The Vulcanization System For Bromobutyl Based Tire Innerliner Compounds

The halobutyl innerliner compound used in radial tires has a vulcanization system consisting of zinc oxide, stearic acid, sulfur, and MBTS. Such vulcanization systems, though relatively simple are different from other tire compound cure systems in that innerliner compounds use lower zinc oxide levels, sulfenamide accelerators, binary accelerator systems and organic retarders are seldom used.

 The study wishes to describe the role of the components constituting the vulcanization system in a bromobutyl rubber based tire innerliner compound, specifically the effect of zinc oxide, stearic acid, and MBTS.

 This second paper on the structure and architecture of tire halobutyl innerliner compounds wishes to provide fundamental information on formulation vulcanization system additives needed to ensure the bromobutyl or chlorobutyl rubber compound will meet required processing and final mechanical properties. This will help ensure the tire or industrial products using these polymers meet durability and performance parameters that are required.