| 摘要 |
A carbon black composition comprising two carbon blacks, the first of which has a lower modules value and a higher abrasion loss than the second, the ratio of the second carbon black to the first being at least 1 : 1 by weight whereby the mixture has a preselected modulus value intermediate between the modulus values of the two carbon blacks and an abrasion loss not substantially greater than that of the second carbon black. Two streams of gas may be blended to form the product. The carbon blacks may be produced by cracking a hydrocarbon by combustion of a portion of the hydrocarbon and/or that of a second hydrocarbon. The hydrocarbon may be from a petroleum or non-petroleum source e.g. methane, buthane, pentane, gas oils, kerosene, gasoline boiling range hydrocarbons, heavy and light naphthas, residual and cycle oils. The combustion supporting gas may be air, oxygen, or oxygen enriched air in amount to completely combust the fuel. Modulus control additives may be: alkali or alkaline earth metals as their inorganic compounds e.g. halides, carbonates, fluorosilicates, borates or hydroxides in amount 0.001% to 3% of the feedstock. Solid carbonaceous materials e.g. coal, coke, charcoal, lignite in amount up to 15% of the feedstock may be incorporated. The additive may be in particulate form or in aqueous solution and may be introduced separately, or in combination with one or more of the reactants. The modulus may also be controlled by establishing and maintaining a constant gas flow rate of fuel and combustion supporting gas while varying the feedstock flow rate to establish the preselected temperature. The reaction may be stopped by quenching with water. In examples carbon blacks were prepared at 2640 DEG F. and 3050 DEG F. and blended and compounded with: SBR 1500 rubber softener (an aromatic petroleum oil), ZnO, S, stearic acid, mercaptobenzo thiazole, diphenyl guanidine and cured at 293 DEG F. In different examples (2) a 15% solution of NaCl, (3) 3% of bituminous coal, (5) CaCl2, and (6) coke and charcoal were added.ALSO:A rubber composition containing two carbon blacks, the first of which has a lower modulus value and a higher abrasion loss than the second, the ratio of the second carbon black to the first being at least 1:1 by weight whereby the mixture has a preselected modulus value intermediate between the modulus values of the two carbon blacks and an abrasion loss not substantially greater than that of the second carbon black. In an example carbon blacks prepared by cracking a hydrocarbon at 2640 DEG F. and 3050 DEG F. were blended and compounded with: SBR-1500, softener, ZnO, S, stearic acid, mercaptobenzothiazole and diphenylguanidine and cured at 293 DEG F. |
