A high-efficiency enhanced halogen-free flame-retardant functional masterbatch for polypropylene direct injection molding and its preparation method

Abstract

The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency enhanced halogen-free flame-retardant functional masterbatch and a preparation method thereof which can be directly applied to injection molding of polypropylene products; the functional masterbatch is composed of A and B two A combination of masterbatches, the mass percentage of A masterbatch is as follows: glass fiber 50.0~70.0 wt.%, high flow polypropylene 15.0~35.0 wt.%, elastic ionomer 5.0~10.0wt.%, random polymer 3.0-6.0 wt.% of propylene, 1.0-3.0 wt.% of maleic anhydride grafted polypropylene, 1.0-3.0 wt.% of polytetrafluoroethylene powder, 0.1-0.3 wt.% of antioxidant; prepared by the present invention Compared with the traditional plastic functional masterbatch, the functional masterbatch avoids the modification effect caused by the mutual shear friction and heat generation between the glass fiber and the flame retardant during the processing of the enhanced halogen-free flame retardant polypropylene modification system, and solves the problem at the same time. It solves the problem of mutual loss of modification performance caused by the mismatch of the processing temperature of the above two modification systems, and significantly enhances the modification performance of the two.

Description

technical field

[0001] The invention belongs to the technical field of plastic modification and processing, and in particular relates to a high-efficiency enhanced halogen-free flame-retardant functional masterbatch which can be directly applied to injection molding processing of polypropylene products and a preparation method thereof. Background technique

[0002] Using twin-screw extruder to implement melt blending is a traditional method for plastic modification. Using the high-efficiency and excellent mixing performance of co-rotating twin-screw extruders, thermoplastics and various modified additives can be continuously melt-blended and extruded After granulation, the prepared modified special material will be used again for injection or extrusion processing to form various products. This technical route not only effectively improves the physical and mechanical properties of plastic products such as strength, toughness, stiffness, creep resistance, and flexure resistanc...

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