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Unsaturated polyester composite material and method for preparing same

A polyester composite material and unsaturated technology, applied in the field of unsaturated polyester composite material and its preparation, can solve the problems of large amount of aluminum hydroxide and continuous glass fiber mat, difficulty in realizing lightweight materials, etc.

Active Publication Date: 2018-12-28
广东航科新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned high-strength flame-retardant SMC insulation board, although the flame-retardant performance of the material can be realized by adding aluminum hydroxide, and the high strength of the material can be realized by adding continuous glass fiber mat, but the amount of aluminum hydroxide and continuous glass fiber mat is different. Large and difficult to reduce the weight of the material

Method used

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  • Unsaturated polyester composite material and method for preparing same
  • Unsaturated polyester composite material and method for preparing same

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preparation example Construction

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

[0026] S110, mixing the unsaturated polyester, release agent, initiator, flame retardant and foaming agent to obtain a premix.

[0027] Among them, 100 parts by mass of unsaturated polyester, 1-3 parts by mass of release agent, 20-40 parts by mass of flame retardant, 0.2-0.5 parts by mass of initiator, and 1-10 parts by mass of foaming agent.

[0028] Further, the release agent is at least one selected from zinc stearate, magnesium stearate and glycidyl lauryl ester.

[0029] Further, the flame retardant is a combination of aluminum hydroxide, phosphate flame retardant and graphene oxide.

[0030] Further, the mass ratio of aluminum hydroxide, phosphate flame retardant and graphene oxide in the flame retardant is 10-25:9-13.5:0.5-1.5.

[0031] In this embodiment, the phosphoric acid ester flame retardant is dimethyl methylphosphonate (DMMP). T...

Embodiment 1

[0052] Mix 100kg of unsaturated polyester, 2kg of zinc stearate, 0.2kg of tert-butyl peroxybenzoate, 9.5kg of DMMP, 0.5kg of graphene oxide, 10kg of aluminum hydroxide and 1kg of 2,2'-azobisisobutyronitrile , to obtain the premix.

[0053] The premixed material was added from the main feeding port of the single-screw extruder, 10 kg of carbon fiber was added from the side feeding port, and extruded from the die by the screw to obtain the blended material. Wherein, the extrusion temperature of the single-screw extruder is 40° C., and the residence time is 2 minutes; the temperature of the die head is 55° C., and the residence time is 1 minute.

[0054] The blended material is heated and cured in a high-temperature oven to obtain an unsaturated polyester composite material. Wherein the temperature of the high-temperature drying tunnel is 95° C., and the residence time is 9 minutes.

Embodiment 2

[0056] Mix 100kg of unsaturated polyester, 2kg of zinc stearate, 0.5kg of tert-butyl peroxybenzoate, 13.5kg of DMMP, 1.5kg of graphene oxide, 25kg of aluminum hydroxide and 10kg of 2,2'-azobisisobutyronitrile , to obtain the premix.

[0057] The premixed material was added from the main feeding port of the single-screw extruder, and 40kg of glass fiber was added from the side feeding port, and extruded from the die by the screw to obtain the blended material. Wherein, the extrusion temperature of the single-screw extruder is 50° C., and the residence time is 4 minutes; the temperature of the die head is 65° C., and the residence time is 2 minutes.

[0058] The blended material is heated and cured in a high-temperature oven to obtain an unsaturated polyester composite material. Wherein the temperature of the high-temperature drying tunnel is 105° C., and the residence time is 11 minutes.

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Abstract

The invention relates to a method for preparing an unsaturated polyester composite material. The method comprises the steps of mixing unsaturated polyester, a mold release agent, an initiator, a flameretardant and a foaming agent to obtain a premix; feeding the premix from a main feeding port of a single-screw extruder, adding a filler fiber from a side feeding port, and extruding the materials from a die head through a screw to obtain a blend; and heating and solidifying the blend through a high temperature drying tunnel, so that the lightweight, high-strength and flame-retardant polyester composite material can be prepared.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an unsaturated polyester composite material and a preparation method thereof. Background technique [0002] Unsaturated polyester sheet molding compound (SMC) is a thermosetting material that is formed by mixing a series of additives such as unsaturated polyester resin and filler fiber, and then covering the film with stretching, rolling, and winding. Composite materials have the characteristics of high mechanical strength, simple processing methods, and diversified product forms, and are widely used in the fields of automobiles, railways, electrical insulation, and civil buildings. [0003] With the continuous improvement of energy saving, environmental protection, flame retardant and lightweight requirements in the field of rail transit and new energy vehicles, people have put forward higher requirements for the light weight, high strength, flame retardant and firepro...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08K13/02C08K5/098C08K5/14C08K3/04C08K3/22C08J9/10
CPCC08J9/0023C08J9/0066C08J9/0095C08J9/102C08J2203/04C08J2367/06
Inventor 杨金杨克俭刘霖
Owner 广东航科新材料有限公司
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