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Curable epoxy resin composition and fiber-reinforced composite material using same

A technology of resin composition and composite materials, which is applied in the field of matrix resin materials and can solve problems such as easy deformation

Pending Publication Date: 2020-05-08
NIPPON STEEL CHEM &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned composition, the glass transition temperature of the cured product is 110°C to 130°C, and when applied to the PCM method, if the molding temperature is 150°C, it will be easily deformed when it is released from the mold. Shortcomings

Method used

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  • Curable epoxy resin composition and fiber-reinforced composite material using same
  • Curable epoxy resin composition and fiber-reinforced composite material using same
  • Curable epoxy resin composition and fiber-reinforced composite material using same

Examples

Experimental program
Comparison scheme
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Embodiment

[0067] Next, the present invention will be specifically described based on examples, but the present invention is not limited to the following examples unless the gist is exceeded. Unless otherwise specified, the part showing the compounding quantity is a mass part. In addition, the unit of epoxy equivalent is g / eq.

[0068] The molecular weight measurement of the polymer component is carried out using GPC, and the molecular weight is calculated by using a calibration curve of a polystyrene standard substance. The measurement conditions are as follows.

[0069] Body: HLC-8320GPC made by Tosoh Co., Ltd.

[0070] String: TSKgel GMHXL×2+TSKgelG4000HXL manufactured by Tosoh Co., Ltd.

[0071] Column temperature: 40°C

[0072] Eluent: tetrahydrofuran

[0073] Flow rate: 1ml / min

[0074] Detector: RI (differential refractometer) detector

[0075] The content rate of each component in a phenol novolak type epoxy resin was measured using GPC, and the dinuclear body content rate...

preparation example 1

[0090] Preparation example 1 (main agent 1)

[0091] Put 167g of YD-128 and 1544g of YDPN-6300 into a four-necked separable glass flask equipped with a stirring device and a thermometer, and after heating to 150°C, put 172g of YD-019 and 114g of YP-70. After stirring at 150° C. for 1.5 hours and visually confirming that YD-019 and YD-70 were dissolved, the main ingredient 1 was obtained by filtering through a #100-mesh metal mesh.

preparation example 2～ preparation example 6

[0092] Preparation example 2~preparation example 6 (main agent 2~main agent 6)

[0093] The compounding amount of liquid epoxy resin (A), phenol novolac type epoxy resin (B), polymer component (C) is set as the value of Table 1, except that, prepare main Agent 2 to main agent 6.

[0094] In Table 1 and Table 2, the unit of the deployment amount is g.

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Abstract

Provided is a resin composition for fiber-reinforced composite materials, which forms a prepreg that has low tack properties and good handling properties, while achieving a good balance between fast curing properties and storage stability, and which is able to be suppressed in deformation when released from a mold in a PCM method. A resin composition for fiber-reinforced composite materials, whichis characterized by containing, as essential ingredients, (A) a liquid epoxy resin, (B) a novolac epoxy resin, (C) a polymer component having a molecular weight of 10,000 or more, (D) dicyandiamide and (E) an imidazole-based curing assistant. This resin composition for fiber-reinforced composite materials is also characterized in that: 10-35 parts by mass of the liquid epoxy resin (A) and 10-25 parts by mass of the polymer component (C) are contained in 100 parts by mass of the total of the components (A)-(E); and the glass transition temperature before curing is 0 DEG C or higher.

Description

technical field [0001] The present invention relates to a matrix resin material for a fiber reinforced composite material, which is a resin composition that hardens rapidly, has low viscosity, and is excellent in viscosity stability over a long period of time, is easy to handle because of its low viscosity when handled at room temperature, and is obtainable A molded product with high heat resistance and toughness when hardened. Background technique [0002] Fiber-reinforced composite materials include reinforcing fibers such as glass fiber, aramide fiber or carbon fiber and unsaturated polyester resin, vinyl ester resin, epoxy resin, phenol resin, benzoxazine resin, cyanate resin, bis Thermosetting matrix resins such as maleimide resins are used as structural materials for aircraft, automobiles, civil engineering, and sporting goods because of their light weight and excellent mechanical properties such as strength, corrosion resistance, and fatigue resistance. Widely applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08G59/20C08G59/40C08J5/24C08L71/10C08L101/00
CPCC08L101/00C08G59/4021C08G59/686C08L63/04C08G2650/50C08J5/243C08L63/00C08L71/00C08J5/04C08J2363/00C08K5/3155C08K5/3472C08K5/3492C08J5/24
Inventor 高尾康幸谷口裕一
Owner NIPPON STEEL CHEM &MATERIAL CO LTD