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
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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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