摘要
The capacity and the production technologyof ethylene propylene diene monomerrubber (EPDM or EPR) in the world arecontrolled by a few large multinationals. Thecombined capacity of five leading companiesincluding DSM of the Netherlands,DuPont Dow Elastomer LLC andExxonMobil Corporation of the UnitedStates,Bayer Group of Germany and
