The present invention relates to calcium carbonate particles, a powder mixture including such particles and a tooth cleaning method wherein the particles or powder mixture are used.

Hollow particles each having a shell composed of at least one layer, wherein the at least one layer contains a nitrogen atom-containing resin having a refractive index of 1.57 or less.

The present invention discloses a hydrophobic and lipophobic cosmetic pigment powder, including pigment powder and a skin-fitting treatment agent. The skin-fitting treatment agent can perform surface compounding treatment on the pigment powder and includes fluorine-containing silane and hydrogenated lecithin. The hydrophobic and lipophobic cosmetic pigment powder has excellent hydrophobic and lipophobic properties, has excellent pickable property and skin-fitting property, and makes skin elastic, soft and smooth. The perfluorinated silane treatment agent in the present invention has a carbon number less than or equal to 8, is safe, skin-friendly and nontoxic, and can achieve effects of nourishing skin and easily removing makeup due to addition of pure plant ingredients with excellent skin affinity.

The present invention relates to a composite powder of scoria powder and a porous polymer. More particularly, the present invention relates to a composite powder (scoria sphere) in which the surface and the inside of a porous polymer are uniformly impregnated with scoria powder particles prepared by spraying in one-step a dispersion in which scoria powder is dispersed in a solution in which a polymer is dissolved; a cosmetic composition containing the same; and a process for producing the same. When the scoria impregnated powder, of the present invention, in which the porous polymer is uniformly impregnated with the scoria powder particles, is formulated as a cosmetic composition, the porous polymer supplements the sebum absorption performance of the scoria miniaturized in a micro size, and thus the sebum absorption power is greatly improved.

Metal oxide powder formed of metal oxide particles, in which the metal oxide powder has first metal oxide particles having at least one protrusion portion and second metal oxide particles, the first metal oxide particles have an average primary particle diameter of 100 nm or more and 1,000 nm or less, the second metal oxide particles have an average primary particle diameter of less than 100 nm, and a fraction of a total mass of particles having a primary particle diameter of less than 100 nm in a total mass of the metal oxide powder is 0.3% by mass or more and 10% by mass or less.

The invention concerns a compound formed by functionalized micro- or nanoparticles associated covalently with rheology-modifying polymers. The invention is characterized in that the functionalized micro- or nanoparticles are functionalized micro- or nanoparticles of cerium oxide (CeO.sub.2) having a nominal diameter of between 1 and 1500 nm. The rheology-adapting or -modifying polymers are selected from among non-associative or associative polymers. The invention is used in skin protection or decontamination.

A biocidal composition may include perlite and a biocidal metal compound associated with the perlite. The perlite may have a top particle size (d.sub.50) less than 50 m and a median particle size (d.sub.50) less than 30 m, and the perlite may range from 0.1 percent to 20 percent by weight of the composition. A dentifrice composition may include perlite and a biocidal metal compound associated with the perlite. The perlite may have a top particle size (d.sub.50) less than 50 m, a median particle size (d.sub.50) less than 30 m, and exhibit an RDA value less than 220. The composition may include a toothpaste base. A method of making a biocidal composition may include providing perlite and contacting the perlite with a biocidal metal compound to form biocidal metal-treated perlite.

The present invention provides silicon oxide-coated zinc oxide in which, in a silica coating formed of a silicate alkali metal salt, the elution of zinc ions is suppressed, a method for preparing the same, a composition containing silicon oxide-coated zinc oxide, and a cosmetic material. The silicon oxide-coated zinc oxide of the present invention is silicon oxide-coated zinc oxide formed by coating surfaces of zinc oxide particles with a silicon oxide coating, in which an average primary particle diameter of the zinc oxide particles is more than 50 nm and 500 nm or less, and when held in a buffer solution having a pH of 5 for 1 hour, an elution ratio S of the zinc oxide defined by following Expression (1) is 50% or less.

Elution ratio S=(amount of eluted zinc oxide)/(amount of zinc oxide in silicon oxide-coated zinc oxide) (1)

The present invention relates to a process for producing a surface-treated calcium carbonate with improved stability in environments with a pH of 4.5 to 7, wherein calcium carbonate, at least one acid having a pK.sub.a value from 0 to 8, when measured at 20 C., and at least one conjugate base are brought into contact to form surface-treated calcium carbonate.

A skin disinfectant composition containing an aliphatic alcohol (0.1-90% w/w), a chelating agent (0.1-5%), a hydrotrope (0.1-5.0%), an acid to adjust the pH (0.01-5%), a C10 to C16 alkylbenzene sulfonate (0.1-1.0%), a chaotrope (0.01-10%), a sesquiterpenoid (0.01-1%), a skin moisturizing, conditioning and/or emollient agents (0.01- 10%) and water to balance. The composition can be a liquid, foamable or it can be a thickened gel.