Organotrilithium polymerization initiators
AssigneeLithium Corporation of America
InventorsConrad W. Kamienski, Robert C. Morrison
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Abstract
Preparation of novel organotrilithium initiators, which are soluble in hydrocarbon media, from disubstituted vinylaromatic compounds and mono- and dilithium organic compounds, said initiators being useful in the polymerization of conjugated dienes and copolymerization of these with vinylaromatic compounds.
Claims30
A process for preparing hydrocarbon solvent-soluble predominately organotrilithium compounds which comprises mono-adducting an aromatic hydrocarbon containing two vinylic groups with a monolithium compound which is an alkyllithium, or an aralkyllithium in which aralkyl radical is an unsubstituted hydrocarbon radical, and then subsequently reacting the remaining vinylic linkage with an organodilithium compound consisting solely of lithium, carbon and hydrogen and capable of adducting to activated unsaturated groupings.
A process for preparing hydrocarbon solvent-soluble predominately organotrilithium compounds which comprises mono-adducting an aromatic hydrocarbon containing two vinylic groups with an organodilithium compound consisting solely of lithium, carbon and hydrogen and capable of adducting to activated unsaturated groupings, and then subsequently reacting said mono-adduct with a monolithium compound which is an alkyllithium, or an aralkylithium in which the aralkyl radical is an unsubstituted hydrocarbon radical.
A process for preparing hydrocarbon solvent-soluble predominately organotrilithium compounds which comprises reacting (a) an organodilithium compound consisting solely of lithium, carbon and hydrogen and capable of adducting to activated unsaturated groupings with (b) a mono-adduct of an aromatic hydrocarbon containing two vinylic groups with a monolithium compound which is an alkyllithium, or an aralkyllithium in which the aralkyl radical is an unsubstituted hydrocarbon radical, said mono-adduct containing substantially one free vinylic linkage.
A process for preparing hydrocarbon solvent-soluble predominately organotrilithium compounds which comprises reacting- (a) an alkyllithium with (b) a mono-adduct of an aromatic hydrocarbon containing two vinylic groups with an organodilithium compound consisting solely of lithium, carbon and hydrogen and capable of adducting to activated unsaturated groupings.
A composition containing predominately a hydrocarbon-solvent soluble organotrilithium initiator compound comprising a reaction product of (a) a mono-adduct of an aromatic hydrocarbon containing two vinylic groups with an alkyllithium with (b) an organodilithium compound consisting solely of lithium, carbon and hydrogen and capable of adducting to activated unsaturated groupings.
A composition containing predominately a hydrocarbon-solvent soluble organotrilithium initiator compound comprising a reaction product of (a) a mono-adduct of an aromatic hydrocarbon containing two vinylic groups with an organodilithium compound consisting solely of lithium, carbon and hydrogen and capable of adducting to activated unsaturated groupings with (b) a monolithium compound which is an alkyllithium, or an aralkyllithium in which the aralkyl radical is an unsubstituted hydrocarbon radical.
A hydrocarbon solvent-soluble organotrilithium compound comprising the reaction product of 1,3-bis-(1-lithio-1,3-dimethylpentyl) benzene with 3-(1-lithio-1,3-dimethylpentyl)-alphamethylstyrene.
A hydrocarbon solvent-soluble organotrilithium compound comprising the reaction product of a dilithio isoprene dimer with 3-(1-lithio-1,3-dimethylpentyl)-alphamethylstyrene.
A composition containing predominately a hydrocarbon solvent-soluble organotrilithium compound comprising the reaction product of 1,3-bis-(1-lithio-3-methylpentyl) benzene and 3-(1-lithio-3-methylpentyl) styrene.
A hydrocarbon solvent-soluble organotrilithium compound comprising the reaction product of sec-butyllithium with a mono-adduct of 1,3-bis-(1-lithio-1,3-dimethylpentyl) benzene with 1,3-diisopropenylbenzene.
Dependencies are inferred from the claim text.