| abstract |
1377195 Amines CIBA-GEIGY AG 13 Oct 1972 [16 Oct 1971] 48237/71 Heading C2C [Also in Division C5] Antioxidant compositions are prepared by thermally rearranging, by heating in a non- oxidizing atmosphere, a compound of the formula where A, B, C and D are phenyl groups which may be substituted by one or more C 1 to C 12 alkyl groups or with one or more aralkyl or 1- alkyl cycloalkyl groups, and combining the rearrangement product with an alkali metal salt, amide, hydroxide or peroxide. |