Antioxidant compositions

Details Antioxidant compositions Antioxidant compositions

C - Chemistry, Metallurgy

08

K

400/7072, 31/76

C08K 5/34 (2006.01) C08K 5/3477 (2006.01) C08K 5/526 (2006.01)

Patent

CA 1203370

ABSTRACT OF THE DISCLOSURE Sterically hindered 4-substituted-2,6-di-t-butylphenyl bis (substituted phenyl)phosphites form effective and improved antioxidant combinations with hydroxyphenylalkyleneyl isocyanur- ates. These systems provide enhanced antioxidant activity in organic materials subject to degradation by heat and oxygen, and are especially effective in polymers such as the poly(olefins) represented by poly(propylene). The triphenyl phosphites are readily prepared by reacting a 2,6-di-t-butyl-4-substituted- phenylphosphorodichloridite with a sodium salt of a 2-t-butyl- substituted phenol.

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