Abstract: The invention relates to black having a CTAB surface area of 100 to 160 m?/g, a quartile ratio of more than 1.60, and an FP index of >0. Said black is produced in a furnace reactor. Sixty to 90 percent by weight of the raw black material are injected into the reactor in the first third of the reaction zone, while the remaining amount of the raw black material is injected into the reactor upstream at least in one other point. In addition, the combustible is conducted such that 90 to 100 percent by weight of the combustible are evaporated when first hitting the raw black material and 80 to 99 percent by weight of the combustible are evaporated 5 ms before hitting the raw black material. Said blacks can be used in rubber mixtures.

Abstract: The invention relates to black having a CTAB surface area of 100 to 160 m?/g, a quartile ratio of more than 1.60, and an FP index of >0. Said black is produced in a furnace reactor. Sixty to 90 percent by weight of the raw black material are injected into the reactor in the first third of the reaction zone, while the remaining amount of the raw black material is injected into the reactor upstream at least in one other point. In addition, the combustible is conducted such that 90 to 100 percent by weight of the combustible are evaporated when first hitting the raw black material and 80 to 99 percent by weight of the combustible are evaporated 5ms before hitting the raw black material. Said blacks can be used in rubber mixtures.

Abstract: Carbon black with an OAN, measured on the beaded carbon black, of less than 120 ml/100 g. A process for the preparation of the carbon black is described, wherein a salt solution is converted into an aerosol and this is then introduced into the carbon black formation zone. The carbon black can be used in inks, paints, lacquers, printing inks and ink-jet inks, and for coloring plastics.

Abstract: Carbon black with an OAN, measured on the beaded carbon black, of less than 120 ml/100 g. A process for the preparation of the carbon black is described, wherein a salt solution is converted into an aerosol and this is then introduced into the carbon black formation zone. The carbon black can be used in inks, paints, lacquers, printing inks and ink-jet inks, and for coloring plastics.

Abstract: Carbon black with a CTAB surface area from about 10 to 35 m2/g and a DBP absorption from about 40 to 180 ml/100 g, the &Dgr;D50 value being at least 340 nm. The carbon black may be produced in a furnace-black reactor from a liquid carbon-black raw material and gaseous carbon-black raw material injected into a constriction in the reactor. Compared to other forms of carbon black, the carbon blacks of the present invention have advantageous properties, such as improved dispersibility, and may be economically and conveniently used in rubber mixtures, particularly in those used to produce extrusion profiles.

Abstract: Carbon black with a CTAB surface area from about 10 to 35 m2/g and a DBP absorption from about 40 to 180 ml/100 g, the &Dgr;D50 value being at least 340 nm. The carbon black may be produced in a furnace-black reactor from a liquid carbon-black raw material and gaseous carbon-black raw material injected into a constriction in the reactor. Compared to other forms of carbon black, the carbon blacks of the present invention have advantageous properties, such as improved dispersibility, and may be economically and conveniently used in rubber mixtures, particularly in those used to produce extrusion profiles.

Abstract: Carbon black characterized by a STSA surface of between 20 and 180 m2/g, a 24M4-DBP absorption of between 40 and 140 ml/100 g, a specific BET surface of between 20 and 250 m2/g, a content of 0.01 to 20 wt. % of silicon, referred to its overall weight, and a tan &dgr;0/tan &dgr;60 ratio greater than 3.37−0.0068 STSA is produced by mixing silicon-containing compounds with the carbon black raw materials in the oxidative pyrolysis of the carbon black raw materials and optionally using carbon black oil as fuel. The carbon black can be used as a filler in rubber mixtures, preferably for tires.

Abstract: Precipitated silica having the following parameters: BET surface area 80-180 m2/g CTAB surface area 80-139 m2/g BET/CTAB ratio 1.0-1.6 Sears No. (consumption of 5-25 ml 0.1 N NaOH) DBP No. 200-300 ml/100 g Al2O3 content <5% wk coefficient <3.4 Degraded particles <1.0 &mgr;m Non-degradable particles 1.0-100 &mgr;m is prepared by reacting alkali silicate with mineral acids and aluminum sulfate solution at temperatures of 60-95° C. at a pH of 7.0-10.0 while stirring constantly, wherein the reaction is continued to a solids concentration of 40-110 g/l, the pH is adjusted to a value between 3 and 5, and the precipitated silica is filtered off, washed and then dried, and optionally ground or granulated.

Abstract: Inversion carbon blacks and a method for their manufacture are disclosed. The inversion carbon blacks have a lower rolling resistance with identical or improved wet skid behavior. The particle size distribution contains a smaller proportion of particles with large diameters. This leads to an improved abrasion behavior of rubber compounds which were prepared using these carbon blacks. The inversion carbon blacks can be manufactured in conventional carbon black reactors by controlling the combustion in the combustion chamber in such a manner that carbon black nuclei form, which are immediately brought into contact with the carbon black raw material. The carbon blacks present a lower proportion of larger particles if the additions of combustion air and carbon black raw material are increased in an appropriate manner.

Abstract: Precipitated silica, having the following physico-chemical parameters: BET surface area 120-300 m2/g CTAB surface area 100-300 m2/g BET/CTAB ratio 0.8-1.3 Sears index (consumption of 6-25 ml 0.1 N NaOH) DBP index 150-300 g/100 g wk coefficient <3.4 Particle size of the degraded <1.0 &mgr;m particles Particle size of the non- 1.0-100 &mgr;m degradable particles The precipitated silica is prepared by a process in which an alkali metal silicate (preferably soda water-glass) is reacted with mineral acids (preferably sulfuric acid) at temperatures of 60-95° C. at a pH of 7.0-11.0 with continuous stirring, the reaction is continued up to a solids concentration of 40 g-110 g, the pH is adjusted to a value between 3 and 5, and the precipitated silica is filtered off, washed, then dried and, if appropriate, ground or granulated.

Abstract: Disclosed are improved carbon blacks and a process for producing them. The improved carbon blacks are distinguished from conventional blacks having the same CTAB surface, after incorporation into SSBR/BR rubber compositions, by a lower rolling resistance with equal or better wet skid behavior. They can be produced in conventional carbon black reactors by conducting the burning in the combustion chamber so that carbon nuclei form and are immediately brought into contact with the carbon black raw material.

Abstract: Inversion carbon blacks and a method for their manufacture and disclosed. The inversion carbon blacks have a smaller rolling resistance with identical or improved wet sliding behavior. The particle size distribution contains a smaller proportion of particles with large diameters. This leads to an improved abrasion behavior of rubber compounds which were prepared using these carbon blacks. The inversion carbon blacks can be manufactured in conventional carbon black reactors by controlling the combustion in the combustion chamber in such a manner that carbon black nuclei form, which are immediately brought into contact with the carbon black raw material. The carbon blacks present a lower proportion of larger particles if the additions of combustion air and carbon black raw material are increased in an appropriate manner.

Abstract: Carbon blacks containing silicon and a process for manufacturing them. The carbon blacks containing silicon are suitable as reinforcing carbon blacks for rubber mixtures and give the latter viscoelastic properties such as reduced rolling resistance in tires. At the same time, the wet traction is even improved in the process.