Preparation method of nylon/montmorillonoid fire retarding composite material

Abstract

This invention provides a preparation of a nylon / montmorillonite flame retardant composite. First silicone oil is added in solvent and stirred to be uniformity, then montmorillonite is used for reshaping, then the silicone oil is used for the reshaping of organic and montmorillonite nylon, at last, the mixture of flame retardant is putted into Co-Rotating Twin Screw Extruder for extruding and palletizing. Nylon, organic montmorillonite, silicone oil and flame retardant can also be pre-mixed directly, and then the mixture is putted into Co-Rotating Twin Screw Extruder for extruding and palletizing. The emargination impact strength of this composite is improved, and the limit oxygen index is improved by great extent.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer / montmorillonite composite materials, and in particular relates to a new method for preparing flame-retardant composite materials by using modified organic montmorillonite and nylon. Background technique [0002] Nylon not only has excellent mechanical properties, but also has good self-lubrication and chemical corrosion resistance, so it is an engineering plastic with a wide range of applications. However, nylon also has high water absorption, low heat distortion temperature, and low modulus. Low, relatively easy to burn and other issues, so it also limits its application to a certain extent. [0003] In order to solve these problems of nylon itself, nylon / montmorillonite nanocomposites were prepared by filling nylon with organic montmorillonite by melt intercalation method. Although the tensile strength of the nanocomposite is greatly improved, the notched impact strength is affec...

AI Technical Summary

Problems solved by technology

However, the addition of halogenated flame retardants, although high in flame retardant efficiency, pollutes the environment and releases harmful gases during combustion, so its application has been limited; red phosphorus has high flame retardant efficiency, but it also pollutes the environment and toxic gas release problems, and its darker color also limits its application

In addition to red phosphorus, phosphorus, nitrogen, and inorganic flame retardants have low toxicity, but they require a large amount of addition to achieve a good flame retardant effect, which greatly affects the mechanical strength and other performance of the composite material. (Sergei V Levchik and Edward D Weil. Combustion and fire retardancy of aliphatic nylons. Polymer ntemational 49: 1033-1073 (2000))