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Cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating and preparation method of ultraviolet-curable coating

A technology of epoxy urethane acrylate and urethane acrylate, which is applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of brittle coating films and small molecular weight of prepolymers, and achieve good flexibility, small shrinkage, and Strong impact resistance

Inactive Publication Date: 2014-08-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the patent 201110189918 discloses a cycloaliphatic epoxy acrylate prepolymer to improve the shrinkage stress in the coating curing process, but the prepolymer is made by the direct reaction of cycloaliphatic epoxy resin and acrylic acid or methacrylic acid obtained, the prepolymer molecular weight is small, and the coating film is brittle

Method used

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  • Cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating and preparation method of ultraviolet-curable coating
  • Cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating and preparation method of ultraviolet-curable coating
  • Cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating and preparation method of ultraviolet-curable coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Synthesis of urethane acrylate

[0035] Add 222kg of isophorone diisocyanate, 5kg of p-hydroxyanisole, and 11kg of dibutyltin dilaurate into a reaction kettle equipped with a stirring device and a temperature control system, heat up to 25°C after mixing, and slowly add 130kg of acrylic acid under stirring Hydroxypropyl ester, then heated up to 30°C, reacted for 1 hour, and discharged to obtain polyurethane acrylate.

[0036] Step 2: Preparation of Modified Cycloaliphatic Epoxy Resin

[0037] Add 98kg maleic anhydride and 200kg polyethylene glycol (average molecular weight is 200) in the reaction kettle equipped with stirring device and temperature control system, and add 0.5kg polymerization inhibitor p-hydroxyanisole, and heat up to 75°C After 1.5 hours of stirring, the reaction was stopped to obtain maleic anhydride polyethylene glycol monoester, and then the temperature of the system was raised to 100 ° C, and 504 kg of alicyclic epoxy resin——3,4-cyclocyclic...

Embodiment 2

[0044] Step 1: Synthesis of urethane acrylate

[0045] Same as Example 1.

[0046] Step 2: Preparation of Modified Cycloaliphatic Epoxy Resin

[0047]Add 98kg maleic anhydride and 800kg polyethylene glycol (average molecular weight is 800) in the reactor that stirring device, temperature control system are housed, and add 1.4kg inhibitor p-hydroxyanisole, be heated up to 85 ℃ , stop the reaction after reacting under stirring for 1 hour to obtain maleic anhydride polyethylene glycol monoester, then raise the system temperature to 110°C, slowly add 166kg alicyclic epoxy resin——bis((3, 4-epoxycyclohexyl) methyl) adipate, and 0.5kg triethylamine, stop the reaction after 2 hours after the stirring reaction, cool down and discharge, and obtain a modified cycloaliphatic epoxy resin.

[0048] Step 3: Preparation of Modified Cycloaliphatic Epoxy Urethane Acrylate Prepolymer

[0049] Add 845kg of urethane acrylate monomer prepared in step 1 into a reaction kettle equipped with a stir...

Embodiment 3

[0054] Step 1: Synthesis of urethane acrylate

[0055] Same as Example 1.

[0056] Step 2: Preparation of Modified Cycloaliphatic Epoxy Resin

[0057] Add 98kg maleic anhydride and 400kg polypropylene glycol (average molecular weight is 400) in the reactor that stirrer, temperature control system are housed, and add 0.7kg inhibitor p-hydroxyanisole, be warming up to 65 ℃, in After reacting for 3 hours under stirring, the reaction was stopped to obtain polypropylene glycol monoester of maleic anhydride, then the temperature of the system was raised to 90° C., and 202 kg of cycloaliphatic epoxy resin——dicyclopentenyl ether dioxide was slowly added under the protection of nitrogen. And 0.6kg triethylamine, stirred for 8 hours to stop the reaction, cooled and discharged to prepare a modified cycloaliphatic epoxy resin.

[0058] Step 3: Preparation of Modified Cycloaliphatic Epoxy Urethane Acrylate Prepolymer

[0059] Add 422kg of urethane acrylate monomer prepared in step 1 int...

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Abstract

The invention discloses a modified cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating. The coating comprises the following chemical components in percentage by weight: 40-85% of modified cycloaliphatic epoxy polyurethane acrylate prepolymer, 10-55% of activated monomer diluent, 0.5-5% of photoinitiator, 0.1-2% of leveling agent, and 0.1-5% of adhesion promoter, wherein the sum of weight percentage of the raw materials is 100%. The invention also discloses a preparation method of the modified cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating. The coating disclosed by the invention has the characteristics of strong impact resistance, high adhesion and the like, shrinkage of the curing system is small and the flexibility of the cured film is good. The coating can be used as coating materials of various metal sheets.

Description

technical field [0001] The invention relates to an ultraviolet light curing coating and a preparation method thereof, in particular to a modified alicyclic epoxy polyurethane acrylate ultraviolet light curing coating and a preparation method thereof. Background technique [0002] UV-curable coating is a new type of green coating that is environmentally friendly, efficient and energy-saving. It is mainly composed of photosensitive resin, reactive monomer diluent, photoinitiator and various additives. Under the irradiation of ultraviolet light, the photoinitiator in the coating will generate free radicals or ionic groups, thereby initiating the unsaturated double bonds of the photosensitive resin and the reactive monomer diluent to cause a chemical reaction, and realize the curing of the coating. Compared with heat-curing coatings, UV-curing coatings hardly produce volatile organic pollution during the curing process, avoiding the serious exhaust gas pollution during the curin...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/12C08G18/75C08G18/67C08G65/48C08G81/00
Inventor 焦真王晨晨杨前前王献伟
Owner SOUTHEAST UNIV
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