High heat resistant epoxy resin and preparation method thereof

An epoxy resin, high heat resistance technology, applied in the field of polymer fine chemicals, can solve the problems of poor compatibility and difficult to meet the manufacturability, and achieve the effect of improving toughness, solving manufacturability problems, and improving the degree of cross-linking

Inactive Publication Date: 2019-10-15
张家港楚人新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional engineering plastics are poorly compatible with epoxy resins and cannot be used because they are prone to phase separation through simple blending; the viscosity of the resin will be significantly increased through graft modification, so it is difficult to meet the manufacturability required for molding

Method used

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  • High heat resistant epoxy resin and preparation method thereof
  • High heat resistant epoxy resin and preparation method thereof
  • High heat resistant epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of high heat resistance epoxy resin, concrete steps are as follows:

[0023] (1) Preparation of hydroxyl-terminated oligopolyethersulfone

[0024] Dissolve 4mol bisphenol A and 3mol 4,4'-dichlorodiphenylsulfone in 2000g ethanol with a volume fraction of 90%, add 5.4molKOH, reflux and stir for 5h, then add excess HCl to neutralize, then add 2000g distilled water to The precipitate is precipitated, and the precipitate is washed with water, washed with 50% ethanol aqueous solution, and then dried to obtain a hydroxyl-terminated oligopolyethersulfone with a degree of polymerization of 6;

[0025] (2) Preparation of epoxy-terminated modified oligopolyethersulfone

[0026] Dissolve 50 g of the hydroxyl-terminated oligopolyethersulfone obtained in step (1) in 200 g of ethanol with a volume fraction of 95%, add 20 g of 40 wt % KOH aqueous solution, add 10 g of epichlorohydrin dropwise within 2 h under reflux stirring, and drop After the addition i...

Embodiment 2

[0030] A kind of preparation method of high heat resistance epoxy resin, concrete steps are as follows:

[0031] (1) Preparation of hydroxyl-terminated oligopolyethersulfone

[0032] Dissolve 5 mol of bisphenol A and 4 mol of 4,4'-dichlorodiphenyl sulfone in 2000 g of ethanol with a volume fraction of 95%, add 8 mol of KOH, reflux and stir for 4.5 hours, then add excess HCl to neutralize, then add 2000 g of distilled water until precipitation occurs. The precipitate is washed with water, washed with 50% ethanol aqueous solution, and then dried to obtain a hydroxyl-terminated oligopolyethersulfone with a degree of polymerization of 8;

[0033] (2) Preparation of epoxy-terminated modified oligopolyethersulfone

[0034] Dissolve 50 g of the hydroxyl-terminated oligopolyethersulfone obtained in (1) in 200 g of ethanol with a volume fraction of 95%, add 17.5 g of 40 wt % KOH aqueous solution, add 10 g of epichlorohydrin dropwise within 2 h under reflux stirring, and dropwise add ...

Embodiment 3

[0038] A kind of preparation method of high heat resistance epoxy resin, concrete steps are as follows:

[0039] (1) Preparation of hydroxyl-terminated oligopolyethersulfone

[0040] Dissolve 6 mol of bisphenol A and 5 mol of 4,4'-dichlorodiphenyl sulfone in 2000 g of ethanol with a volume fraction of 90%, add 11 mol of KOH, reflux and stir for 5.5 hours, then add excess HCl to neutralize, then add 2000 g of distilled water until precipitation occurs. The precipitate is washed with water, washed with 50% ethanol aqueous solution, and then dried to obtain hydroxyl-terminated oligopolyethersulfone with a degree of polymerization of 10;

[0041] (2) Preparation of epoxy-terminated modified oligopolyethersulfone

[0042] Dissolve 50g of the hydroxyl-terminated oligopolyethersulfone obtained in (1) in 200g of ethanol with a volume fraction of 95%, add 20g of 40wt% KOH aqueous solution, add 10g of epichlorohydrin dropwise within 2 hours under reflux and stirring, and after the drop...

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Abstract

The invention relates to a high heat resistant epoxy resin and a preparation method thereof. The high heat resistant epoxy resin is obtained by curing of epoxy terminated modified oligomeric polyethersulfone and bisphenol A epoxy resin. By introducing the polyether sulfone structure with high heat resistance and good flexibility into the main chain of epoxy resin, the heat resistance and flexibility of the epoxy resin are greatly improved, and the obtained epoxy resin has the characteristics of low viscosity, good heat resistance and high flexibility, and can be widely applied to the field ofcarbon fiber composite materials with high heat resistance and high flexibility requirements.

Description

technical field [0001] The invention relates to a high heat-resistant epoxy resin and a preparation method thereof, belonging to the technical field of polymer fine chemicals. Background technique [0002] Epoxy resin has the advantages of high bonding strength, low curing shrinkage, high hardness, good wear resistance, good processing performance, good electrical insulation, easy access to raw materials, and low cost. It is used as an adhesive, packaging glue, composite material Materials such as resins are used in a wide variety of fields, from everyday life to aerospace. [0003] The heat distortion temperature of conventional epoxy resin generally does not exceed 120°C, which is difficult to meet the requirements of carbon fiber composite materials in aerospace and other fields. Through the modification of thermoplastic engineering plastics, the heat resistance of epoxy resin can be significantly improved, and its toughness can be improved at the same time, which greatl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L81/06C08G75/23
CPCC08G75/23C08L63/00C08L81/06C08L2201/08C08L2205/04
Inventor 黄驰胡铭杰周宇恒唐晓林任仁捷吴磊彭怀萱
Owner 张家港楚人新材料科技有限公司
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