Synthesis process of novel water-based polyurethane light-cured resin

A water-based polyurethane and light-curing resin technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of increasing production cost, reducing production efficiency, adding a large amount, etc., and achieving enhanced hardness, toxicity, and flexibility. Effect

Active Publication Date: 2017-05-31
安徽圣达生物药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based light-curing coatings have a low viscosity in water-dispersed systems. Unlike traditional light-curing systems, a large amount of reactive diluents are added to reduce the viscosity of the system to meet construction requirements. However, in order to obtain a coating film with sufficient mechanical strength, synthetic The molecular weight of the resin must be large enough, which will inevitably cause a large amount of solvent to be added during the synthesis stage of the prepolymer b

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method that contains multifunctional group high hardness water emulsifiable photocurable prepolymer PU1, comprises the following steps: in the reaction bottle that agitator, thermometer, reflux condenser are housed, add 222g (1mol) isophorone Diisocyanate (polyisocyanate), 37g (0.276mol) trimethylolpropionic acid, mix and stir evenly at room temperature, react at 70°C for 2 hours, then add 18.5g (0.138mol) dimethylolbutyric acid, 28g (0.0224 mol) Tegomer D 3403, continue to react at 70°C for 2 hours, finally add 98g (0.75mol) hydroxyethyl methacrylate, react at 70°C, until the detected isocyanate content is 0.8-1.0% of the theoretical residual amount, stop heating, The prepolymer PU1 was obtained.

Embodiment 2

[0027] A kind of preparation method that contains polyfunctional group high hardness water emulsifiable photocurable prepolymer PU1, comprises the following steps: in the reaction bottle that stirrer, thermometer, reflux condenser are housed, add 222g (1mol) toluene diisocyanate ( Polyisocyanate), 37g (0.276mol) trimethylolpropionic acid, mix and stir evenly at room temperature, react at 90°C for 2 hours, then add 25g (0.186mol) dimethylolbutyric acid, 10g (0.008mol) Tegomer D 3403, continue to react at 90°C for 2 hours, finally add 90g (0.692mol) hydroxyethyl methacrylate, react at 80°C, until the detected isocyanate content is 0.8-1.0% of the theoretical residual amount, stop heating to obtain a prepolymer PU1.

Embodiment 3

[0029]A kind of preparation method of the aqueous polyurethane photocuring prepolymer PU2 that contains carbamate, comprises the following steps: in the reaction flask that stirrer, thermometer, reflux condenser are housed, add 222g (1mol) isophorone two Isocyanate (polyisocyanate), 800g (0.25mol) polyoxypropylene diol (polyoxypropylene polyol) with a molecular weight of 3000 were reacted at 90°C for 2 hours, then 58g (0.432mol) dimethylol propionic acid (philic acid) was added Water chain extender), 40g (0.4mol) N-methylpyrrolidone, mixed and stirred at room temperature, reacted at 75°C for 2 hours, added 45g (0.346mol) hydroxyethyl methacrylate, 8g (0.035mol) Darocur2959, Continue the reaction at 70°C until the detected isocyanate content is 0.8-1.0% of the theoretical residual amount, then stop heating to obtain prepolymer PU2.

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PUM

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Abstract

The invention discloses a synthesis process of novel water-based polyurethane (PU) light-cured resin. The synthesis process comprises the following steps: 1) synthesizing a high-rigidity and water emulsifiable light-cured pre-polymer PU1 containing a multifunctional group; 2) synthesizing a water-based polyurethane light-cured pre-polymer PU2 containing carbamate; mixing the two pre-polymers PU1 and PU2 at different ratios to form a pre-polymer which takes the PU1 as a core and the PU2 as a shell, so as to realize molecule-graded fusion; adding triethylamine to neutralize ion groups; adding water and emulsifying to form water-based polyurethane light-cured resin with different rigidity. By adopting the synthesis process disclosed by the invention, the disadvantages of toxin, volatility and the like of a traditional light-cured paint active diluting agent are overcome; the problem that a lot of solvents need to be added into a synthesis phase of common water-based light-cured resin is solved. By adjusting the ratio of the PU1 to the PU2, the resin with relatively high rigidity is prepared and applied to floor paint, the resin with moderate rigidity is applied to furniture paint and the soft resin is applied to synthetic leather; the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a water-based polyurethane light-curing resin, in particular to a synthesis process of a novel water-based polyurethane light-curing resin, and belongs to the application field of water-based polyurethane coatings. Background technique [0002] In the early 1960s, German Bayer Company took the lead in developing light-curing coatings, which were applied in the wood coating industry. Because its technology conforms to the concepts of environmental protection, energy saving, and clean production, it has attracted increasing attention. After more than 40 years, light-curing coatings have developed rapidly and have been widely used in many industries. [0003] Traditional UV-curable coatings are composed of three parts: photoinitiator, reactive oligomer, and reactive diluent. The reactive diluent has a diluting effect, adjusts the viscosity and rheology of the main component reactive oligomer, and participates in light The curing ...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/32C08G18/34C08G18/66C08G18/48C08G18/42C08G18/10C08L75/14C09D175/14
Inventor 刘斌蒋燕
Owner 安徽圣达生物药业有限公司
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