SPHERICAL MONODISPERSIBLE POLYESTER RESIN AQUEOUS DISPERSION, METHOD FOR PRODUCING SAME, SPHERICAL MONODISPERSIBLE POLYESTER RESIN PARTICLE, AND COSMETIC PRODUCT
申请人:Miyoshi Oil & Fat Co., Ltd.
公开号:EP3222667A1
公开(公告)日:2017-09-27
A novel technical means that can stably attain useful spherical monodispersed polyester resin particles and an aqueous dispersion thereof in an easy and inexpensive way, and a cosmetic product having fine extensibility, which has fine water resistance and smooth touch, and does not provide uncomfortable feeling to the skin.
A spherical monodispersed polyester resin aqueous dispersion, including a polyester resin dispersed in water, wherein the polyester resin has a particle average particle diameter in the range of from 1 to 1,000 µm, a sphericity in the range of from 1.00 to 1.10 as an average value of the long diameter/short diameter of the particles, and a monodispersity as a coefficient of variation from the average particle diameter and a standard deviation of 8% or less. The dispersion contains, together with the polyester resin, (A) an anionic polymer compound having an average molecular weight of 5,000,000 or more and 25,000,000 or less, and (B) a polyvinyl alcohol, as dispersing agents, at a ratio in the range of from 1/10 to 1/99 by mass ratio (A/B), and the dispersion has a viscosity in the range of from 0.1 to 5 Pa·s.
一种新型技术手段,它能以简便、廉价的方式稳定地获得有用的球形单分散聚酯树脂颗粒及其水分散液,以及一种具有良好延展性的化妆品,该化妆品具有良好的防水性和光滑的触感,不会给皮肤带来不舒适的感觉。
一种球形单分散聚酯树脂水性分散体,包括分散在水中的聚酯树脂,其中聚酯树脂的颗粒平均粒径范围为 1 至 1,000 微米,球形度作为颗粒长径/短径的平均值,范围为 1.00 至 1.10,单分散度作为平均粒径的变化系数,标准偏差为 8%或更小。该分散体与聚酯树脂一起含有(A)平均分子量为 5,000,000 或以上、25,000,000 或以下的阴离子高分子化合物和(B)聚乙烯醇,作为分散剂,其质量比(A/B)为 1/10 至 1/99,分散体的粘度范围为 0.1 至 5 Pa-s。