Nonylated diphenylamines
AssigneeCiba Specialty Chemicals Corporation
InventorsBeat Michael Aebli, Samuel Evans, Sandor Gati
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Abstract
The invention relates to a mixture of nonylated diphenylamines, especially dinonylated diphenylamines, and to a technically advantageous methodological process for the preparation of that mixture by using acid catalysts in small quantities. The mixture is used as an additive for stabilizing organic products that are subjected to oxidative, thermal and/or light-induced degradation.
Claims11
A mixture of diphenylamines consisting in the gas chromatogram essentially of a content of
- a) from 68.0% to 78.0% by area dinonyldiphenylamine;
- b) from 20.0 to 30.0% by area nonyldiphenylamine;
- c) from 1.0 to 3.5% by area trinonyldiphenylamine;
- and
- d) from 0.1 to 1.0% by area diphenylamine.
A process for the preparation of a mixture of nonylated diphenylamines consisting essentially of in a gas chromatogram
- a) from 68.0 to 78.0% by area dinonyldiphenylamine;
- b) from 20.0 to 30.0% by area nonyldiphenylamine;
- c) from 1.0 to 3.5% by area trinonyldiphenylamine;
- d) and from 0.1 to 1.0% by area diphenylamine which comprises alkylating diphenylamine with an excess of nonene or a mixture of isomeric nonenes in the presence of from 2.0 to 25.0% by weight, based on diphenylamine, of an acid clay and in the absence of inorganic or organic acids in the reaction mixture.
Dependencies are inferred from the claim text.