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US 9,187,582 B2Granted
Stabilized multi-valent anionic polymerization initiators and methods for preparing the same
AssigneeBridgestone Corporation
InventorYuan-Yong Yan
Life of this patent
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Abstract
A stabilized initiator solution comprising a multi-valent lithiated containing initiator and an aliphatic or cycloaliphatic solvent.
Claims21
A stabilized initiator solution comprising:
- i. a chain-extended initiator defined by the Formula I
- where each SOL is independently a divalent solubilizing component including from 3 to about 300 mer units, x is an integer of 1 or more, Q is (a) an element selected form the group consisting of O, S, N, P, and Si or (b) a multivalent organic group, and R1, R2, R3, and R4 are each independently a monovalent organic group, or where R1 joins with R2 to form a trivalent organic group, and/or R3 joins with R4 to form a trivalent organic group, or a chain-extended initiator defined by the Formula VI
- where each SOL is independently a divalent solubilizing component including from 3 to about 300 mer units, x is an integer of 1 or more, and R14, R15, and R16 are each independently a divalent organic group;
- and
- ii. an aliphatic solvent, cycloaliphatic solvent, or a mixture thereof.
2 more elements
A method for continuously manufacturing polydienes or polydiene copolymers, the method comprising:
- i. continuously charging conjugated diene monomer, optionally together with monomer copolymerizable therewith, to a continuously-stirred reactor;
- and
- ii. continuously charging a stabilized solution of a chain-extended initiator to the continuously-stirred reactor, where the solution includes a chain-extended initiator defined by the Formula I
- where each SOL is independently a divalent solubilizing component including from 3 to about 300 mer units, x is an integer of 1 or more, Q is (a) an element selected form the group consisting of O, S, N, P, and Si or (b) a multivalent organic group, and R1, R2, R3, and R4 are each independently a monovalent organic group, or where R1 joins with R2 to form a trivalent organic group, and/or R3 joins with R4 to form a trivalent organic group, or a chain-extended initiator defined by the Formula VI
- where each SOL is independently a divalent solubilizing component including from 3 to about 300 mer units, x is an integer of 1 or more, and R14, R15, and R16 are each independently a divalent organic group, and an aliphatic solvent, cycloaliphatic solvent, or a mixture thereof.
2 more elements
Dependencies are inferred from the claim text.