Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of 80-95% solid content aqueous photocurable polyurethane acrylate and its preparation method

A technology of urethane acrylate and hydroxypropyl acrylate, which is applied in the field of 80-95% solid content water-based photocurable urethane acrylate and its preparation, can solve the problem that the solid content is only 50-60%, the strength is only 6.0MPa, and the solid content is only 50%. % and other issues, to achieve the effect of increasing equipment utilization, appropriate particle size distribution width, and shortening drying time

Inactive Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102030884A introduces a monoesterification reaction between some of the hydroxyl groups at the end of the hyperbranched polyester and the anhydride group of the dianhydride, so that the NCO group reacts with the hydroxyl group in the hydroxyalkyl (meth)acrylate monomer, and finally the remaining The -OH group reacts with the -NCO group, but the solid content of the publicly synthesized urethane acrylate dispersion is only 50-60%
Chinese patent 201010522650.4 reduces viscosity by introducing hyperbranched polymer into UV-curable aqueous polyurethane dispersion, but the solid content is only about 50%
Japanese patent JP 2010163612A adopts (meth)acrylate monomer, butyl acrylate and methacrylic acid mixed with emulsifier compound method, and deionized water is added to prepare polyurethane-(meth)acrylate with a solid content of only 55%. Composite resin dispersion, the swelling rate is 5.1%, the elongation rate can reach 350%, but the strength is only 6.0MPa

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of 80-95% solid content aqueous photocurable polyurethane acrylate and its preparation method
  • A kind of 80-95% solid content aqueous photocurable polyurethane acrylate and its preparation method
  • A kind of 80-95% solid content aqueous photocurable polyurethane acrylate and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Synthesis of polyurethane prepolymer I: Add 32.5g isophorone diisocyanate (IPDI) and 24.4g polyoxypropylene glycol (Mw=1000) in a dry four-necked flask equipped with a stirrer and a thermometer, Add 0.06g of catalyst dibutyltin dilaurate dropwise, the reaction is carried out in a constant temperature water bath, the temperature is raised to 85°C, and the reaction is kept at this temperature for about 1.5h, and the content of -NCO is measured by the di-n-butylamine method. When the value is close to or lower than the theoretical value, the semi-blocked polyurethane prepolymer I is obtained;

[0045] (2) Synthesis of polyurethane prepolymer II: cool down to 70°C, weigh 9.8g of dimethylolpropionic acid (DMPA), dissolve it with 18.6g of acetone, place it in a dropping funnel, drop it into a four-necked flask, The dropping rate is 3s / drop, keep this temperature for 3h, during which a proper amount of acetone is added to adjust the viscosity, and the content of -NCO is me...

Embodiment 2

[0050] (1) Synthesis of polyurethane prepolymer I: add 38.1g of isophorone diisocyanate (IPDI) and 11.4g of polyethylene glycol (Mw=400) into a dry four-necked flask equipped with a stirrer and a thermometer, drop Add 0.05g catalyst dibutyltin dilaurate, react in a constant temperature water bath, raise the temperature to 85°C, keep this temperature for about 1.5h, measure the content of -NCO by the di-n-butylamine method, when the content of -NCO is the same as the theoretical value When it is close to or lower than the theoretical value, the semi-blocked polyurethane prepolymer I is obtained;

[0051] (2) Synthesis of polyurethane prepolymer II: cool down to 70°C, weigh 11.5g of dimethylolpropionic acid (DMPA), dissolve it with 23.0g of acetone, place it in a dropping funnel, drop it into a four-necked flask, The dropping rate is 3s / drop, keep this temperature for 3h, during which a proper amount of acetone is added to adjust the viscosity, and the content of -NCO is measure...

Embodiment 3

[0056] (1) Synthesis of polyurethane prepolymer I: add 34.6g isophorone diisocyanate (IPDI), 13.0g polyoxypropylene diol (Mw=1000) and 5.2g polyethylene glycol (Mw=400), add 0.05g catalyst dibutyltin dilaurate dropwise, the reaction is carried out in a constant temperature water bath, the temperature is raised to 85°C, and the temperature is maintained for about 1.5h, and the dibutylamine method is used. Measure the content of -NCO, when the content of -NCO is close to or lower than the theoretical value, the semi-blocked polyurethane prepolymer I is obtained;

[0057] (2) Synthesis of polyurethane prepolymer II: cool down to 70°C, weigh 9.6g of dimethylolpropionic acid (DMPA), dissolve it with 19.2g of acetone, put it in a dropping funnel, drop it into a four-necked flask, The dropping rate is 3s / drop, keep this temperature for 3h, during which a proper amount of acetone is added to adjust the viscosity, and the content of -NCO is measured by the di-n-butylamine method. When ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
strengthaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of coating technologies, and discloses 80-95% solid content waterborne UV-curable urethane acrylate and a preparation method. The preparation method is: letting fat diisocyanate and a polyether compound react under catalytic agent, to obtain urethano prepolymer I; dissolving dry dimethylolpropionic acid in acetone, and adding a solution thereof drop by drop to the urethano prepolymer I for reaction, to obtain urethano prepolymer II; adding a mixture of (methyl) hydroxy-propyl acrylate and pentaerythritol triacrylate with catalyst and polymerization inhibitor drop by drop to the urethano prepolymer II for reaction, to obtain the urethane acrylate; adding deionized water after neutralization, and then removing acetone solvent, to obtain the 80-95% solid content waterborne UV-curable urethane acrylate. The product of the invention has advantages in high in solid content, low in formula weight, proper in particle diameter distribution width, low in viscosity, and good dilutability, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based photocurable polyurethane acrylate with a solid content of 80-95% and a preparation method thereof. Background technique [0002] In the application of traditional solvent-based UV-curable polyurethane acrylate, it is necessary to add acrylate reactive diluents to adjust the viscosity of oligomer resins, and these reactive diluents usually have certain skin irritation and volatility. After curing, unreacted small molecules volatilize into the air, which will cause serious harm to construction personnel, users and the environment. With the improvement of people's awareness of environmental protection and the restrictions on the content of volatile organic compounds (VOC) in various countries, it has become a consensus to develop low-pollution and environmentally friendly water-based UV-curable polyurethane acrylate products. [0003] The water-based ult...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/67C08G18/66C08G18/48C08G18/32C08G18/12C09D175/14
CPCC08G18/12C08G18/4808C08G18/672C08G18/755C09D175/14C08G18/6692C08G18/0823
Inventor 叶代勇邓锡柱
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com