The disclosure provides a polymer composition comprising a treated inorganic particle having improved photostability and improved anti-microbial properties, wherein the treated inorganic particle comprises: a inorganic core particle; a first treatment of a silicon compound, wherein the silicon compound is added in a single step; and a second treatment comprising a co-precipitated zinc oxide and alumina.

A solid composite material (16) combining: an inorganic pigment (10) in the form of discrete particles each comprising a colored core and a coating adapted to allow light to pass through; and a matrix (12) based on metalloid or metal oxide, said matrix being adapted to allow light to pass through.

The present invention relates to an inorganic pigment with the function of a catalyst that can be activated by light from the entire visible spectrum but also in the absence of light, to a process for obtaining it, to various formulations containing this inorganic pigment and its use. The present invention also provides a method of destroying pathogens represented by irradiating with electromagnetic radiation from the entire visible spectrum (400 nm-700 nm) the surfaces on which they have been applied-formulations containing the inorganic pigment. Additionally, the invention provides the use of the pigment disclosed herein for its catalytic, bactericidal and virucidal activity in the absence of light.

This disclosure relates to a process for preparing a treated inorganic core particle having improved dispersability comprising: (a) heating a slurry comprising porous silica treated inorganic core particle and water at a temperature of at least about 90 C.; and (b) adding a soluble alumina source to the slurry from step (a) while maintaining the pH at about 8.0 to 9.5 to form an alumina treatment on the porous silica treated inorganic core particle; wherein the treated inorganic core particle does not comprise dense silica or alumina treatments, and has silica present in the amount of at least about 7% up to about 14% and alumina present in the amount of about 4.0% to about 8.0%; and wherein the particle to particle surface treatments are substantially homogeneous.

A substrate is coated with a transparent coating film using a coating liquid for forming a transparent coating film including metal oxide particles and a matrix formation component. The metal oxide particles each include a metal oxide particle containing titanium oxide coated with silicon dioxide-stannic oxide complex oxide, including a titanium oxide-containing core particle; and a coating layer with which the titanium oxide-containing core particle is coated and that is made of silicon dioxide-stannic oxide complex oxide colloidal particles having a mass ratio of silicon dioxide/stannic oxide of 0.1 to 5.0, where one or more intermediate thin film layers that are made of any one of an oxide; a complex oxide of at least one element selected from Si, Al, Sn, Zr, Zn, Sb, Nb, Ta, and W; and a mixture of the oxide and the complex oxide are interposed between the core particle and the coating layer.

The disclosure provides a coating composition comprising a treated inorganic core particle, having improved dispersability, prepared by a process comprising: heating a slurry comprising porous silica treated inorganic core particle and water at a temperature of at least about 90 C., more typically about 93 to about 97 C., still more typically about 95 to about 97 C.; and adding a soluble alumina source to the slurry while maintaining the pH at about 8.0 to 9.5 to form an alumina treatment on the porous silica treated inorganic core particle; wherein the treated inorganic core particle does not comprise dense silica or alumina treatments, and has silica present in the amount of about 7% to about 14% and alumina present in the amount of about 4.0% to about 8.0%; and wherein the particle to particle surface treatments are substantially homogeneous.

Provided is a charge-adjustment powder having an excellent ability to regulate a charging property on a surface of a target to be charge-adjusted within a certain range, and to maintain the applied charge. The charge-adjustment powder is formed with particles having titanium-niobium oxide on at least a part of a surface of a core, and the content of an alkali metal is set to be 20.0 mmol/kg or less based on the whole.

The present invention refers to a process for producing white UV-absorbing surface-reacted calcium carbonate doped with a titanium species, comprising the steps of providing a calcium carbonate-comprising material, a calcium phosphate selected from monocalcium phosphate and/or dicalcium phosphate, and at least one titanium comprising substance, treating the calcium carbonate-comprising material with the calcium phosphate in an aqueous medium to form an aqueous suspension and grinding the aqueous suspension at a pH value of at least 4.2 to form an aqueous suspension of surface-reacted calcium carbonate, wherein the calcium carbonate-comprising material and the calcium phosphate in combination have a calcium ion to phosphate ion molar ratio (Ca.sup.2+:PO.sub.4.sup.3) in the range from 1.75:1 to 100:1, and wherein the at least one titanium comprising substance is added before and/or during and/or after the treatment step and/or before and/or during the grinding step.

The complex functional pigment according to the present invention can effectively functionalize paints while minimizing the content of pigment added to a paint composition, that is, the solid content of a paint composition, for functionalization such as heat insulation, sound insulation, beautification, weather resistance, durability, chemical resistance, antibiotic properties, surface hydrophilization/hydrophobicity and the like, and even when added in a high content in the paint composition, it has an effect of excellent dispersibility. In addition, since the color realization area of a coating film is wide, various colors can be implemented, and it also has an effect that it is easy to adjust to the desired color.

An aqueous printing ink comprised of undried, coated titanium dioxide pigment particles obtainable by a method comprising the steps of (i) providing an aqueous suspension of titanium dioxide base pigments, and (ii) forming at least one coat on said titanium dioxide base pigments as well as to an aqueous slurry containing the pigment particles. In addition, the present invention pertains to a method for obtaining said aqueous printing ink, a method for printing the aqueous printing ink onto the surface of a substrate, and a printing ink container as well as an inkjet printer comprising said ink. Finally, the present invention relates to the use of the aqueous printing ink to print a printing image onto the surface of a substrate.