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AssigneePolimeri Europa S.p.A.
InventorTiziano Tanaglia
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A process is described to modify the rheology of EP(D)M copolymers optionally mixed with polyalpha-olefins, which comprises treating in high shear conditions a polymeric mixture comprising one or more EP(D)M polymers, optionally mixed with polyalpha-olefins, in presence of one or more vinyl multifunctional monomers and of one or more hydroperoxides, with the amount of vinyl multifunctional monomer comprised between 0.02 and 2.0 by weight, preferably between 0.05 and 1% by weight, with the molar ratio between the vinyl monomer and hydroperoxide being comprised between 0.005/1 and 2/1, preferably between 0.01/1 and 1/1, said process being performed at a temperature between 75° C. and 260° C., preferably between 140° C. and 210° C.
A process to modify the rheology of EP(D)M polymers optionally mixed with polyalpha-olefins, that comprises treating, in conditions of high shear, a polymer mixture comprising one or more EP(D)M polymers, optionally mixed with polyalpha-olefins, in presence of one or more polifunctional vinyl monomers and of one or more hydroperoxides, the polifunctional vinyl monomer amount being from 0.02 to 2% weight, the molar ratio between vinyl monomer and hydroperoxide being from 0.005/1 to 2/1 molar, said process being carried out at a temperature from 75° C. to 260° C.
Dependencies are inferred from the claim text.