Preparation method of flame retarding styrene polymer composite material

Abstract

The invention discloses a preparation method of a flame retarding styrene polymer composite material. The raw materials of the composite material (weight) includes 100 parts of recovered styrene polymer, 10-30 parts of flame retardant, 1-5 parts of smoke inhibitor and 5-30 parts of intensifier. The preparation method includes the following steps: 1. stirring the intensifier in a high speed mixingmachine to have the water content of 1-2% at the temperature of 105-150 DEG C and at the revolving speed of 600-1000r / min; 2. crushing the recovered styrene polymer product in a high speed crushing machine and then adding the crushed product in a double-screw machine to be extruded and pelletized; 3. sequentially adding the pellet, dry wood powder, flame retardant and smoke inhibitor in the high speed mixing machine for 5-10 min of premixing, and then discharging the mixture to a low speed cold mixing machine for 5-10 min of mixing to obtain premix; and 4. melting down the premix through the double-screw machine until or single-screw machine for pelleting to obtain the flame retarding styrene polymer composite material.

Description

technical field [0001] The invention relates to composite material technology, in particular to a method for preparing a flame-retardant styrene polymer composite material. The preparation method completely adopts recycled styrene polymer as raw material for preparation. Background technique [0002] As a downstream product of petroleum, styrene is an important synthetic monomer. The styrene polymer synthesized by homopolymerization or copolymerization has good transparency, dimensional stability, electrical insulation performance, processability and low cost. Widely used in household appliances, office equipment, instruments, auto parts, daily appliances and packaging materials. Expanded polystyrene has thermal insulation and thermal insulation properties and is widely used in thermal insulation and thermal insulation materials in the construction industry. However, due to the non-renewability of petroleum resources and the dwindling of the world's petroleum reserves, the...

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Problems solved by technology

Although the above-mentioned flame-retardant styrenic polymer or composition has obtained a good flame-retardant effect, since the flame retardant used is a halogenated flame retardant, especially a brominated flame retardant, this type of flame retardant is During the decomposition process, toxic and corrosive hydrogen halide gases will be released, especially polybrominated diphenyl ether flame retardants will produce carcinogenic dioxins, which has restricted their application in Europe and the United States

Even though some brominated flame retardants will not produce carcinogenic dioxins, they will still release corrosive hydrogen halide gas during their decomposition, which will bring great difficulties to personnel evacuation and rescue work in the event of a fire

At the same time, the addition of flame retardants used in the above patents is generally large, which seriously affects the original properties of styrene polymers, and the use of halogen flame retardants will lead to poor light resistance of the prepared styrene polymers , increased brittleness

[0005] Chinese patent CN101062992 uses halogen-free flame retardant ammonium polyphosphate pentaerythritol ester and carbon forming agent poly 2,6-dimethyl-1,4-phenyl ether to prepare halogen-free flame-retardant high-impact polystyrene composition, although the flame retardant The combustion efficiency is high, but the addition of flame retardants is relatively large, which will also have a negative impact on the overall performance of the composition

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