A composition comprising a pigment particle that is coated with a cationic material and isopropyl titanium triisostearate. The pigment particle can be included in a cleansing composition for deposition on a surface, such as skin.

An aqueous suspension comprising an inorganic particulate material and dimethylethanolamine, use of dimethylethanolamine to prevent pH decrease or reduce the rate of pH decrease of an aqueous suspension comprising an inorganic particulate material over time, use of dimethylethanolamine as an anti-microbial additive in an aqueous suspension comprising an inorganic particulate material, and a method of preparing an aqueous suspension comprising inorganic particulate material.

A method of manufacturing a pigment comprising the steps of a) providing at least one surface-reacted calcium carbonate, b) providing at least one water-soluble iron compound, c) providing at least one treatment agent, d) combining the at least one surface-reacted calcium carbonate of step a) with the at least one water-soluble iron compound of step b) in an aqueous medium, e) adding the at least one treatment agent to the mixture of step d), f) dewatering the mixture of step e), g) thermally treating the mixture of step f) at a temperature of from 80 to 150 C., wherein the surface-reacted calcium carbonate is a reaction product of ground natural calcium carbonate-containing mineral or precipitated calcium carbonate with carbon dioxide and one or more H.sub.3O.sup.+ ion donors; a pigment obtained by said method and products thereof.

A chemical processing method to increase the brightness of a naturally sourced GCC. The process described herein employs a persulfate under certain heating and stirring conditions to effect a brightness change which can be on the order of about 8 points on the GE brightness scale and can move a GCC which is under a GE level of 80 to above a GE level of 80.

The present invention relates to an aqueous pigment composition comprising a blend of ground natural calcium carbonate (GNCC) and surface modified calcium carbonate (MCC) at a specific ratio and each having a specific particle size distribution. A process for producing the inventive pigment composition is also disclosed. The inventive pigment composition may be used in paints or coatings.

A stable aqueous dispersion of platy particles and precipitated calcium carbonate, a method of producing the same and uses of the dispersion. The aqueous dispersion comprises 50 to 95 parts by weight of platy particles; and 5 to 50 parts by weight of precipitated calcium carbonate particles having an average diameter of 30 to 60 nm. The dispersion has a dry matter content of more than 30% by weight of the dispersion, and a Brookfield viscosity (100 rpm) of 200 to 5000 cP. The dispersion is suitable for forming barrier coatings on a substrate, having properties of improved gas barrier and improved mineral oil barrier.

A method of making a cement composition, comprising grinding a cement clinker and a strength-enhancing agent, thereby producing a hydraulic cementitious powder, wherein the strength-enhancing agent is present in the hydraulic cementitious powder in an amount of from 0.001% to 0.09% based on dry weight of the hydraulic cementitious powder. The strength-enhancing agent is a compound represented by the following structural formula (I). The definitions of variables R.sup.1, R.sup.2, and R.sup.3 as well as R.sup.10, R.sup.20, and R.sup.30 are provided herein.

A method for grinding a solid in a vertical roller mill (VRM), comprising grinding at least one solid in the presence of a grinding stabilizing additive, wherein the grinding stabilizing additive comprises an alkanol amino acid compound or a disodium or dipotassium salt thereof having the structural formula (I): The definitions of variables R.sup.1, R.sup.2, and R.sup.3 are provided herein.

##STR00001##

The present invention refers to a process for making a calcium carbonate containing material, wherein the process includes a specific drying procedure and allows for the provision of calcium carbonate materials with reduced moisture pick-up and low porosity.

The present invention relates to a process for the surface treatment of a surface-modified calcium carbonate, a surface-treated calcium carbonate obtained by the process as well as the use of the surface-treated calcium carbonate in a polymer composition, in paper making, paper coatings, agricultural applications, paints, adhesives, sealants, construction applications, pharma applications and/or cosmetic applications, or for cross-linking of rubber, in sheet moulding compounds, in bulk moulding compounds, in cross-linkable polyolefin system formulations, preferably for pipes and cables, in cross-linkable polyvinyl chloride, in unsaturated polyesters and in alkyd resins, and the use of the surface-treated calcium carbonate and a curing agent for crosslinking of cross-linkable compounds.