Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Reexamination Certificate
2006-01-24
2006-01-24
Seidleck, James J. (Department: 1711)
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
C524S495000, C524S496000
Reexamination Certificate
active
06988523
ABSTRACT:
This invention discloses a pneumatic tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads; wherein said tread is adapted to be ground-contacting; wherein the tread is comprised of (a) about 60 phr to about 90 phr of a cis-1,4-polybutadiene rubber, wherein the cis-1,4-polybutadiene rubber has a glass transition temperature which is within the range of about −104° C. to about −80° C., (b) about 10 phr to about 40 phr of at least one additional rubbery polymer selected from the group consisting of polyisoprene rubber, polybutadiene rubber, isoprene-butadiene rubber, and styrene-isoprene-butadiene rubber, wherein the additional rubbery polymer has a glass transition temperature which is within the range of about −30° C. to about −10° C., and (c) about 20 phr to about 60 phr of carbon black, wherein the carbon black has a dibutylphthalate absorption value of at least 140 cm3/100 grams and wherein the carbon black has a cetyl trimethyl ammonium bromide adsorption area which is within the range of about 60 to about 90.
REFERENCES:
patent: 5047483 (1991-09-01), Halasa et al.
patent: 5132357 (1992-07-01), Endter et al.
patent: 5504140 (1996-04-01), Zanzig et al.
patent: 5534592 (1996-07-01), Halasa et al.
Blok Edward John
Losey Cheryl Ann
Sandstrom Paul Harry
Verthe John Joseph Andre
Zanzig David John
Rajguru U K.
Seidleck James J.
The Goodyear Tire & Rubber Company
Young, Jr. Henry C.
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