申请人:——
公开号:US20030215572A1
公开(公告)日:2003-11-20
A process for preparing composite particles having a coating of an organic compound on their surfaces, comprising the steps of (a) dissolving an organic compound in supercritical carbon dioxide to give an organic compound solution; (b) contacting particles which do not dissolve in the supercritical carbon dioxide with the organic compound solution in a vessel; and (c) reducing the internal pressure of the vessel at an internal temperature of not less than the critical temperature of carbon dioxide. The composite particles have controlled properties such as water repellency, oil repellency, optical properties, ultraviolet shielding ability, texture, safety, activity, color tone, stability of dispersion and weatherproof, which can be suitably used for paints, ink-jet ink and cosmetics, and the composite particles obtained.
一种制备表面具有有机化合物涂层的复合颗粒的工艺,包括以下步骤:(a) 将有机化合物溶解在超临界二氧化碳中,得到有机化合物溶液;(b) 将不溶解在超临界二氧化碳中的颗粒与容器中的有机化合物溶液接触;(c) 在不低于二氧化碳临界温度的内部温度下降低容器的内部压力。该复合微粒具有可控特性,如拒水、拒油、光学特性、紫外线屏蔽能力、质地、安全性、活性、色调、分散稳定性和耐候性,可适当用于涂料、喷墨墨水和化妆品,所获得的复合微粒。