Methyl octabromo-ether flame-resistant polystyrene composite material, and preparation method thereof

Abstract

The invention discloses a methyl octabromo-ether flame-resistant polystyrene composite material, and a preparation method thereof. The methyl octabromo-ether flame-resistant polystyrene composite material comprises, by weight, 70 to 90 parts of polystyrene, 1 to 10 parts of methyl octabromo ether, 0.2 to 5 parts of a bromine-series flame retardant synergist, 1 to 10 parts of phosphorus-nitrogen-series flame retardant, 1 to 10 parts of a lubricating dispersant, and 1 to 20 parts of a filler. The invention also discloses the preparation method of the methyl octabromo-ether flame-resistant polystyrene composite material. The preparation method comprises following steps: the components are uniformly stirred, and are introduced into an extruder for extrusion, wherein the temperature of the extruder is controlled to be 170 to 210 DEG C. According to the preparation method, methyl octabromo ether is adopted to replace the commonly used polystyrene flame retardant hexabromocyclododecane, and at the same time, the phosphorus-nitrogen-series flame retardant is added for synergistic effect, so that the prepared polystyrene composite material has excellent resistance and excellent mechanical properties at the same time, the tensile strength is 31.2-34.6MPa, the bending strength is 42.3 -47.0MPa, and limit oxygen index is 30-39%.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a methyl octabromoether flame-retardant polystyrene composite material and a preparation method thereof. Background technique [0002] Polystyrene PS is a general-purpose thermoplastic resin, which is widely used in building insulation and other fields because of its low price and easy processing. At present, the most widely used polystyrene resins are expandable polystyrene EPS and extruded polystyrene foam XPS. It is widely used in fields such as building exterior wall insulation. However, since polystyrene is composed entirely of carbon and hydrogen elements, it is extremely flammable in nature, and its limiting oxygen index is only 18%, which is a flammable material. Moreover, when burning, the amount of smoke is large, and it is easy to generate molten droplets and ignite other materials, so the material is extremely prone to fire during stacking and construction. [0003...

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Problems solved by technology

[0006] CN109180881A prepares polystyrene flame retardant material by free radical polymer method. This method has complex process and cannot complete the processing and molding of flame retardant polystyrene composite material on the extruder. The process is complex and not easy to popularize, so it is not suitable for downstream production Manufacturer processing application

Magnesium hydroxide and decabromodiphenyl ether are used to prepare low-smoke flame-retardant polystyrene, and decabromodiphenyl ether is a non-environmentally friendly flame retardant. On February 9, 2017, the European Union published regulations (EU) in the official gazette In 2017 / 227, the flame retardant - decabromodiphenyl ether (DecaBDE) was officially added to REACH Regulation (EC) No 1907 / 2006 Appendix XVII, becoming a controlled substance in Article 67 of REACH Appendix XVII, and its application has been greatly limited

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