Tire containing closed cellular rubber foam in its tire cavity which contains diverse carbon blacks
OwnerPaul Harry Sandstrom, George Frank Balogh +1inventors
InventorsPaul Harry Sandstrom, George Frank Balogh, Leighton Randolph Spadone
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Abstract
Field of Invention The present invention relates to a pneumatic tire having its internal cavity containing a closed cellular rubber which contains a dispersion of at least two diverse carbon blacks to promote an improved path for thermal conductivity with suitable physical properties for the closed cellular foam rubber.
Claims19
A pneumatic rubber tire with its internal cavity containing a closed cellular rubber within its internal cavity wherein the rubber composition of said closed cellular rubber contains a dispersion of at least two diverse carbon blacks to promote a path of thermal conductivity;
- wherein said rubber composition is comprised of at least one conjugated diene-based elastomer and contains from about 20 to about 60 phr of at least two diverse carbon blacks;
- wherein said diverse carbon blacks are comprised of:
- (A) about 5 to about 30 phr of Category A rubber reinforcing carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 30 to about 60 m2/g together with a DBP adsorption value in a range of from about 70 to about 140 cc/100 g, and
- (B) about 5 to about 40 phr of carbon black comprised of at least one of:
- (1) Category B low rubber reinforcing carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 3 to about 30 m2/g together with a DBP adsorption value in a range of from about 20 to about 50 cc/100 g,
- (2) Category C thermally conducting carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 50 to about 75 m2/g, and
- (3) Category D thermally conductive carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 80 to about 120 m2/g together with a DBP adsorption value in a range of from about 190 to about 210 cc/100 g.
A tire assembly comprised of a pneumatic cured rubber tire with its internal cavity containing a plurality of layers of solid uncured rubber composition to form an assembly of said cured tire and uncured rubber composition, wherein said uncured rubber composition contains a dispersion of at least two diverse carbon blacks to promote a path of thermal conductivity;
- wherein said uncured rubber composition is comprised of at least one conjugated diene-based elastomer and contains from about 20 to about 60 phr of at least two diverse carbon blacks;
- wherein said diverse carbon blacks are comprised of:
- (A) about 5 to about 30 phr of Category A rubber reinforcing carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 30 to about 60 m2/g together with a DBP adsorption value in a range of from about 70 to about 140 cc/100 g,
- (B) about 5 to about 40 phr of carbon black comprised of at least one of:
- (1) Category B low rubber reinforcing carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 3 to about 30 m2/g together with a DBP adsorption value in a range of from about 20 to about 50 cc/100 g,
- (2) Category C thermally conducting carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 50 to about 75 m2/g, and
- (3) Category D thermally conductive carbon black having a nitrogen adsorption surface area (NSA) in a range of from about 80 to about 120 m2/g together with a DBP adsorption value in a range of from about 190 to about 210 cc/100 g, and C. temperature activatable blowing agent.
Dependencies are inferred from the claim text.