Preparation process for flame-retardant nylon resin

Abstract

The present invention relates to a preparation process of flame-retardant nylon resin. According to the present invention, decabromodiphenylethane and calcium hypophosphite are used as main flame retardants, and by compounding with NOR116, an efficient flame-retardant nylon 6 resin composition is obtained. The composition is good in bromine, phosphorus and nitrogen compatibility, high in thermal stability and good in hydrolysis resistance. As the adding amount of decabromodiphenylethane is significantly reduced and no antimony trioxide needs to be added, the smoke generation amount is greatly reduced while a good flame-retardant effect is still achieved. Besides, the flame-retardant nylon 6 resin provided by the present invention further has good ultraviolet resistance, so that the product is not easy to change color and is extremely high in thermal stability, and the processing requirements of various materials can be met.

Description

technical field [0001] The invention relates to a chemical preparation process of a flame-retardant nylon resin, in particular to a low-halogen high-efficiency flame-retardant nylon 6 resin compounded with NOR116 and a preparation method thereof. Background technique [0002] Polyamide is one of the four major engineering plastics, and it is a member that cannot be underestimated in today's life and economy in terms of application fields, consumption and transaction volume. Nylon 6, or polyamide 6, is the most common type of polyamide, and its demand for flame retardancy is particularly obvious. [0003] Traditional halogen-based flame retardants are widely used in the production of flame-retardant materials due to their high flame-retardant efficiency, but because halogen-based flame-retardant products produce a large amount of smoke and toxic corrosive gases during combustion, it hinders rescue and personnel evacuation , leading to secondary disasters. Therefore, the app...

AI Technical Summary

Problems solved by technology

[0003] Traditional halogen-based flame retardants are widely used in the production of flame-retardant materials due to their high flame-retardant efficiency, but because halogen-based flame-retardant products produce a large amount of smoke and toxic corrosive gases during combustion, it hinders rescue and personnel evacuation , leading to secondary disasters

Therefore, the application of halogen flame retardant products is limited

At present, compared with halogenated flame retardants, flame retardant products on the market have very different flame retardant effects. Usually, halogenated flame retardants require less than 5% to have excellent flame retardant effects, while many organic flame retardants even It needs to be added in an amount of more than 30% to have a flame retardant effect, and the price is much higher than that of halogenated flame retardants

In addition to the price factor, the negative impact of high addition is also extremely obvious. The processing performance, fluidity and mechanical properties of the material are greatly reduced due to the addition of a large amount of flame retardants. The compatibility of flame retardants in materials is poor, and it is easy to Precipitation, which further affects the flame retardant effect and mechanical effect, which is also the biggest problem of inorganic flame retardants

On the other hand, with the popularity of automation today, the requirements for halogen-free flame retardants in modern industry are relatively low, and the market still needs a large amount of halogen-based flame retardants to meet the needs of industries, etc. Many companies still completely rely on halogen flame retardant systems. For Environmental protection is clearly detrimental