Production method of ethylene-propylene rubber
Solution polymerization is a homogeneous reaction carried out in a solvent that can dissolve both the product and the monomer and catalyst system, usually with linear alkanes as the solvent (such as n-hexane). At present, the solution polymerization method is the main production method of ethylene-propylene rubber, and it is the method adopted by most foreign manufacturers. Industrialized solution polymerization mainly includes low temperature solution polymerization of Ziegler-Natta series catalysts and high temperature solution polymerization technology of metallocene series catalysts. Vanadium catalytic system solution process ethylene-propylene rubber has the largest output, the largest number of product brands and strong market adaptability, and its output accounts for about 80% of the world's ethylene-propylene rubber output.
Suspension polymerization does not add a solvent, propylene is not only a reaction monomer, but also a suspension medium. Because the ethylene-propylene rubber product is insoluble in propylene and suspended in it, it becomes a polymer liquid propylene slurry.
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