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Epoxy resin system for wind blade hand lay-up repair and preparation method thereof

An epoxy resin system and wind blade technology, which is applied in the field of epoxy resin system and its preparation for hand paste repair of wind blades, can solve the problems of large fan blades, affecting safe production, economic losses, etc., and achieve anti-sagging Good, excellent toughness, low operating environment requirements

Active Publication Date: 2014-06-04
EPOXY BASE ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the large shape and complex layering of fan blades, various defects and damages will always occur during the manufacturing and use process, which not only affects safe production, but also causes economic losses.

Method used

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  • Epoxy resin system for wind blade hand lay-up repair and preparation method thereof
  • Epoxy resin system for wind blade hand lay-up repair and preparation method thereof
  • Epoxy resin system for wind blade hand lay-up repair and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]

[0029] Preparation:

[0030] 1) Add bisphenol A epoxy resin, the raw material of the resin, into the reaction kettle, raise the temperature to 60°C, and keep the temperature constant. Add C12~14 alkyl glycidyl ether, fully stir until uniform. Transfer the mixed resin into a sealed container and store at room temperature.

[0031] 2) Add all the raw materials of the curing agent into the reaction kettle, raise the temperature to 70°C, keep the temperature constant, and continue stirring at a speed of 300rpm / min for 5h. After cooling, transfer to a sealed container and store at room temperature.

[0032] 3) Preparation of epoxy resin system: Mix the resin part and curing agent part evenly at a weight ratio of 100:32.

[0033] 4) Curing: The mixed epoxy resin system was first cured at room temperature for 24 hours, and then cured at 70°C for 8 hours. The mechanical properties of the cured product are shown in Table 1.

Embodiment 2

[0035]

[0036]

[0037] Preparation:

[0038] 1) Add bisphenol A epoxy resin, the raw material of the resin, into the reaction kettle, raise the temperature to 70°C, and keep the temperature constant. Add glycidyl alcohol and stir well until uniform. Transfer the mixed resin into a sealed container and store at room temperature.

[0039]2) Add all the raw materials of the curing agent into the reaction kettle, raise the temperature to 90°C, keep the temperature constant, and continue stirring at a speed of 320rpm / min for 3h. After cooling, transfer to a sealed container and store at room temperature.

[0040] 3) Preparation of epoxy resin system: Mix the resin part and curing agent part evenly at a weight ratio of 100:30.

[0041] 4) Curing: The mixed epoxy resin system was first cured at room temperature for 24 hours, and then cured at 70°C for 8 hours. The mechanical properties of the cured product are shown in Table 1.

Embodiment 3

[0043]

[0044] Preparation:

[0045] 1) Add bisphenol A epoxy resin, the raw material of the resin, into the reaction kettle, raise the temperature to 65°C, and keep the temperature constant. Add hexanediol diglycidyl ether and stir well until uniform. Transfer the mixed resin into a sealed container and store at room temperature.

[0046] 2) Add all the raw materials of the curing agent into the reaction kettle, raise the temperature to 95°C, keep the temperature constant, and continue stirring at a speed of 360rpm / min for 2h. After cooling, transfer to a sealed container and store at room temperature.

[0047] 3) Preparation of epoxy resin system: Mix the resin part and curing agent part evenly at a weight ratio of 100:28.

[0048] 4) Curing: The mixed epoxy resin system was first cured at room temperature for 24 hours, and then cured at 70°C for 8 hours. The mechanical properties of the cured product are shown in Table 1.

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Abstract

The invention discloses an epoxy resin system for wind blade hand lay-up repair and a preparation method thereof. The epoxy resin system is formed by mixing of a resin part and a curing agent part that are prepared respectively and are in a weight ratio of 100:28-32. Specifically, the resin part is formed by mixing 85-95 parts by weight of one of or a mixture of bisphenol A epoxy resin and bisphenol F epoxy resin, and 5-15 parts by weight of a diluents; and the curing agent part is prepared by modification of, by weight, 40-70 parts of fatty amine, 0-30 parts of alicyclic amine, 0-10 parts of aromatic amine, 0-35 parts of an assistant, and 5-15 parts of an epoxy compound. The epoxy resin system for wind blade hand lay-up repair provided by the invention is accord with the medium viscosity requirement of hand lay-up molding, and has the characteristics of good sagging resistance, low operating environment requirement, and excellent fiber material infiltration. After curing, the product has excellent toughness, mechanical properties, heat resistance, water resistance and other comprehensive performance, and can meet the requirements of hand lay-up molding epoxy resin used for wind blade matched repair.

Description

technical field [0001] The invention relates to an epoxy resin system for hand lay-up repair of wind blades and a preparation method thereof. Background technique [0002] Wind energy, as a clean and renewable resource, solves the energy crisis in the world today and meets people's requirements for environmental protection. Therefore, wind power generation technology has attracted worldwide attention. The key moving part of the wind turbine is the fan blade, and the fan blade is made of composite materials, and its performance directly affects the power generation performance of the entire system. Therefore, the level of design and manufacturing quality of blades is very important and is regarded as a key technology in wind power generation systems. [0003] Most wind turbine blades made of traditional composite materials are manufactured by hand lay-up (Hand Lay-up). The product quality of fan blades produced by this method is highly dependent on the operating proficienc...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08G59/56
Inventor 张黎芳李穆林仁宗
Owner EPOXY BASE ELECTRONICS MATERIAL
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