초록 ▼

The invention is directed to a pneumatic tire having a component comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 35 to about 65 phr of a solution polymerized styrene-butadiene rubber with a styrene content of from about 38 t

The invention is directed to a pneumatic tire having a component comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 35 to about 65 phr of a solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 percent by weight and a Tg of from about-22째 C. to about-10째 C.; (B) from about 10 to about 35 phr of an emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight and a Tg of from about-55째 C. to about-28째 C.; (C) from about 10 to about 35 phr of polybutadiene; and (D) from about 10 to about 100 phr of silica.

대표청구항 ▼

What is claimed is: 1. A pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 35 to about 65 phr of a solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 p

What is claimed is: 1. A pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 35 to about 65 phr of a solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 percent by weight and a Tg of from about-22째 C. to about-10째 C. (B) from about 10 to about 35 phr of an emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight, and a Tg of from about-55째 C. to about-28째 C.; (C) from about 10 to about 35 phr of polybutadiene; and (D) from about 10 to about 100 phr of silica; wherein the emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight acts as a compatibilizer between the polybutadiene and the solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 percent by weight and a Tg of from about-22째 C. to about-10째 C. 2. The pneumatic tire of claim 1, wherein said vulcanizable rubber composition comprises about 50 to about 100 phr of silica. 3. The pneumatic tire of claim 1, wherein said tread is a tread cap. 4. The pneumatic tire of claim 1, wherein said vulcanizable rubber composition further comprises from about 5 to about 50 phr of carbon black. 5. The pneumatic tire of claim 1, wherein said vulcanizable rubber composition comprises silica and carbon black in a combined concentration of from about 20 to about 100 phr. 6. The pneumatic tire of claim 1, wherein said vulcanizable rubber composition comprises silica and carbon black in a combined concentration of from about 20 to about 100 phr and a weight ratio of about 1. 7. The pneumatic tire of claim 1, wherein said vulcanizable rubber composition further comprises from 0 to about 20 phr of 3,4-polyisoprene. 8. A pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 35 to about 65 phr of a solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 percent by weight and a Tg of from about-22째 C. to about-10째 C.; (B) from about 10 to about 35 phr of an emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight and a Tg of from about-55째 C. to about-28째 C.; (C) from about 10 to about 35 phr of polybutadiene; and (D) from about 10 to about 100 phr of silica; wherein the emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight is compatible with the solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 percent by weight and a Tg of from about-22째 C. to about-10째 C. 9. The pneumatic tire of claim 8, wherein said vulcanizable rubber composition comprises about 50 to about 100 phr of silica. 10. The pneumatic tire of claim 8, wherein said tread is a tread cap. 11. The pneumatic tire of claim 8, wherein said vulcanizable rubber composition further comprises from about 5 to about 50 phr of carbon black. 12. The pneumatic tire of claim 8, wherein said vulcanizable rubber composition comprises silica and carbon black in a combined concentration of from about 20 to about 100 phr. 13. The pneumatic tire of claim 8, wherein said vulcanizable rubber composition comprises silica and carbon black in a combined concentration of from about 20 to about 100 phr and a weight ratio of about 1. 14. The pneumatic tire of claim 8, wherein said vulcanizable rubber composition further comprises from 0 to about 20 phr of 3,4-polyisoprene. 15. The pneumatic tire of claim 8, wherein the emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight acts as a compatibilizer between the polybutadiene and the solution polymerized styrene-butadiene rubber with a styrene content of from about 38 to about 50 percent by weight and a Tg of from about-22째 C. to about-10째 C.