PROBLEM TO BE SOLVED: To provide a new shape-anisotropic tabular particle having a smooth surface in one surface, and an uneven surface in the other surface formed by spherical particles, further having anisotropy in light reflectivity, and exhibiting peculiar reflection effect.SOLUTION: The shape-anisotropic tabular particle is composed of a tabular acrylic polymer particle and the spherical particles, of which one surface is the smooth surface (a) formed of an acrylic polymer 2, and of which the other surface is the uneven surface (b) formed of the spherical particles 3 protruded from the acrylic polymer. The shape-anisotropic tabular particle is produced by dissolving the acrylic polymer in a solvent, adding the spherical particles thereto to prepare a dispersion solution, spreading the dispersion solution on the surface of a liquid immiscible with the solvent to form a thin film, taking out the thin film, thereafter removing the solvent from the thin film, and pulverizing the thin film. The invention is useful for the formulation of a cosmetic.COPYRIGHT: (C)2011,JPO&INPIT【課題】一方の面が平滑面であり、他方の面が球状粒子で形成された凹凸面であって、光反射性に異方性を有し特異な反射効果を発揮する新規な形状異方性板状粉体を提供する。化粧料の配合に有用である。【解決手段】板状アクリル系重合体粒子と球状粒子からなる板状粒子であって、該板状粒子の一方の面がアクリル系重合体2で形成された平滑面aであり、他方の面がアクリル系重合体から突出した球状粒子3で形成された凹凸面bである形状異方性の板状粒子である。この形状異方性板状粒子は、アクリル系重合体を溶剤に溶解し、これに球状粒子を添加して分散溶液を調製し、該分散溶液を前記溶剤と混和しない液体表面上に展開して薄膜を形成させ、次いで、該薄膜を取り出し、その後該薄膜から溶剤を除去し、粉砕して製造できる。【選択図】図2
