Low-smoke halogen free flame retardant, preparation method and method thereof for preparing flame-resistant materials

Abstract

The invention belongs to the field of flame-resistant wires and cables, and particularly relates to a low-smoke halogen free fire retardant, a preparation method and a method for preparing flame-resistant materials. The low-smoke halogen free fire retardant comprises the following components with weight portions: 40 to 50 portions of polyolefin, 8 to 15 portions of antimonous oxide, 35 to 45 portions of tetrabromoph and 2 to 5 portions of ferrocene. The preparation method comprises the following steps of: firstly mixing the needed components according to the weight portions, stirring evenly and obtaining premix; and then extruding and pelleting to the premix under the condition of 130 to 180 DEG C by an extruder, namely obtaining the flame resistant. The following component according to the following proportion: flame resistant: polyolefin: dibutyltin dilaurate=30:65:5, and then the mixture is extruded on the extruder in an insulating manner. The flame-resistant material has better flame-resistant effect and can realize the low-smoke halogen-free purpose.

Description

technical field [0001] The invention belongs to the field of flame-retardant wires and cables, and in particular relates to a low-smoke, low-halogen flame retardant, a preparation method thereof, and a method for preparing a low-smoke, low-halogen flame retardant from the flame retardant. Background technique [0002] Flame-retardant polyvinyl chloride plastic (PVC) is used as the insulating layer of wires and cables, and its flame-retardant effect is good, but when it burns, it will produce a lot of dense smoke, which is mainly hydrogen chloride gas. Since hydrogen chloride is poisonous, these dense smoke Not only will it affect escape, but it will also cause harm to the human body. [0003] As an insulating material, polyolefin itself is halogen-free, but because it is flammable, it needs to add flame retardants when using it. The common method is to add halogen-containing flame retardants. However, flame-retardant polyolefins with high halogen content are Compared with f...

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Problems solved by technology

[0002] Flame-retardant polyvinyl chloride plastic (PVC) is used as the insulation layer of wires and cables, and its flame-retardant effect is better, but when it burns, it will produce a lot of smoke. The dense smoke is mainly hydrogen chloride gas, because hydrogen chloride is poisonous, these dense smoke will not only affect the escape, but also cause harm to the human body

[0003] As an insulating material, polyolefin itself does not contain halogen, but because it is flammable, it is necessary to add a flame retardant when using it. The common method is to add Halogenated flame retardants, however, flame retardant polyolefins with high halogen content have no advantages over flame retardant PVC in terms of performance and cost, so they are used less

[0004] When adding inorganic flame retardants to polyolefin, although it can achieve the purpose of being halogen-free, but the flame retardant effect is not good, so in order to achieve the same as adding halogen-containing flame retardant When the flame retardant effect is the same as that of the agent, the amount of the inorganic flame retardant added is often larger. Although it can achieve a better flame retardant effect at this time, due to the addition of too much inorganic flame retardant, it will not be able to pass the extrusion process. , and will significantly affect the mechanical properties of the insulation

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