Multifunctional initiators for anionic polymerization and polymers therefrom
AssigneeBridgestone Corporation
InventorYan Yan-Yong
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Abstract
The embodiments of the invention relate to a multifunctional lithiated amine-containing compound comprising at least two molecules of lithiated amine in a molecule of the compound. In one embodiment, the compound has a formula where x is an integer of 1 or more, Q is (a) an element selected from the group consisting of O, S, N, P and Si or (b) an alkylene group having from 1 to 20 methylene groups, and R1 and R2 are the same or different and are selected from the group consisting of alkyls, cycloalkyls and aralkyls containing from 1 to 20 carbon atoms. In another embodiment, the compound comprises cyclic lithio amines and has a formula: where x is 1 or more, R3, R4 and R5 are the same or different and represent alkylene groups containing from 3 to 20 carbon atoms.
Claims14
A method of preparing a polymer by employing anionic polymerization comprising the steps of:
- (i) providing at least one conjugated diene monomer;
- (ii) providing an initiator comprising a multifunctional lithiated amine-containing compound comprising at least two lithiated amine groups per molecule of the compound, wherein the multifunctional lithiated amine-containing compound is Li-4,4′-trimethylenedipiperidine-Li;
- and
- (iii) contacting the monomer and the initiator.
A method of preparing a polymer by employing anionic polymerization comprising the steps of:
- (i) providing at least one conjugated diene monomer;
- (ii) providing an initiator comprising a multifunctional lithiated amine-containing compound comprising at least two lithiated amine groups per molecule of the compound, the multifunctional lithiated amine-containing compound having the following formula:
- wherein x is 1 or more and wherein R3, R4, and R5 are the same or different and represent alkylene groups containing from 3 to 20 carbon atoms;
- and
- (iii) contacting the monomer and the initiator.
A method of preparing a polymer by employing anionic polymerization comprising the steps of:
- (i) providing at least one conjugated diene monomer;
- (ii) generating an initiator in-situ where the initiator comprises a multifunctional lithiated amine-containing compound comprising at least two lithiated amine groups per molecule of the compound, wherein the multifunctional lithiated amine-containing compound is Li-4,4′-trimethylenedipiperidine-Li;
- and
- (iii) contacting the monomer and the initiator.
Dependencies are inferred from the claim text.