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High-thermal-resistance expandable polystyrene (EPS) composition particles and preparation method thereof

A technology of expandable polystyrene and polystyrene, which is applied in the field of flame-retardant expandable polystyrene composition particles, can solve the problems of reducing cell quality, easy shrinkage deformation, and lack of elasticity, etc. Good mechanical properties, saving process cost, raw material handling and simple manufacturing process

Inactive Publication Date: 2015-05-06
TIANJIN SITANLI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the price of carbon black is cheap, the channel method and furnace method carbon black in the prior art directly produce very fine particles of nanometer scale. 100 microns) infrared rays, according to the principles of Rayleigh scattering and Mi scattering, this type of nano-carbon black particles have very weak absorption of this kind of longer-wavelength infrared rays, and only by increasing the amount of addition to 10% can there be obvious absorption. The addition of inorganic additives will significantly reduce the quality of the cells after EPS molding, without elasticity, and easy to shrink and deform

Method used

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  • High-thermal-resistance expandable polystyrene (EPS) composition particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Put the oxidized asphalt, which is a by-product of coal chemical industry or petrochemical industry, into a tube furnace after pulverization, heat up to 250-350°C in an air atmosphere, and solidify it, then put the cured asphalt powder into a carbonization furnace, Under the atmosphere, the temperature is raised to 700-1300° C. for carbonization treatment to obtain pitch hard carbon particles. The pitch hard carbon particles are screened and decomposed, and the hard carbon particles of 5-10 microns are selected as infrared absorbers.

[0056] The general-purpose polystyrene GPPS (Mw=220000g / mol), the pentane blowing agent of 6 mass % content, the hexabromocyclododecane of 1.5 mass % content, the average particle diameter obtained by the above-mentioned sintering of 5 mass % is about 5~ 10 micron bituminous hard carbon particles.

[0057] At 200°C, continue to mix evenly in an extruder or static mixer, and the mixing time is controlled at 10 minutes;

[0058] Cool to 18...

Embodiment 2

[0064] As in Example 1, pitch hard carbon particles were prepared, and particles with an average particle size of 5-10 microns were selected as infrared absorbers.

[0065] General-purpose polystyrene GPPS (Mw=180000g / mol), the pentane blowing agent of 5 mass % content, the brominated styrene-butadiene-styrene block copolymer of 2.5 mass % content, 5 mass % above-mentioned 5-10 micron pitch hard carbon particles obtained by sintering. In an extruder at a temperature of 200°C, fully mix evenly, cool to 180-205°C, and then granulate into expandable black polystyrene composition particles with an average particle diameter of 1.0mm. The pre-foaming and molding boards were carried out as in Example 1, and the flame retardancy and thermal conductivity were tested.

[0066] The black expandable polystyrene composition particles containing pitch hard carbon particles have a flame retardant grade of B1 after foaming and a thermal conductivity of 30 mW / (m·K). The foamed sheet has fine...

Embodiment 3

[0068] As in Example 1, pitch hard carbon particles with an average particle size of 5-10 microns were prepared.

[0069] General-purpose polystyrene GPPS (Mw=280000g / mol), the pentane blowing agent of 6 mass % content, the brominated styrene-butadiene-styrene block copolymer of 1.5 mass % content, 5 mass % above-mentioned The bituminous hard carbon particle that sintering obtains, the hollow glass microsphere of the average particle diameter of 0.5 mass % content 30 microns, the polyphenylene ether (PPO) of 15 mass % content, 0.1 mass % commercially available antioxidant B225 (hindered phenol 1010 and phosphite 168 mixture). In a static mixer at a temperature of 220°C, fully mix evenly, cool to 180-215°C, and then granulate into black expandable polystyrene composition particles with an average particle diameter of 1.0 mm.

[0070] The expandable polystyrene composition particles are used in conventional pre-foaming and molding machine-made boards. Compared with traditional ...

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Abstract

The invention relates to flame-retardant high-thermal-resistance expandable polystyrene (EPS) composition particles with excellent heat-insulating property and a preparation method of the composition particles. Specifically, the expandable polystyrene composition particles disclosed by the invention contain ingredients, such as polystyrene, hard carbon particles, a physical foamer and an optional flame retardant. The preparation method of the expandable polystyrene composition particles comprises the steps of thoroughly mixing all the ingredients in an extruder or static mixer, then, cooling and granulating. The expandable polystyrene composition particles with high thermal resistance and high flame retardance, disclosed by the invention, are prepared from materials, such as coal- or petroleum-based oxidized asphalt, plant fibers and polymer base material resin, by a simple process.

Description

technical field [0001] The invention relates to a flame-retardant expandable polystyrene composition particle (EPS) with excellent thermal insulation performance, and a preparation method thereof. Background technique [0002] Expandable polystyrene particles (EPS) are polystyrene particles containing a physical foaming agent. After the polymer particles are heated, pre-expanded and cured, they are heated and formed into the desired polystyrene foam in a mold. , The expansion ratio of the foam can reach 20 to 80 times, and it has the structural characteristics of fine closed cells. [0003] The foam board made of expandable polystyrene particles (EPS) has been widely used in insulation fields such as construction, cold storage, and refrigerated vehicles due to its excellent and durable thermal insulation properties. The external insulation layer of the external wall made of polystyrene foam plastic board can realize building energy saving, improve the thermal environment qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L23/06C08L53/02C08K13/04C08K3/04C08K5/02C08K5/03C08K5/06C08K3/02C08K3/22C08K7/28C08K7/18C08J9/14
Inventor 周良陈志强
Owner TIANJIN SITANLI NEW MATERIAL
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