Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Solid hydrocarbon polymer
Reexamination Certificate
2005-04-07
2009-06-30
Mullis, Jeffrey C (Department: 1796)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Solid hydrocarbon polymer
C525S070000, C525S263000, C525S387000
Reexamination Certificate
active
07553802
ABSTRACT:
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.
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Mullis Jeffrey C
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Polimeri Europa S.p.A.
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