Tire tread
A tire tread and a tire are provided, more particularly, a tire having a tread or other elastomeric component within enhanced composite material properties, including, but not limited to, modulus ratio, percent elongation at break, and/or tan delta, wherein the tire, tread or other elastomeric component comprise composites characterized by well dispersed reinforcing filler, which can be indicated by macrodispersion.
1. A tire tread comprising at least one elastomer and 40-80 phr of at least one filler, the filler comprising at least 40 phr of at least one carbon black, the tire tread having:
a. Modulus ratio >5.60;
b. Percent elongation at break >470, and
c. Tan delta at 60° C. ≥0.10 and <0.25,
wherein said tire tread is characterized by a macrodispersion value V, an area percentage of undispersed carbon black particles larger than 10 um determined by optical microscopy in transmission mode, according to the equation: 0.01<V<0.15.
2. The tire tread of claim 1 , wherein said modulus ratio, said percent elongation at break, and said tan delta values are based on said tire tread being tested with said carbon black at 50 phr.
3. The tire tread of claim 1 , wherein the elastomer comprises a blend of elastomers selected from natural rubber, functionalized natural rubber, styrene-butadiene rubber, functionalized styrene-butadiene rubber, polybutadiene rubber, functionalized polybutadiene rubber, and blends thereof.
4. A tire tread comprising at least one elastomer and 20-80 phr of at least one filler, the filler comprising 40 phr or less of at least one carbon black, the tread having:
a) Modulus ratio ≥5.43;
b) Percent elongation at break >400, and
c) Tan delta at 60° C. >0.09 and <0.15,
wherein said tire tread is characterized by a macrodispersion value V, an area percentage of undispersed carbon black particles larger than 10 um determined by optical microscopy in transmission mode, according to the equation: 0.01<V<0.15.
5. A tire tread comprising at least one elastomer and 20-80 phr of at least one filler, the filler comprising 40 phr or less of at least one carbon black, and the tread characterized by a macrodispersion value V, an area percentage of undispersed carbon black particles larger than 10 μm determined by optical microscopy in transmission mode, of greater than 0.01, and the tread having at least one of:
a) Modulus ratio ≥5.43; or
b) Percent elongation at break >400, or
c) Tan delta at 60° C. <0.25.
6. The tire tread of claim 1 , wherein the filler comprises at least one material selected from carbonaceous materials, carbon black, silica, nanocellulose, lignin, clays, nanoclays, metal oxides, metal carbonates, pyrolysis carbon, graphenes, graphene oxides, reduced graphene oxide, carbon nanotubes, single-wall carbon nanotubes, multi-wall carbon nanotubes, or combinations thereof, and coated and treated materials thereof.
7. The tire tread of claim 1 , wherein the filler comprises at least one material selected from carbon black, silica, and coated and treated materials thereof.
8. The tire tread of claim 1 , wherein the elastomer is selected from natural rubber, functionalized natural rubber, styrene-butadiene rubber, functionalized styrene-butadiene rubber, polybutadiene rubber, functionalized polybutadiene rubber, polyisoprene rubber, ethylene-propylene rubber, isobutylene-based elastomers, polychloroprene rubber, nitrile rubber, hydrogenated nitrile rubber, polysulfide rubber, poleyacrylate elastomers, fluoroelastomers, perfluoroelastomers, silicone elastomers, and blends thereof.
9. The tire tread of claim 1 , wherein the elastomer is styrene-butadiene rubber, functionalized styrene-butadiene rubber, polybutadiene rubber, polyisoprene rubber, ethylene-propylene rubber, nitrile rubber, hydrogenated nitrile rubber, or blends thereof.
10. The tire tread of claim 1 , wherein the elastomer is natural rubber or functionalized natural rubber or both.
11. The tire tread of claim 10 , wherein the filler is selected from carbon black, silica, and coated and treated materials thereof.
12. A tire tread comprising at least one elastomer and 20-80 phr of at least one filler, the filler comprising at least 40 phr of at least one carbon black, the tire tread having:
a) Modulus ratio >5.60;
b) Percent elongation at break >480, and optionally,
c) Tan delta at 60° C. <0.25,
and the tread is characterized by a macrodispersion value V, an area percentage of undispersed carbon black particles larger than 10 μm as determined by optical microscopy in transmission mode, of greater than 0.01.