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Epoxy resin composition, and wet-process ultrasonic degradation method and application thereof

An epoxy resin, ultrasonic degradation technology, applied in the direction of educts, recycling technology, plastic recycling, etc., can solve the problems of increasing recycling costs, organic products can not be well recyclable, etc., to save resources and a good environment. Benefit and economic benefits, the effect of excellent performance

Active Publication Date: 2014-12-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly realizes the separation and recovery of fibers, and the degraded organic products cannot be recycled well, and a large amount of acid and alkali are used in the degradation process, which increases its recycling cost

Method used

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  • Epoxy resin composition, and wet-process ultrasonic degradation method and application thereof
  • Epoxy resin composition, and wet-process ultrasonic degradation method and application thereof
  • Epoxy resin composition, and wet-process ultrasonic degradation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042](1) Dissolve 7.14g (0.02mol) of N,N'-(4,4'-methylenediphenyl)bismaleimide (CAS No.13676-54-5)amine into 50mL of anhydrous tetrahydrofuran, and then the solution was added to a 100mL three-necked flask with magnetic stirring and a condenser, and the system was filled with nitrogen for protection. Start the stirrer, water bath, slowly dropwise add 6.16g (0.04mol) furan methyl glycidyl ether (CAS No. 5380-87-0), after the dropwise addition, the system is warmed up to 66°C, and the tetrahydrofuran is refluxed for 24 hours. After the reaction was completed, the system was cooled to room temperature, and the reactant was poured into a large amount of diethyl ether. The precipitate was filtered off, washed several times with methanol, and then vacuumed (pressure3 Pa) dry. The obtained powder was dissolved in 5 mL of acetone, and the solution was added dropwise into 500 mL of ether. Finally, the precipitate was filtered out, vacuum (pressure3 Pa) and dry, you can get furyl met...

Embodiment 2

[0049] (1) The preparation of cured epoxy resin is the same as in Example 1.

[0050] (2) The product was pulverized and swelled in DMSO, and then ultrasonically degraded at 10° C. with a power of 250 W for 3 hours using a cell disintegrator. Centrifuge to separate insolubles and solubles, dialyze the clear layer solution with methanol to remove DMSO, filter and collect the solid in a vacuum oven to dry to remove methanol, weigh and calculate the degradation yield to be 85%, and the product is subjected to gel permeation column chromatography (GPC) measured its molecular weight to be 48,300.

Embodiment 3

[0052] (1) The preparation of cured epoxy resin is the same as in Example 1.

[0053] (2) The product was pulverized and swelled in DMSO, and then ultrasonically degraded at 30° C. with 200 W power for 3 hours using a cell disintegrator. Centrifuge the insolubles and solubles, dialyze the clear layer solution with methanol to remove DMSO, filter and collect the solid in a vacuum oven to dry to remove methanol, weigh and calculate the degradation yield to be 52%, and the product is subjected to gel permeation column chromatography (GPC) measured its molecular weight to be 95,600.

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Abstract

The invention discloses an epoxy resin composition which comprises an epoxy resin and a curing agent, wherein the general formula of the epoxy resin is disclosed as Formula (I). In the Formula (I), A is disclosed in the specification, and n=2-8. The curing agent is at least one of ethylenediamine, hexamethylendiamine, cyclohexamethylendiamine, diethylenetriamine and triethylenetetramine. The invention also discloses a wet-process ultrasonic degradation method of an epoxy resin curing substance prepared by mixing and curing the epoxy resin composition, which comprises the following steps: pulverizing the epoxy resin curing substance prepared by mixing and curing the epoxy resin and curing agent, mixing with a non-proton polar solvent, swelling, and carrying out ultrasonic degradation treatment to obtain the soluble high polymer. The method has the advantages of mild degradation conditions and high efficiency, and can implement regeneration and recycling of the epoxy resin.

Description

technical field [0001] The invention relates to the field of recycling of cured epoxy resins, in particular to an epoxy resin composition and its wet ultrasonic degradation method and application. Background technique [0002] Epoxy resin, phenolic resin and unsaturated polyester resin are three general-purpose thermosetting resins. They are the largest and most widely used varieties of thermosetting resins. The so-called thermosetting resin, as the name suggests, has the characteristics of heat hardening molding (also known as thermosetting molding). Epoxy resins contain unique epoxy groups, active groups and polar groups such as hydroxyl groups and ether bonds, so they have many excellent properties and are widely used in coatings, adhesives, composite materials, electronic and electrical materials, Industrial fields such as engineering materials and civil construction materials. This is mainly because epoxy resin undergoes a chemical reaction during its processing to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/18C08J11/28C08J11/04C08L63/00C08G59/50
CPCY02P20/143Y02W30/62
Inventor 张兴宏闵玉勤杜滨阳
Owner ZHEJIANG UNIV
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