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Epoxy resin composite material and preparation method thereof

An epoxy resin and composite material technology, applied in the field of polymer materials, can solve the problems of reduced mechanical strength, reduced strength and toughness, and high brittleness of sheet molding compounds.

Active Publication Date: 2021-01-08
广东航科新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous improvement of people's requirements for energy saving, environmental protection, flame retardancy and lightweight, higher requirements are also put forward for the lightweight of SMC. Although the further increase of the content of hollow glass microspheres will further reduce the material density, it will lead to The mechanical strength of SMC sheet molding compound decreases rapidly
[0004] For traditional structural foam, although its density is very low (150kg / m 3 ~200kg / m 3 ), can achieve further weight reduction, but there are disadvantages such as low strength (compressive strength <2MPa), high brittleness, etc., and if it is necessary to meet the requirements of flame retardancy at the same time, its strength and toughness will be further greatly reduced, and it is difficult to meet the requirements for use. Require

Method used

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  • Epoxy resin composite material and preparation method thereof
  • Epoxy resin composite material and preparation method thereof

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preparation example Construction

[0025] A method for preparing an epoxy resin composite material in an embodiment includes the following steps S110-S130:

[0026] S110, mixing the epoxy resin, the toughening modifier, the surfactant, the foaming agent and the flame retardant to obtain a premix.

[0027] Among them, 100 parts by mass of epoxy resin, 10-30 parts by mass of toughening modifier, 3-5 parts by mass of surfactant, 1-10 parts by mass of foaming agent, and 20-40 parts by mass of flame retardant share.

[0028] Further, the toughening modifier is selected from at least one of polyether polyurethane resin, polyester polyurethane resin and acrylic resin.

[0029] Wherein, the polyether polyurethane resin is tetrahydrofuran polyether polyurethane (molecular weight: 1000).

[0030] Further, the surfactant is a polyethylene glycol type surfactant.

[0031] Further, the blowing agent is at least one selected from azodicarbonamide, 2,2'-azobisisobutyronitrile, diethyl azodicarboxylate, azoaniline and benze...

Embodiment 1

[0055] Mix 100kg epoxy resin E51, 10kg acrylic resin, 4kg polyethylene glycol, 1kg 2,2'-azobisisobutyronitrile, 8kg DOPO, 2kg hydroxyl-terminated polysiloxane and 10kg aluminum hydroxide to obtain a premix .

[0056] The premixed material was added from the main feeding port of the single-screw extruder, 10 kg of glass fiber and 20 kg of polyetheramine D400 were added from the side feeding port, and extruded from the die by a screw to obtain a blended material. Wherein, the extrusion temperature of the single-screw extruder is 40° C., and the residence time is 4 minutes; the die head temperature is 55° C., and the residence time is 2 minutes.

[0057] The blended material is heated and cured in a high-temperature oven to obtain an epoxy resin composite material. Among them, the high-temperature drying tunnel is a two-stage heating tunnel with hot air circulation. The temperature of the front drying tunnel is 75°C, and the residence time is 19 minutes; the temperature of the r...

Embodiment 2

[0059] 100kg epoxy resin E51, 30kg tetrahydrofuran polyether polyurethane (molecular weight 1000), 4kg polyethylene glycol, 10kg 2,2'-azobisisobutyronitrile, 7kg PEPA, 3kg hydroxyl-terminated polysiloxane and 30kg hydrogen Alumina is mixed to obtain a premix.

[0060] The premixed material was added from the main feeding port of the single-screw extruder, 40kg of glass fiber and 50kg of polyamide 650 were added from the side feeding port, and extruded from the die by a screw to obtain a blended material. Wherein, the extrusion temperature of the single-screw extruder is 50° C., and the residence time is 5 minutes; the die head temperature is 60° C., and the residence time is 3 minutes.

[0061] The blended material is heated and cured in a high-temperature oven to obtain an epoxy resin composite material. Among them, the high-temperature drying tunnel is a hot air circulation two-stage heating drying tunnel. The temperature of the front drying tunnel is 80°C, and the residenc...

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Abstract

The invention provides a preparation method for an epoxy resin composite material. The preparation method comprises the following steps: mixing epoxy resin, a toughening modifier, a surfactant, a foaming agent and a flame retardant to obtain premix; adding the premix from a main feeding hole of a single screw extruder, adding filling fibers and a curing agent from a side feeding hole, extruding from a mould head through a screw to obtain blended materials; and heating and curing the blended materials through a high-temperature drying oven to obtain the high-strength, high-toughness, flame-resistant and light epoxy resin composite material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an epoxy resin composite material and a preparation method thereof. Background technique [0002] As rail transit, new energy vehicles, military ships and other fields have higher and higher requirements for lightweight, environmental protection, low smoke toxicity, and halogen-free flame retardant, people's demand for new lightweight, high-strength, flame-retardant and fire-resistant materials is also increasing . Among them, sheet molding compound (SMC) is the most widely used lightweight composite material at present. Its processing method is simple, the product form is diversified, and the density can be as low as 2.0g / cm 3 , Compared with traditional steel and aluminum profiles, it has obvious advantages in weight reduction. [0003] The current lightweight technology of SMC is mainly realized by adding hollow glass microspheres. "Plastic Industry" 2007, Volume ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L75/08C08L33/00C08L83/04C08K7/14C08K7/06C08K5/521C08K5/5313C08K5/5333C08K3/22C08J9/10
CPCC08J9/0038C08J9/0061C08J9/0066C08J9/0085C08J9/0095C08J9/102C08J2363/00C08J2433/00C08J2475/08C08J2483/04C08K5/521C08K5/5313C08K5/5333C08K7/06C08K7/14C08K2003/2227
Inventor 杨克俭杨金刘霖
Owner 广东航科新材料有限公司
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