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An expandable polystyrene/sio 2 Preparation Technology of Airgel Core-Shell Composite Particles

A technology of expandable polystyrene and composite particles, which is applied in the field of thermal insulation material preparation, can solve the problems of high thermal conductivity of thermal insulation boards, uneven distribution of cells, large cells, etc., and achieves the effect of accelerating the crystallization speed.

Inactive Publication Date: 2017-08-25
陕西得波材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the expandable polystyrene particles on the market only use styrene monomer as raw material and adopt the method of suspension polymerization. The foamed polystyrene particles produced have relatively large cells and uneven distribution of cells, resulting in The thermal conductivity of the insulation board is relatively large

Method used

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  • An expandable polystyrene/sio <sub>2</sub> Preparation Technology of Airgel Core-Shell Composite Particles
  • An expandable polystyrene/sio <sub>2</sub> Preparation Technology of Airgel Core-Shell Composite Particles
  • An expandable polystyrene/sio <sub>2</sub> Preparation Technology of Airgel Core-Shell Composite Particles

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Effect test

Embodiment 1

[0023] An expandable polystyrene / SiO 2 The preparation process of airgel core-shell composite particles comprises the following steps:

[0024] 1) Preparation of water phase solution, 400 parts of water, 3 parts of tricalcium phosphate, and 7 parts of polyvinyl alcohol solution are prepared into water phase solution, dispersed in a high-pressure reactor for 20 minutes and heated up, and the temperature is set at 60°C;

[0025] 2) Oil phase solution preparation, in 100 parts of styrene monomer, add benzoyl peroxide, tributyl phosphate and other auxiliary agents to mechanically disperse for 15 minutes, and pass the mixed solution into the outer tube of the core-shell droplet generator; Hydrophobically modified SiO 2 Two parts of the airgel are drawn out from the inner tube of the core-shell droplet generator;

[0026] 3) When the temperature in the reactor reaches 60°C, introduce the oil phase solution into the water phase solution through the core-shell droplet generator, set...

Embodiment 2

[0030] An expandable polystyrene / SiO 2 The preparation process of airgel core-shell composite particles comprises the following steps:

[0031] 1) Preparation of water phase solution, 400 parts of water, 6 parts of tricalcium phosphate, and 5 parts of polyvinyl alcohol solution are prepared into water phase solution, dispersed in a high-pressure reaction kettle for 20 minutes and heated up, and the temperature is set at 60°C;

[0032] 2) Oil phase solution preparation, in 100 parts of styrene monomer, add benzoyl peroxide, tributyl phosphate and other auxiliary agents to mechanically disperse for 15 minutes, and pass the mixed solution into the outer tube of the core-shell droplet generator; 5 parts of hydrophobically modified SiO2 airgel are drawn out from the inner tube of the core-shell droplet generator;

[0033] 3) When the temperature in the reactor reaches 60°C, introduce the oil phase solution into the water phase solution through the core-shell droplet generator, set...

Embodiment 3

[0037] An expandable polystyrene / SiO 2The preparation process of airgel core-shell composite particles comprises the following steps:

[0038] 1) Preparation of water phase solution, 400 parts of water, 5 parts of tricalcium phosphate, and 6 parts of polyvinyl alcohol solution are prepared into water phase solution, dispersed in a high-pressure reactor for 20 minutes and heated up, and the temperature is set at 60°C;

[0039] 2) Oil phase solution preparation, in 100 parts of styrene monomer, add benzoyl peroxide, tributyl phosphate and other auxiliary agents to mechanically disperse for 15 minutes, and pass the mixed solution into the outer tube of the core-shell droplet generator; Three parts of hydrophobically modified SiO2 airgel are drawn out from the inner tube of the core-shell droplet generator;

[0040] 3) When the temperature in the reactor reaches 60°C, introduce the oil phase solution into the water phase solution through the core-shell droplet generator, set the ...

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Abstract

A preparation process of expandable polystyrene / SiO2 airgel core-shell composite particles, first prepare the water phase solution; then prepare the oil phase solution; when the temperature in the reaction kettle reaches 60°C, the oil phase solution The shell droplet generator is introduced into the aqueous solution, and the temperature of the reactor is set at 90°C. By controlling the flow rate of styrene monomer in the core-shell droplet generator, the control of the core-shell ratio of the composite particles is realized. When the temperature of the reactor reaches After 90°C, start timing, add pentane after 2.5 hours, wait until the temperature reaches 100°C, keep it warm for 3 hours, cool down to 40°C and discharge. The invention designs the SiO2 airgel / polystyrene composite thermal insulation material to have the characteristics of small density, good mechanical properties, good flame retardancy and low thermal conductivity, etc., and prepares the thermal insulation performance of the polystyrene / SiO2 airgel composite thermal insulation board It is 65.4% higher than the current EPS board for building insulation.

Description

technical field [0001] The invention relates to the field of heat preservation material preparation, in particular to a preparation process of expandable polystyrene / SiO2 airgel core-shell composite particles. Background technique [0002] Most of the existing building exterior wall insulation boards are EPS boards. Since the thermal conductivity of EPS insulation boards is relatively large, in order to meet the requirements of thermal insulation performance, the thickness of EPS boards can only be thickened. At present, 50mm EPS boards are mostly used. Construction brings great risks, and also brings a lot of troubles for future construction. Expandable Polystyrene / SiO 2 The thermal conductivity of the composite board prepared by airgel core-shell composite particles is 60% lower than that of ordinary EPS boards, which means that the same thermal insulation effect can be achieved, and the thickness of the composite board only needs to be 20mm, which greatly reduces the con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/20C08F112/08C08F2/44C08K9/00C08K3/36
Inventor 耿刚强李凯刘新军杜莹陈安成
Owner 陕西得波材料科技有限公司
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