Claims
- 1. A pneumatic tire comprising a silica-filled vulcanized compound that comprises a diene elastomer containing an organo-tin functionality derived from a terminator selected from the group consisting of tin tetrachloride, (R1)2SnCl2, R1SnCl3, (R1)2Sn(OR1)2, Sn(OR1)4, dialkyldioxastannylanes of the formula wherein a is 2 or 3, and mixtures thereof, wherein each R1 is independently C1 to about C8 aliphatic, about C6 to about C12 cycloaliphatic, or about C6 to about C18 aromatic, a silica filler, and a vulcanization agent, wherein said silica-filled compound has a reduced viscosity compared to the viscosity of a control silica-filled compound comprising an equivalent diene elastomer containing an organo-silicon functionality derived from a silicon-based terminator.
- 2. The tire of claim 1, wherein the elastomer is selected from the group consisting of homopolymers of a conjugated diene monomer and copolymers comprising monomer units derived from a diene monomer and a monomer unit selected from the group consisting of monovinyl aromatic monomers and triene monomers.
- 3. The tire of claim 1, wherein each R1 is independently C1 to about C10 aliphatic, about C6 to about C10 cycloaliphatic, or about C6 to about C12 aromatic.
- 4. The tire of claim 1, wherein the silica is present in an amount of about 1 phr to about 100 phr.
- 5. The tire of claim 4, wherein the silica is present in an amount of about 5 phr to about 80 phr.
- 6. The tire of claim 1, further comprising a carbon black filler.
- 7. The tire of claim 1, further comprising a natural rubber.
- 8. The tire of claim 1, wherein the tire comprising the diene elastomer containing an organo-tin functionality exhibits decreased rolling resistance compared to the rolling resistance of a similar tire comprising the equivalent diene elastomer containing an organo-silicon functionality.
Parent Case Info
This application is a division of U.S. application Ser. No. 08/891,569, filed Jul. 11, 1997.
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