The invention relates to a color-neutral rutile pigment particle, a method for obtaining said pigment particle, and a composition comprised of said rutile pigment particle. Finally, the invention refers to the use of the rutile pigment particle in various applications.

Aqueous coating compositions providing enhanced anticorrosive and water-resistant properties. The anticorrosive coating comprises water borne resin, surface-hydrophobic inorganic pigments, and/or surface-hydrophobic inorganic extenders.

Aqueous coating compositions providing enhanced anticorrosive and water-resistant properties. The anticorrosive coating comprises water borne resin, surface-hydrophobic inorganic pigments, and/or surface-hydrophobic inorganic extenders.

Provided herein is a process for treating dregs for the application thereof as vulcanization activator of rubbers, putting an end to this residue generated in the cellulose industry and providing vulcanized rubbers with similar or enhanced properties in relation to those already known. The process for treating dregs includes the steps of: (a) drying the dregs; and (b) micronization of the dry dregs to an average particle size (d50) from 2 to 45 micrometers. Further provided herein are treated dregs, a use of treated dregs as vulcanization activator, and a process for vulcanizing rubber and the vulcanized rubber.

A method of forming a titania-coated inorganic particle comprising the steps of (a) stirring a mixture of a titania precursor such as a titanium alkoxide and an inorganic particle such as a hollow glass particles in an organic solvent such as an alcohol for more than 1 h to cause adsorption of the titania precursor on the surface of the inorganic particle; and (b) adding water dropwise to the mixture under stirring to convert the titania precursor to titania which then forms a coating on the inorganic particle. A method for forming a paint formulation, a titania-coated inorganic particle, a paint formulation comprising a titania-coated inorganic particle and use of a titania-coated inorganic particle in a paint formulation is also described.

A method of forming a titania-coated inorganic particle comprising the steps of (a) stirring a mixture of a titania precursor such as a titanium alkoxide and an inorganic particle such as a hollow glass particles in an organic solvent such as an alcohol for more than 1 h to cause adsorption of the titania precursor on the surface of the inorganic particle; and (b) adding water dropwise to the mixture under stirring to convert the titania precursor to titania which then forms a coating on the inorganic particle. A method for forming a paint formulation, a titania-coated inorganic particle, a paint formulation comprising a titania-coated inorganic particle and use of a titania-coated inorganic particle in a paint formulation is also described.

Provided herein is a process for treating dregs for the application thereof as vulcanization activator of rubbers, putting an end to this residue generated in the cellulose industry and providing vulcanized rubbers with similar or enhanced properties in relation to those already known. The process for treating dregs includes the steps of: (a) drying the dregs; and (b) micronization of the dry dregs to an average particle size (d50) from 2 to 45 micrometers. Further provided herein are treated dregs, a use of treated dregs as vulcanization activator, and a process for vulcanizing rubber and the vulcanized rubber.

Forsterite particles have an average size of 0.1 μm to 10 μm and a dielectric loss tangent of 0.0003 to 0.0025. Sphericity=(Average particle size (μm) measured with a laser diffraction particle size distribution analyzer)/(Average primary particle size (μm) calculated by conversion using specific surface area measured by a nitrogen gas adsorption method) may be from 1.0 to 3.3. This method for producing forsterite particles may include: step (A): mixing a magnesium compound as a magnesium source and a silicon compound as a silicon source so MgO/SiO.sub.2 has a molar ratio of 1.90 to 2.10 to prepare particles; step (B): putting the particles prepared in step (A) into a hydrocarbon combustion flame to recover the resulting particles; and step (C): firing the particles obtained in step (B) at 700° C. to 1100° C. The ratio between a resin and the particles may be 1:0.001 to 1000 by mass ratio.

A black IR reflective or transmissive pigment from which LiDAR responsive black coatings can be formed where the pigment displays a Blackness M.sub.y value similar to non-IR reflective carbon black. The CuO particles display small crystallites of less than 18 nm and an (−111)/(111) reflectance intensity ratio of less than 1.2. A method of forming the CuO particles includes precipitation of CuCO3 or CuCO.sub.3/Cu(OH).sub.2 using an alkali carbonate as a precipitant and calcining the precipitate at about 300° C. to about 400° C.

An object of the present invention is to provide a metal oxide particle having a surface modified with a quaternary ammonium group, and a method for producing the particle. The present invention relates to a metal oxide particle having a surface modified with a silyl group and having an aggregation ratio (average particle size measured by dynamic light scattering/average diameter of primary particles measured in an SEM image) of 5.0 or less, the silyl group being at least one group selected from the group consisting of a silyl group represented by general formula (1): —Si(X).sub.n-[L-CR.sup.1(OH)—C(R.sup.2).sub.2-A].sub.3-n (1), wherein X is the same or different, and each represents a hydroxy group or the like; n is 0, 1, or 2; L is a linkage group; R.sup.1 is a hydrogen atom or the like; R.sup.2 is the same or different, and each represents a hydrogen atom or the like; and A is a quaternary ammonium group, and a silyl group represented by general formula (2):

##STR00001##

wherein X′ is the same or different, and each represents a hydroxy group or the like; n′ is 0, 1, or 2; L′ is a linkage group; and A′ is a quaternary ammonium group.