The oxidative degradation of polymers as a result of formation of free radicals by heat, UV light or impurities is retarded to a great extent by the use of antioxidants. Polymers that are not stabilized against oxidation degrade, which is manifested by loss of mechanical properties due to decrease of molecular weight, discoloration and brittleness. Hindered phenols and aromatic amines are the so called primary antioxidants which by donation of reactive hydrogen to the peroxy radicals prevent further radical propagation.

Phostacon organophosphites such as triphenylphosphite (TPP) and trisnonylphenylphosphite (TNPP) belong to the group of secondary antioxidants. Their function is to decompose hydroperoxides to non reactive species and in this way to retard the oxidative degradation of polymers. Primary and secondary antioxidants alone, or in combination, maintain the performance integrity of polymers and improve their color and processing stability.

Phostacon DPDP CAS Number: 26544-23-0
Diphenyl isodecyl phosphite
, , , , ,
Phostacon EHDP CAS Number: 15647-08-2
Ethylhexyl diphenyl Phosphite
, , , , ,
Phostacon MK1500 CAS Number: 96152-48-6
Poly 4,4-isopropylidenediphenol C12-C15 Alcohol Phosphite
Phostacon ODPP CAS Number: 26401-27-4
Diphenyl isooctyl Phosphite
, , , , ,
Phostacon PDDP CAS Number: 25550-98-5
Phenyl diisodecyl phosphite
, , ,
Phostacon TDP CAS Number: 25448-25-3
Triisodecyl phosphite
, , , , ,
Phostacon THOP CAS Number: 80584-85-6
Tetraphenyl dipropyleneglycol diphosphite
, ,
Phostacon TLP CAS Number: 3076-63-9
Trilauryl Phosphite
, ,
Phostacon TNPP CAS Number: 26523-78-4
Trisnonylphenol phosphite
, , , , , , , , , , , , , , ,
Phostacon TPP CAS Number: 101-02-0
Triphenyl phosphite
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