Vulcanization accelerators
View Patent ↗The present invention relates to vulcanization accelerators constituted by compounds, derived from secondary amines, belonging to the class of enamines and to a process for their preparation.
1. A method of accelerating the vulcanization of rubber, comprising:
adding to a rubber an enamine of formula (II) as a vulcanization accelerator to form a mixture:
wherein said rubber vulcanizes faster with said enamine than without said enamine.
2. The method of claim 1 , wherein said rubber is a synthetic rubber.
3. The method of claim 1 , wherein said rubber is a natural rubber.
4. The method of claim 1 , wherein said rubber is a synthetic rubber selected from the group consisting of SBR, NBR, BR and EPDM.
5. The method of claim 1 , wherein said enamine is the only vulcanization accelerator.
6. The method of claim 1 , wherein said mixture further comprises a second vulcanization accelerator.
7. The method of claim 6 , wherein said second vulcanization accelerator is a mercaptobenzothiazole sulfonamide.