Magnesium solt whisker rein forced fire-resisting polypropylene composition

Abstract

The present invention relates to a magnesium salt whiskers reinforced fire-resisting polypropylene composite. Its composition includes polypropylene, magnesium salt whiskers, fire-retardant and bromobiphenylate, high-effective fire-retarding synergist Sb2O3, PP graft compatilizer, antioxidant and other adjuvant. It is characterized by that the whiskers reinforced fire-retarding smoke-inhibitor is added, and its preparation method includes the following steps: except for magnesium salt whiskers placing all the other components into high-speed mixing machine, high-speed mixing them for 2-3 min, adding magnesium salt whickers, low-speed mixing them for about 1 min, discharging material, extruding by using twin screw extruder and granulating so as to obtain the invented product. Its extruding temp. is 170-240 deg.C, and its screw rod rotating speed is 180-600 rpm. Said invention also provides its application range and field.

Description

technical field [0001] The invention relates to a magnesium salt whisker-reinforced flame-retardant polypropylene composition, which can be used for vehicle parts, home appliance parts, etc., and belongs to the technical field of polypropylene. Background technique [0002] As a general-purpose plastic, polypropylene has the characteristics of excellent processing performance, good mechanical properties, and chemical corrosion resistance. It occupies an important position in plastics, but its strength, rigidity, heat resistance, and flame retardancy The properties are far from meeting the requirements, which limits the application of polypropylene in engineering components. At present, the more common method is to modify polypropylene with glass fibers and flame retardants to achieve flame-retardant reinforced polypropylene. [0003] Chinese patent CN1079494A discloses a low-smoke flame-retardant polypropylene material prepared by using octabromoether, antimony dioxide and ...

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Problems solved by technology

[0003] Chinese patent CN1079494A discloses a low-smoke flame-retardant polypropylene material made of octabromoether, antimony dioxide and alumina hydrate as a composite flame retardant, but the mechanical properties of the material cannot meet the requirements of engineering plastics

U.S. Patent No. 6,150,442 discloses a flame-retardant polypropylene material made of tribromophenyl phosphate and antimony trioxide as a composite flame retardant, but the same mechanical properties are poor and cannot be used in engineering plastics. , Japanese Patent JP Zhao 56-149318 and Japanese Patent JP Zhao 61-256920, JP Flat 4-36092 introduce the method for preparing magnesium salt whisker simultaneously, and Chinese patent CN1288860A discloses a kind of preparation method of novel magnesium salt whisker, to Its application in high polymers, especially in flame-retardant polypropylene, has not been involved

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