Halogen-free flame retardation polycarbonate material and preparation method thereof

Abstract

A halogen-free flame retardation polycarbonate material comprises, by weight, 70-90% of polycarbonate, 5-10% of other resins, 6-15% of a halogen-free flame retardant, 5-15% of a surface modifier, 3-10% of a flexibilizer, 0.6-2.5% of an antioxidant,0.4-2.5% of a lubricant and 0.3-1.2% of a weather resisting agent. The halogen-free flame retardation polycarbonate material fully performs a synergistic flame retardation effect, substantially improves the flame retardation performance of a PC material, has the advantages of high efficiency, no toxicity, low smoke and dropping resistance, excellent flame retardation performance, excellent mechanical performances, good processing fluidity, high thermal deformation temperature, good impact resistance, moderate cost, and suitableness for industrial application.

Description

technical field [0001] The invention relates to the field of polymer engineering plastics and their molding processing, in particular to a halogen-free flame-retardant polycarbonate material and a preparation method thereof. Background technique [0002] Polycarbonate (abbreviated as PC, hereinafter referred to as PC) is a kind of non-crystalline thermoplastic engineering plastics. It is also known as the five general-purpose engineering plastics together with ABS, POM, PA, and PBT. PC has good transparency, high strength, high rigidity, and stable dimensions. It has excellent mechanical properties, good impact resistance, high heat distortion temperature, and good creep resistance and colorability. It is widely used in aerospace, mechanical transportation, electronic appliances, Construction transportation, information storage and many other fields. [0003] PC has a high decomposition temperature, low combustion heat, and high char formation rate. It already has certain f...

AI Technical Summary

Problems solved by technology

At present, most flame-retardant materials generate a large amount of smoke during combustion, and easily release toxic, corrosive, and carcinogenic gases. The smoke spreads quickly and the visibility is low. Once it catches fire, it will cause great problems.

[0005] Brominated flame retardants can capture free radicals in the combustion reaction, terminate the occurrence of chain reactions, have high flame retardant efficiency, excellent thermal stability and dispersibility, sufficient sources of raw materials, mature preparation processes, and low prices, but contain Halogen is easy to cause harm to the human body and the environment; phosphorus-based flame retardants include red phosphorus and ammonium polyphosphate, etc., which are widely used and mature in technology, but have poor stability, dust and explosion hazards, and are prone to produce toxic substances at processing temperatures , some products have the disadvantages of difficulty in recycling and low recyclability. The halogen-free and environmentally friendly phosphorus-based flame retardants can also significantly reduce the heat distortion temperature and impact strength of materials; sulfonates and their compounds can play a role in the condensed phase. The flame retardant efficiency is high, and only a very small amount of addition can achieve a high flame retardant grade, but the hydrolytic stability of sulfonate flame retardant PC is not good, and the content of sulfonate in PC is very small, which will lead to dispersion low uniformity

[0006] At present, the use of brominated flame retardants has been reduced due to their high toxicity, and the price of sulfonate flame retardants is very expensive, which is not conducive to industrial production. Halogen-free and environmentally friendly phosphorus-based flame retardants are gradually being widely used. However, halogen-free The addition of environmentally friendly phosphorus-based flame retardants will significantly reduce the heat distortion temperature and impact strength of the PC substrate, making it difficult to balance the mechanical properties and flame retardancy of the product

Images