate into the reaction vessel, raise the temperature to 65°C, add the mixed solution of hydroxyl-containing photoinitiator dropwise while stirring, control the dropping rate at 1.0 drops / second until all drops are completed, raise the temperature to 75°C, and continue the reaction 3.0h; when the NCO% reaches the theoretica...

Embodiment 3

[0039] A water-based UV urethane acrylate dispersion with self-initiating function of the present invention and a preparation method thereof. The preparation method of this aqueous UV polyurethane acrylate dispersion comprises the following steps:

[0040] (1) Preparation of oligomers containing photoinitiating groups and terminal hydroxyl groups:

[0041] Add 45.4g of Irgacure184 photoinitiator, 45g of acetone, and 0.18g of dibutyltin dichloride into a single-necked flask, stir and dissolve at 50°C to a transparent liquid, and obtain a mixed solution of hydroxyl-containing photoinitiator, which is left to stand for use; Add 31.4g of dicyclohexylmethane diisocyanate into the reaction vessel, raise the temperature to 60°C, add the mixed solution of hydroxyl-containing photoinitiator dropwise while stirring, control the dropping rate at 1.0 drops / second until all drops are completed, and raise the temperature to 70°C , continue to react for 2.0h; when the NCO% reaches the theor...

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Abstract

The invention discloses an aqueous UV urethane acrylate dispersion with a self-initiation function and a preparation method of the dispersion. The aqueous UV urethane acrylate dispersion comprises the following constitution raw materials in parts by weight: 10-20 parts of polyester polyol or polyether polyol, 10-30 parts of diisocyanate, 2-10 parts of hydroxy carboxylic acid, 0.04-0.2 part of a catalyst, 5-15 parts of an organic solvent, 1-5 parts of hydroxycarbamide, 0.1-0.6 part of a polymerization inhibitor, 10-30 parts of a monohydroxy acrylate monomer, 15-35 parts of oligomer with a photo-initiation group and a terminal hydroxyl group, 1-5 parts of organic amine and 140-180 parts of deionized water. The aqueous UV urethane acrylate dispersion has functions of self initiation or co-initiation under the action of a trace amount of an initiator, is high in resin curing efficiency and can be deeply cured, and a dispersion film is good in surface scratching resistance, high in hardness, good in weather resistance and excellent in chemical resistance.

Description

technical field [0001] The invention relates to the technical field of water-based UV curing coatings, in particular to a water-based UV polyurethane acrylate dispersion with self-initiating function and a preparation method thereof. Background technique [0002] UV curing technology has developed rapidly due to its advantages of high efficiency, energy saving, and low emission. Photoinitiators are important components in traditional photocuring systems. Most of the currently used photoinitiators are aromatic compounds, which have certain toxicity. After being irradiated by ultraviolet light, a large number of undecomposed photoinitiator small molecules remain in the cured film, which will have adverse effects on the environment and contact personnel, and limit the application of photocuring technology in high-demand, high-standard industries and other fields. [0003] Self-initiating UV curing system, because it can generate free radicals to complete the crosslinking and cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D5/08C08G18/67C08G18/66C08G18/42C08G18/48C08G18/44C08G18/34C08G18/32
CPCC08G18/3293C08G18/348C08G18/4277C08G18/44C08G18/4854C08G18/6659C08G18/6692C08G18/6705C08G18/672C08G18/673C09D5/08C09D175/14
Inventor 谢佳武张冬明李新雄
Owner HUNAN BANFERT NEW MATERIALS TECH
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