Special halogen-free flame-retardant master batch for polypropylene and preparation method for halogen-free flame retardant master batch

Abstract

The invention discloses a special halogen-free flame-retardant master batch for polypropylene and a preparation method for the halogen-free flame retardant master batch. Components of the master batch comprise, in mass percent, 75-90% of phosphorus-nitrogen halogen-free flame retardant, 8-22% of carrier and 0.1-5% of modified ethylene bis-fatty acid amide. By the aid of the master batch, quality instability of materials due to non-uniform mixing of powder and granules is effectively avoided, easiness in generation of chippings or powder during granule cutting is avoided, production efficiency is improved, and production cost is lowered. Adopting a continuous banburying-extrusion production process leads production efficiency to be high. The master batch effectively solves the problems of easiness in moisture absorption, degradation and foaming of halogen-free flame retardant, so that storage time of the phosphorus-nitrogen halogen-free flame retardant is prolonged, and processability of the phosphorus-nitrogen halogen-free flame retardant is improved. Besides, the special halogen-free flame-retardant master batch for the polypropylene has the advantages of easiness in dispersion, high flame-retardant efficiency and low production cost, and has less influence on physical and mechanical properties, heat resistance, processability and surface color of composite materials than a special traditional halogen-free flame-retardant master batch for polypropylene.

Description

technical field

[0001] The invention discloses a preparation method of a non-halogen flame retardant masterbatch specially used for polypropylene. Background technique

[0002] Flame retardant masterbatch is also called flame retardant masterbatch and fireproof masterbatch. It is called "concentrate" abroad, which means the concentration of flame retardants. Flame retardant masterbatch has been produced for decades. At first, it mainly solved the problems of uneven dispersion and serious dust pollution during the use of flame retardant powder. After years of development, a large number of scientific methods and the application of new technologies, people The research on flame retardant masterbatch is not limited to conventional issues such as dispersion and pollution prevention. It has formed an independent discipline and developed into an independent industry. A large number of technical research and application have made flame retardant masterbatch a high-tech and high-...

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