Modified polycaprolactam and preparation method thereof

Abstract

The invention relates to modified polycaprolactam and a preparation method thereof. The modified polycaprolactam is composed of the components of, by weight: 68-77% of polycaprolactam, 4-6% of red phosphorus, 13-15% of decabromodiphenylethane, 3-5% of melamine phosphate, 1-2% of an enhancer, 1-2% of a flow modifier, 0.5-1% of an antioxidant, and 0.5-1% of a lubricant. According to the invention, a phosphorus-series flame-retardant, a nitrogen-series flame retardant and a halogen-series flame-retardant are composed, such that a maximal synergetic effect of the flame-retardants is developed. A flame-retarding effect of nylon products is greatly improved, and dose of flame-retardant can be reduced, such that cost is reduced. Also, compatibility between the flame-retardant and resin is improved, such that a synergetic effect of flame-retardant is optimized.

Description

technical field [0001] The invention relates to a modified composite material of high molecular polymer, more specifically, the invention relates to a modified polycaprolactam composite material. In addition, the invention also relates to a method for preparing the modified polycaprolactam. Background technique [0002] With the development of society, consumers and manufacturers pay more and more attention to the fire protection requirements of daily necessities such as electronic appliances. Unmodified nylon has poor flame retardancy, its vertical combustion can only reach UL94 V-2 level, its oxygen index is about 24, and it will drip during combustion. It is easy to cause fire, and the vertical combustion of modified nylon can reach V-0 level, which greatly improves its fire safety on finished products. 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...

AI Technical Summary

Problems solved by technology

According to relevant statistical data, tragic events caused by smoke accounted for more than one-third of the total death toll in fires. There are many types of flame retardants that can be used for polycaprolactam fibers, but they are generally single additions. Although It can improve the flame retardancy of polycaprolactam fiber, but the flame retardant effect is not particularly ideal. In addition, the addition of flame retardant is relatively large, which has a certain impact on other properties of polycaprolactam fiber, such as affecting its fluidity, plasticity, etc.