METHOD FOR PRODUCING SILICA PARTICLES AND THEIR USE IN COSMETIC COMPOSITIONS

• Main Authors: HORIE YUTAKA, BENJAMIN FALK, LI QINGHUA, AMAR PAWAR, SUENAGA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 16.11.2022
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; HUMAN NECESSITIES; HYGIENE; INORGANIC CHEMISTRY; MEDICAL OR VETERINARY SCIENCE; METALLURGY; NON-METALLIC ELEMENTS; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS

To provide a personal care formulation that exhibits excellent elongation, feel, and good adhesion to the skin, and causes less makeup collapse, a reduction in soft focus effect that creates uneven skin tones, and a reduction in appearance of uneven skin texture, such as pores and wrinkles.SOLUTION: Provided is a personal care formulation comprising silica particles. The silica particles comprising repeating units of (SiO4/2). The silica particles have a D90/D10 particle size distribution of about 1.3 or less as determined by a particle size analyzer utilizing a laser diffraction particle size analysis. The silica particles are spherical and have a sphericity greater than or equal to 0.9, defined as minor axis/major axis.SELECTED DRAWING: None 【課題】優れた伸び、感触、および皮膚への良好な接着、より少ない化粧崩壊、不均一な肌の色調を作るソフトフォーカス効果の低減、および毛穴およびしわなどの不均一な肌のきめを目立たなくするパーソナルケア配合物を提供する。【解決手段】（ＳｉＯ４／２）の繰り返し単位を含むシリカ粒子であって、ここでシリカ粒子は、レーザー回折粒子サイズ分析を利用した粒子サイズ分析器による測定にて、約１．３以下のＤ９０／Ｄ１０粒子サイズ分布を有し、ここでシリカ粒子は球形であり、そして短軸／長軸で定義される０．９以上の球形度を有する、シリカ粒子を配合する。【選択図】なし