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Flow controllable epoxy resin prepreg and preparation method thereof

A technology of epoxy resin and epoxy resin system, which is applied in the field of composite materials, can solve the problems of low molding efficiency and large quality fluctuation of composite material parts, and achieve enhanced compatibility, good commercial application prospects, and reduced manufacturing costs Effect

Inactive Publication Date: 2014-11-26
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to provide a flow-controllable epoxy resin prepreg system that can realize the control mode of pressurization and zero glue absorption process in the autoclave molding project, and solve the problem of pressure point control The problems of large quality fluctuation and low molding efficiency of composite parts caused by the glue suction process

Method used

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  • Flow controllable epoxy resin prepreg and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: A flow controllable epoxy resin prepreg is composed of F-46 epoxy resin, CYD-011 epoxy resin, carboxyl-terminated nitrile rubber, DYD-128 epoxy resin and curing agent dicyandiamide The flow controllable epoxy resin system is impregnated with reinforcing materials. The preparation steps are as follows: (1) Stir F-46 epoxy resin and CYD-011 epoxy resin at 50-100°C and 200-1000r / min for 0.5-1h and mix uniformly. The content is 25%, and the content of CYD-011 epoxy resin is 15%; (2) The carboxyl-terminated nitrile rubber and CYD-011 epoxy resin are heated at 100-150℃ and 200- under the action of the catalyst triphenylphosphine. Stirring and pre-polymerizing at 1000r / min for 1-3h to prepare rheology control components; wherein the content of CYD-011 epoxy resin is 30%, the content of carboxy-terminated nitrile rubber is 8%, and the content of triphenylphosphine The content is 0.1%; (3) Put DYD-128 epoxy resin into a dry stirring tank and stir for 0.5-2h at 40-50℃ ...

Embodiment 2

[0044] Example 2: A flow controllable epoxy resin prepreg is a flow controllable composition composed of 638s epoxy resin, 830 epoxy resin, polyethersulfone, DYD-128 epoxy resin and curing agent diaminodiphenylmethane Epoxy resin system is impregnated with reinforcing materials. The preparation steps are as follows: (1) Stir 638s epoxy resin and 830 epoxy resin at 50-100°C and 200-1000r / min for 0.5-1h and mix uniformly. The content of 638s epoxy resin is 15%, 830 The content of epoxy resin is 10%; (2) Polyethersulfone and 830 epoxy resin are pre-polymerized at 100-150℃ and 200-1000r / min for 1-3h to prepare rheology control components; The content of 830 epoxy resin is 30%, and the content of thermoplastic resin is 25%; (3) Put the DYD-128 epoxy resin into a dry stirred tank and stir at 40-50℃ and 200-1000r / min. 0.5-2h to obtain low-viscosity DYD-128 epoxy resin, add diaminodiphenylmethane curing agent and stir for 0.5-1h at a speed of 200-1000r / min, then grind 1-5 times on a t...

Embodiment 3

[0048] Example 3: A flow controllable epoxy resin prepreg is made of EX-40 epoxy resin, F-46 epoxy resin, 830 epoxy resin, random carboxyl nitrile rubber, Sb 2 O 3 A flow controllable epoxy resin system composed of particles, dicyandiamide and diuron is impregnated with reinforcing materials. The preparation steps are: (1) Put the EX-40 epoxy resin in a dry container, and stir at a rate of 200-1000r / min for 0.1-3h at 50-100°C to obtain a low-viscosity EX-40 epoxy resin ; Among them, the content of EX-40 epoxy resin is 20%; (2) Prepolymerize F-46 epoxy resin and random carboxyl nitrile butadiene rubber at 100-150℃, 200-1000r / min rotating speed stirring 1- 3h, the rheology control component A is obtained; the content of F-46 epoxy resin is 25%, and the content of random carboxyl nitrile rubber is 10%; (3) Sb 2 O 3 The particles and 830 epoxy resin are stirred at 50-100℃, 200-1000r / min for 0.5-1h and mixed uniformly, and then ground on a three-roll mill for 1-5 times to obtain rheo...

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Abstract

A flow controllable epoxy resin prepreg and a preparation method thereof are disclosed. The preparation method comprises the following steps: individually preparing an epoxy resin component, a flow control component, and a curing component, adding the epoxy resin component and the curing component into the flow control component to prepare a flow controllable epoxy resin system with a viscosity more than 4 Pa.s, and finally compounding the system with an enhancing material so as to obtain the flow controllable expoxy resin prepreg; wherein the epoxy resin component can be single epoxy resin or a composition of multiple epoxy resins and accounts for 10 to 90% of the total weight of the system; the flow control component is a prepolymer or mixer of an epoxy resin modifier and epoxy resin and accounts for 5 to 60% of the total weight of the system, and the curing component is composed a single curing agent or a mixture of multiple curing agents or curing agents and promoters, and accounts for 2 to 30% of the total weight of the system. Through the provided flow controllable epoxy resin prepreg, the control modes of feeding pressurization and zero rubber absorption in the autoclave moulding engineering can be achieved, and thus the product quality is improved.

Description

Technical field [0001] The invention relates to a flow controllable epoxy resin prepreg and a preparation method thereof, and belongs to the technical field of composite materials. Background technique [0002] The autoclave molding process is one of the commonly used manufacturing processes for aerospace high-performance resin-based composite structural parts. It is used to manufacture resin-based composite structural parts with complex structures and large overall dimensions. [0003] When the traditional resin system adopts the autoclave molding process to prepare the resin-based composite material, it is necessary to determine the heating rate, heat preservation step, pressure point and glue absorption process during the molding process according to the rheological properties of the resin. The setting of the pressure point and the glue suction process in the composite molding process needs to be changed according to the size, thickness and mold structure of the composite part, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L77/10C08L23/06C08K7/06C08K3/04C08K7/14C08K7/10C08J5/04
Inventor 白雪莲王磊韩成智凌辉张艺萌尚呈元张东霞臧千阙伟婧
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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