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

High-hardness ethanol-resistant waterborne polyurethane emulsion and preparation method thereof

A water-based polyurethane, ethanol-resistant technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of ethanol resistance and poor hardness, and achieve the effect of excellent hardness and ethanol resistance

Inactive Publication Date: 2019-04-30
GUANGDONG UNIV OF TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a high-hardness, ethanol-resistant water-based polyurethane emulsion and a preparation method thereof, which are used to solve the problems of existing water-based polyurethanes with poor ethanol resistance and hardness

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
  • High-hardness ethanol-resistant waterborne polyurethane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054]In parts by mass, take 60 parts of polypropylene carbonate diol with a molecular weight of 3000 and a hydroxyl functionality of 2, 53 parts of isophorone diisocyanate, 5 parts of dimethylolpropionic acid in 0.12 parts of stannous octoate Under the action of , the first reaction was carried out at 85 °C for 4 h, the temperature was lowered to 60 °C, 1.3 parts of trimethylolpropane, 3.1 parts of neopentyl glycol, 4.3 parts of 1,4-cyclohexanedimethanol and 10 parts of Acetone, heat up to 75°C for 1h second reaction, lower the temperature to 50°C, add 20 parts of acetone to reduce viscosity, add 3.9 parts of KH-550, carry out the third reaction for 30min, lower the temperature to 40°C, add 3.8 parts of triethylamine Carry out neutralization reaction for 5min, then add 250 parts of deionized water at 1500r / min for 15min emulsification reaction, then add 2.56 parts of ethylenediamine at 800r / min to carry out chain extension reaction for 30min, heat up to 50 ℃ and remove acetone...

Embodiment 2

[0056] In parts by mass, take 60 parts of polypropylene carbonate diol with a molecular weight of 3000 and a hydroxyl functionality of 2, 53 parts of isophorone diisocyanate, 5 parts of dimethylolpropionic acid in 0.12 parts of stannous octoate Under the action of , the first reaction was carried out at 85 °C for 4 h, the temperature was lowered to 60 °C, 1.3 parts of trimethylolpropane, 3.1 parts of neopentyl glycol, 4.3 parts of 1,4-cyclohexanedimethanol and 10 parts of Acetone, heat up to 75°C for 1h second reaction, lower the temperature to 50°C, add 20 parts of acetone to reduce viscosity, add 3.9 parts of KH-550, carry out the third reaction for 30min, lower the temperature to 40°C, add 3.8 parts of triethylamine Carry out neutralization reaction for 5min, then add 250 parts of deionized water at 1500r / min for 15min emulsification reaction, then add 2.56 parts of ethylenediamine at 800r / min to carry out chain extension reaction for 30min, heat up to 50 ℃ and remove aceton...

Embodiment 3

[0058] In parts by mass, take 60 parts of polypropylene carbonate diol with a molecular weight of 3000 and a hydroxyl functionality of 2, 53 parts of isophorone diisocyanate, 5 parts of dimethylolpropionic acid in 0.12 parts of stannous octoate Under the action of , the first reaction was carried out at 85 °C for 4 h, the temperature was lowered to 60 °C, 1.3 parts of trimethylolpropane, 3.1 parts of neopentyl glycol, 4.3 parts of 1,4-cyclohexanedimethanol and 10 parts of Acetone, heat up to 75°C for 1h second reaction, lower the temperature to 50°C, add 20 parts of acetone to reduce viscosity, add 3.9 parts of KH-550, carry out the third reaction for 30min, lower the temperature to 40°C, add 3.8 parts of triethylamine Carry out neutralization reaction for 5min, then add 250 parts of deionized water at 1500r / min for 15min emulsification reaction, then add 2.56 parts of ethylenediamine at 800r / min to carry out chain extension reaction for 30min, heat up to 50 ℃ and remove aceton...

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
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of fine chemicals, and especially relates to a high-hardness ethanol-resistant waterborne polyurethane emulsion and a preparation method thereof. The preparation method of the high-hardness ethanol-resistant waterborne polyurethane emulsion comprises the following steps: a) performing a first reaction on poly(propylene carbonate)polyol, diisocyanate anda hydrophilic chain extender under the action of a catalyst to obtain a first product; b) adding a crosslinking agent and a non-hydrophilic chain extender to the first product, and performing a second reaction to obtain a second product; c) adding a silane coupling agent to the second product, and performing a third reaction to obtain a third product; d) adding a neutralizing agent to the third product, carrying out a neutralization reaction, adding deionized water, and carrying out an emulsification reaction to obtain a fourth product; and e) adding nano-silica to the fourth product to obtain the waterborne polyurethane emulsion. Results show that a film formed by the waterborne polyurethane emulsion has excellent hardness and excellent ethanol resistance.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and particularly relates to a high-hardness, ethanol-resistant aqueous polyurethane emulsion and a preparation method thereof. Background technique [0002] Waterborne polyurethane is a new environmentally friendly material, which is widely used in coatings, adhesives, fabric coating agents, etc. However, the water resistance and ethanol resistance of pure water-based polyurethane are usually poor due to the existence of hydrophilic groups, and the presence of hydrophilic groups will reduce the mechanical properties of water-based polyurethane and lower the hardness. Wood furniture paints and water-based industrial paints often come into contact with ethanol, which makes water-based polyurethanes require ethanol resistance, and the current performance of water-based polyurethanes limits their application fields. SUMMARY OF THE INVENTION [0003] In view of this, the purpose of the prese...

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 Applications(China)
IPC IPC(8): C08G18/44C08G18/12C08G18/32C08G18/34C08G18/75C08G18/28C08G18/66C09D175/04C09D7/62
CPCC08G18/0823C08G18/12C08G18/289C08G18/3206C08G18/3212C08G18/3228C08G18/348C08G18/44C08G18/6651C08G18/755C08K2201/011C09D7/62C09D7/67C09D175/04C08G18/32C08K9/00C08K3/36
Inventor 李昭陈熙符宗可朱炜健程梦平萧雅刘保华
Owner GUANGDONG 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