Polypropylene shouting: halogen flame retardant "forced to close wheat", who can top it?

Among the four most widely used general-purpose thermoplastic resins - polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP) and polystyrene (PS), the proportion of PP has been increasing

This is due to the relatively special molecular structure of PP which is different from other materials.

From some perspectives, PP can be modified to achieve the properties of a variety of polymers.

Preparation of polypropylene

The preparation of PP takes propylene as raw material and ethylene as comonomer through polyaddition reaction

Introduction of common flame retardants for polypropylene

The flame retardant solution of PP is generally an external flame retardant or chemical modification (intrinsic flame retardant), but the intrinsic flame retardant method usually reduces the stability of PP, so the flame retardant of PP is more or an external flame retardant ( FR) method to achieve

Halogen flame retardant

As an important member of organic flame retardants, the use of halogenated flame retardants in polymer materials can be traced back to the 1930s

Phosphorus/Nitrogen Flame Retardant

The market demand of phosphorus/nitrogen-containing flame retardants is second only to halogen-based flame retardants.

The flame retardant mechanism of nitrogen-containing flame retardants is to decompose incombustible gases such as N2 and NH3 after being heated.

Intumescent flame retardant

Intumescent flame retardants are widely used in polymers, and they are also high-quality flame retardants that are given high expectations under the background of the gradual elimination of halogen-based flame retardants

Metal hydroxide flame retardant

Inorganic metal hydroxide flame retardants mainly include Mg(OH)2, AI(OH)3, etc.