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Principle of flame retardant plastics flame retardants

1, produce a stifled the flame from gas. Such as antimony trioxide, when it encountered burn PVC produces HCL gas reacts with it to form a foam quenching, namely antimony oxides of nitrogen, and thus play a fire-retardant effect.

2, absorbing the heat generated during combustion, cooled, slowing combustion rates. Such as aluminum hydroxide, which contained chemical bond in a molecule of water as high as 34%, this combination of water in most plastics processing temperature is stable, but break down more than 200 ℃, releasing steam. And decompose a mole of aluminum hydroxide, to absorb the 36,000 calories.

3, to provide an isolated isolation with oxygen layer, cut off from oxygen and self-extinguishing, such as phosphate ester flame retardant generated during combustion of phosphorus compounds is the layer of oxygen.

4, generate free radicals can react with plastic, and their reaction products with plastic have flame-retardant effect.

Also known as a flame retardant, fire and fire agents: give flammable polymers flame retardant functional additives application into additive flame retardant and reactive flame retardant agent. According to composition, additive flame retardants include inorganic flame retardant, halogen-free flame retardant agent (organic organic bromides and chlorides), phosphorus-based flame retardants (red phosphorus, phosphates and phosphoric acid esters, etc) and nitrogen flame retardant agent.