Cosmetic
AssigneeJO Cosmetics Co., Ltd.
InventorHiroko KIMURA
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Abstract
A cosmetic having excellent properties in transparency, spreadability, smoothness, skin compatibility and safety is prepared using a synthetic talc that is flake-like particles containing 2:1-type laminar crystals of silicate which have a basic structure of an octahedron sheet sandwiched between two tetrahedron sheets. The flake-like particle has a mean volume particle diameter of 0.5 to 100 μm, and 0.3° or less of half width at half maximum of peak present at 2θ equal to 9.4°±1° when measured by unoriented powder X-ray diffractometry (XRD) using CuKα rays, and the cosmetic is substantially free of Mg3Si2O5(OH)4.
Claims10
A cosmetic comprising a synthetic talc, wherein the synthetic talc is a flake-like particle that has a basic structure in which an octahedron sheet is sandwiched between two tetrahedron sheets and contains a 2:1 type layered crystal of silicate represented by formula (1);
- MgxSiyO10(OH)2 (1)
- in the formula (1), x and y are values satisfying conditions of 0.50≦x/y≦1.20 and 6.5≦x+y≦7.5,
- wherein the flake-like particle has a mean volume particle diameter of 0.5 to 100 μm and 0.3° or less of half width at half maximum of peak existing at 2θ equal to 9.4°±1° when measured by unoriented powder X-ray diffractometry (XRD) using CuKα ray, and is substantially free of Mg3Si2O5(OH).
Dependencies are inferred from the claim text.