Functional group containing cyclic diolefin butyl rubbers
AssigneeExxon Research & Engineering Co.
InventorsKenneth W. Powers, Robert Roper, Martin L. Gorbaty
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Abstract
Isobutylene-based elastomers containing 3-15 mol percent enchained cyclic diolefin such as cyclopentadiene, and other comonomers such as isoprene, piperylene and butadiene to allow for chemical modification with anhydride, carboxy, hydroxy, etc. to produce a one package through cure system.
Claims7
A tack-free, air dryable, self-curing elastomeric terpolymer coating having a viscosity average molecular weight of about 15,000 to 80,000 which consists essentially of about 85 to 95 mol % isobutylene, about 5 to 9 mol % C.sub.5 -C.sub.12 cyclic diolefin and about 0.5 to 5 mol % conjugated diolefin represented by the formula ##STR6## where each R is are independently hydrogen or acyclic or alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms and wherein the terpolymer has attached thereto a functional group selected from the group consisting of anhydride, carboxy or hydroxy said coating being self-curing through surface oxidative crosslinking of said cyclic diolefin.
Dependencies are inferred from the claim text.