Composite flame retardant and preparation method thereof, polypropylene composite material and preparation method thereof, electrical insulating part

Abstract

The invention provides a composite flame retardant, a preparing method thereof, a polypropylene composite material, a preparing method of the polypropylene composite material and an electrically insulating member, and relates to the field of polymer materials. The preparing method of the composite flame retardant overcomes a problem that polypropylene materials are poor in flame retardance stability and poor in flame retardance long-term effectiveness, and includes providing hard particle powder, calcium carbonate, a surfactant and a flame retardant, with the particle size of the hard particlepowder being lower than the particle size of the calcium carbonate, and the particle size of the flame retardant being lower than the particle size of pores to be formed on the surface of the calciumcarbonate; and mixing and stirring the hard particle powder, the calcium carbonate, the surfactant and the flame retardant so that the hard particle powder form pores on the surface of the calcium carbonate, and the pores are filled with the flame retardant and the hard particle powder. The surfactant is bonded with hydrophilic hydroxy on the surface of calcium carbonate absorbing moisture and isused for preventing agglomeration of the calcium carbonate. The methods are used for preparing the composite flame retardant, the polypropylene composite material including the composite flame retardant and the electrically insulating member including the composite flame retardant.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a composite flame retardant and a preparation method, a polypropylene composite material and a preparation method, and an electrical insulating part. Background technique [0002] The requirements for the material of the switch socket are: to have high strength, high toughness, high heat resistance, high flame retardancy, high electrical insulation performance, etc. The conventional material selection scheme in the industry is to use flame-retardant ABS (acrylonitrile-butadiene-styrene copolymer, acrylonitrile-butadiene-styrene copolymer) materials and flame-retardant PC (Polycarbonate, polycarbonate) materials. With the control of product cost, the application of polypropylene material on the socket has become a trend. [0003] In the prior art, the flame retardant properties of materials are improved by adding flame retardants to polypropylene and other substrates, but due to ...

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Problems solved by technology

[0003] In the prior art, the flame retardant properties of materials are improved by adding flame retardants to polypropylene and other substrates, but due to the uneven distribution of flame retardants in the substrates, the stability of flame retardant performance is poor, and at the same time, during long-term use , the flame retardant is easy to fail, resulting in the deterioration of the flame retardant performance of the material

In response to this problem, the flame retardant properties of materials are generally improved by increasing the amount of flame retardants, but increasing the amount of flame retardants can easily lead to a decrease in the mechanical properties of materials

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