Patent ID: 9296832
Filing Date: 2016-03-29
CPC Classification: B60C,C08C,C08F

Claim Text:
1. A process for producing functional polymer, the process comprising the steps of: i. reacting an anionic initiator including a functional group with a stabilizing monomer to produce a stabilized initiator, where the stabilizing monomer is selected from the group consisting of 1,1-diphenylethylene, α-t-butylstyrene, α-iso-propylstyrene, and 1-methyl-1-mesityl ethylene, 1-cyclopentyl-1-phenyl ethylene, 1-naphthyl-1-phenylethylene, and 1-pyrrolidinyl-1-phenylethylene, where the anionic initiator is defined by the formula where each R 1 independently includes hydrogen or a monovalent organic group, R 0 includes a monovalent organic group, z is an integer from 1 to about 8, ε includes sulfur, oxygen, or tertiary amino, and M is a metal; ii. reacting the stabilized initiator with conjugated diene monomer, and optionally vinyl aromatic monomer, capable of being anionically polymerized to produce a polymer; and iii. terminating the polymer.