A kind of toughened epoxy resin composition containing dicyclopentadiene alicyclic structure

A technology of dicyclopentadiene and tough epoxy resin, which is applied in the field of toughened epoxy resin composition and its preparation, can solve the problems of resin brittleness, poor impact resistance, composite material damage, easy cracking, etc., and achieve increased Toughness, low price, and the effect of maintaining performance

Active Publication Date: 2011-12-21
北京蓝星清洗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest weakness of epoxy resin is its poor toughness. After curing, the resin is brittle, has poor impact resistance, and is easy to crack, which greatly restricts its application in high impact resistance...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 40g of glycidylamine epoxy resin JEh-010D (purchased from Changshu Jiafa Chemical Co., Ltd., epoxy value 0.80-0.85) into an oven and heat to 90°C to form a transparent solution with good fluidity. Mix g maleic anhydride (MA) with 6.3g DCPD monomer, stir well, place in the reactor and pass nitrogen gas, heat up at the same time, drop 0.85g distilled water in the process of heating up to 90°C, and then continue to heat up to 120°C to 140°C, react for 2 hours to 3 hours, and finally add the mixture to the heated epoxy resin JEH-010D, then add 0.2g of 2,4-dimethylimidazole, mix well and place in vacuum drying The air bubbles of the mixed solution are removed in the box, and finally poured and solidified. The reaction exothermic curve of the epoxy resin system was tested by differential scanning calorimetry (DSC method). The analysis showed that the curing program was 68°C for 1 hour, 120°C for 2 hours, and 168°C for 2 hours to obtain cured epoxy resin. Base resin. Acc...

Embodiment 2

[0027] 20g of glycidyl amine epoxy resin DTP-777 (purchased from Dalian Qihua Chemical Co., Ltd., epoxy value 0.83-0.90) and 20g of glycidyl ester epoxy resin TDE-86 (purchased from Tianjin Jingdong Chemical Complex Material Co., Ltd., epoxy value 0.88) mixed, then put into an oven and heated to 90 ° C to form a transparent solution with good fluidity, mix 14.45g phthalic anhydride (PA) with 8.5g DCPD monomer, fully Stir, place in the reactor and feed nitrogen, while heating to raise the temperature, drop 1.35g of distilled water in the process of raising the temperature to 90°C, then continue to heat up to 120°C to 140°C, react for 2 hours to 3 hours, and finally add the mixture Add 0.25g of 2-ethyl-4-methylimidazole to the heated epoxy resin, stir well, mix evenly, place in a vacuum drying oven to remove air bubbles from the mixture, and finally cast and solidify. The reaction exothermic curve of the epoxy resin system was tested by differential scanning calorimetry (DSC met...

Embodiment 3

[0029]28g glycidyl amine epoxy resin DTP-777 (purchased from Dalian Qihua Chemical Co., Ltd., epoxy value 0.83-0.90) and 12g glycidyl ester epoxy resin TDE-86 (purchased from Tianjin Jingdong Chemical Complex Material Co., Ltd., epoxy value 0.88) mixed, and then put into an oven and heated to 100 ° C to form a transparent solution with good fluidity. Mix 15.85g tetrahydrophthalic anhydride (THPA) with 7.5g DCPD monomer, Stir well, place in the reactor and feed nitrogen, while heating to raise the temperature, drop 1.45g of distilled water in the process of raising the temperature to 90°C, then continue to heat up to 120°C to 140°C, react for 2 hours to 3 hours, and finally mix the solution Add it to the heated epoxy resin, then add 0.3g benzyldimethylamine, stir well, mix well, put it in a vacuum drying oven to remove the air bubbles of the mixture, and finally cast it to solidify. The reaction exothermic curve of the epoxy resin system was tested by differential scanning calo...

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PUM

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Abstract

The invention relates to a toughened epoxy resin composition containing a dicyclopentadiene ester ring structure and a preparation method thereof. The composition comprises 100 parts of epoxy resin, 25 to 50 parts of acid anhydride curing agent, 10 to 25 parts of dicyclopentadiene, and 0.5 to 5 parts of accelerants. By introducing the dicyclopentadiene ester ring structure, the toughness of the epoxy resin is improved. Meanwhile, because of the dicyclopentadiene ester ring structure, the cured epoxy resin has low water absorption, good air dried property and waterproof and moisture-proof performance.

Description

technical field [0001] The invention relates to an epoxy resin composition, in particular to a toughened epoxy resin composition containing a dicyclopentadiene alicyclic structure and a preparation method thereof. Background technique [0002] Epoxy resin is a typical high-performance thermosetting resin, and it is one of the most commonly used resin matrices in polymer-based composite materials. With a series of excellent performances such as heat and heat, it has been widely used in many fields such as machinery, electronics, aerospace, transportation, sporting goods, and coatings. However, the biggest weakness of epoxy resin is its poor toughness. After curing, the resin is brittle, has poor impact resistance, and is easy to crack, which greatly restricts its application in high impact resistance and fracture resistance occasions. , the performance of carbon fiber cannot be effectively exerted, and its carbon fiber composite material is often damaged due to the premature...

Claims

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Application Information

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IPC IPC(8): C08G59/42C08L63/00C08L63/02
Inventor 杨刚孟秀青刘欣彤陈伟明胡伟
Owner 北京蓝星清洗有限公司
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