A kind of halogen-free flame retardant for PA66 and environment-friendly flame-retardant PA66 material prepared therefrom

Abstract

The invention provides a halogen-free flame retardant for PA66. Sodium bicarbonate is added into the flame retardant, carbon dioxide gas can be decomposed in the PA66 material under high-temperature conditions, and a tiny air chamber is formed through expansion. The carbon dioxide gas and nitrogen can be stored in the air chamber until the air chamber is broken due to combustion, the gases are released, and combustion is inhibited. Therefore, a phenomenon that the flame retardant property of the PA66 material is reduced due to too quick release of the nitrogen can be avoided. Because melamine cyanurate can be stored in the air chamber and does not escape, the addition amount of the melamine cyanurate in the PA66 material is reduced, so that the production cost is reduced. The environment-friendly flame-retardant PA66 material provided by the invention is small in flame retardant amount, and the mechanical property and processability of the PA66 material are not influenced by the flame retardant. Because the adopted flame retardant is the halogen-free flame retardant, the PA66 material has obvious environment-friendly advantages, is high in environmental compatibility and is particularly applied to the production fields of automotive trim, aircraft interior and house furnishing materials.

Description

technical field [0001] The invention relates to the technical field of polymer resin materials, in particular to a halogen-free flame retardant for PA66 and an environmentally friendly flame-retardant PA66 material prepared therefrom. Background technique [0002] PA66 (Nylon 66) is one of the most widely used engineering plastics at present, with good mechanical strength, wear resistance, moist type, corrosion resistance and molding processability. However, the limiting oxygen index of PA66 is only about 22%. At the same time, when it is heated and burned, it is particularly prone to droplet phenomenon, thereby igniting other combustibles. The flame retardancy cannot meet the requirements of some industries, which limits its wider application. application. At present, the flame-retardant glass fiber reinforced PA66 used in industry is mainly added with halogen-based flame retardants such as decabromodiphenyl ether and brominated epoxy resin, and halogen-free flame retardan...

AI Technical Summary

Problems solved by technology

As we all know, the flame-retardant materials of halogenated flame retardants will produce a large amount of toxic and corrosive smoke and other harmful gases when burned, which will pollute and corrode the environment and molds, and have been banned in many developed countries; Although halogenated flame retardants are effective, they are difficult to promote and use in China due to their high cost

In addition, the use of certain halogen-free flame retardants may lead to a decrease in the mechanical properties and processing properties of PA66 materials, such as red phosphorus, magnesium hydroxide, etc.