High-melt-index halogen-free flame-retardant polypropylene material and preparation method thereof

Abstract

The invention relates to a high-melt-index halogen-free flame-retardant polypropylene material and a preparation method thereof. The high-melt-index halogen-free flame-retardant polypropylene materialcomprises the following components in parts by weight: 60 to 80 parts of polypropylene base material, 0.1 to 20 parts of pyrophosphoric acid piperazine, 0.1 to 20 parts of surface modified ammonium polyphosphate, 0 to 10 parts of melamine or salt thereof, 0.1 to 3 parts of coupling agent, 0.1 to 3 parts of compatilizer, 0.1 to 3 parts of antioxygen, 0.1 to 3 parts of light stabilizer, and 0.1 to1 part of white oil. The preparation method comprises the steps of weighing the raw materials in parts by weight, premixing the dried polypropylene base material and the dried white oil in a dual-motion mixer for 5 to 8 minutes, and uniformly mixing; adding the pyrophosphoric acid piperazine, the surface modified ammonium polyphosphate, the melamine or the salt thereof, the coupling agent, the campatilizer, the antioxygen and the light stabilizer according to the parts by weight, and continuously mixing for 5 to 8 minutes so as to obtain a uniform mixture; and putting in a charging hole of a double-screw extruder, mixing and extruding the materials through a screw rod, and extruding from a die head. Compared with the prior art, the halogen-free polypropylene material provided by the invention can effectively solve the problems such as high pollution of a traditional triazine carbon-forming agent system, poor compatibility of a flame retardant and a matrix, and low flame retardant efficiency.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to a high-melting-point halogen-free flame-retardant polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the fastest-growing general-purpose plastics. It has excellent impact resistance, acid and alkali resistance, corrosion resistance, temperature resistance, low density and excellent mechanical properties. Its preparation raw materials are mainly derived from petroleum by-products, the price is low, and its excellent processing performance makes it an excellent substitute for wood, ceramics, metal, glass and other products, and is widely used in electronic appliances, packaging, auto parts, textiles , home appliances, construction and many other fields. In particular, polypropylene materials with higher fluidity have more significant advantages in the preparation of larger parts. Larger...

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Problems solved by technology

[0008] The object of the present invention is to provide a high-melting index halogen-free flame-retardant polypropylene material with a better flame-retardant effect and a preparation method thereof in order to overcome the above-mentioned defects in the prior art. According to a reasonable P / N ratio, the gas source and acid source are supplemented to achieve the best synergistic effect. At the same time, the surface of the flame retardant is modified to greatly reduce the interfacial tension, increase the compatibility, and reduce the effect of the flame retardant on the material itself. The influence of the index, the halogen-free polypropylene material of the present invention can effectively solve the problems of high pollution of the traditional triazine char-forming agent system, poor compatibility between the flame retardant and the matrix, and low flame retardant efficiency.

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