Halogen-free flame retardant and flame-retardant resin composition with good flame retardance and processability

Abstract

The invention discloses a halogen-free flame retardant with good flame retardance and processability and a flame retardant resin composition. The halogen-free flame retardant with good flame retardance and processability is prepared from piperazine phosphate, melamine and derivatives thereof, a metal salt flame retardant synergist, a hyperdispersant, a low-melting-point lubricating flame retardantadditive and an organic sulfur-containing compound. The flame-retardant resin composition is composed of the halogen-free flame retardant with good flame retardance and processability and resin, andthe mass percent of the halogen-free flame retardant with good flame retardance and processability is 15-50%. The halogen-free flame retardant disclosed by the invention is excellent in flame retardance, relatively good in compatibility and dispersity in resin, smooth in surface of a flame-retardant product, free of white points and high in yield.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to a halogen-free flame retardant and a flame retardant resin composition with good flame retardancy and processability. Background technique [0002] In the research of halogen-free flame retardant and the development of polymer material products, piperazine phosphate flame retardants show high-efficiency flame retardant performance, among which piperazine pyrophosphate has high thermal stability and char formation performance, and has been widely used In the halogen-free flame retardant materials of polypropylene and glass fiber reinforced systems. A flame retardant synthetic resin composition disclosed in U.S. Patent No. 4,599,375 in 1986, which contains (a) synthetic resin, (b) piperazine pyrophosphate, (c) melamine pyrophosphate, (d) titanium dioxide or two silicon oxide. In many patents such as CN101827885A, CN109503941A, CN104119610A, CN105061887A, etc....

AI Technical Summary

Problems solved by technology

The above silicone oil treatment method improves the moisture absorption and agglomeration of piperazine pyrophosphate, and has good water resistance in a normal temperature environment, but the melting point of silicone oil itself is not high, and it is easy to soften again when heated, so that the modified product can withstand high temperature, high humidity and hot water. The water resistance becomes poor in the environment, and the powder is easy to agglomerate after long-term storage without isolation and dispersion treatment after silicone oil coating treatment

Patent CN111032829A uses aluminum oxide monohydrate to improve formability and anti-dripping, but the compatibility between inorganic powder and resin is poor, which deteriorates the mechanical properties of the material

Patent CN110079009A discloses the use of hyperdispersants, high aspect ratio fillers and nano fillers in the flame retardant system of piperazine pyrophosphate to obtain an ultra-high fluidity halogen-free flame retardant polypropylene material, but the processing uses two-stage side feeding The twin-screw extruder at the feed port has high requirements for processing equipment

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