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

A lignosulfonate dispersed self-healing polyurea coating and its preparation method, coating and application

A lignosulfonate, self-healing technology, used in lignin coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor epoxy resin flexibility, easy cracking, poor low temperature flexibility, etc. Inexpensive, abundant sources, overcoming difficult-to-repair effects

Active Publication Date: 2019-08-20
SOUTH CHINA UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexibility of epoxy resin is poor, and it is easy to crack under external impact or temperature changes, and the poorer the flexibility of epoxy resin at low temperature, the application of epoxy resin in the corrosion resistance of marine steel is greatly limited.

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 lignosulfonate dispersed self-healing polyurea coating and its preparation method, coating and application
  • A lignosulfonate dispersed self-healing polyurea coating and its preparation method, coating and application
  • A lignosulfonate dispersed self-healing polyurea coating and its preparation method, coating and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) After the 2% wheat straw pulp sodium lignosulfonate of 10g is added to the 30mL white lid glass sample, in the sample bottle, add the PMDI of 0.5g and the IPDI of 2.5g that mix homogeneously, mechanically under 11000rpm / min rotating speed Emulsify for 3 minutes to obtain an O / W type pickering emulsion and set it aside.

[0050] (2) At room temperature, add 0.01mol amino-terminated polyether D-2000 and 0.012mol HDI to a 150mL beaker, raise the temperature of the water bath to 75°C (5°C / min) at a constant speed and react at 300rpm for 1h to obtain viscous and transparent HDI Prepolymer, wait for the prepolymer to cool down at room temperature.

[0051] (3) At room temperature, after adding the emulsion of step (1) to the prepolymer of step (2), add 0.001mol of a hindered amine chain extender dissolved in 1mL of toluene and 0.05mol of amino-terminated polyether D-2000, Mechanically stirred at 300 rpm for 1 h.

[0052] (4) Polish the steel sheet with sandpaper, rinse ...

Embodiment 2

[0056] (1) After adding 6g of 0.5% wheat straw pulp sodium lignosulfonate to a 30mL glass sample with a white lid, add 1g of MDI and 5g of IPDI to the sample bottle, and mechanically emulsify at 11000rpm / min for 30s , to obtain an O / W type pickering emulsion.

[0057] (2) At room temperature, add 0.01mol amino-terminated polyether D-2000 and 0.012mol HDI to a 150mL beaker, raise the temperature of the water bath to 45°C (5°C / min) at a constant speed and react at 200rpm for 1.5h to obtain viscous and transparent HDI prepolymer, wait for the prepolymer to cool down at room temperature.

[0058] (3) At room temperature, after adding the emulsion of step (1) to the prepolymer of step (2), add 0.001mol of a hindered amine chain extender dissolved in 1mL of toluene and 0.05mol of amino-terminated polyether D-2000, Mechanically stir at 200rpm for 30min.

[0059] (4) Polish the steel sheet with sandpaper, rinse with acetone and dry. The compound in step (3) was coated on the steel ...

Embodiment 3

[0062] (1) After the 1% bamboo pulp sodium lignosulfonate of 4g was added to the 30mL white cover glass sample, in the sample bottle, add the PMDI of 0.5g and the IPDI of 0.5g that mix homogeneously, mechanically under 11000rpm / min rotating speed Emulsify for 30s to obtain an O / W type pickering emulsion.

[0063] (2) At room temperature, add 0.01mol amino-terminated polyether D-2000 and 0.012mol HDI to a 150mL beaker, raise the temperature of the water bath to 60°C (5°C / min) at a constant speed, and stir mechanically at 300rpm for 1h to obtain viscous and transparent HDI Prepolymer, wait for the prepolymer to cool down at room temperature.

[0064] (3) At room temperature, after adding the emulsion of step (1) to the prepolymer of step (2), add 0.001mol of a hindered amine chain extender dissolved in 1mL of toluene and 0.05mol of amino-terminated polyether D-2000, Mechanical stirring was performed at 300 rpm for 40 min.

[0065] (4) Polish the steel sheet with sandpaper, rin...

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 diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of polymer materials and discloses a lignosulfonate dispersed self-healing polyurea coating, its preparation method, coating and application. The coating of the present invention is obtained by reacting the following components by mass: 1 to 10 parts of lignosulfonate-embedded healing agent microcapsules; 10 to 100 parts of polyurea prepolymer; 20 to 120 parts of amino-terminated polyether and A mixture of hindered amine chain extenders. The present invention also provides a preparation method of the above-mentioned coating and a coating based thereon. The present invention obtains a self-healing polyurea coating by incorporating microcapsules of lignin sulfonate embedded healing agent into the polyurea coating. The preparation of the self-healing polyurea coating expands the role of lignin in polymer materials. Application, while overcoming the problem that polyurea coating is difficult to repair after stress damage, it can be better applied to steel structure anti-corrosion and can be used in the field of material surface protection. It has a good application as a marine steel structure material. prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a lignin sulfonate dispersed self-healing polyurea coating and a preparation method, coating and application thereof. Background technique [0002] Steel structures are widely used in the construction of marine facilities, such as offshore oil production platforms, submarine pipelines, tunnels, and underwater parts such as ships. However, in the marine and atmospheric environment, the content of salt spray is high and the humidity is high, and it is easy to form a corrosive water film on the surface of the steel, which has a strong corrosion effect. The corrosion rate of steel exposed to sea fog long-term saturated air is lower than that of ordinary atmosphere. 8 times. Therefore, the service life of the steel structure is greatly shortened due to marine atmospheric corrosion, and the maintenance cost in the later period is doubled, so the steel structure m...

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): C09D175/02C09D5/08C08G18/64
CPCC09D175/02C08G18/6492C09D5/08C08G18/7664C08G18/755C08G18/724C08G18/73C08G18/10C08G18/5024C08G18/7671C09D7/65C08K9/10C09D197/005C08G18/50
Inventor 钱勇邱学青李岚杨东杰刘伟峰欧阳新平楼宏铭易聪华
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