Abstract: A calcium carbonate-containing material and a process for preparing the inventive calcium carbonate-containing material, wherein a paint includes the inventive calcium carbonate-containing material, and to the use of the inventive calcium carbonate-containing material. The calcium carbonate-containing material is prepared from an avian eggshell, wherein the calcium carbonate-containing material has a weight-median particle size d50 of from 0.5 to 10 ?m, and/or a weight top cut particle size d98 of from 2.0 to 40 ?m, and wherein the calcium carbonate-containing material includes organic matter in an amount of below 1.5 wt. %, based on the total dry weight of the calcium carbonate-containing material, and wherein the calcium carbonate-containing material has i) a brightness from 90 to 100%, according to R457, and/or ii) L* from 95 to 100, according to DIN 6174.

Abstract: The invention is a device for characterizing the particle size distribution of powders, comprising a supply member, a discharge member, a weighing member, a continuous vibration member, a screening member and, optionally, a control member, said device being characterized in that the screening member is a member that rotates about a horizontal axis and has at least four positions corresponding to two screens of different mesh size, one release space and one anti-shock plate. Another subject of the invention is the use of such a device for characterization of the particle size distribution of powders and especially their in-line characterization, that is to say characterization during their manufacturing process.

Abstract: Method for the treatment of mineral fillers using organic phosphate treatment agents. Treated mineral fillers obtained by said method and suspension of these treated mineral fillers in polyols. Use of these suspensions in the manufacture of flexible, semirigid, or rigid polyurethane foams used for the manufacture of molded or nonmolded objects.

Abstract: The invention relates to the technological sector of mineral fillers used in the sector which manufactures polyurethane foams and in particular fillers of the carbonate, hydroxide, silicate, sulphate type and similar mineral fillers.

Abstract: Method for the treatment of mineral fillers using organic phosphate treatment agents. Treated mineral fillers obtained by said method and suspension of these treated mineral fillers in polyols. Use of these suspensions in the manufacture of flexible, semirigid, or rigid polyurethane foams used for the manufacture of molded or nonmolded objects.

Abstract: Method for the treatment of mineral fillers using organic phosphate treatment agents. Treated mineral fillers obtained by said method and suspension of these treated mineral fillers in polyols. Use of these suspensions in the manufacture of flexible, semirigid, or rigid polyurethane foams used for the manufacture of molded or nonmolded objects.

Abstract: Method for the treatment of mineral fillers using organic phosphate treatment agents. Treated mineral fillers obtained by said method and suspension of these treated mineral fillers in polyols. Use of these suspensions in the manufacture of flexible, semirigid, or rigid polyurethane foams used for the manufacture of molded or nonmolded objects.

Abstract: Process of continuously separating electrically charged, solid pulverulent materials in the form of a suspension in an electrophoresis and electroosmosis cell, characterized in that a fraction of the catholyte is drained off, that a portion thereof is treated with an acid, preferably gaseous, agent, that the treated portion is re-introduced into the cathode compartment, whereas the other part of the drained-off fraction is eliminated.The acid treatment is effected during continous pH measurements on the drained-off fraction of the catholyte.

Abstract: Device for putting in contact fluids appearing in the form of different phases at least one of which is in hot and gaseous form comprising an outer envelope of revolution (1) provided in its upper part with an upper floor (2) and in its lower part with a convergent-divergent nozzle (5) defining a narrow passage (6) in which the hot, gas phase circulates driven with a helical movement. The downstream end of a feed pipe (7) of one of the other phases appearing in the liquid or pasty state or in the form of a suspension comes out axially. To release all the thermal stresses of the envelope (1) and of the upper floor (2) and to maintain the downstream end of the feed pipe (7) in its initial adjustment position in relation to the axis and to the plane of the narrow passage (6), the upstream end of the feed pipe is separated from the outer envelope of revolution (1) by an elastic, fluidtight means able to absorb expansions due to the differences of temperature between the feed (7) and the pipe and envelope (1).

Abstract: A device for withdrawal of a fixed volume of powdered, liquid or gaseous material from a withdrawal zone and for conditioning the withdrawn materials for the purpose of analysis which comprises a retractable cylindrical probe in which there is provided a cavity of known capacity, a retractable sleeve coaxially disposed over the probe for permitting or preventing access to the cavity, a substantially closed chamber in which the probe and sleeve are disposed for reciprocal movement into and out of the withdrawal zone, whereby the probe and sleeve may be extended from the chamber into the withdrawal zone, the sleeve may be retracted to fill the cavity, the sleeve may be extended to seal the cavity, the probe and sleeve may be retracted from the withdrawal zone back into the closed chamber, and finally, the sleeve may again be retracted to permit conditioning of the withdrawn material.

Abstract: A novel high-solids coating substance for coating paper and the like is provided. The coatings are in the form of solutions having pigment concentrations greater than 70%. The coatings provide high gloss and contain particles of calcium carbonate as substantially the only pigment.