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Prepreg resin composition, prepreg resin system, fiber reinforced resin-based prepreg and preparation method and application thereof

A technology of fiber-reinforced resin and pre-impregnated resin, which is applied in the field of composite materials and can solve problems such as failure to popularize and apply, poor product stability, and environmental pollution

Active Publication Date: 2021-07-30
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method uses volatile solvents in the impregnation process, which will pollute the entire environment to a certain extent, and also affect the health of on-site production employees. In addition, wet prepregs often leave a certain amount of solvents. Pores are formed during the material forming process, which affects the stability of the later material properties
[0005] Therefore, the traditional prepreg production method has problems such as high energy consumption, easy pollution or poor performance of prepreg which affects the poor stability of subsequent products, which makes the Fiber-reinforced resin-based prepregs, especially high-end fiber-reinforced resin-based prepregs such as carbon fiber, cannot be widely applied in the industrial field

Method used

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  • Prepreg resin composition, prepreg resin system, fiber reinforced resin-based prepreg and preparation method and application thereof
  • Prepreg resin composition, prepreg resin system, fiber reinforced resin-based prepreg and preparation method and application thereof
  • Prepreg resin composition, prepreg resin system, fiber reinforced resin-based prepreg and preparation method and application thereof

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preparation example Construction

[0037] Some embodiments of the present invention also provide a method for preparing a fiber-reinforced resin-based prepreg, which includes: preparing a resin film from the above-mentioned prepreg resin system at 20-35°C and mixing it with the reinforcement while forming the film The fibers are impregnated.

[0038] By making the entire process of preparing fiber-reinforced resin-based prepregs be carried out at room temperature, it is convenient and simple, without heating, and greatly saves energy consumption. At the same time, various functions can be endowed to prepregs during the preparation process. Production provides a more cost-effective solution.

[0039] Specifically, the attached figure 1 , in some implementations of the present invention, the above-mentioned prepreg resin system is passed figure 1 The equipment is impregnated at room temperature, and then placed at 20-35°C for at least 1 day, preferably 1-2 days. figure 1 The basic operation process of the equi...

Embodiment 1

[0051] This embodiment provides a fiber-reinforced resin-based prepreg, the fiber-reinforced resin-based prepreg consists of two parts, one of which is HFW200T-A3-2 / 2-1000 (Jiangsu Hengshen Co., Ltd.) Carbon fiber fabric, which accounts for 58% of the total weight of the prepreg, and the other part is a liquid prepreg resin system, which accounts for 42% of the total weight of the prepreg. Among them, the prepreg resin system includes a resin matrix, a chain extender and a latent curing agent. The permanent curing agent is dicyandiamide (Air Chemicals, USA) and urea accelerator UR500 (Azken, Germany).

[0052] The amount of polyether amine used is 25% of the product of the epoxy value of the epoxy resin used and the active hydrogen equivalent, and the amount of dicyandiamide and urea accelerator is 4% of the total weight of the prepreg resin system used.

[0053] The preparation process of the fiber-reinforced resin-based prepreg specifically includes:

[0054] 1) The resin ...

Embodiment 2

[0076] This embodiment provides a fiber-reinforced resin-based prepreg, which consists of two parts, one of which is HFW200T-A3-2 / 2-1000 (Jiangsu Hengshen Co., Ltd.) specification The carbon fiber fabric accounts for 58% of the total weight of the prepreg, and the other part is the liquid prepreg resin system, which accounts for 42% of the total weight of the prepreg. Among them, the prepreg resin system includes a resin matrix, a chain extender and a latent curing agent. The resin matrix is ​​a low-viscosity vinyl modified epoxy resin Hetron 922 (Ashland, USA), and the chain extender is a modified alicyclic primary amine. The permanent dicyandiamide (Ningxia Hengkang), the latent curing agent is tert-butyl perbenzoate (Shandong Leon).

[0077] The amount of dicyandiamide modified by cycloaliphatic primary amine is 20% of the product of epoxy resin epoxy value and active hydrogen equivalent, and the amount of tert-butyl perbenzoate is 1% of the total weight of the prepreg resi...

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Abstract

The invention discloses a prepreg resin composition, a prepreg resin system, a fiber reinforced resin-based prepreg and a preparation method and application thereof. The prepreg resin composition comprises a component A and a component B. The component A is a resin matrix with the viscosity lower than 80000 cps and contains an epoxy group. The component B is a curing agent and comprises a chain extender and a latent curing agent, and the chain extender has a primary amino group. The specific resin matrix, the chain extender and the latent curing agent are used as the prepreg resin composition, a prepreg resin system is blended, the prepreg resin system obtained by mixing the three components can impregnate reinforcement fibers at normal temperature without containing a solvent, and after the impregnated fiber-reinforced resin-based prepreg is placed for a period of time, the viscosity is increased, the later plate manufacturing process requirement can be met, and the problems that energy consumption is large in existing dry-method impregnation, environment pollution exists in wet-method impregnation, the stability of subsequent products is poor due to poor prepreg performance and the like are solved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a prepreg resin composition, a prepreg resin system, a fiber-reinforced resin-based prepreg and a preparation method and application thereof. Background technique [0002] At present, there are two main methods for preparing fiber-reinforced resin-based prepregs, one is the hot melt impregnation method, and the other is the solvent impregnation method. [0003] Hot-melt impregnation method, commonly known as dry impregnation, its main steps are: generally at 60-80°C, adjust the viscosity of the high-viscosity resin system to coat the film, and then pass the coated resin film through the impregnation machine to complete the prepreg The preparation of the material is divided into two steps in the whole process. This process needs to consume a large amount of auxiliary materials, and the whole process of preparation requires complex steps such as heating and cooling. I...

Claims

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Application Information

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IPC IPC(8): C08J5/04C08J5/24C08L63/00C08K7/06C08G59/56C08G59/40
CPCC08J5/042C08J5/24C08G59/56C08G59/4021C08J2363/00C08K7/06Y02T50/40
Inventor 李志涛单瑞俊尹国强张坤李海萌李成功
Owner HENGSHEN
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