Low temperature synthetic rubber and method of making same
AssigneeThe B. F. Goodrich Company
InventorRobert J. Slocombe
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Abstract
Butadiene or isoprene are polymerized in the presence of a catalyst prepared by the interaction of (a) an aluminum compound of the general formula R.sub.2 AlX wherein R is an alkyl, cycloalkyl or aryl radical and X is hydrogen, halogen, or an alkyl, cycloalkyl or aryl radical, with (b) a metal halide selected from the group consisting of the chlorides, bromides and iodides of titanium and zirconium, the resulting polymer having a high degree of flexibility at low temperature.
Claims2
A method for polymerizing 1,3-butadiene which comprises contacting said 1,3-butadiene with a catalyst consisting essentially of (a) a compound corresponding to the formula R.sub.3 Al, wherein R is an alkyl radical having 2 to 4 carbon atoms and (b) titanium tetraiodide.
A process for producing rubbery vulcanizable polybutadiene which is characterized by improved flexibility at low temperatures, which process comprises polymerizing butadiene-1,3 in an inert hydrocarbon medium in the presence of a catalyst resulting from the interaction in said medium of (a) a trialkyl aluminum of the formula R.sub.3 Al wherein R is an alkyl radical containing 2 to 8 carbon atoms and (b) titanium tetraiodide, the mole ratio of aluminum to titanium being from 0.3 to 1 to 15 to 1.
Dependencies are inferred from the claim text.