Unlock instant, AI-driven research and patent intelligence for your innovation.

Waterborne polyurethane emulsion, and preparation method and application thereof

A technology of water-based polyurethane and polyurethane resin, applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, applications, etc., can solve problems such as poor yellowing resistance, achieve good stability, improve stability, and improve The effect of initial tack

Active Publication Date: 2019-10-15
JIAXING UNIV
View PDF19 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent document US5608000 adopts polyester diol of polyhexamethylene adipate and 5-sodium isophthalate as soft segment to prepare sulfonate water-based polyurethane, and the obtained water-based polyurethane adhesive has fast crystallization speed and good initial tack High; however, the water-based polyurethane molecular chain contains a benzene ring structure, although the crystallization performance and initial tack of the adhesive are improved, but the yellowing resistance is poor

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
  • Waterborne polyurethane emulsion, and preparation method and application thereof
  • Waterborne polyurethane emulsion, and preparation method and application thereof
  • Waterborne polyurethane emulsion, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0088] As an embodiment, the polyurethane resin is (a) a polyisocyanate compound containing at least two isocyanate groups per molecule, (b) a polyester polyol, (c) a polyisocyanate compound containing a pyridine ring structure and a sulfonic acid group or a salt thereof and (d) reaction products of polyols containing acidic groups.

[0089] As an embodiment, the (c) polyhydric alcohol containing a pyridine ring structure and a sulfonic acid group or a salt thereof is a polyhydric alcohol having a structure shown in formula (1);

[0090]

[0091] Among them, R 1 selected from hydrogen and substituted or unsubstituted C 1 ~C 6 alkyl;

[0092] R 2 selected from hydrogen, substituted or unsubstituted C 1 ~C 6 Alkyl groups and monovalent positive ions;

[0093] R 3 selected from hydrogen, substituted or unsubstituted C 1 ~C 6 Alkyl, substituted or unsubstituted C 1 ~C 6 Heteroalkyl;

[0094] R 4 , R 5 , R 6 At least two of are independently hydroxy-substituted C...

Embodiment 1

[0114] The preparation of embodiment 1 aqueous polyurethane emulsion

[0115] 1 # Waterborne Polyurethane Emulsion

[0116] In the reactor with stirrer, thermometer, cooler, add the PBA (number average molecular weight is 2000) of 200g and the sulfonate salt diol (structure is as shown in formula (2) of 200g, polymer in the preparation process Ethylene glycol is selected from PEG-2000), vacuum dehydrated at 100°C for 1 hour, and the temperature starts to drop when the water content is less than 0.1% by sampling;

[0117] When the temperature drops to 90°C, add 12.1g of IPDI, 18.6g of HDI and 0.05g of stannous octoate (T-9) catalyst to carry out prepolymerization reaction, and the reaction time is 4h;

[0118] Subsequently, 1.2 g of dimethylolpropionic acid (DMPA) and 0.05 g of T-9 catalyst were added for further reaction, the reaction temperature was 80° C., and the reaction time was 2 h.

[0119] Cool the above prepolymer to 50°C, add 178.5g of acetone to dissolve the pr...

experiment example 1

[0138] The characterization of experimental example 1 aqueous polyurethane emulsion

[0139] Solid Content of Waterborne Polyurethane Emulsion

[0140] Using the method described in GB / T 1725-2007, confirm that the 1 prepared in Example 1 # ~4 # Solid content of aqueous polyurethane emulsion.

[0141] 1 # The solid content of the aqueous polyurethane emulsion is 50.8%, and the appearance is milky white with blue light.

[0142] 2 # The solid content of the water-based polyurethane emulsion is 50.4%, and the appearance is milky white with blue light.

[0143] 3 # The solid content of the water-based polyurethane emulsion is 51.2%, and the appearance is milky white with blue light.

[0144] 4 # The solid content of the water-based polyurethane emulsion is 50.3%, and the appearance is milky white with blue light.

[0145] Particle Size of Waterborne Polyurethane Emulsion

[0146] Confirm the 1 prepared in embodiment 1 with Beckman Coulter LS 13 320 laser particle siz...

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
Average molecular weightaaaaaaaaaa
Average molecular weightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a waterborne polyurethane emulsion, and a preparation method and an application thereof. The waterborne polyurethane emulsion includes a polyurethane resin; and the polyurethane resin is a reaction product of (a) a polyisocyanate compound containing at least two isocyanate groups in every molecule, (b) a polyester polyol, (c) a polyol containing pyridine ring structure anda sulfonic acid group or its salt and (d) a polyol containing an acidic group. The polyurethane resin of the waterborne polyurethane emulsion contains a nonionic hydrophilic segment, the sulfonic acid group and the pyridine ring structure, so the waterborne polyurethane emulsion has the advantages of excellent stability, good yellowing resistance, high bond strength and good resistance to physical shrinkage.

Description

technical field [0001] The invention relates to the field of water-based polymer materials, in particular to water-based polyurethane emulsion, its preparation method and application. Background technique [0002] Water-based polyurethane uses water as the dispersion medium and is a green polymer material. It has been widely used in adhesives, coatings, paper coatings, leather finishing agents, fiber or fabric treatment agents and other products. [0003] According to the different hydrophilic groups on the molecular chain of water-based polyurethane, it can be divided into non-ionic, cationic and anionic water-based polyurethane. Among them, the hydrophilic center of anionic water-based polyurethane is generally carboxylate or sulfonate. [0004] At present, the commercially available water-based polyurethane products are mainly carboxylate-type water-based polyurethanes with low solid content, generally only 15% to 40%. Therefore, increasing the solid content of water-bas...

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): C08G18/66C08G18/50C08G18/42C08G18/12C08G18/34C08G18/32C09J175/08C09J175/06C09D175/08C09D175/06C09D11/102
CPCC08G18/12C08G18/4238C08G18/4277C08G18/5072C08G18/6618C08G18/6625C09D11/102C09D175/06C09D175/08C09J175/06C09J175/08C08G18/348C08G18/3228
Inventor 屠晓华李加友缪程平张洋徐雅玲于建兴
Owner JIAXING UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com