Silica reinforced rubber composition field
AssigneeThe Goodyear Tire & Rubber Company
InventorsPaul H. Sandstrom, Richard G. Bauer, Donald J. Burlett, Mark S. Sinsky
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Abstract
A rubber composition comprised of elastomer, silica, optionally carbon black and a silica coupler comprised of dithiodipropionic acid.
Claims10
A rubber composition comprised of (A) 100 parts by weight of at least one diene-based elastomer, (B) about 5 to about 90 phr particulate silica, (C) about zero to about 80 phr carbon black, and (D) a silica coupler selected from (i) dithiodipropionic acid or from (ii) a combination of about 95 to about 25 weight percent dithiodipropionic acid and, correspondingly, about 5 to about 75 weight percent bis- (3-triethoxysilylpropyl) tetrasulfide;
- wherein the weight ratio of said silica coupler to silica is in a range of about 0.01/1 to about 0.2/1;
- wherein the weight ratio of silica to carbon black, where the rubber composition contains carbon black, is at least about 0.1/1 and wherein the total of silica and carbon black, where the rubber composition contains carbon black, is in a range of about 30 to about 120.
A rubber composition comprised of (A) 100 parts by weight of at least one diene-based elastomer, (B) about 25 to about 90 phr particulate silica, (C) up to about 30 phr carbon black, and (D) a silica coupler selected from (i) 3,3-dithiodipropionic acid or from (ii) about 95 to about 55 weight percent 3,3-dithiodipropionic acid and, correspondingly, about 5 to about 45 weight percent bis-(3-triethoxysilylpropyl)tetrasulfide;
- wherein the weight ratio of said silica coupler to silica is in a range of about 0.01/1 to about 0.2/1;
- wherein the weight ratio of silica to carbon black is in a range of about 3/1 to about 30/1;
- wherein the total of silica and carbon black is in a range of about 30 to about 120;
- wherein the silica is characterized by having a BET surface area in a range of about 50 to about 300 square meters per gram and a dibutylphthalate (DBP) absorption value in a range of about 150 to about 300;
- and wherein said rubber composition is exclusive of any organo-cobalt compound.
Dependencies are inferred from the claim text.