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Dual-network crosslinked epoxy resin and preparation method thereof

A technology of epoxy resin and double network, applied in the field of epoxy resin, can solve problems such as limiting heat resistance, and achieve the effects of increasing crosslinking density, high thermal decomposition temperature and simple process

Active Publication Date: 2014-11-26
ANHUI SHANFU NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply introducing rigid groups into the molecular structure of epoxy resin, although the large-sized rigid groups can inhibit the thermal movement of molecules, the relatively loose cross-linking structure still limits the further improvement of heat resistance

Method used

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  • Dual-network crosslinked epoxy resin and preparation method thereof
  • Dual-network crosslinked epoxy resin and preparation method thereof
  • Dual-network crosslinked epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 320 g of 5-amino-1-naphthol and 200 g of xylene into a 1000 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a nitrogen introduction device, slowly raise the temperature of the oil bath to 125 ° C, and wait for 5- After amino-1-naphthol was completely dissolved, 240 g of maleimide was dissolved in 280 g of xylene, and slowly added dropwise to the reaction system. After 2 hours of addition, the reaction temperature was controlled at 125° C., and the reaction was continued for 6 hours. After completion of the reaction, cool down and distill off the solvent and excess water under reduced pressure to obtain a yellow semi-solid product. Add 140 g of the obtained yellow semi-solid product and 200 g of methyl isobutyl ketone into a 500 ml four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a nitrogen introduction device, react at 120 ° C for 8 h, cool and distill under reduced pressure to ...

Embodiment 2

[0029] Add 45 g of 5-amino-1-naphthol and 80 g of xylene into a 250 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, and a nitrogen introduction device, and slowly raise the temperature of the oil bath to 115° C., and wait for 5- After amino-1-naphthol was completely dissolved, 35 g of maleimide was dissolved in 80 g of xylene, and slowly added dropwise to the reaction system. After 2 hours of addition, the reaction temperature was controlled at 115° C., and the reaction was continued for 3 hours. After the reaction was completed, it was cooled and the solvent and excess water were distilled off under reduced pressure to obtain a yellow viscous product. Add 14 g of the obtained yellow viscous product and 20 g of methyl isobutyl ketone into a 100 ml four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a nitrogen introduction device, react at 120 ° C for 8 h, cool and distill under reduced pressure ...

Embodiment 3

[0033] Add 4500 g of 5-amino-1-naphthol and 8000 g of xylene in the 25L enamel reactor equipped with electric heating oil bath jacket, mechanical stirring, thermometer, reflux condenser and nitrogen gas introduction device, slowly raise the oil bath temperature to 125°C, after 5-amino-1-naphthol is completely dissolved, dissolve 3800 g of maleimide in 8000 g of xylene, and slowly add it dropwise to the reaction system. After 2 hours of feeding, the reaction temperature is controlled at 125°C, continue Reaction 2h. After the reaction was completed, it was cooled and the solvent and excess water were distilled off under reduced pressure to obtain a yellow viscous product. Add 1,400 g of the obtained yellow viscous product and 2,000 g of methyl isobutyl ketone into a 10 L enamel reactor equipped with an electric heating oil bath jacket, mechanical stirring, thermometer, reflux condenser, and nitrogen introduction device, and react at 120°C for 6 hours, then cool The solvent and ...

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Abstract

The invention discloses a dual-network crosslinked epoxy resin. A preparation method of the dual-network crosslinked epoxy resin comprises the following steps: synthesizing 5-maleimide-1-naphthol by taking maleimide and 5-amino-1-naphthol as major raw materials; and reacting the obtained 5-maleimide-1-naphthol with paraformaldehyde, epoxy chloropropane and sodium hydroxide to obtain the dual-network crosslinked epoxy resin. The obtained epoxy resin contains an epoxy group and a maleimide group, and an epoxy loop-opening and imide polymerization dual-network crosslinked network can be formed in crosslinking and curing processes; and an obtained condensate has the characteristics of superior flame retardance and high heat resistance, and can be taken as a substrate of a high-performance composite material used in a high-temperature environment.

Description

[0001] technical field [0002] The invention belongs to the technical field of epoxy resins, and in particular relates to a double network cross-linked epoxy resin. At the same time, the invention also relates to a preparation method of the double network cross-linked epoxy resin. Background technique [0003] Epoxy resin is an important thermosetting resin and one of the most widely used materials in general polymer composite materials. Epoxy resin not only has good bonding properties, coating properties, mechanical properties, wear resistance and electrical insulation properties, but also has stable chemical properties, good corrosion resistance, good thermal stability, low shrinkage, and easy processing and molding , Low price. Epoxy resin is an important thermosetting resin with excellent adhesive properties, wear resistance, mechanical properties, electrical insulation properties, chemical stability, high and low temperature resistance, low shrinkage, easy processing...

Claims

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Application Information

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IPC IPC(8): C08G59/02
Inventor 任华包秀群叶琳张淑贞
Owner ANHUI SHANFU NEW MATERIAL TECH
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