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Preparation of polystyrene/expanded graphite composite foaming material

A technology of composite materials and expanded graphite, which is applied in the fields of organic/inorganic composite materials, polymer chemistry and thermal insulation materials, and polymer physics. It can solve the problems of rare, high-performance and functional thermal insulation foam materials.

Inactive Publication Date: 2010-11-24
SHANGHAI BOTAO ENVIRONMENT PROTECTION SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The excellent properties of polymer-inorganic composite materials have been reported in the literature. At present, most of the inorganic powder additives of polymer composite materials are added during the molding process of polymers. In the process of monomer polymerization, inorganic powder materials are directly added. There are not many studies, and it is rare to add inorganic powder materials to prepare high-performance and functional thermal insulation foam materials in the process of styrene suspension polymerization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Styrene 100g, 500 mesh expanded graphite 5g, nano aluminum hydroxide 4g, coupling agent 0.4g, dibenzoyl peroxide 0.1g, dicumyl peroxide 0.3g, polyvinyl alcohol 0.3g, tricalcium phosphate 1g , white oil 0.5g, polyethylene wax 0.3g, stearic acid 0.2g, pentane 9g.

[0024] The method for preparing the above-mentioned flame-retardant expandable polystyrene particles comprises the following steps:

[0025] (1) Add 0.5g white oil, 0.3g polyethylene wax, 5g500 order expanded graphite and 4g nanometer aluminum hydroxide, 0.4g coupling agent in the styrene monomer of 100g, stir until uniform;

[0026] (2) Afterwards, add 0.1g dibenzoyl peroxide and 0.3g dicumyl peroxide initiator, after uniform stirring, be warming up to 85 ℃ and carry out prepolymerization, obtain styrene / expanded graphite prepolymer, stand-by ;

[0027] (3) add the deionized water of 110g in reactor;

[0028] (4) While stirring evenly, add 0.3g polyvinyl alcohol and 1g calcium triphosphate in turn, and cont...

Embodiment 2

[0034] Styrene 100g, 200 mesh expanded graphite 10g, nano aluminum hydroxide 5g, coupling agent 0.4g, dibenzoyl peroxide 0.3g, dicumyl peroxide 0.1g, polyvinyl alcohol 0.1g, tricalcium phosphate 2g , white oil 0.4g, polyethylene wax 0.4g, stearic acid 0.2g, pentane 10g

[0035] The method for preparing the above-mentioned flame-retardant expandable polystyrene particles comprises the following steps:

[0036] (1) Add 0.4g white oil, 0.4g polyethylene wax, 10g200 mesh expanded graphite and 5g nanometer aluminum hydroxide, 0.4g coupling agent in 100g of styrene monomer, stir until uniform;

[0037] (2) Afterwards, add 0.3g dibenzoyl peroxide and 0.1g dicumyl peroxide initiator, after uniform stirring, be warming up to 85 ℃ and carry out prepolymerization, obtain styrene / expanded graphite prepolymer, stand-by ;

[0038] (3) add the deionized water of 110g in reactor;

[0039] (4) While stirring evenly, add 0.1g polyvinyl alcohol and 2g calcium triphosphate successively, and co...

Embodiment 3

[0045] Styrene 100g, 200 mesh expanded graphite 10g, nano aluminum hydroxide 6g, coupling agent 0.5g, dibenzoyl peroxide 0.2g, dicumyl peroxide 0.2g, polyvinyl alcohol 0.5g, tricalcium phosphate 1.5 g, white oil 0.3g, polyethylene wax 0.5g, stearic acid 0.2g, pentane 11g

[0046] The method for preparing the above-mentioned flame-retardant expandable polystyrene particles comprises the following steps:

[0047] (1) Add 0.3g white oil, 0.5g polyethylene wax, 10g200 mesh expanded graphite and 6g nanometer aluminum hydroxide, 0.4g coupling agent in 100g styrene monomer, stir until uniform;

[0048] (2) Afterwards, add 0.2g dibenzoyl peroxide and 0.2g dicumyl peroxide initiator, after uniform stirring, be warming up to 85 ℃ and carry out prepolymerization, obtain styrene / expanded graphite prepolymer, stand-by ;

[0049] (3) add the deionized water of 110g in reactor;

[0050] (4) While stirring evenly, add 0.5g polyvinyl alcohol and 1.5g calcium triphosphate in turn, and continue...

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Abstract

The invention relates to a preparation method of a high flame retardant polystyrene/expanded graphite composite foaming material. The method comprises the following steps: adding surfaced modified expanded graphite powder with the grain size of 200-500 meshes and nanometer aluminium hydroxide into styrene monomers containing initiating agent and auxiliary agent, stirring evenly, warning up and carrying out prepolymerization; then adding into a water phase in which dispersing agent and suspending agent are dissolved, stirring, mixing and carrying out suspension polymerization at a certain temperature for 4-8hours; adding foaming agent with the weight being 9-11% of the styrene monomers, continuously carrying out polymerization at the temperature above 90 DEG C to obtain foamable composite particles, and carrying out foaming and compression molding on the composite particles to obtain the composite material with favorable heat insulation property and flame retardant property.

Description

technical field [0001] The invention belongs to the fields of organic / inorganic composite materials, polymer physics, polymer chemistry and thermal insulation materials, and relates to the surface graft modification of inorganic powder, physical expansion type flame retardancy and suspension polymerization method of polystyrene. Background technique [0002] Today's world is facing the serious reality that energy reserves are gradually decreasing, energy consumption demand is increasing, and prices are rising. People's living conditions and environment are improving. Therefore, building energy conservation was born. Expanded polystyrene materials have been used as heat insulation boards for energy saving and consumption reduction in buildings because of their light weight, thermal insulation performance and comprehensive performance; while inorganic thermal insulation materials are economical and compressive. High, flame retardant, but inorganic thermal insulation materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F2/18C08K3/04C08K3/22
Inventor 丁友江
Owner SHANGHAI BOTAO ENVIRONMENT PROTECTION SCI & TECH
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