Patent ID: 6703446
Filing Date: 2004-03-09
Classification: C08C,C08F

Abstract:
A polymer having mixed functional ends produced by polymerizing a monomer selected from conjugated diene hydrocarbons, alkenylsubstituted aromatic hydrocarbons, 2-vinylpyridine, 4-vinylpyridine, and mixtures thereof, with a protected functional organometallic initiator of the formulaMâ€”Qnâ€”Zâ€”Jâ€”[A(R1R2R3)]x wherein:M is an alkali metal; Q is a saturated or unsaturated hydrocarbyl group derived by incorporation of a compound selected from the group consisting of conjugated diene hydrocarbons, alkenylsubstituted aromatic hydrocarbons, 2-vinylpyridine, 4-vinylpyridine, and mixtures thereof; n is an integer from 0 to 5; Z is a branched or straight chain hydrocarbon group which contains 3-25 carbon atoms, optionally containing aryl or substituted aryl groups; J is sulfur or nitrogen; A is an element selected from Group IVa of the Periodic Table of Elements; R1, R2, and R3 are independently selected from hydrogen, alkyl, substituted alkyl groups containing lower alkyl, lower alkylthio, and lower dialkylamino groups, aryl, substituted aryl groups containing lower alkyl, lower alkylthio, and lower dialkylamino groups, cycloalkyl and substituted cycloalkyl containing 5 to 12 carbon atoms; and x is dependent on the valence of J and varies from one when J is sulfur to two when J is nitrogen, to form a mono-protected, mono-functionalized living polymer, followed by functionalizing the living polymer with a protected or non-protected functionalizing compound capable of terminating or end-capping a living polymer to provide a di-functional polymer, with the proviso that the initiator and the functionalizing compound contain different functional groups to provide a hetero-telechelic polymer; deprotecting at least one or both of said functional groups, wherein said deprotected polymer includes at least one hydroxyl functional group; reacting said at least one hydroxyl functional group with methacryloyl or acryloyl chloride to provide polymerizable alkenyl groups at the terminus thereof; and further polymerizing onto said polymerizable alkenyl groups at least one compound selected from the group consisting of acrylic monomers, sulfonated styrene, and 4-vinyl pyridine.