SUSPENSION CONCENTREE DE SILICE DE PRECIPITATION, PROCEDES POUR SA PREPARATION ET UTILISATIONS DE CETTE SUSPENSION

摘要

The invention relates to an aqueous suspension of precipitation silica, characterized in that its concentration of dry material is comprised between 10 and 40 % by weight, its viscosity is lower than 4.10<-2> Pa.s for a shearing of 50 s<-1> and the quantity of silica contained in the supernatant obtained after centrifugation of said suspension at 7500 rpm during 30 minutes represents more than 50 % of the weight of silica contained in the suspension. The grain size distribution of suspended agglomerates is such that their medium diameter D50 is smaller than 5 mu m and the disagglomeration factor FD is higher than 3 ml. Said suspension may be used for producing anti-corrosion coatings, for the preparation of concretes, paper or mineral glues.