Application of Iron Oxides in Eliminating Irritating Odor in Red Phosphorus Flame Retardant Nylon

Abstract

The invention discloses an application of an iron oxide in elimination of irritating odor in red phosphorus flame retardant nylon. The iron oxide is a mixed active iron oxide of ferroferric oxide and ferric oxide, by calculating according to 100 parts by weight of nylon, the adding quantity of red phosphorus is 10 parts by weight, the adding quantity of the iron oxide is 1-5 parts by weight, and when the three, namely nylon, a red phosphorus flame retardant and a deodorant, are uniformly mixed, a twin-screw extrusion granulation way or a banburying way through a banburying machine can be adopted and blending is performed at blending temperature which is generally used for nylon material. According to the technical scheme disclosed by the invention, the iron oxide is added as the deodorant on the premise of not losing the flame retardance of the red phosphorus flame retardant against the nylon material and mechanical properties thereof, the release of phosphine into environmental space can be prevented in the thermoforming process of the red phosphorus flame retardant nylon material, the resulted irritating peculiar odor can be eliminated and the healthy and environment-friendly requirements can be further met.

Description

technical field [0001] The invention belongs to the field of material processing, and more specifically relates to a method for using iron oxides that can weaken or even eliminate red phosphorus flame-retardant nylon materials (such as nylon 6) that produce pungent odors during high-temperature processing. Background technique [0002] Nylon materials are widely used in various fields due to their excellent electrical properties, mechanical properties, heat resistance, toughness, wear resistance, oil resistance, self-lubrication, and chemical resistance. Unmodified nylon has poor flame retardancy. Its vertical combustion can only reach UL94V-2 level, its oxygen index is about 24, and it will drip during combustion. It is a flammable material and is very easy to burn during use Start a fire. Especially in the field of electronic products, countless fires have been caused by nylon, causing great losses. Therefore, the flame-retardant modification of nylon has become a common ...

AI Technical Summary

Problems solved by technology

[0004] Red phosphorus is a cheap and easy-to-obtain flame retardant, which has high flame retardant efficiency and can improve the arc resistance of products. However, there are two problems in the use of red phosphorus flame retardant in nylon: 1. On the one hand, there are limitations in storage and color, that is, fire safety issues in storage and transportation and the color of the product are limited by the color of red phosphorus itself; on the other hand, nylon materials produced with red phosphorus as a flame retardant There will be a lot of peculiar smell during the production process and the use process, which will cause the air quality in the limited space to deteriorate and affect the physical and mental health of the production personnel and users

Based on the formation and release of phosphine to prevent its formation reaction from occurring, thereby avoiding the generation of phosphine or blocking its spread into the space, so as to completely solve the problem of odor, it should be the red phosphorus flame-retardant nylon material. An important pathway of the odor problem, but there are few relevant literature reports in this area

Images