Flame retardant rubber grommets
With the exception of a few synthetic rubbers, natural rubber and most synthetic rubbers are flammable or combustible materials, especially natural rubber and hydrocarbon synthetic rubber. Rubber grommets made of these rubber materials are also flammable or flammable, and generate a large amount of heat when burned, and the flame spreads quickly, and releases a large amount of smoke or irritating, corrosive, and toxic gases. Therefore, how to make flammable rubber grommets become flame retardant, low smoke, and low toxicity has become a topic of research at home and abroad in recent years. There are many methods for making the rubber material flame retardant, and a relatively simple, economical and effective method is to add a flame retardant to the rubber material.
Classification of rubber grommets flame retardants
The term “flame retardant” refers to a compounding agent that can protect the material from ignition or spread the flame. Among the terpolymer materials, the substances capable of playing a flame retardant are mainly the halogens of Groups VA of Groups VA, N, P, As, Sb, Bi and Group VIIA, and Al, B, Zr, Sn, Mo. , Mg, Ca, Si, etc. Among them, compounds of N, P, Sb, Cl, Br, B, A1 and Mg are more commonly used. Flame retardants are generally classified into two types, reactive and additive, in addition to smoking suppressants and toxic gas scavengers.
Reactive flame retardant: Reactive p-phenylene containing compound
Additive flame retardant: red phosphorus, aluminum hydroxide, magnesium hydroxide, etc.
Smoke suppressant: asbestos, fiberglass, etc.
The reactive flame retardant mainly participates in the reaction during polymerization or polycondensation, and is incorporated into the main chain or side chain of the high polymer to serve as a flame retardant. These flame retardants have the characteristics of good stability, non-disappearance, and little influence on polymer properties, but they are complicated to manufacture and have not been widely used in rubber grommets. The additive type flame retardant is an additive added to the high polymer, and is dispersed in the cerium polymer to exert a flame retarding effect.