Composite flame retardant for low-density polyethylene

Abstract

The invention discloses a composite flame retardant for low-density polyethylene. The composite flame retardant is prepared from the following raw materials in parts by weight: 12-17 parts of antimonytrioxide, 37-50 parts of decabromodiphenyl ethane and 33-50 parts of titanate coupling agent NDZ-201 (modified bentonite). A preparation method of the titanate coupling agent NDZ-201 (modified bentonite) comprises the following steps of: according to the weight parts, adding 20 parts of sodium-based bentonite into distilled water, wherein the liquid-solid ratio is 20-30; rising the temperature to80-100 DEG C, then stirring and dispersing uniformly, adding 0.8-1.2 parts of titanate coupling agent NDZ-201, stirring for 100-140 minutes at constant temperature, after reaction is ended, filteringwhile being hot, placing in a drying oven to dry at temperature of 95 DEG C, cooling, crushing, treating by a 200-mesh sieve, and obtaining the titanate coupling agent NDZ-201 (modified bentonite). The composite flame retardant disclosed by the invention has the beneficial effects that under the condition guaranteeing the tensile strength and the impact strength of a low-density polyethylene substrate, the problems of serious melt dripping and large smoke generation amount when in burning of the low-density polyethylene are solved.

Description

technical field [0001] The invention belongs to the technical field of composite flame retardants, and in particular relates to a flame retardant for low-density polyethylene. Background technique [0002] Polyethylene is one of the five major synthetic resins, and it is the variety with the largest production capacity and the largest import volume among synthetic resins in my country. Polyethylene is mainly divided into three categories: linear low-density polyethylene, low-density polyethylene, and high-density polyethylene. Mainly used in various injection molding and blow molding products, pipes and wires, insulation and sheathing of cables, etc. Polyethylene is the most used engineering plastic in the world. It is extremely flammable. Its oxygen index is only 17.4%. When it is burned, it melts and drips heavily and produces a lot of smoke. Therefore, it is necessary to modify it with flame retardancy. Patent application number 201410610030.4 is a flame retardant for h...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a composite flame retardant for low-density polyethylene, which solves the problem of severe melt dripping and smoke generation when the low-density polyethylene is burned while ensuring the tensile strength and impact strength of the low-density polyethylene substrate. volume problem