Coupling of alkali metal-terminated polymers
AssigneePhillips Petroleum Company
InventorGeorge A. Moczygemba
Life of this patent
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Abstract
Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by an anhydride of a monocarboxylic acid having 2 to 8 carbon atoms per molecule.
Claims6
A polymer having the structure ##STR5## wherein the radicals R, which can be the same or different, are hydrocarbyl radicals with 1 to 7 carbon atoms, R' is a divalent radical selected from the group consisting of ##STR6## wherein Y is selected from the group of radicals consisting of --OH and --Z, and wherein Z is a homopolymer or copolymer chain of one or more conjugated alkadienes of 4 to 12 carbon atoms per molecule or a copolymer chain of at least one alkadiene of 4 to 12 carbon atoms and at least one monovinyl-substituted arene radical of 8 to 18 carbon atoms per molecule, the vinyl radical being attached to a carbon atom of the arene ring,
- with the further provision that at least 160 polymer chains Z are present in 100 molecules of formula (I).
Dependencies are inferred from the claim text.