Ultrahigh-toughness flame-retardant mineral powder filling PC (polycarbonate) material and preparation method thereof

Abstract

The invention discloses an ultrahigh-toughness flame-retardant mineral powder filling PC (polycarbonate) material and a preparation method thereof. The ultrahigh-toughness flame-retardant mineral powder filling PC material is prepared from the following components in pars by weight: 20 to 30 parts of PC resin, 40 to 50 parts of PC flame-retardant master batch, 4 to 10 parts of toughening agent, 1 to 2 parts of compatilizer, 15 to 25 parts of mineral powder, 0.2 to 0.3 part of antioxidant, 0.1 to 0.4 part of anti-dripping agent, and 0.2 to 0.3 part of lubricant. The preparation method comprises the following steps of firstly, weighing the components according to a proportional ratio; uniformly mixing by steps; finally, melting and extruding on a double-screw extrusion machine, cooling, cutting grains, and drying, so as to obtain the ultrahigh-toughness flame-retardant mineral powder filling PC material. The ultrahigh-toughness flame-retardant mineral powder filling PC material has the advantages that the flame-retardant PC material is reinforced by the mineral powder; compared with the mineral powder and glass fiber, the particle size is smaller, the softer effect is realized, the friction force with a die is smaller, and the maintenance time of the die is greatly shortened; the influence to the impact strength of PC resin by the mineral powder is less, the toughness is very high, the warp is low, and the modulus is high; compared with the convention PC+GF material, the damage to the die is greatly reduced in the use process, and the high light effect is realized.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to an ultra-high toughness flame-retardant mineral powder filled polycarbonate material and a preparation method thereof. Background technique [0002] Due to good toughness, high modulus, high heat resistance and low linear expansion coefficient, PC+GF has been used in the plastic frame of medium and large LCD TVs for a long time. However, due to the existence of glass fiber in the material, floating fibers are easily produced in the product, and the long-term injection molding will cause serious damage to the mold. [0003] The glass fiber has a columnar structure, which is easy to cause damage to the surface of the mold during the injection molding process. At the same time, due to the inconsistent fluidity of the glass fiber and the resin, the mold temperature is low, so that the light-weight and fast-condensing glass fiber condenses first, and cannot be fully surround...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of severe fiber floating and damage to the mold of the conventional PC+GF material, the present invention proposes an ultra-high toughness

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