UV-curable elastic polyurethane acrylate emulsion and synthesis method thereof

A polyurethane acrylic and ultraviolet light technology, applied in polyurea/polyurethane coatings, applications, coatings, etc., can solve the problems of reaction failure, system gelation, and high viscosity of the reaction system, and achieve easy control, fast curing speed, and polymerization reaction. smooth effect

Inactive Publication Date: 2015-04-29
HUNAN SUIFENG NEW MATERIAL & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the reaction process, the heat release is large, the molecular weight is getting bigger and bigger, and the viscosity of the reaction system is getting higher and higher. If the formula or synthesis method is slightly improper, it will easily lead to the gelation of the system and the failure of the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 1510g polytetrahydrofuran diol (number-average molecular weight: 2000), 150g dimethylol propionic acid, 102.3g 1,4-cyclohexanediol and 574.4g toluene diisocyanate, react at 80°C for 2.5h to form polyurethane prepolymer body. Add 120g hydroxyethyl acrylate, 0.32g dibutyltin dilaurate and 0.65g p-methoxyphenol at 85°C, mix uniformly and react for 2 hours to form polyurethane acrylate. After cooling down to 60°C, add 500mL of acetone to dilute, then add 101g of triethylamine to neutralize and form a salt, and finally add 4173g of deionized water to form a water-based polyurethane emulsion after hydration for 0.5h, and perform vacuum desolventization under reduced pressure. Finally, 331 g of photoinitiator was added, and after mixing evenly, a UV-curable aqueous polyurethane acrylate elastic emulsion was prepared, and its solid content and viscosity were tested. The prepared emulsion was coated on a polytetrafluoroethylene board, dried or dried, then cured by ultraviol...

Embodiment 2

[0026] Mix 1510g polytetrahydrofuran diol (number average molecular weight 2000), 150g dimethylol propionic acid, 53.9g 1,4-cyclohexanediol and 622.8g isophorone diisocyanate, react at 80°C for 2.5h to form Polyurethane prepolymers. Add 120g hydroxyethyl acrylate, 0.32g triphenylbismuth and 0.65g p-methoxyphenol at 85°C, mix well and react for 2 hours to form polyurethane acrylate. After cooling down to 60°C, add 500mL of acetone to dilute, then add 101g of triethylamine to neutralize and form a salt, and finally add 4173g of deionized water to form a water-based polyurethane emulsion after hydration for 0.5h, and perform vacuum desolventization under reduced pressure. Finally, 331 g of photoinitiator was added, and after mixing evenly, a UV-curable aqueous polyurethane acrylate elastic emulsion was prepared, and its solid content and viscosity were tested. The prepared emulsion was coated on a polytetrafluoroethylene board, dried or dried, then cured by ultraviolet light, an...

Embodiment 3

[0028] Mix 1510g polytetrahydrofuran diol (number-average molecular weight: 2000), 150g dimethylol propionic acid, 45g 1,4-butanediol and 631.8g isophorone diisocyanate, and react at 80°C for 2.5h to form polyurethane pre- Polymer. Add 120g of hydroxyethyl acrylate, 0.32g of dibutyltin dilaurate and 0.65g of hydroquinone at 85°C, mix uniformly and react for 2 hours to form polyurethane acrylate. After cooling down to 60°C, add 500mL of acetone to dilute, then add 101g of triethylamine to neutralize and form a salt, and finally add 4173g of deionized water to form a water-based polyurethane emulsion after hydration for 0.5h, and perform vacuum desolventization under reduced pressure. Finally, 331 g of photoinitiator was added, and after mixing evenly, a UV-curable aqueous polyurethane acrylate elastic emulsion was prepared, and its solid content and viscosity were tested. The prepared emulsion was coated on a polytetrafluoroethylene board, dried or dried, then cured by ultravi...

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Abstract

The invention discloses UV-curable elastic polyurethane acrylate emulsion and a synthesis method thereof. The synthesis method of the UV-curable elastic polyurethane acrylate emulsion comprises the following steps: carrying out reaction on polyester glycol or polyether glycol, carboxylic acid-containing glycol and diisocyanate to generate a prepolymer, adding an optimized micromolecular chain extender for carrying out chain extension, then adding hydroxy-containing acrylate for carrying out blocking reaction, diluting by virtue of an organic solvent, neutralizing and salifying by adopting organic amine, finally adding deionized water for carrying out hydration, and adding a photoinitiator to obtain the UV-curable elastic polyurethane acrylate emulsion. The UV-curable elastic polyurethane acrylate emulsion is polyurethane blocked by acrylate, and a molecular chain of the UV-curable elastic polyurethane acrylate emulsion is provided with hydrophilic negative ions and double bonds, so that the UV-curable elastic polyurethane acrylate emulsion has self-emulsifying property and photocuring activity; and a cured film formed by carrying out photocuring on the synthesized elastic polyurethane acrylate emulsion has excellent mechanical properties, tensile strength is 21MPa, and elongation is 350%, so that the elastic polyurethane acrylate emulsion can serve as matrix resin of water-based ink and waterborne UV-curable elastic paint.

Description

technical field [0001] The invention relates to an elastic polyurethane emulsion, in particular to an ultraviolet-curable elastic polyurethane acrylate emulsion and a synthesis method thereof. The emulsion can be used as the main resin of water-based photocurable elastic coating and water-based ink. technical background [0002] Water-based polyurethane uses water as the dispersion medium. Because of its advantages of no pollution, safety and environmental protection, excellent mechanical properties, good compatibility, and easy modification, it has gradually replaced solvent-based polyurethane and has become an important direction for the development of the polyurethane industry. Waterborne polyurethane can be widely used in coatings, adhesives, fabric coating and finishing agents, leather finishing agents, paper surface treatment agents and fiber surface treatment agents. [0003] Polyurethane acrylate molecules contain acrylic functional groups and urethane bonds, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/12C09D175/14C09D11/101
CPCC09D153/02
Inventor 邓剑如张习龙岳德英
Owner HUNAN SUIFENG NEW MATERIAL & TECH DEV
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