Analysis of flame retardant polyamide reasonable choice use

PA is generally required to achieve fire-retardant UL94 V-0 grade, mainly used flame retardant, such as Deca-BDE, a brominated polystyrene (BPS), brominated epoxy resin (BER) and so on. Therefore, the choice of a flame retardant, flame retardants must be considered to be leaking from the PA is not easy, do not lead to system light resistance and impact strength of the material decreases.
 

In order to improve some of the shortcomings of the flame retardant, have synthesized new phosphine oxide reactive functional group-containing monomer, such as a triaryl phosphine oxide (TPO), and nylon 66 salt can be prepared by copolymerizing hexamethylene diamine chain containing TPO Winner nylon 66 copolymer. Such retardant PA is in the condensed phase and gas phase can play retardant performance, as flame retardant elements become part of the PA, so it has a lasting flame resistance. In addition, MCA (melaminecyanurate) as an additive flame retardant and red phosphorus compound is also frequently used in the PA retardant treatment, flame retardant can get better results.
 

Polyurethane itself is a strong polymer flammability. Polyurethane foam density, surface area, coupled with good insulation material itself, its combustion problem is more prominent, soft foam around 250-300 ℃ thermal decomposition to produce a variety of toxic and flammable gases. When the bubble burning, although most occur in the oxidation of hot melt polymer surface, but a lot of heat from the combustion of flammable gases. Once the ignition of flammable gas, the combustion process will be very rapid and accelerated, and the generation of large amounts of toxic fumes, but also hinder firefighting operations, therefore, difficult to put out the burning foam. Many applications of soft foam, such as mattresses, furniture and transportation, which have fire-retardant requirements. Today, Triethyl Phosphate flame resistance has become one of the main performance indicators soft foam products.
 

FR-V6 flame retardant foam for a soft effect:
Flexible polyurethane foam in the most widely used flame retardants often choose high molecular weight poly-chlorinated phosphate and polyphosphate. FR-V6 products are high molecular weight polyphosphate flame retardant, having good resistance to hydrolysis and strong permeability and low volatility, good flame persistence, consumable foam decomposition of combustible gases when burned, it transformed into a nonflammable carbide, for the above three functions fully in place, the practice shows that: FR-V6 product is currently blocked in the best conditions with soft polyurethane foam in use flame retardant

Soft foam flame retardant must have one or more of the following functions:
First, a biodegradable foam material can terminate radical oxidation reactions.
Second, the products of combustion can react with the foam is not flammable substances;
Third, the energy at or near the ignition temperature of the ignition temperature endothermic decomposition into a non-combustible material.