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

Self-repairing waterborne polyurethane-polyacrylic acid emulsion and preparation method thereof

A technology of polyacrylic acid emulsion and water-based polyurethane, which is applied in the direction of coating, etc., can solve the problems of shortening the service life of materials, becoming sticky at high temperature, poor tensile performance, etc., and achieves the effect of strong self-healing ability

Pending Publication Date: 2021-02-26
安徽程涵科技有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Water-based polyurethane (WPU) refers to the formation of polyurethane resin dissolved or dispersed in water. It has the advantages of low toxicity, non-combustibility, and no pollution to the environment. During use, mechanical damage caused by friction, collision, and bending will damage the appearance of the material. , Affect the material performance, and ultimately shorten the service life of the material
[0003] Polyacrylate materials have the properties of weather resistance, water resistance, pollution resistance, acid resistance, alkali resistance, good transparency, etc., and the production cost is low, but there are also problems such as easy to become brittle at low temperature, sticky at high temperature, poor solvent resistance, and stretch resistance. Disadvantages such as poor performance
[0004] Waterborne polyurethane-polyacrylic resin has many advantages of polyurethane and polyacrylate materials, but it is still prone to micro-damages such as micro-cracks and macro-damages, which affect the material properties

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
  • Self-repairing waterborne polyurethane-polyacrylic acid emulsion and preparation method thereof
  • Self-repairing waterborne polyurethane-polyacrylic acid emulsion and preparation method thereof
  • Self-repairing waterborne polyurethane-polyacrylic acid emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Such as figure 1 as shown, figure 1 It is a flowchart of the preparation method of the self-healing waterborne polyurethane-polyacrylic acid emulsion. The preparation method of self-repairing water-based polyurethane-polyacrylic acid emulsion of the present invention, raw material is measured in parts by mass, comprises the steps:

[0029] S1, heating 60-120 parts of polymer polyol to 100°C-130°C, vacuum dehydration for 1h-2h;

[0030] S2, carry out nitrogen protection on the solution obtained in step S1, and lower the temperature to 60°C-90°C, add 30-60 parts of polyisocyanate and 0.01-0.03 parts of catalyst, react for 1h-3h, add 30-60 parts of organic solvent to adjust the viscosity ;

[0031] S3, adding 5 to 10 parts of a hydrophilic chain extender to the solution obtained in step S2, and reacting at 50°C to 90°C for 1h to 3h;

[0032] S4, adding 5 to 15 parts of disulfide bond compounds and 5 to 10 parts of acylhydrazone bond compounds to the solution obtained i...

Embodiment 1

[0051] The preparation method of the self-repairing water-based polyurethane-polyacrylic acid emulsion, raw materials in parts by mass, comprises the steps:

[0052] S1, add 100 parts of polytetrahydrofuran diol into the reactor, and perform vacuum dehydration at 120°C for 2 hours;

[0053] S2, at N 2 Under protection, lower the temperature to 80°C, add 44.5 parts of isophorone diisocyanate and 0.03 parts of dibutyltin dilaurate, react at 90°C for 3 hours, and adjust the viscosity with 40 parts of N-methylpyrrolidone;

[0054] S3, lower the temperature to 70°C, add 8 parts of sodium N-(2-aminoethyl)-2-aminoethanesulfonate and react for 3h

[0055] S4, cooling down to 50°C, adding 10 parts of 4,4′-diaminodiphenylsulfide and 5 parts of quinone oxime hydrazone to react for 2 hours;

[0056] S5, add 10 parts of hydroxyethyl methacrylate (HEMA), and react at 90° C. for 3 hours;

[0057] S6, add 10 parts of acrylic acid, 20 parts of acrylate, 30 parts of methyl methacrylate, 0.01...

Embodiment 2

[0063] The preparation method of the self-repairing water-based polyurethane-polyacrylic acid emulsion, raw materials in parts by mass, comprises the steps:

[0064] S1, add 100 parts of polycaprolactone diol into the reactor, and perform vacuum dehydration at 120°C for 2 hours;

[0065] S2, at N 2 Under protection, lower the temperature to 70°C, add 50 parts of 4,4-diphenylmethane diisocyanate (MDI) and 0.02 parts of stannous octoate, react at 85°C for 3 hours, and adjust the viscosity with 40 parts of 20ml dioxane;

[0066] S3, lower the temperature to 70°C, add 10 parts of sodium ethylenediaminoethanesulfonate and react for 3 hours;

[0067] S4, heating up to 50°C, adding 12 parts of 4,4′-dihydroxydiphenylsulfide and 6 parts of difenpyrofen, and reacting for 3 hours;

[0068] S5, add 10 parts of hydroxyethyl acrylate (HEA), and react at 90° C. for 2 hours;

[0069] S6, add 10 parts of acrylic acid (AA), 20 parts of methyl methacrylate, 20 parts of styrene, 0.010 parts of...

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
The average particle sizeaaaaaaaaaa
Viscosityaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a self-repairing waterborne polyurethane-polyacrylic acid emulsion and a preparation method thereof. The preparation method comprises the steps of firstly, synthesizing a polyurethane prepolymer containing a disulfide bond and an acylhydrazone bond, and carrying out end capping by utilizing hydroxy acrylic acid to prepare a polyurethane prepolymer with double bonds; and then carrying out free radical copolymerization with acrylic acid, and finally salifying and emulsifying to obtain the waterborne polyurethane-polyacrylic acid emulsion containing the disulfide bond. According to the invention, damage repair is achieved through reversible reaction chemical bonds of the disulfide bond and the acylhydrazone bond and the hydrogen-bond interaction of polyurethane-polyacrylic acid, and the method has the advantages of being high in self-repair force, capable of self-healing cracks and damaged coatings and capable of being carried out infinitely.

Description

technical field [0001] The invention relates to the technical field of self-repairing polymers, in particular to a self-repairing water-based polyurethane-polyacrylic acid emulsion and a preparation method thereof. Background technique [0002] Water-based polyurethane (WPU) refers to the formation of polyurethane resin dissolved or dispersed in water. It has the advantages of low toxicity, non-combustibility, and no pollution to the environment. During use, mechanical damage caused by friction, collision, and bending will damage the appearance of the material. , Affect the material performance, and ultimately shorten the service life of the material. [0003] Polyacrylate materials have the properties of weather resistance, water resistance, pollution resistance, acid resistance, alkali resistance, good transparency, etc., and the production cost is low, but there are also problems such as easy to become brittle at low temperature, sticky at high temperature, poor solvent r...

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
IPC IPC(8): C08F283/00C08F220/06C08F220/10C08F220/14C08F212/08C09D151/08
CPCC08F283/008C09D151/08C08F220/06C08F220/10C08F220/14C08F212/08
Inventor 胡先海章旭徐艳李锡良
Owner 安徽程涵科技有限公司
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