Halide-free flame-resistant high anti-impact polystyrene complex and method for production thereof

A technology of flame-retardant high-impact polystyrene and polystyrene resin, which is applied in the field of polymer materials, can solve the problems of reduced mechanical properties, low processing temperature, and poor stability, and achieves improved dispersion, reduced internal friction, and easy The effect of processing

Inactive Publication Date: 2004-08-18
KINGFA SCI & TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The use of chlorinated paraffin can effectively flame-retardant HIPS, and there is no dioxin/difuran problem, but its stability is poor, its decomposition temperature is only 170 ° C, which is lower than the processing temperature of HIPS, and its decomposition

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] The preparation of the halogen-free flame-retardant high-impact polystyrene compound of the present invention adopts HIPS, the flame retardant is microencapsulated red phosphorus, and the impact modifier is styrene / butyl acrylate binary graft modified EPDM ( EPDM-g-St / BA).

[0021] Because the partially cross-linked EPDM has a very low glass transition temperature and high strength. The grafted styrene / butyl acrylate copolymer not only has good compatibility with HIPS, but also has good flexibility of the grafted chain due to the presence of butyl acrylate. These characteristics make EPDM-g-St / BA have a good toughening effect on HIPS and can maintain the rigidity of HIPS.

[0022] The high-impact polystyrene resin, impact modifier, flame retardant, flame retardant synergist, coupling agent antioxidant and processing aid are fully mixed under high-speed stirring, and then melted and mixed by a twin-screw extruder. refining, extrusion, cooling, drying, pelletizing and p...

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Abstract

The present invention is halogen-free fireproof polystyrene composition with high shock strength and its preparation, and belongs to the field of polymer material. The composition contains polystyrene resin with high shock strength 70-90 wt%, fire retardant 5-25 wt% and machining assistant 0.5-5 wt%, and is prepared through high speed pre-mixing and once extrusion process. The composition has serial advantages of being fireproof, environment friendly, weatherproof, hot stable, high in mechanical performance, easy in machining, etc. It is suitable for use in display, video recorder, copying press, facsimile machine, printer, air conditioner, refrigerator, etc.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant compound and a preparation method thereof. Background technique [0002] Polystyrene (PS) was industrialized in 1930 by I.G Farben (predecessor of BASF) in Germany. As one of the five general-purpose plastics, it has the advantages of excellent formability, hard quality, transparency, rigidity, electrical insulation, low hygroscopicity, easy dyeing and low price. High-impact polystyrene (HIPS) is produced by adding a small amount of elastomer to PS, which overcomes the brittleness of polystyrene and is widely used in electronics, automobiles, home appliances, instruments, daily necessities, toys, etc. industry. However, HIPS is easy to burn, has poor weather resistance, and has poor fluidity after modification. It is not suitable for the manufacture of high surface requirements and large thin-walled products, which limits its further promotion and...

Claims

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Application Information

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IPC IPC(8): C08K5/521C08L25/06
Inventor 蔡彤旻薄文海叶南飚王林张万昌
Owner KINGFA SCI & TECH CO LTD
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