Special halogen-free flame-retardant synergistic functional masterbatch for polyolefin resin modification and preparation method thereof

Abstract

The invention relates to the technical field of plastic modification processing, in particular to special halogen-free flame-retardant synergistic functional masterbatch for polyolefin resin modification and a preparation method thereof. According to the functional masterbatch, multiple composite coated ammonium polyphosphate is used as a phosphorus-based flame retardant; the functional masterbatch is prepared from the following components in percentage by mass: 55.0-65.0 wt.% of the multiple composite coated ammonium polyphosphate, 25.0-35.0 wt.% of a nitrogen flame retardant, 7.0-11.0 wt.% of carrier resin, 0.5-1.0 wt.% of styrene-acrylonitrile copolymer coated polytetrafluoroethylene, 0.5-1.0 wt.% of a dispersing agent and 0.3-0.5 wt.% of a lubricating agent. Compared with the traditional flame-retardant functional masterbatch, the functional masterbatch prepared by the invention has the advantages that the thermal stability of ammonium polyphosphate is remarkably improved, and thewater resistance of the ammonium polyphosphate is enhanced, so that the flame-retardant effect of the ammonium polyphosphate on polyolefin resin is more effectively improved.

Description

technical field [0001] The invention relates to the technical field of plastic modification processing, in particular to a special halogen-free flame retardant synergistic functional masterbatch for polyolefin resin modification and a preparation method thereof. Background technique [0002] Polyolefin resin is the most widely used general-purpose plastic in the world. Since polyolefin resin is an extremely flammable plastic, it is often necessary to implement flame-retardant modification when it is used in household appliances, industrial electronic appliances, and automobiles. to improve its safety. Flame retardant modification of plastics can be achieved by adding flame retardants and melt blending through a twin-screw extruder. Flame retardants can prevent polyolefin resin plastics from being ignited and inhibit flame propagation, which can effectively improve their combustion resistance. According to the classification of flame retardant elements, flame retardants can...

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Problems solved by technology

[0005] The purpose of the present invention is to address the strong hygroscopicity, poor thermal stability, and interfacial bonding of ammonium polyphosphate in the application process of halogen-free flame-retardant polyolefin resin modification. Application defects such as weak resistance, large loss of flame retardant performance, low fluidity, poor dispersibility, etc., as well as problems such as thermal degradation caused by powder friction during twin-screw direct blending extrusion processing, resulting in flame retardant performance and physical and mechanical decline. At the same time, it overcomes the defect that the traditional polymer or inorganic wall material can not provide enough protection for single-layer coating of ammonium polyphosphate. Then it is mixed with the corresponding flame retardant synergist and auxiliary agent at low temperature to prepare a halogen-free flame retardant synergistic functional masterbatch for polyolefin resin halogen-free flame retardant modification

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