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

Self-repairing cross-linked polyurethane and preparation method thereof

A technology of polyurethane and ice-water bath, which is applied in the direction of organic chemistry, can solve the problems of increasing the consumption of polyurethane raw materials, easily producing cracked appearance, and destroying the ecological environment, etc., and achieves the effects of wide range of application effects, good self-repair function, and protection of the ecological environment

Inactive Publication Date: 2020-08-25
GUIZHOU MINZU UNIV
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, products made of polyurethane are prone to cracks or surface damage after long-term use, so the product often needs to be repaired or replaced, which greatly increases the consumption of polyurethane raw materials, and at the same time, there is a lot of waste of polyurethane after use , destroy the ecological environment

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 cross-linked polyurethane and preparation method thereof
  • Self-repairing cross-linked polyurethane and preparation method thereof
  • Self-repairing cross-linked polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a method for preparing self-repairing cross-linked polyurethane, comprising the following steps:

[0044] S1. Mix 92.52g of epichlorohydrin and 98.1g of furfuryl alcohol, add the catalyst tetrabutylammonium bromide, put it into a 500ml three-necked flask, put it in an ice-water bath with a temperature of 2°C, and let it stand for 4 hours to obtain a mixed solution.

[0045] S2. Add 160ml of sodium hydroxide solution with a mass fraction of 50% dropwise to the mixed solution obtained in step S1, place it in an ice-water bath for 2 hours, extract it with anhydrous ether three times, wash it with water three times, and recover the ether by rotary steaming , and then dried with anhydrous magnesium sulfate, let it stand overnight, and then filtered it with suction. The solution was distilled under reduced pressure at 110°C to obtain a crude product, which was furfuryl glycidyl ether FGE.

[0046] S3. Take another 112.08g of furfurylamine, add it to a...

Embodiment 2

[0053] This embodiment provides a method for preparing self-repairing cross-linked polyurethane, comprising the following steps:

[0054] S1. Mix 92.52g of epichlorohydrin and 98.1g of furfuryl alcohol, add the catalyst tetrabutylammonium bromide, put it into a 500ml three-necked flask, place it in an ice-water bath with a temperature of 4°C, and place it for 3.5h to obtain a mixed solution .

[0055] S2. Add 160ml of sodium hydroxide solution with a mass fraction of 50% dropwise to the mixed solution obtained in step S1, place it in an ice-water bath for 2 hours, extract it with anhydrous ether three times, wash it with water three times, and recover the ether by rotary steaming , and then dried with anhydrous magnesium sulfate, let it stand overnight, and then filtered it with suction. The solution was distilled under reduced pressure at 110°C to obtain a crude product, which was furfuryl glycidyl ether FGE.

[0056] S3. Take another 112.08g of furfurylamine, add it to a ne...

Embodiment 3

[0063] This embodiment provides a method for preparing self-repairing cross-linked polyurethane, comprising the following steps:

[0064] S1. Mix 92.52g of epichlorohydrin and 98.1g of furfuryl alcohol, add the catalyst tetrabutylammonium bromide, put it into a 500ml three-neck flask, place it in an ice-water bath at 0°C for 4 hours, and obtain a mixed solution.

[0065] S2. Add 160ml of sodium hydroxide solution with a mass fraction of 50% dropwise to the mixed solution obtained in step S1, then place it in an ice-water bath for 1.5h, extract it three times with anhydrous ether, wash it with water three times, and dilute the ether by rotary steaming Recover, dry with anhydrous magnesium sulfate, let it stand overnight, and then carry out suction filtration, take the solution at 110°C, and distill under reduced pressure to obtain the crude product, which is furfuryl glycidyl ether FGE.

[0066] S3. Take another 112.08g of furfurylamine, add it to a new three-necked flask, add ...

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

No PUM Login to View More

Abstract

The invention relates to self-repairing cross-linked polyurethane and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: mixing epoxy chloropropane and furfuryl alcohol, and adding a catalyst tetrabutylammonium bromide; dropwise adding a sodium hydroxide solution, then putting the mixture into an ice-water bath for 1.5-2.5 hours, and carrying out reduced pressure distillation after extraction, water washing and water removal treatment to obtain a crude product; taking furfuryl amine, adding methylbenzene to dissolve furfuryl amine, adding a catalyst tetrabutylammonium bromide, dropwise adding the crude product, and reacting at 55-70 DEG C for 3 hours to obtain a monomer; adding DMF, then adding isocyanate, heating to 65-85 DEG C, and stirring to react for 12-18 minutes; and adding 4, 4 '-diphenylmethane bismaleimide, reacting for 24 h at the temperature of 60-75 DEG C, and taking out to obtain the self-repairing cross-linked polyurethane. The preparation method can efficiently prepare the self-repairing cross-linked polyurethane, and the prepared self-repairing cross-linked polyurethane is good in self-repairing effect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a self-repairing cross-linked polyurethane and a preparation method thereof. Background technique [0002] Polyurethane is a widely used polymer material, which has the advantages of light weight, good stability, good chemical resistance, excellent resilience and small compression set. So it is widely used in packaging, sound insulation, construction and automobile and other fields. [0003] However, products made of polyurethane are prone to cracks or surface damage after long-term use, so the product often needs to be repaired or replaced, which greatly increases the consumption of polyurethane raw materials, and at the same time, there is a lot of waste of polyurethane after use , destroying the ecological environment. [0004] Therefore, there is an urgent need for a polyurethane polymer material that can repair itself. Contents of the invention [...

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): C08L75/04C08K5/3415C08G18/32C08J3/24C07D307/52
CPCC07D307/52C08G18/3293C08J3/24C08J2375/04C08K5/3415C08L75/04
Inventor 张道海谭芳何敏宝冬梅秦舒浩罗迎春于杰
Owner GUIZHOU MINZU UNIV
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