Preparation method of coated halogen-free flame-retardant foamable polystyrene

A foamed polystyrene, expandable polystyrene technology, applied in the direction of adhesive types, aldehyde/ketone condensation polymer adhesives, polymer adhesive additives, etc., can solve the problem of adding composite flame retardants. It can avoid fire, improve flame retardant and smoke suppression function, and highlight flame retardant and smoke suppression performance.

Inactive Publication Date: 2013-03-20
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a composite flame retardant and the addition of a large amount of composite flame retardant makes the mechanical properties of the final product greatly reduced

Method used

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  • Preparation method of coated halogen-free flame-retardant foamable polystyrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Synthesis of halogen-free flame retardant expandable polystyrene particles:

[0029] First add 150g of deionized water to the reactor, then add 0.3g of polyvinyl alcohol, raise the temperature to 75°C to completely dissolve the polyvinyl alcohol, then add 1.5g of tricalcium phosphate, and mix well to obtain a mixed solution A;

[0030] Then 15g of ammonium polyphosphate is added to the reaction kettle containing 100g of styrene, stirred evenly and 0.08g of benzoyl peroxide is added to obtain a mixed solution B containing monomers;

[0031] Then add the above mixed solution B to the mixed solution A, adjust the stirring speed to 500 rpm, heat the reaction vessel, control the temperature at 75°C for 1 hour, then raise the temperature to 85°C, continue the reaction for 2 hours, use a straw Take the reaction material and observe it in a surface device. When the particles of the reaction material become hard and brittle, add 12g of pentane foaming agent to the reaction k...

Embodiment 2

[0038] (1) Synthesis of halogen-free flame retardant expandable polystyrene particles:

[0039] First add 140g of deionized water to the reaction kettle, then add 0.2g of polyvinyl alcohol, raise the temperature to 75°C to completely dissolve the polyvinyl alcohol, then add 1.8g of tricalcium phosphate, and mix well to obtain a mixed solution A;

[0040] Then 16g of ammonium polyphosphate was added to the reaction kettle containing 100g of styrene, stirred evenly and 0.07g of benzoyl peroxide was added to obtain a mixed solution B containing monomers;

[0041] Then add the above mixed solution B into the mixed solution A, adjust the stirring speed to 600 rpm, heat the reaction kettle, control the temperature at 75°C for 1 hour, then raise the temperature to 84°C, continue the reaction for 2 hours, use a straw Take the reaction material and observe it in a surface device. When the particles of the reaction material become hard and brittle, add 14g of pentane foaming agent to th...

Embodiment 3

[0048] (1) Synthesis of halogen-free flame retardant expandable polystyrene particles:

[0049] First add 130g of deionized water into the reactor, then add 0.15g of polyvinyl alcohol, raise the temperature to 75°C to completely dissolve the polyvinyl alcohol, then add 1.1g of tricalcium phosphate, and mix well to obtain a mixed solution A;

[0050] Then 15g of PNP expansion flame retardant was added to the reaction kettle containing 100g of styrene, stirred evenly and 0.09g of benzoyl peroxide was added to obtain the mixed liquid B containing the monomer;

[0051] Then add the above mixed solution B to the mixed solution A, adjust the stirring speed to 600 rpm, heat the reactor, control the temperature at 75°C for 1 hour, then raise the temperature to 85°C, continue the reaction for 2 hours, use a straw Take the reaction material and observe it in a surface device. When the particles of the reaction material become hard and brittle, add 14g of pentane foaming agent to the rea...

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Abstract

The invention belongs to the field of expandable polystyrene heat insulating materials, and particularly relates to a preparation method of coated halogen-free flame-retardant foamable polystyrene. The method comprises the following steps: adding polyvinyl alcohol and tricalcium phosphate into deionized water, and evenly mixing to obtain a mixed solution A; adding ammonium polyphosphate, melamine polyphosphate or PNP intumescent flame retardant into styrene, and adding benzoyl peroxide to obtain a mixed solution B; adding the mixed solution B into the mixed solution A to react, and adding a foaming agent to react to obtain halogen-free flame-retardant foamable polystyrene granules; and adding the prepared granules into a phenol formaldehyde resin or melamine resin binding agent containing small amounts of alkali silicate water solution and smoke inhibitor to carry out coating, thereby finally obtaining the coated halogen-free flame-retardant foamable polystyrene granules. The coated halogen-free flame-retardant foamable polystyrene has the advantages of excellent thermal insulation and heat shielding properties, and outstanding flame retardancy and smoke inhibition property, and can be used a flame-retardant architectural thermal insulation material.

Description

technical field [0001] The invention belongs to the field of expandable polystyrene heat insulation materials, and in particular relates to a preparation method of coated halogen-free flame-retardant expanded polystyrene. Background technique [0002] Since 2007, various external wall insulation materials have been widely used, and fires have been caused one after another. The fire in the new building of CCTV, the fire in the apartment of high-level teachers in Jing'an District, Shanghai, the two fires in the gymnasium of Jinan Olympic Sports Center, and the fire in the "360-degree longitude and latitude" Gemini Building in Harbin are all related to thermal insulation materials. Statistics show that in recent years, 90% of high-rise fires are related to insulation materials. In the current thermal insulation material market, expandable polystyrene is the most used material, accounting for about 80%. The reason why polystyrene foam boards and other thermal insulation materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/224C08J9/16C08L25/06C08K3/34C08K3/32C08K5/3492C08F112/08C08F2/44C09J161/06C09J161/28C09J11/04C09J11/06C09J11/08
Inventor 洪晓东姜海艳刘思远杨东旭邓恩燕郑国阔
Owner LIAONING TECHNICAL UNIVERSITY
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