| 摘要 |
1517461 Amine antioxidants for rubbers IMPERIAL CHEMICAL INDUSTRIES Ltd 8 March 1977 [12 March 1976] 9990/76 Heading C3K [Also in Division C2] Natural and synthetic rubbers contain as antioxidant a compound of formula wherein each R1 is alkyl, alkenyl or cycloalkyl and each R2 is an aromatic group. The groups R2 can be substituted by halogen, alkoxy, alkyl, alkylamino, dialkyl amino and hydroxyl. |
