A pearlescent pigment for security purposes according to an embodiment of the present invention includes a single or a plurality of coating layers containing a metal oxide and an organic or inorganic fluorescent material. Since the pearlescent pigment for security purposes according to the present disclosure includes a fluorescent layer containing the organic or inorganic fluorescent material, it can be used as a pigment for security purposes due to its optical characteristics and can also provide effects such as magnetism, high color intensity, multiple colors, etc. Also, since the pearlescent pigment for security purposes has aesthetic benefit and security characteristic at the same time, it is economical, easy to use and applicable in various industries.

Composite pigments are provided which comprise a mineral pigment (such as kaolin clay, titanium dioxide, talc, mica or a mixture of two or more of these mineral pigments) and calcium carbonate precipitated in-situ on the surfaces of the particles of the mineral pigment.

This disclosure describes a process for producing a surface-modified calcium carbonate, the process comprising contacting a calcium carbonate or precursor thereof with at least one amphiphilic copolymer comprising hydrophilic subunits and hydrophobic subunits, in which the hydrophilic subunits derive from at least one ethylenically-unsaturated compound comprising a carboxylic acid group or salt or derivative thereof; the hydrophobic subunits derive from at least one ethylenically-unsaturated compound comprising a hydrophobic group; and the amphiphilic copolymer has a hydrophilic-lipophilic balance ranging from about 1 to about 40. Surface-modified calcium carbonates obtained from the process are also described, as well as compositions containing the surface-modified calcium carbonates.

The present invention refers to the use of at least one mono-substituted succinic anhydride before or during extrusion of a polymer composition comprising polylactic acid as polymer component and at least one calcium carbonate-comprising material as filler, to reduce the polymer decomposition during processing and/or to decrease the melt flow rate of such an extruded polymer as well as a method for reducing the polymer decomposition during processing and decreasing the melt flow rate of a polymer composition comprising polylactic acid as polymer component and at least one calcium carbonate-comprising material as filler, the use of a polymer composition obtainable by a process comprising the steps of a) providing at least one polylactic acid as polymer component, b) providing at least one calcium carbonate-comprising material as filler, c) providing at least one mono-substituted succinic anhydride and d) contacting the components of a), b) and c) in any order and e) extruding the contacted components of step d) as well as an article comprising a polymer composition obtainable by the aforementioned process.

The disclosure describes the preparation and use of reactive carbonates containing a metal carbonate bound to a reactive compound, wherein the reactive compound comprises a mineral binding group and a polymer reactive group connected together by a linking group. Such reactive carbonates are useful as reagents in processes for making mineral-bound elastomeric materials, and in methods for reducing cavitation in elastomer materials.

The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.

A process is described for the surface-treatment of a surface-reacted calcium carbonate. Also described, is a surface-treated surface-reacted calcium carbonate obtainable by the process, as well a composition including the surface-treated surface-reacted calcium carbonate . Methods of using at least one surface-reacted calcium carbonate for immobilizing at least one water soluble metal salt, water soluble metal hydroxide, water soluble metal oxide or mixtures thereof on the surface of the at least one surface-reacted calcium carbonate are also described. In addition, methods of using a surface-treated surface-reacted calcium carbonate as a preservative, for the control of odor and/or for enhancing and/or mediating antimicrobial activity of a substrate and an article including the surface-treated surface-reacted calcium carbonate are described.

This disclosure describes formulations and methods for dust control, for example, coal topping, a term which refers to the application of liquid products to the top of coal loads, such as those in open topped coal hopper railcars as commonly used today to transport coal. Disclosed herein are asphalt-based emulsion formulations that accomplish dust control during industrial operations in which dust handling is required.

The invention relates to a process for preparing self-binding pigment particle suspensions, to a self-binding pigment particle suspension as well as to a paper product comprising self-binding pigment particles and to the use of the self-binding pigment particle suspension in paper applications, such as in paper coating or as filler material.

Methods are provided for beneficially reusing a paint-saturated filter aid, such as paint-saturated alkaline earth metal carbonates, as a substitute in applications requiring virgin alkaline earth metal carbonates. The paint-saturated filter aid is prepared by re-milling paint-saturated filter aid to a predetermined size to produce re-milled particles suitable for reuse in a variety of applications, including flooring, concrete, and the like. Also provided are flooring materials including re-milled particles of a paint-saturated filter aid characterized by one or more of: a median particle size (D50) of about 1 to about 50 microns; less than about 5% of the re-milled particles being retained on a 200 mesh screen; or a top cut size (D90) of about 5 to about 300 microns.