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US 5,294,253 AGranted
Carbon black system and improved rubber stock
AssigneeHydril Company
InventorsDouglas W. Carlson, William D. Breach
Life of this patent
Estimating the term…
Abstract
An improved rubber stock with a unique carbon black system including mismatched pairs of furnace blacks with fumed silica and a silane coupler has been developed. The carbon black system includes a mixture of large and small particles with high and low structure carbon black pairs. The carbon black system compounded with polar and nonpolar rubber provides products with a range of desirable characteristics using only two carbon blacks.
Claims13
A carbon black system for rubber manufacture comprising
- a pair of carbon blacks;
- one of said pair of carbon blacks having a low structure with a DBP No. of less than 110 with the other of said pair having a high structure with a DBP No. of greater than 110;
- one of said pair of carbon blacks having a large particle size with an Iodine Adsorption No. of less than 110 and the other of said pair having a small particle size with an Iodine Adsorption No. of greater than 110;
- a fumed silica;
- and
- a silane coupler.
3 more elements
A rubber composition comprising
- a rubber selected from the group of polar and nonpolar rubbers;
- a carbon black system comprising a mixture of a pair of furnace carbon blacks;
- one of said pair of carbon blacks having a low structure with a DBP No. of less than 110 with the other of said pair having a high structure with a DBP No. of greater than 110;
- one of said pair of carbon blacks having a large particle size with an Iodine Adsorption No. of less than 110 and the other of said pair having a small particle size with an Iodine Adsorption No. of greater than 110;
- a fumed silica;
- and
- a silane coupler.
4 more elements
Dependencies are inferred from the claim text.