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Epoxy resin composition as well as preparation method and application thereof

A technology of epoxy resin and composition, which is applied in the field of epoxy resin composition and its preparation, can solve the problems of high price of carbon fiber, etc., and achieve the effects of great economic value and market prospect, long toughness and high reaction speed

Active Publication Date: 2021-05-11
WELLS ADVANCED MATERIALS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main beam of traditional wind power blades is made of glass fiber and resin and solidified by infusion process. Vestas found that the use of pultruded carbon fiber slats as the main beam of the blade can greatly reduce the weight of the blade, and the strength and Higher modulus, but carbon fiber is expensive

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  • Epoxy resin composition as well as preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] The preparation process of epoxy resin composition of the present invention is as follows:

[0030] (1) Weigh 5 parts of toughening agent, 2 parts of release agent, 0.5 part of defoamer, 1 part of coupling agent, 2 parts of accelerator according to the parts by weight of each component in the additive (C), and stir for 20 minutes, Stand still for 30min, set aside;

[0031] (2) According to epoxy resin (A): acid anhydride curing agent (B): additive (C)=100: (80-100): (1-43) take by weighing 100 parts of South Asia E51 resins, join in the reactor, Control the temperature at 65°C, weigh 85 parts of tetrahydromethylphthalic anhydride and the additive (C) prepared in step 1, add them to the reaction kettle in turn, and keep stirring evenly to obtain an epoxy resin composition, which is named HB-1.

[0032] The epoxy resin composition prepared in this example had a gel time of 54s at 150°C, a reaction exothermic peak temperature of 140°C, an elongation at break of 5.6% at 25...

Embodiment 2

[0034] The preparation process of epoxy resin of the present invention is as follows:

[0035] (1) Weigh 5 parts of toughening agent, 2 parts of release agent, 0.5 part of defoamer, 1 part of coupling agent, 2 parts of accelerator according to the parts by weight of each component in the additive (C), and stir for 20 minutes, Stand still for 30min, set aside;

[0036] (2) According to epoxy resin (A): acid anhydride curing agent (B): additive (C)=100: (80-100): (1-43) take by weighing 100 parts of South Asia E51 resins, join in the reactor, Control the temperature at 65°C, weigh 90 parts of tetrahydromethylphthalic anhydride and the additive (C) prepared in step 1, add them to the reaction kettle in turn, and keep stirring evenly to obtain an epoxy resin composition, which is named HB-2.

[0037] The epoxy resin composition prepared in this example had a gel time of 50 s at 150°C, a reaction exothermic peak temperature of 138°C, an elongation at break of 5.8% at 25°C, and a v...

Embodiment 3

[0039] The preparation process of epoxy resin of the present invention is as follows:

[0040] (1) Weigh 10 parts of toughening agent, 2 parts of release agent, 0.5 part of defoamer, 1 part of coupling agent, 2 parts of accelerator according to the parts by weight of each component in the additive (C), and stir for 20 minutes, Stand still for 30min, set aside;

[0041] (2) According to epoxy resin (A): acid anhydride curing agent (B): additive (C)=100: (80-100): (1-43) take by weighing 100 parts of South Asia E51 resins, join in the reactor, Control the temperature at 65°C, weigh 85 parts of tetrahydromethylphthalic anhydride and the additive (C) prepared in step 1, add them to the reaction kettle in sequence, and keep stirring evenly to obtain an epoxy resin composition, which is named HB-3.

[0042] The epoxy resin composition prepared in this example had a gel time of 58s at 150°C, a reaction exothermic peak temperature of 141°C, an elongation at break of 6.2% at 25°C, and...

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Abstract

The invention discloses an epoxy resin composition as well as a preparation method and application thereof. The epoxy resin composition consists of epoxy resin (A), an anhydride curing agent (B) and an additive (C), wherein the additive (C) is one or more of a flexibilizer, a release agent, a coupling agent, a defoaming agent and an accelerant. According to the epoxy resin composition disclosed by the invention, the components and the dosage are reasonably matched, so that the epoxy resin composition has relatively high reaction speed, relatively long operation time and toughness, and is suitable for a pultrusion process; and the epoxy resin composition and reinforcement fibers are compounded to prepare a composite material with excellent performance, and the composite material is further used for preparing a wind power blade girder and has great economic value and market prospect in the field of wind power.

Description

technical field [0001] The invention relates to the field of epoxy resin and its curing agent, in particular to an epoxy resin composition and its preparation method and application. Background technique [0002] Wind power generation is a hot spot that everyone has paid more attention to in recent years, and the main material of wind power generation is wind power blades. At present, for the wind power industry, manufacturing lightweight, high-strength and high-modulus large-size blades is still one of the main concerns of wind turbine manufacturers. one. The main beam of traditional wind power blades is made of glass fiber and resin and solidified by infusion process. Vestas found that the use of pultruded carbon fiber slats as the main beam of the blade can greatly reduce the weight of the blade, and the strength and The modulus is higher, but carbon fiber is expensive. [0003] Through the research on the pultruded fiberglass slats, it is found that the strength and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K7/14C08J5/04C08G59/42
CPCC08J5/043C08J5/042C08J5/047C08G59/4223C08J2363/02C08K7/14Y02E10/72
Inventor 刘洋金威吴悠
Owner WELLS ADVANCED MATERIALS SHANGHAI
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