Patents Assigned to Ciba Speciality Chemicals Corp.
  • Alkylated PANA and DPA compositions
    Patent number: 8030259
    Abstract: The invention relates to a composition comprising a mixture of alkylated N-?-naphthyl-Nphenylamine (PANA) and alkylated diphenylamine (DPA), the product obtainable by alkylating PANA or a mixture of PANA and DPA with alkenes and the process for alkylating PANA or a mixture of PANA and DPA with alkenes. The compositions according to the present invention have an outstanding anti-oxidative action, which can be demonstrated by established test methods.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: October 4, 2011
    Assignee: Ciba Speciality Chemicals Corp.
    Inventors: Beat Michael Aebli, Samuel Evans, Marc Ribeaud, David Eliezer Chasan