Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2011-01-11
2011-01-11
Lipman, Bernard (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
active
07868100
ABSTRACT:
A halogenated butyl polymer having improved properties, the butyl polymer derived from a monomer mixture comprising a C4to C8monoolefin monomer, a C4to C14multiolefin monomer and a styrenic monomer with a catalyst system to produce the butyl polymer. The improved properties include faster cure, higher maximum torque, higher delta torque, relatively stable modulus over time, improved hot air aging properties and improved aged flexure properties. These improved properties are believed to result from direct interaction between the styrenic moieties in the polymer backbone with a crosslinking agent added to vulcanize the halogenated butyl rubber.
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Marchionna, F. Recent Advances in Butallistic Polymers (1954), vol. 1, p. 444-445.
LANXESS Inc.
Lipman Bernard
Miller Michael A.
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