Nano inorganic composite fire-resisting agent for macromolecular material

Abstract

The present invention relates to a nano inorganic composite fire-retardant for macromolecular material. It is composed of nano aluminium hydroxide, nano structure modified aluminium hydroxide or nano magnesium hydroxide and micro-size magnesium hydroxide and auxiliary fire retardant, in which the average grain size of nano aluminium hydroxide is less than or equal to 100 nano, the average grain size of nano structure modified aluminium hydroxide is less than or equal to 150 nano, the average grain size of nano magnesium hydroxide is less than or equal to 100 nano, the average grain size of micro-size magnesium hydroxide is 1-10 microns, and the mass ratio of nano-size inorganic fire retardant and micro-size magnesium hydroxide is 80:20 to 10:90, and the mas ratio of nano-size inorganic fire-retardant and micro-size magnesium hydroxide and auxiliary fire retardant is 100:10 to 100:30. It can be used in the fire-retarding composite materials of PE, PP, ABS, nylon, PC, PVC, EVA and polyester, etc.

Description

technical field [0001] The invention relates to an inorganic composite flame retardant, which is composed of nanometer aluminum hydroxide, nanostructure modified aluminum hydroxide or nanometer magnesium hydroxide, micron magnesium hydroxide and auxiliary flame retardant, and the surface is modified by an organic modifier. properties, used in flame retardant polymer composites. technical background [0002] Inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide have the effects of flame retardancy and smoke suppression, and can avoid toxic fumes generated when halogen-containing flame-retardant polymer materials are burned. Alcoa Company of the United States produces an aluminum hydroxide flame retardant with a trade name of BAO and a particle size of 0.3-2.7 microns. The thermal decomposition temperature is above 350°C. It can be used for flame retardancy of polyethylene, polypropylene, ABS, polyvinyl chloride, EVA, and engineering plastics such as ...

AI Technical Summary

Problems solved by technology

[0005] Due to the low decomposition temperature of ordinary aluminum hydroxide, it has decomposed at the processing temperature of some plastics, so it cannot be applied to plastics processed by high temperature plasticization.

In addition, the particle size of ordinary aluminum hydroxide is micron-scale, and the particle size is relatively coarse, which will reduce the mechanical properties of plastic products while improving their flame retardancy.

Too much flame retardant will affect the performance of the material