Efficient halogen-free flame retardant master batches special for polypropylene as well as preparation method and application of efficient halogen-free flame retardant master batches

Abstract

The invention provides efficient halogen-free flame retardant master batches special for polypropylene. The efficient halogen-free flame retardant master batches consist of the following raw materials in percentage by weight: 30-40% of ammonium polyphosphate, 10-20% of pentaerythritol octahydrogen tetraphosphate, 15-25% of melamine, 5-15% of bisphenol-A bis(diphenyl phosphate), 10-30% of microporous polypropylene, 0.1-1% of pentaerythritol stearate, 0.1-0.5% of an antioxidant 1010 and 0.1-0.5% of an antioxidant 168, wherein the microporous polypropylene is a particle with the size of 3-5mm, the size of cells on surfaces of the particles is 10-100 microns, and the cell density is more than 10<5> / cm<3>. The efficient halogen-free flame retardant master batches special for polypropylene have the characteristics of easy dispersing, easy processing, high flame-retardant efficiency and low production cost, and can be widely applied to production of a flame-retardant polypropylene material for extrusion molding, injection molding and membrane blowing.

Description

technical field [0001] The invention belongs to the field of preparation of flame retardant masterbatch materials, and more specifically relates to a special high-efficiency halogen-free flame retardant masterbatch for polypropylene and its preparation method and application. 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 indep...

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Problems solved by technology

[0004] Since this phosphorus-nitrogen flame retardant is generally powder, and its fineness is generally above 400 mesh, it is easy to generate a large amount of dust pollution during the process of weighing, mixing, and granulation, which will deteriorate the production environment and cause harm to human health. Very harmful, and will cause a certain degree of wear and tear on processing equipment

Moreover, phosphorus-nitrogen flame retardants have the problems of strong hygroscopicity, low thermal stability, and poor compatibility with polyolefin resins, resulting in flame-retardant materials being sensitive to moisture, easy to foam and degrade, and flame-retardant. The dispersibility of the agent in the resin is poor and the processing performance and physical and mechanical properties of the material are damaged to a certain extent.

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