Flame-retardant polypropylene material and preparation method thereof

Abstract

The invention relates to a flame-retardant polypropylene material. The material is prepared from 35 parts of a polypropylene random copolymer, 11 parts of maleic anhydride grafted polypropylene, 8 parts of powdery polyphenylene sulfide, 13 parts of hydroxyl-terminated hyperbranched polyester, 9 parts of a rare earth coupling agent, 18 parts of ammonium polyphosphate, 5 parts of cerium hydroxide, 15 parts of coupling agent modified nano talcum powder and 3 parts of an antioxidant. A preparation method of the material comprises the steps as follows: (1) weighing raw materials in a formula in theweight ratio, putting the raw materials in a high-speed mixer, and stirring the raw materials for 25 min to be uniformly mixed; (2) putting the mixed raw materials in step (1) in a feeding hopper ofa twin-screw extruder, and performing melt extrusion and granulation; the processing technology is as follows: the temperature range of a barrel of the twin-screw extruder is 190 DEG C and the temperature of a die head is controlled at 170 DEG C. The material has the benefits as follows: the material has high mechanical strength, good elasticity and flame-retardant effect and excellent wear resistance and tear resistance.

Description

technical field [0001] The invention relates to the field of wire and cable materials, in particular to a flame-retardant polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a semi-crystalline thermoplastic with high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion. It is widely used in wire and cable, building materials, automobile industry, household Electrical appliances, packaging materials, etc. Due to the poor flame retardancy of polypropylene, it is easy to burn. Its limiting oxygen index (LOI) is 18.5. Applications in the field of cables. Most of the products currently on the market are polypropylene cable materials modified by adding halogen-free flame retardants. [0003] However, the halogen-free flame-retardant polypropylene cable materials currently on the market generally have poor mechanical strength and elasticity, and are not w...

AI Technical Summary

Problems solved by technology

[0003] However, the halogen-free flame-retardant polypropylene cable materials currently on the market generally have poor mechanical strength and elasticity, and are not wear-resistant. The application of polypropylene cable material