ANTIOXIDANT COMPOSITIONS OF OCTYLATED DIPHENYLAMINES AND METHOD OF THEIR PREPARATION

摘要

Antioxidant compositions of octylated diphenylamines, containing 65 to 98% by weight of dioctyldiphenylamine, up to 29 % by weight of monooctyldiphenylamine, up to 5 % by weight of octylbutyldiphenylamine, up to 1.5 % by weight of trioctyldiphenylamine and up to 1 % by weight of diphenylamine, are prepared by alkylation of diphenylamine by diisobutylene in the presence of an acidic catalyst. They can be used as efficient stabilizers of polymeric materials, lubricants and oils, either alone or as a component of anti-degradation systems and substances based on them.