High-fluidity antibacterial halogen-free flame retardant composite material and preparation method thereof

Abstract

The invention discloses a high-fluidity antibacterial halogen-free flame retardant composite material. The composite material comprises polypropylene, halogen-free flame retardants, modified hydrotalcite, antioxidants, lubricating agents, anti-dripping agents, titanium dioxide and antibacterial agents. The composite material has a higher melt flow index, a hydrotalcite precursor and silver nitrateare mixed and calcined, molybdate is added into mixture to prepare the modified hydrotalcite, the modified hydrotalcite is added, so that multiple performances are provided, flame-retardant efficiency can be improved, flame-retardant level reaches UL94 1.6 V-0, and high antibacterial action can be achieved under less antibacterial agents. Molybdic acid ions are introduced between hydrotalcite layers, so that the composite material has a smoke suppression function.

Description

technical field

[0001] The invention relates to a modified polypropylene material and a preparation method thereof, in particular to a high-flow antibacterial halogen-free flame-retardant composite material and a preparation method thereof. Background technique

[0002] As one of the five general-purpose plastics, polypropylene is widely used in household appliances, automobiles and building materials because of its excellent mechanical properties, good heat resistance, high chemical stability, excellent electrical insulation, and good processability. Polypropylene has a low oxygen index and is extremely flammable, which greatly limits its application. Therefore, if it wants to expand its application range, it must be modified by flame retardancy.

[0003] Layered double hydroxides (LDHs for short), also known as hydrotalcites, are a new type of layered functional materials. Due to the unique structural composition of LDHs, LDHs have unique acid-base bifunctionality, interl...

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