Red phosphorus flame-retardant enhanced thermoplastic polyamide composition

Abstract

The invention discloses a red phosphorus flame retardation reinforced thermoplastic polyamide compound. The red phosphorus flame retardation reinforced thermoplastic polyamide compound comprises the following components by weight percentage: (1) 30 to 90 percent of thermoplastic polyamide resin; (2) 1 to 30 percent of red phosphorus which receives micro-encapsulation cladding treatment; (3) 10 to 50 percent of fiber reinforced material; and (4) 0 to 25 percent of additive. The red phosphorus flame retardation reinforced thermoplastic polyamide compound comprises an inorganic-organic composite cladding system; in addition, a thermosetting cladding system and a thermoplastic cladding system are used together in the organic cladding system; and the thermoplastic polymer introduced into the cladding system has good functions of interface compatibility and lubrication so as to prevent the clad red phosphorus from being damaged by the high temperature and strong shearing action in a screw extruder. The compound can serve as the thermoplastic red phosphorus flame retardation polyamide with industrial application value and can be successfully applied to the trades of electrical engineering, electronics, electric appliances, and the like.

Description

technical field [0001] The present invention relates to a thermoplastic polyamide composition. Background technique [0002] In flame-retardant materials and flame-retardant products, halogen-free has become the general trend. Red phosphorus has high flame retardant efficiency because it only contains the flame retardant element phosphorus. On the other hand, red phosphorus flame-retardant nylon has a high CTI value and good mechanical properties, and has good applicability in unreinforced and glass fiber reinforced nylon. Therefore, red phosphorus flame retardant nylon is widely used in electronics, electrical, electrician and other industries. [0003] Red phosphorus powder is an amorphous dark red inorganic polymer with a low ignition point of only 250°C; strong hygroscopicity, it will react chemically on the surface of red phosphorus in a humid environment or under processing conditions to produce various These phosphorus oxides and phosphine compounds further react w...

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Problems solved by technology

However, when such a stable system is used, magnesium hydroxide, aluminum hydroxide, etc. will release water during high-temperature decomposition, which may further intensify the reaction between red phosphorus and water, and make the stabilized red phosphorus invalid during high-temperature extrusion.

[0009] The above invention is very effective for stabilizing red phosphorus powder, but in the composite system of thermoplastic polyamide and glass fiber, the cladding layer of red phosphorus particles will be destroyed under high temperature and strong shearing. Or partially destroyed, resulting in the red phosphorus particles are still exposed, and will still deteriorate during processing and use, which is limited in practical application

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