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A kind of recyclable, repairable thermosetting resin, preparation method and application

A cyclic recycling, thermosetting technology, applied in the direction of adhesive types, coatings, adhesives, etc., can solve the problems of limited popularization, harsh recycling conditions, expensive catalysts, etc., and achieve easy industrial production, low cost, and high yield. Effect

Active Publication Date: 2022-03-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their recovery conditions are harsh and the catalysts are expensive, which limits their popularization and use

Method used

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  • A kind of recyclable, repairable thermosetting resin, preparation method and application
  • A kind of recyclable, repairable thermosetting resin, preparation method and application
  • A kind of recyclable, repairable thermosetting resin, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1 part of 4,4-dihydroxydiphenyl sulfone, 3 parts of triphenylphosphine, 2 parts of N-hydroxyphthalimide, 5 parts of diisopropyl azodicarboxylate and 100 parts of dimethyl Sulfone, in N 2 Under protection, after stirring at -60°C for 24 hours, add 6 parts of hydrazine hydrate to react at -20°C for 48 hours, recrystallize in dichloromethane, filter and dry to obtain Hydroxyamino monomer 1 .

Embodiment 2

[0041] 2 parts of 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), 5 parts of triphenylphosphine, 6 parts of N-hydroxyphthalimide, 10 parts of diisoazodicarboxylate Propyl ester and 50 parts of tetrahydrofuran were added into the three-necked flask, and in N 2 Under protection, after stirring at -50°C for 12 hours, add 8 parts of hydrazine hydrate to react at -10°C for 48 hours, recrystallize in dichloromethane, suction filter and dry to obtain Hydroxyamino monomer 2 .

Embodiment 3

[0043] 5 parts of 4,4'-(hexafluoroisopropylidene) diphenol (bisphenol F), 7 parts of triphenylphosphine, 10 parts of N-hydroxyphthalimide, 10 parts of azodicarboxylic acid Diisopropyl ester and 50 parts of tetrahydrofuran are added in the there-necked flask, and 2 Under protection, after stirring at -50°C for 18 hours, add 12 parts of hydrazine hydrate to react at -10°C for 48 hours, recrystallize in dichloromethane, filter and dry to obtain Hydroxyamino mono Body 3 .

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PUM

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Abstract

A recyclable and repairable thermosetting resin, a preparation method and application thereof belong to the technical field of thermosetting resin materials. The following components of the thermosetting resin in parts by weight are hybridized through double dynamic covalent bonds, so that hydroxyl amino groups, amino groups and aldehyde monomers undergo Schiff base reaction: 1-50 parts of hydroxyl amino monomers, solvent 1 ‑100 parts, multifunctional aldehyde 1‑100 parts, crosslinking agent 1‑50 parts. The following components in parts by weight of the hydroxyl amino monomer are obtained through the acylation reaction of the amino group and the acid anhydride group: 1-20 parts of the hydroxyl monomer, 1-300 parts of the solvent, 3-60 parts of hydrazine hydrate, N- 1-80 parts of hydroxyphthalimide, 2-80 parts of triphenylphosphine, and 1-40 parts of diisopropyl azodicarboxylate. The thermosetting resin preparation method of the present invention can be realized on traditional simple synthesis equipment, has low cost, is environmentally friendly, and is easy to realize industrialized production.

Description

technical field [0001] The invention relates to the technical field of thermosetting resin materials, and more specifically, relates to a recyclable and repairable thermosetting resin, a preparation method and an application thereof. Background technique [0002] Thermosetting resins are a class of high-performance polymers known worldwide for their excellent mechanical strength, excellent thermal stability, excellent chemical resistance, and excellent dielectric properties. Thermosetting resins are widely used in industries such as aerospace, high-performance coatings, automotive, and microelectronics. However, most conventional polyimides, such as commercially available DuPont-Kapton polyimide films, epoxy resins, and phenolic resins, are difficult to reprocess and treat with heat or solvents due to their poor solubility and infusibility Recycle. These materials do not degrade rapidly, therefore, disposal of these materials after aging can cause serious environmental pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/08C08L61/22C09D161/22C09J161/22
CPCC08G12/08C08L61/22C09D161/22C09J161/22C08L2201/08
Inventor 东为富李广龙张旭辉李婷汪洋白绘宇张胜文陈明清
Owner JIANGNAN UNIV