Sulfenyl halide polymerization terminators
AssigneeBridgestone Corporation
InventorsDavid F. Lawson, Mark L. Stayer, Thomas A. Antkowiak
Life of this patent
Estimating the term…
Abstract
A method of preparing a functionalized polymer comprising the steps of initiating the formation and propagation of an anionically-polymerized living polymer, and terminating the propagation of the living polymer by reacting the polymer with a terminating agent selected from the group of agents defined by the formulas (III), (IV), and (V) where C is a carbon atom, S is a sulfur atom, X is a halogen atom, R2 and R4 are independently selected from hydrogen and carbon-based moieties, and where the phenyl groups are selected from unsubstituted and substituted phenyl groups.
Claims20
A method for grafting a polymeric chain to another polymer comprising the steps of:
- reacting at least one functionalized polymer with a second polymer that contains a reactive site, where the functionalized polymer is prepared by reacting a living, anionically-polymerized polymer with a terminating agent that is defined by the formula (I)
- R1—S—X (I)
- where S is a sulfur atom, X is a halogen atom, and R1 is a carbon-based moiety, with the proviso that the carbon-based moiety does not include a Zerewittenoff-reactive substituent.
A method for forming a graft copolymer comprising the steps of:
- reacting at least one functionalized polymer with a second polymer that contains a reactive site, where the functionalized polymer contains a functional group that results from terminating the propagation of a living polymer with a terminating agent that includes one or more of the following compounds
- where C is a carbon atom, S is a sulfur atom, X is a halogen atom, R2 and R4 are independently selected from hydrogen and carbon-based moieties, and where the phenyl groups are selected from unsubstituted and substituted phenyl groups.
A method for forming a graft copolymer comprising the steps of:
- preparing a first polymer by initiating the formation and propagation of an anionically-polymerized living polymer and terminating the propagation by reacting the polymer with a terminating agent including one or more of the following compounds
- where C is a carbon atom, S is a sulfur atom, X is a halogen atom, R2 and R4 are independently selected from hydrogen and carbon-based moieties, and where the phenyl groups are selected from unsubstituted and substituted phenyl groups;
- providing a second polymer that contains at least one double bond;
- and
- contacting the first and second polymer.
Dependencies are inferred from the claim text.