High temperature-resistant halogen-free flame retardant PBT (polybutylece terephthalate) material and preparation method thereof

Abstract

The invention relates to the technical field of PBT modification, and especially relates to a high temperature-resistant halogen-free flame retardant PBT material and a preparation method thereof. Substances used in the invention, such as phenyl aluminum hypophosphite, nano calcium carbonate, ground calcium carbonate, substituted aryl phosphate salt and pentaerythritol stearate, all have the function of nucleating agent, so that crystal structure of PBT is completed, degree of crystallinity of PBT is increased, and mechanical property and high temperature resistance of PBT are improved. According to the invention, a hypophosphite type inorganic halogen-free flame retardant, as the phenyl aluminum hypophosphite, is used, and the flame retardant plays its function of nucleating agent while retarding flaming, which is beneficial for improvement of mechanical property and heat resistance; phenyl aluminum hypophosphite and antimonous oxide are used in compounded form, so that generation and accumulation of free carbon are reduced, and flame retardance of PBT is enhanced. In a word, by a complete formula system, the produced product has good high temperature resistance, flame retardance and mechanical property. The PBT material can be produced by simple technology, and is low-cost.

Description

technical field [0001] The invention relates to the technical field of PBT modification, in particular to a high-temperature-resistant halogen-free flame-retardant PBT material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PBT) has the characteristics of low price, excellent processing performance, mechanical properties, heat aging resistance, solvent resistance, water stability, electrical properties, etc. Therefore, in the 1960s Then began the application development as engineering plastics. At present, PBT engineering plastics have been used in industries such as automobiles, electrical machinery, electronics, household appliances and machinery. [0003] In traditional PBT plastic engineering, due to the poor flame retardancy of PBT, it is necessary to add flame retardants to enhance its flame retardancy. Halogen-containing polymers or flame-retardant mixtures combined with halogen-containing flame retardants have excellent ...

AI Technical Summary

Problems solved by technology

However, when a fire occurs, such halogen-containing flame-retardant materials will produce a large amount of smoke and toxic corrosive hydrogen halide gas, causing secondary hazards.

The new halogen-free flame retardant system is mainly based on phosphorus compounds and metal hydroxides. Although it has a small amount of smoke when it burns and does not produce toxic and corrosive gases, it has poor high temperature resistance, poor mechanical properties, and poor flame retardancy. sexual inadequacy