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High-weatherability epoxy resin used for composite materials

A technology of epoxy resin and composite materials, applied in the field of polymer materials, can solve the problems of loss of physical and mechanical properties, loss of use value, material aging and discoloration, etc., and achieve low cost, excellent anti-color change performance, and excellent weather resistance.

Inactive Publication Date: 2018-03-13
徐伟权
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AI Technical Summary

Problems solved by technology

[0002] When fiber-reinforced epoxy resin composite products are used outdoors, they will be affected by climatic factors such as light, heat, oxygen, humidity, and moisture, which will cause damage to the microstructure, lose their original physical and mechanical properties, and also cause aging and discoloration of the material. , eventually loses use value

Method used

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Embodiment

[0020] Prepare a kind of epoxy resin for high weather resistance composite material of the present invention by the raw material of following mass parts:

[0021] Polylactic acid resin: 100 parts;

[0022] Dimethylethanolamine: 50 parts;

[0023] Stearic acid: 200 parts;

[0024] Ethylene glycol: 1 part;

[0025] Benzyldimethylamine: 1 part.

[0026] Concrete preparation process steps:

[0027] Mix polylactic acid resin and dimethylethanolamine at 130°C at a speed of 200r / min for 30min; filter, add stearic acid to the filtrate, mix and stir at room temperature for 5min at a speed of 200r / min, add Ethylene glycol and benzyldimethylamine were mixed and stirred at room temperature for 5 minutes at a speed of 200 r / min. The obtained resin has a viscosity of 250mPa·s at 25°C, and has good manufacturability; the flexural strength of the resin cast body is 90MPa, and the flexural modulus is 3.44GPa.

[0028] The casting body of the obtained resin was tested according to GB2574-...

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Abstract

The invention discloses an epoxy resin for composite materials with high weather resistance. It is prepared according to the following method: Stir and react polylactic acid resin and dimethylethanolamine at 120-140°C for 30-40 minutes, then filter; add stearic acid to the obtained filtrate, and stir and mix evenly at 20-30°C; Add polyol and catalyst, stir and mix at 20-30°C for 5-10 minutes to obtain high weather resistance epoxy resin; the raw materials used are as follows in parts by mass: polylactic acid resin: 95-105 parts; dimethylethanolamine: 50 ‑80 parts; Stearic acid: 200‑230 parts; Polyol: 1‑1.5 parts; Catalyst: 1‑1.5 parts. The epoxy resin formulation and preparation method of the high weather resistance composite material of the present invention are simple, low in cost and good in manufacturability, and the prepared fiber reinforced epoxy resin composite material has good mechanical properties, excellent anti-color change performance and excellent weather resistance .

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an epoxy resin for composite materials with high weather resistance. Background technique [0002] When fiber-reinforced epoxy resin composite products are used outdoors, they will be affected by climatic factors such as light, heat, oxygen, humidity, and moisture, which will cause damage to the microstructure, lose their original physical and mechanical properties, and also cause aging and discoloration of the material. , and eventually lose its use value. Climatic factors will affect the three aspects of the matrix, internal fibers, and composite interface of the composite material, among which the weather resistance of the matrix plays a major role in the weather resistance of the composite material. Due to the presence of benzene rings and double bonds in the molecular structure of the bisphenol A epoxy resin commonly used in composite materials, the benzene ri...

Claims

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Application Information

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IPC IPC(8): C08G59/02
CPCC08G59/022
Inventor 徐伟权
Owner 徐伟权
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