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    • 67. 发明授权
    • Coated inorganic particles
    • 涂层无机颗粒
    • US5431956A
    • 1995-07-11
    • US261964
    • 1994-06-17
    • John RobbGuy Decelles
    • John RobbGuy Decelles
    • C08F2/20C08F2/18C08F2/24C08F2/44C08F292/00C09C3/10B05D7/00
    • C08F292/00
    • A novel inorganic particulate powder coated with an organic polymer is claimed. The product is obtainable by dispersing in water inorganic particles at a pH higher than their isoelectric point in the presence of a polymeric polybasic acid as a dispersing agent to produce particles having a modified isoelectric point. The pH of the dispersion is then adjusted to a value below 9 but above the modified isoelectric point and an ethylenically unsaturated monomer is polymerized in the presence of the dispersion so as to coat the inorganic particles with polymerized monomer. A method for forming the particles is also claimed.The particles prepared by the method have been shown to be uniformly and discretely coated with an organic polymeric coating and can be used in many applications where it is desired to disperse inorganic particles in organic media such as paints, inks and plastics compositions.
    • 要求保护涂有有机聚合物的新型无机颗粒粉末。 通过在聚合多元酸作为分散剂的存在下,在高于其等电点的pH下分散在水中的无机颗粒中以获得具有改性等电点的颗粒,可获得该产物。 然后将分散体的pH调节至低于9但高于改性等电点的值,并且在分散体存在下聚合烯键式不饱和单体,以便用聚合单体涂覆无机颗粒。 还要求一种用于形成颗粒的方法。 已经显示通过该方法制备的颗粒被均匀和离散地涂覆有机聚合物涂层,并且可以用于需要将无机颗粒分散在有机介质如油漆,油墨和塑料组合物中的许多应用中。