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Preparation method of modified polyurethane acrylate light-cured resin

A urethane acrylate and light-curing resin technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of unsatisfactory industrial production and high price, and achieve improved mechanical properties, increased cross-linking density, and excellent flexibility. Effect

Active Publication Date: 2022-03-22
江苏三木化工股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple and easy, the price of the raw material "isocyanate ethyl acrylate" is too expensive to meet the requirements of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of modified polyurethane acrylate photocurable resin, it comprises the following steps:

[0035] (1) Oligomer A: Synthesis of Dibromoneopentyl Glycol Diacrylate A

[0036] 785.82 grams of dibromoneopentyl glycol, 475.6 grams of acrylic acid, 14.2 grams of methanesulfonic acid, 1.26 grams of copper chloride, 0.8 grams of p-hydroxyanisole, 3.15 grams of hypophosphorous acid and 315 grams of cyclohexane were stirred evenly, and passed Air, slowly raise the temperature to 83°C for reflux reaction, reflux for 10h40min during the reaction, raise the temperature to 93°C, and reduce the acid value to 21mg KOH / g. Add 800 grams of hexanaphthene in the above-mentioned mixture, keep material temperature between 70-80 ℃, wash with 170 grams of clear water, discharge waste water after layering, then use 190 grams of sodium carbonate solution (concentration 15%) and 170 grams The mixed solution of sodium hydroxide solution (concentration 5%) is washed with water,...

Embodiment 2

[0044] A preparation method of modified polyurethane acrylate photocurable resin, it comprises the following steps:

[0045] (1) Oligomer A: Synthesis of Dibromoneopentyl Glycol Diacrylate A

[0046] Stir 654.85 grams of dibromoneopentyl glycol, 3966 grams of acrylic acid, 14.5 grams of p-toluenesulfonic acid, 2.4 grams of hydroquinone, 0.6 grams of p-hydroxyanisole, 4.5 grams of hypophosphorous acid and 565 grams of toluene and stir them evenly, ventilate the air , slowly raised the temperature to 102°C for reflux reaction, during the reaction process, refluxed for 6h20min, the temperature rose to 108°C, and the acid value dropped to 20mg KOH / g. Add 450 gram toluene in above-mentioned mixture, keep material temperature between 70-80 ℃, wash with the solution after mixing 170 gram sodium carbonate solution (concentration 15%) and 150 gram sodium hydroxide solution (concentration 5%), Drain waste water after layering, wash with the solution after mixing 50 gram sodium carbonat...

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PUM

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Abstract

The invention discloses a preparation method of modified polyurethane acrylate light-cured resin, which comprises the following steps: esterifying dibromo neopentyl glycol and acrylic acid, washing with water to obtain dibromo neopentyl glycol diacrylate A, carrying out substitution reaction on the dibromo neopentyl glycol diacrylate A and sodium methacrylate, and washing with water to obtain a functional monomer B; meanwhile, polyisocyanate and hydroxyl-terminated acrylate react to prepare bifunctional polyurethane acrylate C, and finally, the functional monomer B, the polyurethane acrylate C and organic amine are mixed to prepare the modified polyurethane acrylate light-cured resin with the molecular weight of 2000-5000. The modified polyurethane acrylate light-cured resin provided by the invention is high in crosslinking density after film formation, and has the advantages of excellent flexibility and hardness, good adhesion to a base material and the like. And tertiary amine is introduced into a main chain, so that the problem of oxygen polymerization inhibition can be effectively overcome, the curing speed is greatly increased, and good technical progress is achieved.

Description

technical field [0001] The invention relates to a method for preparing a modified polyurethane acrylate photocurable resin, belonging to the technical field of polymer resins. Background technique [0002] The molecule of polyurethane acrylate (PUA) contains acrylic functional groups and urethane bonds. After curing, it has the high wear resistance, adhesion, flexibility and excellent low temperature resistance of polyurethane, as well as the excellent optical properties and weather resistance of polyacrylate. It is a kind of radiation curing material with excellent comprehensive performance. PUA has become a very important class of oligomers in the field of coatings. In view of the slow curing speed of PUA, PUA is rarely used as the main oligomer in conventional coating formulations, and it is often used as an auxiliary functional resin. In most cases , the use of PUA in the formulation is mainly to increase the flexibility of the coating, reduce stress shrinkage, and impr...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/83C09D175/14
CPCC08G18/672C08G18/831C09D175/14
Inventor 葛文成谢寒贺一铭汤佳
Owner 江苏三木化工股份有限公司
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