Polyurethane acrylate modified ultraviolet light cured water-dilutable resin and preparation method thereof

A technology of polyurethane acrylate and water-based resin, applied in the direction of coating, etc., can solve problems such as skin irritation, insufficient hardness and rigidity, and environmental pollution, and achieve reduced toxicity and irritation, good wear resistance and hardness, and excellent comprehensive performance Effect

Inactive Publication Date: 2016-07-13
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It is often necessary to add more low-molecular-weight diluents to light-curing coatings, but this can also cause the following problems: some diluents are harmful to the human body, and even harmless diluents form mist droplets during the spraying process that will pollute the environment , to irritate people's skin; when using light-cured coatings on some porous substrates, such as wood, cement, and paper, the diluent is easy to diffuse into the pores and cannot be cured, so that the object to be coated has a long-term odor; the diluent will be strong. Affe

Method used

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  • Polyurethane acrylate modified ultraviolet light cured water-dilutable resin and preparation method thereof
  • Polyurethane acrylate modified ultraviolet light cured water-dilutable resin and preparation method thereof
  • Polyurethane acrylate modified ultraviolet light cured water-dilutable resin and preparation method thereof

Examples

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Example Embodiment

[0041] Example 1

[0042] A urethane acrylate modified ultraviolet light curable waterborne resin, the structure of the urethane acrylate modified ultraviolet light curable waterborne resin is shown in formula (1):

[0043]

[0044] Among them, R1 and R2 are CH 2 CH 3 .

[0045] It is prepared by the following steps:

[0046] Step S1: Synthesis of partial esterification of acrylic acid and epoxy;

[0047] Add 500g of tetrabromobisphenol A epoxy resin in a 1000mL three-necked flask, and stir in the oil bath to 100℃; in addition, add the catalyst tetrakis (acetylacetone) zirconium complex and p-hydroxyanisole to the metered acrylic acid, and add them dropwise In the epoxy resin, the molar ratio of the epoxy group to the acrylic acid is 2:1, the mass percentage of the catalyst tetrakis (acetylacetone) zirconium complex is 0.7%, and the p-hydroxyanisole is The percentage by mass is 0.5%. After 4 hours of reaction, the acid value of the system is less than 3mgKOH / g by alkali titration, and...

Example Embodiment

[0055] Example 2

[0056] A urethane acrylate modified ultraviolet light curable waterborne resin. The structure of the urethane acrylate modified ultraviolet light curable waterborne resin is shown in formula (1), wherein R1 and R2 are CH 2 CH 2 CH 3 .

[0057] It is prepared by the following steps:

[0058] Step S1: Add 450g of bisphenol A epoxy (epoxy E44) into a 1000mL three-necked flask, bring the oil bath to 110°C, stir, add the catalyst triphenylphosphine and p-hydroxyanisole to the additional meter of acrylic acid, and add the ring dropwise In the oxygen resin, the molar ratio of epoxy groups to acrylic acid is 2:1, the mass percentage of the catalyst triphenylphosphine is 0.5%, and the mass percentage of the p-hydroxyanisole is 0.3 %, the acid value of the system is less than 3mgKOH / g after 3.5 hours of reaction, and the epoxy acrylate monoester of formula (2) is obtained;

[0059] Step S2: Add 2 mol of diphenylmethane diisocyanate (MDI) into a three-necked flask, and heat t...

Example Embodiment

[0063] Example 3

[0064] A urethane acrylate modified ultraviolet light curable waterborne resin. The structure of the urethane acrylate modified ultraviolet light curable waterborne resin is shown in formula (1), wherein R1 and R2 are CH 2 CH 2 OH.

[0065] It is prepared by the following steps:

[0066] Step S1: Add 220g of phenolic epoxy resin into a 500mL three-necked flask, and stir in the oil bath to 115°C; add the catalyst triethanolamine and p-hydroxyanisole to the additional metered acrylic acid, and add them dropwise to the epoxy resin, where, The molar ratio of epoxy groups to acrylic acid is 2:1, the mass percentage of the catalyst triethanolamine is 0.8%, and the mass percentage of the p-hydroxyanisole is 0.8%; after reacting for 3 hours, it passes through the alkali Titrated until the acid value of the system is less than 3mgKOH / g, the epoxy acrylate monoester of formula (2) is obtained;

[0067] Step S2: Add 2 mol of isophorone diisocyanate (IPDI) into a 1000 mL three...

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Abstract

The invention provides polyurethane acrylate modified ultraviolet light cured water-dilutable resin and a preparation method thereof.The structure of the polyurethane acrylate modified ultraviolet light cured water-dilutable resin is shown in the formula (1), wherein R1 represents CH3 or CH2CH3 or CH2CH2OH or CH2CH2CH3 or CH2CH2CH2CH3, and R2 represents CH3 or CH2CH3 or CH2CH2OH or CH2CH2CH3 or CH2CH2CH2CH3.According to the technical scheme, the resin structure is provided with a polyurethane flexible chain segment and an epoxy rigid chain segment, a cured film has good abrasion resistance and hardness, and the after-curing hardness is H or above; meanwhile, curing can be conducted by means of ultraviolet light, and use is more convenient; water can serve as a diluent, and the toxicity and irritation of a system are reduced.

Description

technical field [0001] The invention belongs to the technical field of organic polymer synthesis, and in particular relates to a polyurethane acrylate-modified ultraviolet-curable water-based resin and a preparation method thereof. Background technique [0002] Ultraviolet (UV) curing technology is a green and environmentally friendly technology that does not use solvents. It has fast curing speed (0.1-10s), less environmental pollution, low energy consumption, automatic production, and is suitable for use on heat-sensitive substrates. Etc. According to its use, there are mainly UV-curable coatings, adhesives, inks, etc. Among them, UV-curable coatings are widely used and produced the most varieties. UV-curable coatings can be divided into UV-curable coatings for wood, UV-curable coatings for plastics, UV-curable coatings for metals, UV-curable coatings for paper, UV-curable coatings for optical fibers, etc. according to their application fields. [0003] Most UV-curable ...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G59/17C08G18/67C08G18/32C08G18/48C09D187/00
CPCC08G81/00C08G18/3206C08G18/4825C08G18/4833C08G18/672C08G59/1466C09D187/005C08G18/48
Inventor 刘红波张武英林峰
Owner SHENZHEN POLYTECHNIC
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