Flame retardant polyamide
1 For flame retardant PA, it is generally required to reach UL94V0 grade, mainly using added flame retardants, such as decabromodiphenyl ether, brominated polystyrene (BPS), brominated epoxy resin (BER) and the like. When selecting a flame retardant, it must be considered that the flame retardant should not easily bleed out from the PA, and the light resistance of the system and the impact strength of the material should not be lowered.
2 In order to improve some of the shortcomings of additive flame retardants, some new reactive functional group-containing phosphine oxide monomers, such as triarylphosphine oxide (TPO), have been synthesized, and copolymerized with nylon 66 salt and hexamethylenediamine to obtain a main chain. Nylon 66 copolymer of TPO. This kind of flame retardant PA can exert flame retardant performance in both the condensed phase and the gas phase, and since the flame retardant element becomes a part of the flame retardant PA, it has long-lasting flame retardancy.
3 Another MCA (melamine cyanurate) as an additive flame retardant and red phosphorus compounding is also frequently used in PA flame retardant treatment, and can also obtain a desired flame retardant effect.
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