Functional masterbatch of halogen-free intumescent flame retardant, and preparation method thereof

Abstract

The invention relates to functional masterbatch of a halogen-free intumescent flame retardant, and a preparation method thereof. The halogen-free intumescent flame retardant in the functional masterbatch is a phosphorus-nitrogen series intumescent flame retardant, and a matrix in the functional masterbatch is a polyolefin resin. The functional masterbatch comprises, by weight, 50-90 parts of the halogen-free intumescent flame retardant, 20-45 parts of the polyolefin resin, 1-5 parts of a compatibilizer; 1-5 parts of a lubricant and 1-5 parts of a surface treatment agent. According to the present invention, dust pollution due to the flame retardant is fundamentally overcome; the flame-retardant masterbatch and polypropylene have good dispersions, such that purposes of environmental protection and no pollution are achieved; heavy metal contents of the functional masterbatch accord with requirements of the report of societe generale de surveillance S.A. (SGS); and the functional masterbatch has a good flame retardant property and high economy.

Description

1. Technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a functional masterbatch of a halogen-free expansion flame retardant and a preparation method thereof. 2. Background technology [0002] Halogen-free intumescent flame retardants are all added to the plastic matrix in a powder state. When the amount added is small, measurement errors are bound to occur; and when the amount is large, it will cause dust to fly and deteriorate the production and operating conditions. Many plastics are sold in the form of pellets. Mixing the two is not easy to disperse, which will inevitably bring difficulties to molding and even affect product quality. [0003] Flame retardant masterbatches are made from a super-normal amount of flame retardant, dispersant and carrier resin, etc., through dispersion, mixing, plasticization, and granulation. In terms of the concentration of additives in plastic products, masterbatches are t...

AI Technical Summary

Problems solved by technology

[0004] There are also many patents on the preparation of flame-retardant masterbatches, but most of them are halogen-containing flame-retardant masterbatches, such as antimony trioxide-based flame-retardant masterbatches, such as CN200610012872.5, CN200710027466.0 are antimony-based flame-retardant masterbatches agent, causing great pollution to the environment

However, the current halogen-free flame retardant masterbatch is usually based on polyethylene, which may affect the performance of polypropylene resin PP flame retardant, and the content of flame retardant is low, which often fails to achieve flame retardant The effect of resin