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

Long-activation-period water-based two-component polyurethane curing agent as well as preparation method and application thereof

A two-component polyurethane technology with long activation period, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as excessive steric hindrance and difficult reaction, slow down the reaction speed, increase activation time, and simple operation process Effect

Inactive Publication Date: 2021-04-20
SOUTH CHINA UNIV OF TECH +1
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned technology uses 4-aminotoluene-2-sulfonic acid as a hydrophilic modifier, which has a group with too much hindrance, and needs to carry out grafting reaction at a temperature exceeding 100°C, and the reaction is relatively difficult

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
  • Long-activation-period water-based two-component polyurethane curing agent as well as preparation method and application thereof
  • Long-activation-period water-based two-component polyurethane curing agent as well as preparation method and application thereof
  • Long-activation-period water-based two-component polyurethane curing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of water-based two-component polyurethane curing agent

[0049] Raw material composition and consumption are as follows table 1:

[0050] Table 1

[0051]

[0052] Preparation process: Under the protection of nitrogen, transfer HDI, MPEG-400, and dibutyltin dilaurate to a four-necked round-bottomed flask equipped with mechanical stirring, reflux tube, thermometer, and nitrogen inlet and outlet, and raise the temperature of the above mixture to 80°C for reaction 3h, when the NCO content of the system reaches the theoretical value, cool down to 50°C and keep for 30min, cool to room temperature and then discharge.

[0053] (2) Preparation of two-component water-based paint: mix the above-mentioned components with Bayhydur XP 2487 according to the quality of the long-potency water-based two-component polyurethane curing agent raw material of 3%, and make a long-potency water-based two-component polyurethane Hardener.

[0054] Performance of water-based...

Embodiment 2

[0068] (1) Preparation of water-based two-component polyurethane curing agent

[0069] Raw material composition and consumption are as follows table 3:

[0070] table 3

[0071]

[0072] Preparation process: Under the protection of nitrogen, transfer TDI and MPEG-400 to a four-necked round bottom flask equipped with mechanical stirring, reflux tube, thermometer and nitrogen inlet and outlet, and raise the temperature of the above mixture to 50°C for 2 hours to reach the NCO content of the system When the theoretical value is reached, keep warm for 30 minutes, cool to room temperature and discharge.

[0073] (2) Preparation of two-component water-based paint: mix the components prepared above with Bayhydur XP 2487 according to the quality of the long-potency water-based two-component polyurethane curing agent raw material of 5%, and make a long-potency water-based two-component polyurethane Hardener.

[0074] Performance of water-based polyurethane curing agent: solid con...

Embodiment 3

[0080] (1) Preparation of water-based two-component polyurethane curing agent

[0081] Raw material composition and consumption are as follows table 5:

[0082] table 5

[0083]

[0084] Preparation process: under the protection of nitrogen, transfer IPDI, MPEG-550 and dibutyltin dilaurate to a four-neck round bottom flask equipped with mechanical stirring, reflux tube, thermometer and nitrogen inlet and outlet, and then raise the temperature to 80°C React for 3 hours. When the NCO content in the system reaches the theoretical value, cool down to 50°C and keep for 30 minutes. Cool to room temperature and discharge.

[0085] (2) Preparation of two-component water-based paint: mix the above-mentioned components with Bayhydur XP 2655 according to the quality of the long-potency water-based two-component polyurethane curing agent raw material of 2.5%, and make a new long-potency water-based two-component Polyurethane curing agent.

[0086] Performance of water-based polyuret...

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
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a long-activation-period water-based two-component polyurethane curing agent as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing monofunctional hydrophilic polyether and a diisocyanate monomer at room temperature, adding a catalyst, conducting heating to 50 DEG C and 90 DEG C, conducting reacting for 1-4h until the NCO content of the system reaches a theoretical value, adding a polymerization inhibitor, conducting cooling to room temperature, and conducting discharging, and adding a polyisocyanate curing agent accounting for 80-99.5% of the total mass of the raw materials into the obtained product to prepare the long-activation-period water-based two-component polyurethane curing agent. The non-ionic hydrophilic long-chain-containing isocyanate compound is introduced into the isocyanate curing agent and matched with the water-based hydroxyl resin for paint preparation, and the reaction speed of -NCO and -OH is reduced in the film forming process due to the shielding effect of a hydrophilic long chain, so that the activation time of paint preparation is prolonged, the gloss of a coating can be reduced, and the construction performance of the curing agent is improved.

Description

technical field [0001] The invention relates to a polyurethane curing agent, in particular to a water-based two-component polyurethane curing agent with a long activation period and a preparation method thereof. The water-based two-component polyurethane curing agent of the present invention is used to extend the activation period of the water-based two-component polyurethane coating and construction performance. Background technique [0002] Waterborne two-component polyurethane coating has the characteristics of low film-forming temperature, strong adhesion, good abrasion resistance and good weather resistance. It is an environmentally friendly coating that can replace solvent-based two-component polyurethane coatings, and has gradually become a research hotspot today. . It is composed of water-based hydroxyl resin (A component) and water-based polyisocyanate curing agent (B component). Usually, the hydroxyl resin is very easy to cross-link with the isocyanate in the wate...

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): C09D175/08
Inventor 瞿金清韩凯郑佳蓉朱延安
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