Expansion of capacity Demand for butyl rubber in China has grown rapidly in recent years.The apparent consumption of butyl rubber was 67 000 tons in 2002 and reached 214 000 tons in 2007.The average annual demand growth was 26.1% from 2002 to 2007.The output of butyl rubberin Sinopec Beijing Yanhua Petrochemical Expansion of capacity Demand for butyl rubber in China has grown rapidly in recent years. The apparent consumption of butyl rubber was 67 000 tons in 2002 and reached 214 000 tons in 2007. The average annual demand growth was 26.1% from 2002 to 2007. output of butyl rubberin Sinopec Beijing Yanhua Petrochemical