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US 2006/0135701 A1Published application
Hysteresis elastomeric compositions comprising sequentially terminated polymers
AssigneeBridgestone Corporation
InventorsDavid Lawson, Christine Rademacher, Christopher Robertson
Life of this patent
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Abstract
Anionically-polymerized living polymers are sequentially functionalized with certain agents X′ and Y′. A method of preparing a functionalized polymer comprising the steps of reacting the polymer with a functionalizing agent X′, and then further reacting the polymer with a functionalizing agent Y′.
Claims18
A vulcanizate comprising:
- a vulcanized rubber formulation comprising at least one vulcanized rubber and a filler, where the at least one vulcanized rubber includes a vulcanizate of a sequentially functionalized polymer that is prepared by
- reacting an anionically polymerized living polymer with a functionalizing agent X′ to produce an end-functionalized polymer that will react or interact with carbon black, silica, or both and that comprises a reactive electrophilic or nucleophilic site;
- and
- reacting the reactive site with a functionalizing agent Y′ to produce a sequentially functionalized polymer that will react or interact with carbon black and silica.
1 more element
A method for preparing a sequentially functionalized polymer, the method comprising:
- reacting an anionically polymerized living polymer with a functionalizing agent X′ to produce an end-functionalized polymer that will react or interact with carbon black, silica, or both and that comprises a reactive electrophilic or nucleophilic site;
- and
- reacting the reactive site with a functionalizing agent Y′ to produce a sequentially functionalized polymer that will react or interact with carbon black and silica.
A functionalized polymer defined by the formula
- XmZYn
- where is an anionically polymerized polymer segment, X comprises a first functional group that will react or interact with carbon black, silica, or both, Y comprises a second functional group that will react or interact with carbon black, silica, or both, Z is a bond or a chain-extending group, and .m and n are each integers from 1 to about 50, with the proviso that when X will react or interact with carbon black but not with silica, Y will react or interact with silica, and when X will react or interact with silica but not with carbon black, Y will react or interact with carbon black.
Dependencies are inferred from the claim text.