Multifunctional coupling agent
AssigneeShell Oil Company
InventorGeorge R. Haynes
Life of this patent
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Abstract
Lithium metal-terminated polymers of one or more alkadienes and of one or more monoalkenyl arenes are coupled by reaction with a coupling agent of the general formula (R.sub.1 O).sub.3 Si -R.sub.2 -O-R.sub.2 -Si--O-R.sub.1).sub.3 where R.sub.1 is an alkyl group of 1 to 4 carbon atoms and R.sub.2 is an alkyl group of 2 to 10 carbon atoms.
Claims10
A process for the production of a polymer comprising reacting a living lithium-terminated polymer having the formula P-Li wherein P is selected from the group consisting of polymer chains of one or more alkadienes having 4-12 carbon atoms and copolymer chains of one or more alkadienes having 4-12 carbon atoms and one or more monoalkenyl arenes of 8-18 carbon atoms, having the alkenyl radical attached to an arene ring carbon atom, with a coupling agent of the general formula
- (R.sub.1 --O).sub.3 Si--R.sub.2 --O--R.sub.2 --Si--O--R.sub.1).sub.3
- wherein R.sub.1 is an alkyl group of 1 to 4 carbon atoms and R.sub.2 is an alkylene group of 2 to 10 carbon atoms.
Dependencies are inferred from the claim text.