Low-smoke-density flame-retardant PC composition

Abstract

The invention discloses a low-smoke-density flame-retardant PC composition. The low-smoke-density flame-retardant PC composition is prepared from the following raw materials in parts by weight: 10 to 85 parts of PC resin, 5 to 50 parts of organic silicon PC, 0.1 to 2 parts of sulfonate flame retardant, 0 to 10 parts of phosphorus flame retardant, 0.3 to 5 parts of organic silicon flame retardant, 2 to 40 parts of reinforced filler and 0.5 to 5 parts of nano material. According to the low-smoke-density flame-retardant PC composition disclosed by the invention, by compounding a flame-retardant system and adding an inorganic nano material, the efficiency of a flame retardant can be improved and the release of combustible gas during degradation of the material is slowed down and reduced by virtue of a relatively large nano specific surface energy, so that smoke formation and combustion of the material are slowed down, and a low-smoke-density flame-retardant effect is achieved while the additive amount of the flame retardant is low; the low-smoke-density flame-retardant PC composition disclosed by the invention can be applied to the fields of rail transit, aerospace, buildings and the like which have strict requirements on the combustion smoke density of materials.

Description

technical field

[0001] The invention belongs to the technical field of low-smoke density flame-retardant compositions, and in particular relates to a low-smoke density flame-retardant PC composition. Background technique

[0002] PC has high impact strength and is a widely used engineering plastic. PC itself has a high carbon content and is self-extinguishing when the thickness is high. It is widely used in electronic appliances, rail transit, construction, etc. that require flame retardancy. field. The high carbon content of PC will produce more smoke when burning, especially after adding phosphorus flame retardant, at 50kW / m 2 Tested under the heat flux, the degradation or combustion of PC and flame retardants will produce greater smoke density. The disadvantages in the current prior art patents are: SabicUS9266541B2 uses a PC copolymerization scheme, which is expensive and not suitable for common raw material factories, and the material loses the performance of bispheno...

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