High flame retardant polystyrene and its preparation method

A polystyrene and high flame retardant technology is applied in the field of polystyrene materials and their preparation to achieve the effects of satisfying fire resistance requirements, improving flame retardancy and low cost of raw materials

Active Publication Date: 2015-10-21
ZHENJIANG SANWA FLAME RETARDANT ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the enhancement of environmental awareness and safety awareness, a series of safety and environmental issues brought about by halogen flame retardant systems will increasingly attract more attention.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to the formula, weigh 100g of deionized water in a high-pressure polymerization kettle, put in 2g of active calcium phosphate, 2g of sodium dodecylbenzenesulfonate, and 2g of dibenzoyl peroxide, stir, put in 200g of styrene, and heat up to make the kettle temperature constant React at 85°C; after reaching ≥85% conversion, add 7.5g aluminum hypophosphite, 7.5g aluminum phenylphosphinate, 7.5g dimethyl methylphosphonate and 7.5g bis(2-methylphosphonate) Methyl-5-ethyl-2-oxo-1,3,2-dioxaphosphacyclohexyl-5-methylene) ester compound flame retardant; when the particles become hard, add an appropriate amount Activated calcium phosphate, add 10g pentane at the same time; seal the reaction kettle, heat up to 115°C and keep it for a period of time, then cool down to 38°C for discharging; wash and dry to obtain material beads; foam; the pre-foamed foam balls are cured at room temperature for 24 hours, and then the polystyrene material with high flame retardant performanc...

Embodiment 2

[0035]According to the formula, weigh 100g of deionized water into a high-pressure polymerization kettle, put in 2.5g of active calcium phosphate, 2.5g of sodium dodecylbenzenesulfonate, and 2.5g of dibenzoyl peroxide, stir, put in 200g of styrene, and heat up to make The temperature of the kettle was kept constant at 85°C; after the conversion rate of ≥85% was reached, 7.5g of aluminum hypophosphite, 7.5g of aluminum phenylphosphinate, 7.5g of dimethyl methylphosphonate and 7.5g of methyl were added. Phosphonic acid bis(2-methyl-5-ethyl-2-oxo-1,3,2-dioxaphosphacyclohexyl-5-methylene) ester compound flame retardant; when the particles become After hardening, add an appropriate amount of active calcium phosphate, and add 10g pentane at the same time; seal the reaction kettle, heat up to 115 ° C and keep it for a period of time, then cool down to 38 ° C for discharging; wash and dry to obtain material beads; Foaming in a foamer; curing the pre-foamed foam balls at room temperatu...

Embodiment 3

[0038] According to the formula, weigh 100g of deionized water into a high-pressure polymerization kettle, put in 4g of active calcium phosphate, 4g of sodium dodecylbenzenesulfonate, and 2.5g of tert-butyl peroxybenzoate, stir, put in 200g of styrene, and heat up the kettle. The temperature is constant and the reaction is carried out at 90 ° C; after reaching ≥ 85% conversion rate, 5g of aluminum hypophosphite, 5g of aluminum phenylphosphinate, 5g of dimethyl methylphosphonate and 5g of methylphosphonic acid bis(2) are added. -Methyl-5-ethyl-2-oxo-1,3,2-dioxaphosphacyclohexyl-5-methylene) ester compound flame retardant; when the particles become hard, add Appropriate amount of active calcium phosphate, and 10g of pentane was added at the same time; closed the reaction kettle, heated to 115°C and kept for a period of time, then cooled to 38°C for discharging; washed and dried to obtain material beads; the obtained material beads were placed in a foamer Foaming; the pre-foamed ...

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Abstract

The invention discloses a preparation method for polystyrene with high flame retardant property and a prepared polystyrene material. Hypophosphite and phenyl phosphinates which serve as halogen-free environment-friendly solid flame retardants and a halogen-free liquid flame retardant are adopted to prepare a composite flame retardant which works on the polystyrene material. The preparation method for the polystyrene material comprises the steps of feeding a dispersing agent, an emulsifier, an initiator and styrene into a high-pressure polymerization kettle to generate reaction, and adding the composite flame retardant after a certain conversion rate is achieved; adding a foaming agent after particles are hardened; closing the reaction kettle, heating the reaction kettle, preserving the temperature, and washing and drying to obtain material ball particles; foaming the material ball particles, curing foamed balls under room temperature, and putting the foamed balls into a mold to obtain the polystyrene material with high flame retardant property. According to the preparation method and the polystyrene material, the halogen-free environment-friendly solid flame retardants and the halogen-free liquid flame retardant are mixed; the solid phase flame retardants are uniformly dispersed in the liquid phase flame retardant to achieve a synergistic flame retardant effect; the flame retardant performance of the polystyrene material is realized, and various excellent properties of the polystyrene are kept.

Description

technical field [0001] The invention relates to a polystyrene material and a preparation method thereof, in particular to a high flame retardant performance polystyrene and a preparation method thereof, including a high flame retardant performance expanded polystyrene (EPS) material and a high flame retardant performance polystyrene Extruded polystyrene (XPS) material. Background technique [0002] Polystyrene (PS) is a thermoplastic resin that is widely used because it is inexpensive and easy to mold. At present, expandable polystyrene (EPS) and extruded polystyrene (XPS) are widely used. In particular, EPS materials have developed rapidly due to their excellent performance, low cost, simple and feasible production and molding process equipment, and can be made into products with different requirements. At present, my country has become the largest EPS producer in the world, and its total production and consumption rank first in the world. Due to the superior thermal ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/14C08L25/06C08K13/02C08K3/32C08K5/5313C08K5/5333C08K5/5357C08F112/08C08F2/26C08F2/30
Inventor 杨锦飞王仲华职慧珍王国华黄小冬
Owner ZHENJIANG SANWA FLAME RETARDANT ENG TECH CO LTD
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