Special nylon resin modification flame-retardant synergetic functional master batch and preparation method thereof

Abstract

The invention relates to the technical field of plastic modification processing and in particular discloses a special nylon resin modification flame-retardant synergetic functional master batch and apreparation method thereof. The functional master batch adopts multiple composite coated brominated polystyrene as main body flame retardant, and comprises the following components in percentage by mass: 55.0-70.0wt.% of multiple composite coated brominated polystyrene, 15.0-30.0wt.% of anhydrous zinc borate, 8.0-10.0wt.% of nylon 6 resin, 2.0-3.0wt.% of starlike nylon, 0.5-1.0wt.% of styrene-acrylonitrile copolymer coated polytetrafluoroethylene, 0.5-1.0wt.% of a dispersant and 0.3-0.5wt.% of a lubricant. Compared with a conventional plastic flame-retardant functional master batch, the flame-retardant synergetic functional master batch disclosed by the invention is capable of improving the thermal stability and the flowing dispersibility of domestic brominated flame retardant, so that theflame retardance efficiency can be improved, a flame retardance effect identical to that of a conventional flame-retardant functional master batch can be achieved with a less master batch addition amount, and in addition, the mechanical performance loss of a modified high-temperature-resistant nylon resin composite material can be effectively reduced.

Description

Technical field [0001] The invention relates to the technical field of plastic modification processing, in particular to a special flame-retardant synergistic functional masterbatch for nylon resin modification and a preparation method thereof. Background technique [0002] Nylon resin is an important class of engineering plastics, and its varieties include nylon 6, nylon 66, nylon 46, and high temperature resistant nylon (ie semi-aromatic nylon). Nylon resin is widely used in industrial and civil fields due to its excellent mechanical properties, heat resistance, chemical resistance and good processing properties, especially in automobiles, rail transit, mechanical equipment, industrial electronic and electrical equipment, household appliances, The usage in construction and other fields is huge. However, the limiting oxygen index of nylon resin is about 23 vol.%, which is a highly combustible polymer material; nylon resins used in the periphery of automobile engines and in elec...

AI Technical Summary

Problems solved by technology

In addition, in the process of nylon resin flame retardant modification and processing technology implementation, brominated polystyrene and flame retardant synergist are powder materials, and the addition amount is relatively large, directly melted by twin-screw extruder During extrusion blending, due to the limited residence time of the material in the barrel of the extruder, it is difficult to fully mix the polymer melt with the flame retardant

In addition, due to the internal heat generated by the mechanical friction between a large number of flame retardant powders during the blending and extrusion process, it will cause the decomposition of brominated polystyrene and the shedding of bromine, which not only leads to damage to the flame retardant effect, yellowing of the material, but also The physical and mechanical properties of modified nylon resin flame retardant composites are reduced

[0004] Aiming at the quality and processing problems existing in the process of flame-retardant modification of nylon resin using domestic brominated polystyrene, the present invention proposes a brand-new solution idea: using multi-layer high-density flame-retardant synergistic materials to bromide Polystyrene is coated, and then the coated brominated polystyrene is compounded with a flame retardant synergist, carrier resin and other additives to prepare a flame retardant functional masterbatch. The two-pronged approach solves the problem of poor thermal stability of domestic brominated systems, processing Defects such as easy decomposition, easy yellowing, poor fluidity, uneven dispersion, and damaged flame retardant effect during the process

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