Process for making terminally functional polymers
AssigneeAtlantic Richfield Company
InventorPaul A. Mancinelli
Life of this patent
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Abstract
The alkyllithium initiated preparation of terminally functional polymers in high yield is accomplished by first capping a macromolecular polymer with an alkylene sulfide prior to terminating the molecule with a halogenated compound containing a polymerizable moiety. The resulting macromolecular monomers are useful in the preparation of graft copolymers by copolymerizing the macromolecular monomers with monomers copolymerizable therewith.
Claims4
A method for making functionally terminated polymers comprising polymerizing monomers susceptible to anionic polymerization with an alkyllithium initiator to a polymer chain of number average molecular weight of between 300 and 150,000, reacting the polymer chain with an alkylene sulfide and then terminating the chains with a halogenated compound containing a polymerizable moiety to form a macromolecular monomer of general formula ##STR3## where A is the alkyl portion of an alkyllithium initiator, Z is a repeating monomeric unit of a monomer susceptible to anionic polymerization, n is a positive interger from 3 to 1500, R is either hydrogen, C.sub.1 -C.sub.10 alkyl, or phenyl, x is a positive integer of at least 1, and R' is a radical formed by removal of the halogen from a halogenated compound containing a moiety polymerizable by free-radical, cationic, or anionic initiators.
Dependencies are inferred from the claim text.