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Phosphite Antioxidant
Phosphite Antioxidant

Phosphite Antioxidant

Phosphites are hydro peroxide scavenger called secondary antioxidants. They attack peroxides or hydro peroxides and neutralize them without any further damage to the polymer.

Polymers are melting during various stages of the process and are exposed to high temperatures and shear forces, which leads to a thermo oxidative decomposition, which even accelerates if final articles are exposed to high temperatures for a longer time. Process-, heat- and long term ageing stabilizers reduce the decomposition so that the mechanical properties of final article are protected.

Phosphites as process stabilizers give thermo stability to the melted polymer resulting in an efficient viscosity (MFI). Simultaneously they protect polymers against discoloration. Process stabilizers and long term ageing stabilizers are quite often used in a synergistic mixture.

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