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High-strength flame-retardant insulation board and preparation method thereof

A flame-retardant heat preservation and high-strength technology, which is applied in the field of high-strength flame-retardant heat insulation board and its preparation, can solve the problems of impact resistance of polystyrene, performance of graphite polystyrene board, threat to life and property safety, etc., to achieve Not easy to agglomerate, improve strength and impact resistance, increase compatibility

Pending Publication Date: 2021-12-03
山东乾星节能建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of graphite with high melting point, the overall impact resistance of polystyrene is affected. At the same time, graphite powder is prone to agglomeration in polystyrene, and it is difficult to achieve uniform dispersion. The performance of benzene board has a great influence
Although polystyrene has many excellent properties and is widely used in production and life, polystyrene is easy to burn, and a large amount of molten droplets will be produced when burning, accompanied by a large amount of black smoke, which poses a threat to people's lives and property safety. Huge threat, which has affected the application of polystyrene to some extent

Method used

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  • High-strength flame-retardant insulation board and preparation method thereof
  • High-strength flame-retardant insulation board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of modified expanded graphite

[0037] 100kg of expanded graphite with a particle size of 300-500 mesh was dispersed in absolute ethanol by ultrasonic, 4kg of titanate was added, heated to 50°C and ultrasonically impregnated for 3h, the ultrasonic frequency was 60kHz. Take out the expanded graphite and dry it in an oven at 85° C. to obtain modified expanded graphite.

Embodiment 2

[0039] Preparation of Modified Silica Airgel Particles

[0040] By spraying, once every 5 minutes, 2.5kg of isobutyltriethoxysilane was added to 100kg of silica airgel particles with a particle size of 0.5-1mm, and mixed for 1 hour at room temperature to obtain modified silica Silica airgel particles.

Embodiment 3

[0042] (1) Put 82.5kg of polystyrene, 5kg of chlorinated polyethylene, 1.0kg of polycaprolactone and 0.25kg of calcium stearate into a two-roller mill for blending, the temperature of the rollers is 180°C, and the milling is carried out for 20 minutes , to obtain a blend.

[0043] (2) The blend is mixed with 10kg modified expanded graphite, 2.5kg microencapsulated red phosphorus, 2kg modified silica airgel, 1.0kg polycaprolactone and 0.25kg calcium stearate to obtain a mixture .

[0044] (3) Send the mixture into the twin-screw extruder. The temperature of the first zone of the twin-screw extruder is 230°C, the temperature of the second zone is 235°C, the temperature of the third zone is 237°C, the temperature of the fourth zone is 240°C, and the temperature of the fifth zone The temperature is 245°C, the rotation speed of the main engine is 500rpm; the pore size of the filter is 50μm. After being extruded, it is cooled by the strands and pelletized to obtain graphite polyst...

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Abstract

The invention discloses a high-strength flame-retardant insulation board, which is prepared from the following raw materials in parts by weight: 80 to 85 parts of polystyrene, 3 to 7 parts of chlorinated polyethylene, 2 to 3 parts of compatilizer, 8 to 12 parts of modified expanded graphite, 2 to 3 parts of microencapsulated red phosphorus, 1 to 3 parts of modified silicon dioxide aerogel and 5 to 10 parts of foaming agent. The preparation method comprises the following steps: pre-mixing and melt-mixing the raw materials, conducting pressurizing and extruding, conducting bracing and cooling, and conducting dicing to obtain graphite polystyrene board particles; and conducting mixing with a foaming agent, adding a formed mixture into a plastic extruding machine for extrusion molding, and conducting aging and curing to obtain the high-strength flame-retardant insulation board. The insulation board prepared by the invention has excellent impact resistance and flame retardance and good waterproofness; and the method is simple, raw materials are easy to obtain, and the insulation board is low in cost.

Description

technical field [0001] The invention relates to the technical field of thermal insulation boards, in particular to a high-strength flame-retardant thermal insulation board and a preparation method thereof. Background technique [0002] At present, the insulation materials used for external wall insulation are mainly divided into two categories: inorganic insulation materials and organic insulation materials, but these materials generally have the disadvantage of not being able to balance energy saving and fire prevention. Organic materials have poor heat resistance and are easy to burn. When burning, they release a lot of heat and produce a lot of toxic smoke, which will not only accelerate the spread of the fire, but also easily cause casualties to trapped people and rescuers. Once it encounters a fire, it will burn rapidly, and it is very easy to cause dripping, accelerating or spreading. Inorganic materials have a low tensile strength that causes the insulation layer to ...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L23/28C08L67/04C08K9/04C08K7/24C08K9/10C08K3/02C08K9/06C08K7/26C08K5/098C08J9/14C08J5/18
CPCC08J9/141C08J9/0061C08J9/009C08J9/0023C08J9/0095C08J5/18C08J2325/06C08J2423/28C08J2467/04C08J2203/14Y02B80/10
Inventor 张鸿
Owner 山东乾星节能建材有限公司
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