Carbon Black, Method of Producing Carbon Black and Device for Implementing the Method

Abstract

The invention relates to a carbon black having an aggregate size distribution which has a (d 90 −d 10 )/d 50 ratio of less than or equal to 1.1. The carbon blacks are produced by admixing hot air if desired to a gas mixture comprising a carrier gas and a carbon black feedstock, passing the gas mixture into a burner pipe, burning the gas mixture at the burner pipe openings, and drawing the flames under suction, together with the ambient air drawn in freely under suction from the outside, through a cooled, narrowing gap, and carrying out cooling, the cooled, narrowing gap having a height (h) to width (b) ratio of 1-100, the width (b) being 0.5 to 10 mm, and the flow rate at the narrowest point of the gap being 10-200 m/s. The carbon blacks can be used as non-reinforcing filler, reinforcing filler, UV stabilizer, conductive black, pigment or reducing agent.

1 . Carbon black comprising an aggregate size distribution with a (d 90 −d 10 )/d 50  ratio of less than or equal to 1.1 and a full width at half-maximum (FWHM) to D mode  ratio of less than or equal to 0.6 and wherein said carbon black is a gas black. 
     
     
         2 . The carbon black of  claim 1 , wherein said aggregate size distribution has a full width at half-maximum (FWHM) to D mode  ratio of 0.54-0.60. 
     
     
         3 . The carbon black of  claim 2 , wherein said carbon black has a surface oxide content greater than 50 mmol/kg. 
     
     
         4 . The carbon black of  claim 2 , wherein said carbon black has a surface oxide content greater than 120 mmol/kg. 
     
     
         5 . A composition comprising carbon blacks according to  claim 1 , wherein said composition is selected from the group consisting of: a non-reinforcing filler, a reinforcing filler, a UV stabilizer, a conductive black, a pigment, a reducing agent, rubber, plastic, printing inks, liquid inks, inkjet inks, toners, coating materials, paints, paper, bitumen, concrete and other building materials. 
     
     
         6 . The composition of  claim 5 , selected from the group consisting of: a non-reinforcing filler, a reinforcing filler, a UV stabilizer, a conductive black, a pigment, and a reducing agent. 
     
     
         7 . The composition of  claim 6 , wherein said carbon blacks have an aggregate size distribution with a full width at half-maximum (FWHM) to D mode  ratio of 0.54-0.60. 
     
     
         8 . The composition of  claim 6 , wherein said carbon black has a surface oxide content greater than 50 mmol/kg. 
     
     
         9 . The composition of  claim 7 , wherein said carbon black has a surface oxide content greater than 50 mmol/kg. 
     
     
         10 . The composition of  claim 5 , selected from the group consisting of: rubber, plastic, printing inks, liquid inks, inkjet inks, toners, coating materials, paints, paper, bitumen, concrete and other building materials. 
     
     
         11 . The composition of  claim 10 , wherein said carbon blacks have an aggregate size distribution with a full width at half-maximum (FWHM) to D mode  ratio of 0.54-0.60. 
     
     
         12 . The composition of  claim 10 , wherein said carbon black has a surface oxide content greater than 50 mmol/kg. 
     
     
         13 . The composition of  claim 12 , wherein said carbon black has a surface oxide content greater than 50 mmol/kg. 
     
     
         14 . The composition of  claim 5 , selected from the group consisting of: printing inks, liquid inks, inkjet inks, toners. 
     
     
         15 . The composition of  claim 14 , wherein said carbon blacks have an aggregate size distribution with a full width at half-maximum (FWHM) to D mode  ratio of 0.54-0.60. 
     
     
         16 . The carbon black of  claim 1 , wherein said carbon black comprises an aggregate size distribution with a (d 90 −d 10 )/d 50  ratio 0.57-0.60. 
     
     
         17 . The carbon black of  claim 16 , wherein said carbon black has a volatiles content of 4.0-9.0%. 
     
     
         18 . The carbon black of  claim 16 , wherein said carbon black has a surface oxide content greater than 120 mmol/kg. 
     
     
         19 . The composition of  claim 10 , wherein said carbon blacks comprise an aggregate size distribution with a (d 90 −d 10 )/d 50  ratio 0.57-0.60. 
     
     
         20 . The composition of  claim 19 , wherein said carbon blacks have a volatiles content of 4.0-9.0% and a surface oxide content greater than 120 mmol/kg.