| abstract |
A compound of the formulan n wherein R 1 is phenyl; phenyl substituted with halogen, alkyl, NR 4 R 5 wherein R 4 and R 5 are the same or different and are hydrogen or alkyl; alkoxy, alkylthio, methylenedioxy, COOR 6 wherein R 6 is alkyl; or NHCOOR wherein R 7 is alkyl; R 2 and R 3 are the same or different and are alkyl, cycloalkyl or aralkyl, and R 2 plus R 3 are alkylene, oxydialkylene or thiodialkylene. n The compound is useful as a rubber curative and curable rubber compositions and methods for curing a rubber are disclosed. |