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Halogen-free flame-retarding polystyrene composite material and preparation method thereof

A technology of polystyrene and composite materials, which is applied in the field of polystyrene composite flame-retardant materials, can solve the problems affecting the physical and mechanical properties and processing performance of the flame-retardant materials, and the large amount of addition, so as to achieve obvious charring effect and not easy Good ignition and thermal stability

Inactive Publication Date: 2012-06-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic flame retardants have flame retardant and smoke suppression effects at the same time, and do not produce toxic and corrosive gases when burned, but they are added in large amounts, so they seriously affect the physical and mechanical properties and processing properties of the flame retardant materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The first step is to prepare the raw materials

[0021] The raw materials for preparing the halogen-free flame-retardant polystyrene composite material were weighed according to the following parts by weight: 4.5 parts of polystyrene, 1.8 parts of polyphenylene ether, and 3.7 parts of expanded graphite;

[0022] Step two, drying

[0023] Drying the polyphenylene ether at 118°C for 5.5 hours, while drying the expanded graphite at 80°C for 4 hours;

[0024] The third step, high mix

[0025] Mix the expanded graphite and polyphenylene ether evenly with a high-speed mixer to obtain a powder mixture;

[0026] The fourth step, extrusion molding

[0027] The polystyrene is fed into the twin-screw extruder from the main feeding port and the powder mixture is fed into the twin-screw extruder from the side feeding port for melt extrusion molding. The extrusion parameters of the twin-screw extruder are: the screw speed is 300r / min, the barrel temperature is 228°C, the head te...

Embodiment 2

[0029] The first step is to prepare the raw materials

[0030] The raw materials for preparing the halogen-free flame-retardant polystyrene composite material were weighed according to the following parts by weight: 6.4 parts of polystyrene, 1.6 parts of polyphenylene ether, 2 parts of composite nitrogen-phosphorus flame retardant; in the composite nitrogen-phosphorus flame retardant, melamine, The weight ratio of pentaerythritol and ammonium polyphosphate is 4:8:4.5;

[0031] Step two, drying

[0032] Dry the polyphenylene ether at 120°C for 4 hours, and at the same time dry the composite nitrogen-phosphorus flame retardant at 83°C for 5.5 hours;

[0033] The third step, high mix

[0034] Use a high-speed mixer to mix the composite nitrogen-phosphorus flame retardant and polyphenylene ether evenly to obtain a powder mixture;

[0035] The fourth step, extrusion molding

[0036] The polystyrene is fed into the twin-screw extruder from the main feeding port and the powder mi...

Embodiment 3

[0038] The first step is to prepare the raw materials

[0039] The raw materials for preparing the halogen-free flame-retardant polystyrene composite material were weighed according to the following parts by weight: 5.2 parts of polystyrene, 1.3 parts of polyphenylene ether, 3.5 parts of composite nitrogen-phosphorus flame retardant; melamine, The weight ratio of pentaerythritol and ammonium polyphosphate is 4:8:7;

[0040] Step two, drying

[0041] Dry the polyphenylene ether at 132°C for 3.5 hours, and at the same time dry the composite nitrogen-phosphorus flame retardant at 90°C for 3 hours;

[0042] The third step, high mix

[0043] Use a high-speed mixer to mix the composite nitrogen-phosphorus flame retardant and polyphenylene ether evenly to obtain a powder mixture;

[0044] The fourth step, extrusion molding

[0045] The polystyrene is fed into the twin-screw extruder from the main feeding port and the powder mixture is fed into the twin-screw extruder from the sid...

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Abstract

The invention provides a halogen-free flame-retarding polystyrene composite material and a preparation method thereof, which belong to the technical field of polystyrene composite flame-retarding materials and aim at solving the technical problems and providing a smoke-free composite material formed by polystyrene and a halogen-free flame retardant and a method for preparing the smoke-free composite material. The technical scheme is that the halogen-free flame-retarding polystyrene composite material is formed by compositing, by weight, 4-7 parts of the polystyrene, 1-2 parts of polyphenyl ether and 2-4 parts of intumescent flame retardant. The preparation method of the composite material comprises the steps of 1 preparing raw materials, 2 drying, 3 high-mixing and 4 extruding and molding. The fire retardant treatment is performed to the polystyrene by means of the halogen-free flame retardant, the flame retardant is compatible with a base body well, produced flame-resistant polystyrene is not easily ignited, the char forming effect is obvious, smoke and melting-drop phenomenon are not caused, heat stability is good, and limiting oxygen index can reach to 30.2%.

Description

technical field [0001] The invention discloses a halogen-free flame-retardant polystyrene composite material and a preparation method thereof, belonging to the technical field of polystyrene composite flame-retardant materials. Background technique [0002] Flame retardants can be divided into inorganic flame retardants and organic flame retardants. Inorganic flame retardants have flame retardant and smoke suppression effects at the same time, and do not produce toxic and corrosive gases when burned, but they are added in large amounts, so they seriously affect the physical and mechanical properties and processing properties of the flame retardant materials. Among the organic flame retardants, the halogen-based flame retardants have good flame-retardant effects. During the combustion process, the halogen-containing flame retardants will produce a large amount of smoke and harmful gases such as hydrogen halide, which will have adverse effects on the human body and the environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L71/12C08K13/02C08K3/04C08K3/32C08K5/3492C08K5/053B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 晏泓张猛王慧芳董波魏丽乔许并社
Owner TAIYUAN UNIV OF TECH
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