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Synthesis method of radiation-curing polyurethane acrylate paint

A polyurethane acrylate and radiation curing technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of low initiation efficiency, slow curing speed, accelerated coating aging, etc., and achieve strong chemical resistance , low cost and simple method

Inactive Publication Date: 2015-02-11
CHONGQING JINYU PIPELINE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the photoinitiator in the early stage of UV radiation curing coating has low initiation efficiency and slow curing speed, which is not conducive to deep curing, and a small amount of initiator residue remains after curing, and these residues will accelerate the aging of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A method for synthesizing a radiation-cured polyurethane acrylate paint, comprising the steps of:

[0022] Add 2,4-toluene diisocyanate into a 250mL four-necked flask;

[0023] Add the catalyst dibutyltin dilaurate, and drop the polyoxypropylene diol through dehydration treatment in the reactor;

[0024] After the feeding is completed, the temperature is raised, and the heat preservation reaction is carried out until the -NCO content reaches the theoretical value;

[0025] Add pentaerythritol triacrylate, keep warm for reaction and carry out capping, and at the same time detect the -NCO content in the system until it reaches the theoretical value;

[0026] Cool down to room temperature, add a specified amount of trimethylolpropane trimethacrylate, and adjust the reactive functionality and viscosity of the urethane acrylate radiation-curable coating to obtain a radiation-curable urethane acrylate coating.

Embodiment 1

[0028] Add 2,4-toluene diisocyanate into a clean and dry 250mL four-neck flask with nitrogen inlet, stirrer, thermometer and reflux condenser; under the protection of nitrogen atmosphere, the temperature is raised to 50°C, and the amount added is 0.03% of the total mass of the element The catalyst dibutyltin dilaurate, and the dehydrated polyoxypropylene diol was added dropwise to the reactor within 1 hour; after the feeding was completed, the temperature was raised to 60°C, and the heat preservation reaction was carried out for 2 hours until the -NCO content reached 11.2%; pentaerythritol triacrylic acid was added Ester, heat preservation reaction for 1h and capping, while detecting the -NCO content in the system until it reaches 11.2%; cool down to room temperature, and add a specified amount of trimethylolpropane trimethacrylate, and adjust the radiation curing of polyurethane acrylate The reactive functionality and viscosity of the paint were used to obtain a radiation-cure...

Embodiment 2

[0030] Add 2,4-toluene diisocyanate into a clean and dry 250mL four-neck flask with nitrogen inlet, stirrer, thermometer and reflux condenser; under the protection of nitrogen atmosphere, the temperature is raised to 60°C, and the amount added is 0.05% of the total mass of the element The catalyst dibutyltin dilaurate, and the dehydrated polyoxypropylene glycol was added dropwise to the reactor within 1.2 hours; after the feeding was completed, the temperature was raised to 65°C, and the heat preservation reaction was carried out for 3 hours until the -NCO content reached 13.3%; pentaerythritol tri Acrylate, heat preservation reaction for 2 hours and end-capping, while detecting the -NCO content in the system until it reaches 13.3%; cool down to room temperature, and add a specified amount of trimethylolpropane trimethacrylate, and adjust the radiation of polyurethane acrylate The reaction functionality and viscosity of the cured coating are obtained to obtain a radiation-cured...

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Abstract

The invention relates to a synthesis method of a radiation-curing polyurethane acrylate paint, which comprises the following steps: adding 2,4-toluene diisocyanate into a 250mL four-neck flask; adding a catalyst dibutyltin dilaurate, and dropwisely adding dehydrated polyoxypropylene diol into a reactor; after finishing charging, heating, and keeping the temperature to react until the -NCO content reaches the theoretical value; adding pentaerythritol triacrylate, keeping the temperature to react for termination, and meanwhile, detecting the -NCO content in the system until the -NCO content reaches the theoretical value; and cooling to room temperature, adding a given amount of trimethylolpropane trimethylacrylate, and regulating the reaction functionality and viscosity of the polyurethane acrylate radiation-curing paint to obtain the radiation-curing polyurethane acrylate paint. The method is simple, is low in cost, and does not need to add any initiator; and the synthetic radiation-curing polyurethane acrylate paint has the advantages of no pollution, high corrosion resistance and high chemical resistance.

Description

technical field [0001] The invention relates to a synthesis technology of radiation-cured paint, in particular to a synthesis method of radiation-cured polyurethane acrylate paint. Background technique [0002] With the increasing calls for global environmental protection, the development of environmentally friendly coatings with little environmental pollution has become the main direction of the development of the coatings industry at home and abroad at this stage. Radiation-curing coatings have the characteristics of high efficiency, energy saving, and pollution-free. The main curing methods are: ultraviolet radiation curing (UV curing), infrared (IR) curing, electron beam radiation (EB) curing, and gamma ray radiation curing. . Among them, the photoinitiator in the early stage of UV radiation curing coating has low initiation efficiency and slow curing speed, which is not conducive to deep curing, and a small amount of initiator residue remains after curing, and these re...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/12C08G18/76C08G18/67C08G18/48
CPCC09D175/14C08G18/4825C08G18/673C08G18/7614C09D5/08
Inventor 肖代伟
Owner CHONGQING JINYU PIPELINE EQUIP
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