Polyfunctional castor oil-based photo-cured resin as well as preparation method and application thereof

A light-curing resin, castor oil-based technology, used in applications, inks, household appliances, etc., can solve the problems of UV resin dependence and low hydrophobicity, and achieve the effects of improved curing efficiency, improved comprehensive performance, and easy control.

Inactive Publication Date: 2017-06-20
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem that solves:: the purpose of the present invention aims at developing new varieties of UV resins, overcomes the shortcomings of current UV resins such as dependence on petrochemical raw materials and low hydrophobicity, and provides a kind of multifunctionality castor oil-based photocurable resin and its preparation method And application, so as to improve the photocrosslinking reaction efficiency of photocurable resin, with the advantages of stable product quality and low cost

Method used

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  • Polyfunctional castor oil-based photo-cured resin as well as preparation method and application thereof
  • Polyfunctional castor oil-based photo-cured resin as well as preparation method and application thereof
  • Polyfunctional castor oil-based photo-cured resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) In the presence of the solvent n-hexane, using isocyanate and pentaerythritol triacrylate as raw materials (the molar ratio of isocyanate and acrylate is 0.8:1), add catalyst dibutyltin dilaurate (the total mass of reactants 2%) and the polymerization inhibitor p-hydroxyanisole (1% of the total mass of the reactants), under the protection of nitrogen, react at 30°C for 4 hours until the NCO content reaches 7%, and the isocyanate semi-blocked intermediate is obtained;

[0023] (2) React the semi-blocked isocyanate intermediate obtained in step (1) with castor oil (the molar ratio of materials is 0.9:1), the temperature is 40°C, and the reaction time is 10 hours until the NCO content is lower than 0.5%, to obtain polyurethane Acrylate prepolymer, solvent removed by rotary evaporation.

[0024] (3) Mix the urethane acrylate prepolymer with the photoinitiator 2-hydroxy-2-methylpropiophenone and the diluent hydroxyethyl acrylate in a ratio of 78%: 2%: 20% by mass fractio...

Embodiment 2

[0026] (1) In the absence of solvent, using isocyanate and pentaerythritol triacrylate as raw materials (the molar ratio of isocyanate and acrylate is 0.9:1), add catalyst dibutyltin dilaurate (2% of the total mass of reactants %) and polymerization inhibitor p-methoxyphenol (1.5% of the total mass of the reactants), under nitrogen protection, react at 20°C for 5 hours until the NCO content reaches 6.5%, and the isocyanate semi-blocked intermediate is obtained;

[0027] (2) React the semi-blocked isocyanate intermediate obtained in step (1) with castor oil (the molar ratio of materials is 0.9:1), the temperature is 50°C, and the reaction time is 8 hours until the NCO content is lower than 0.5%, to obtain polyurethane Acrylate prepolymer;

[0028] (3) Mix the urethane acrylate prepolymer with the photoinitiator 2-hydroxy-2-methylpropiophenone and the diluent hydroxyethyl methacrylate at a mass fraction of 83%: 2%: 15%, and stir thoroughly After ultrasonic dispersion for 30 min...

Embodiment 3

[0030] (1) Under the condition of n-butyl ketone as solvent, isocyanate and pentaerythritol triacrylate are used as raw materials (the molar ratio of isocyanate and acrylate is 0.7:1), and the catalyst dibutyltin dilaurate (total mass of reactants 3%) and the polymerization inhibitor hydroquinone (2% of the total mass of the reactants), under the protection of nitrogen, react at 20°C for about 7 hours until the NCO content reaches 7.8%, and the isocyanate semi-blocked intermediate is obtained;

[0031] (2) React the semi-blocked isocyanate intermediate obtained in step (1) with castor oil (the molar ratio of materials is 0.9:1), the temperature is 40°C, and the reaction time is 5 hours, until the NCO content is lower than 0.5%, and polyurethane is obtained Acrylate prepolymer;

[0032] (3) Mix the urethane acrylate prepolymer with the photoinitiator 2-hydroxy-2-methylpropiophenone and the diluent triethylene glycol diacrylate at a mass fraction of 78%: 2%: 20% , fully stirred...

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Abstract

The invention relates to a polyfunctional castor oil-based photo-cured resin as well as a preparation method and application thereof. The preparation method comprises the following steps: with isocyanate and hydroxyl acrylate as raw materials, adding a polymerization inhibitor and a catalyst, introducing nitrogen for protection, and reacting for a certain period of time, so as to obtain an intermediate isocyanate semi-blocked prepolymer; adding castor oil into the prepared isocyanate semi-blocked prepolymer, so as to obtain castor oil-based urethane acrylate resin; and mixing the castor oil-based urethane acrylate resin with a photoinitiator and a diluent, and carrying out ultraviolet light radiation, so as to obtain UV castor oil-based resin with excellent performance. The photo-cured resin synthesized by virtue of the preparation method has relatively high molecular weight and viscosity, so that the interaction among resin molecules is enhanced, and the photo-crosslinking reaction efficiency of the resin is improved; the photo-cured resin contains more terminal double bonds, can be rapidly photo-cured and is suitable for being used as UV cured coatings, 3D printing materials and the like; and the prepared photo-cured resin has the beneficial effects that the water absorption rate and volume shrinkage rate of a cured film are substantially increased, meanwhile, the cost is low, the process is simple and controllable, and a product is relatively environment-friendly.

Description

technical field [0001] The invention belongs to the field of photocurable materials, and relates to a method for preparing a hydrophobic photocurable resin, in particular to a multifunctional vegetable oil-based photocurable resin and its preparation method and application. Background technique [0002] Ultraviolet (uv) curing technology is a new energy-saving and environmentally friendly technology. Due to its fast curing speed, environmental friendliness, low energy consumption, and no solvent volatilization, the application of light-curing products is becoming more and more extensive. At present, most photocurable resins rely on chemical reagents related to petroleum resources. At present, due to limited petrochemical resources and environmental protection issues, vegetable oil is cheap, abundant and biodegradable as a renewable resource. Therefore, researchers are turning more attention to the direction of vegetable oil-based photocurable materials. [0003] Natural o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C09D175/14C09D11/102C08L75/14B33Y70/00
CPCC08G18/36B33Y70/00C08G18/672C08L75/14C08L2201/06C08L2201/08C09D11/102C09D175/14
Inventor 周永红胡云刘承果胡立红尚倩倩贾普友
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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