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

Methods for degrading and recycling cross-linked polymers and reinforced polymer composites

A technology for strengthening composite materials and cross-linked polymers, which is applied in the direction of plastic recycling and recycling technology, and can solve the problems of strong corrosiveness, unsafety, and unfriendly environment of phenol, and achieve mild recovery conditions, stable quality, and easy control. Effect

Pending Publication Date: 2018-01-26
ADESSO ADVANCED MATERIALS WUXI CO LTD
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, depending on the operating conditions, there may be residual charcoal on the carbon fiber surface, which will affect the reuse value of recycled carbon fiber
Prolonged high-temperature treatment may also affect the mechanical properties of these recycled carbon fibers
In addition, catalytic conversion also requires a certain amount of phenol as a medium, and phenol is highly corrosive, unsafe, and environmentally unfriendly

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
  • Methods for degrading and recycling cross-linked polymers and reinforced polymer composites
  • Methods for degrading and recycling cross-linked polymers and reinforced polymer composites
  • Methods for degrading and recycling cross-linked polymers and reinforced polymer composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of embodiment 1 curing agent A

[0034]

[0035] Mix 1000g N-(2-hydroxyethyl)phthalimide, 157g paraformaldehyde, 6.8g anhydrous p-toluenesulfonic acid and 1.5 liters of toluene, DEAN-STARK reflux to separate water. After refluxing for 20 hours, the reaction was completed, lowered to room temperature, added 2 liters of petroleum ether (boiling range: 60-90 ° C), obtained a white precipitate, filtered, washed with 1 liter of petroleum ether, and dried the solid to obtain 950 g of crude product, added 3.4 Lit up 20% NaOH solution, heated and refluxed for 10 hours, cooled, added chloroform / isopropanol (3:1) for extraction, layered, the organic phase was dried with anhydrous sodium sulfate, and distilled under reduced pressure to obtain 200g curing agent A (70Pa vacuum condition The lower boiling range is 71-72°C).

Embodiment 2

[0036] The preparation of embodiment 2 curing agent B

[0037]

[0038] Put 80g of toluene and 440g of 3-chloroglycerin into the reaction flask, add 548g of chloroacetaldehyde dimethyl acetal and 3g of p-toluenesulfonic acid under stirring, and slowly heat up the system. Dean-Stark refluxed methanol for 12-16 hours. After the reaction, the temperature was lowered to below 40°C, and an appropriate amount of sodium carbonate was added to the reaction flask to adjust the pH value of the reaction liquid system to be close to neutral. Then, the reaction liquid was concentrated under reduced pressure, and all the toluene was recovered to obtain 760 g of the chlorinated product intermediate.

[0039] Add 400ml of N,N-dimethylformamide into a three-necked flask, add 231g of phthalimide potassium salt and 86.5g of chlorinated intermediate under stirring, raise the temperature to 150°C, and react for 8 hours. , concentrated under reduced pressure to reclaim DMF, the residue directly ...

Embodiment 3

[0040] The preparation of embodiment 3 curing agent C

[0041]

[0042] 89g of 2-nitropropane, 30g of paraformaldehyde and 100mL of triethylamine were stirred and reacted at 45°C for 0.5 hours. The reaction mixture was filtered to obtain 60 g of 2-methyl-2-nitro-1-propanol.

[0043] 11.9 g of 2-methyl-2-nitro-1-propanol, 5.7 g of 2,2-dimethoxypropane, 0.3 g of p-toluenesulfonic acid, and 500 mL of cyclohexane were mixed, extracted and evaporated with a Dean-Stark receiver of methanol. After 6 hours, the solution was cooled to room temperature, and an appropriate amount of sodium carbonate was added to the reaction flask, and then the reaction solution was concentrated under reduced pressure to obtain 5.7g 2-methyl-1-((2-(2-methyl-2-nitro Propoxy)isopropyl)oxy)-2-nitropropane.

[0044] Mix 1g of 2-methyl-1-((2-(2-methyl-2-nitropropoxy)isopropyl)oxy)-2-nitropropane, 0.1g Raney nickel and 25m methanol, The reduction reaction was conducted by passing hydrogen gas at 55° C. ...

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
Thicknessaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to View More

Abstract

Provided are methods for degrading or recycling a cross-linked polymer or a reinforced composite which include treating the cross-linked polymer or reinforced composite with a peroxide or peroxyacid and an acid, with or without solvent, to give a degradation mixture containing degradation product.

Description

[0001] related application [0002] This application claims priority over US Patent Application No. 62 / 155765, filed May 1, 2015, the entire contents of which are hereby incorporated by reference as a part of this application. technical field [0003] The invention relates to the field of crosslinked polymers and reinforced composites. More specifically, the present invention relates to the recycling of thermoset crosslinked polymers and fiber reinforced composites comprising thermoset crosslinked polymer matrices. Background technique [0004] Epoxy resin is an important class of thermosetting compounds, widely used in adhesives, structural materials, coatings, ceramic manufacturing, printed circuit boards, microelectronic packaging, aerospace industry and other fields. [0005] Epoxy resins have a large global market as adhesives and coatings, and are one of the industry-standard thermoplastic matrices used to manufacture fiber-reinforced plastics (FRP). FRPs are composi...

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): C08J11/28
CPCC08J11/22C08J2300/24Y02W30/62C08G59/50C08G59/245
Inventor 梁波李欣覃兵
Owner ADESSO ADVANCED MATERIALS WUXI CO LTD
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