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Recyclable and repairable thermosetting resin, preparation method and application thereof

A cyclic recycling, thermosetting technology, applied in the direction of adhesive types, coatings, adhesives, etc., can solve the problems of harsh recycling conditions, limited promotion and use, and expensive catalysts.

Active Publication Date: 2021-06-01
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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  • Recyclable and repairable thermosetting resin, preparation method and application thereof
  • Recyclable and repairable thermosetting resin, preparation method and application thereof
  • Recyclable and repairable thermosetting resin, preparation method and application thereof

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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Abstract

The invention discloses a recyclable and repairable thermosetting resin, a preparation method and application thereof, and belongs to the technical field of thermosetting resin materials. The thermosetting resin is prepared from the following components in parts by weight through double dynamic covalent bond hybridization: 1-50 parts of a hydroxyamino monomer, 1-100 parts of a solvent, 1-100 parts of polyfunctional aldehyde and 1-50 parts of a cross-linking agent to carry out a Schiff base reaction on hydroxyamino, amino and aldehyde monomers, wherein the hydroxyamino monomer is prepared from the following components in parts by weight: 1 to 20 parts of hydroxyl monomer, 1 to 300 parts of solvent, 3 to 60 parts of hydrazine hydrate, 1 to 80 parts of N-hydroxyphthalimide, 2 to 80 parts of triphenylphosphine and 1 to 40 parts of diisopropyl azodicarboxylate through acylation reaction of amino and anhydride group. The preparation method of the thermosetting resin disclosed by the invention can be realized on traditional simple synthesis equipment, is low in cost and environment-friendly, and is easy to realize industrial 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 Applications(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
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