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Water ultraviolet light curing epoxy acrylic ester grafted polyurethane and preparation method thereof

An epoxy acrylate, ultraviolet light technology, applied in epoxy resin coatings, coatings and other directions, can solve the problems of slow curing speed, limited application range, low hardness of paint film, etc., achieve fast curing speed, avoid volume shrinkage, High quality coating effect

Active Publication Date: 2009-04-01
广东佳景科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the modification of epoxy acrylate focused on improving its water-based properties. As a result, some other properties were sacrificed, mainly due to reduced curing speed, low paint film hardness, and poor water resistance. It can only be applied to general water-based inks and other fields. , which limits its scope of application
At the same time, polyurethane-acrylate is a photosensitive prepolymer resin with excellent performance, which also plays an important role in UV-curable coatings, but its price is too expensive, so it is currently only used for high-grade wooden furniture and wooden floor finishes. middle

Method used

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  • Water ultraviolet light curing epoxy acrylic ester grafted polyurethane and preparation method thereof
  • Water ultraviolet light curing epoxy acrylic ester grafted polyurethane and preparation method thereof
  • Water ultraviolet light curing epoxy acrylic ester grafted polyurethane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: A waterborne UV-curable epoxy acrylate grafted polyurethane prepared by the following method steps:

[0030] Step 1: Synthesis of epoxy acrylate resin: Add a certain amount of epoxy resin, polymerization inhibitor and catalyst into a three-necked flask equipped with a stirrer, condenser, and thermometer. The equivalent ratio of epoxy group to carboxyl group is 1:1. Add acrylic acid in the proportions, heat and stir. The temperature is raised to 90℃ within 0.5~1h, and after reaction for 2h, the temperature is rapidly raised to 110~120℃ for constant temperature reaction, and the acid value is sampled at regular intervals. When the acid value is less than or equal to 5mgKOH / g, the reaction is stopped. FT-IR (KBr) test: 913,1244 (epoxy group) disappeared; 1723 (C=O); 1611 (C=C); 3500 (OH) cm -1 ;

[0031] Step 2: Semi-addition of toluene 2, 4-diisocyanate (TDI) and unsaturated compound containing primary hydroxyl group:

[0032] Add a certain quality of toluene 2, 4-...

Embodiment 2

[0036] Example 2: A waterborne UV-curable epoxy acrylate grafted polyurethane is prepared by the following method steps:

[0037] Step 1: Synthesis of epoxy acrylate resin: Add a certain quality of epoxy resin, polymerization inhibitor and catalyst into a three-necked flask equipped with a stirrer, condenser, and thermometer. The equivalent ratio of epoxy group to carboxyl group is 1:1. Add acrylic acid in the proportions, heat and stir. The temperature is raised to 90℃ within 0.5~1h, and after reaction for 2h, the temperature is rapidly raised to 110~120℃ for constant temperature reaction, and the acid value is sampled at regular intervals. When the acid value is less than or equal to 5mgKOH / g, the reaction is stopped. FT-IR (KBr) test: 913,1244 (epoxy group) disappeared; 1723 (C=O); 1611 (C=C); 3500 (OH) cm -1 ;

[0038] Step 2: Semi-addition of toluene 2, 4-diisocyanate (TDI) and unsaturated compound containing primary hydroxyl group:

[0039] Add a certain quality of toluene 2...

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Abstract

The invention relates to the technical field of polymer materials, in particular to water based ultraviolet light-curable epoxy acrylate grafted polyurethane and a preparation method thereof; the water based ultraviolet light-curable epoxy acrylate grafted polyurethane firstly goes through the synthetic reaction of epoxy acrylate resin and the half addition reaction of alkyl aromatics isocyanate and undersaturation compounds containing primary hydroxyl group; and then self-emulsifiable transparent water based system with achromatic color to light yellow is produced by epoxy acrylate grafted polyurethane and the water based reaction thereof, namely, the polyurethane modified epoxy acrylate resin which can be cured by ultraviolet light and is applicable to water paint, printing ink. The water based ultraviolet light-curable epoxy acrylate grafted polyurethane is characterized by good chemicals resistance performance, low production cost, rapid curing speed, high paint film hardness and good water resisting property and can be applied to multiple fields.

Description

Technical field: [0001] The invention relates to the technical field of polymer materials, in particular to a waterborne ultraviolet light curing epoxy acrylate grafted polyurethane and a preparation method thereof. Background technique: [0002] With the increasing global attention to environmental protection and the development of green chemical technology, UV curing technology is increasingly sought after by the polymer materials industry. Ultraviolet curing is a method of using the energy of ultraviolet light to initiate polymerization and cross-linking reactions between the low-molecular prepolymer (or oligomer) in the polymerization system and the monomer molecule as a reactive diluent to obtain a solid material. The above is to achieve chemical drying by forming chemical bonds. The UV curing formula system usually includes oligomers that can undergo crosslinking reaction (curing) under the excitation of UV light, reactive diluent monomers, photoinitiators, and various auxi...

Claims

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Application Information

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IPC IPC(8): C08G59/14C08F299/02C08F2/48C09D163/10
Inventor 徐伟箭陈健强熊远钦郭曙安夏新年刘建忠
Owner 广东佳景科技股份有限公司
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