滑石-TiO_2复合白色颜料的制备及其在涂料中的应用  

Preparation of talc-TiO_2 composite white pigment and its application in coating

作　　者：敖卫华[1] 丁浩[1] 沈凯[1] AO Weihua DING Hao SHEN Kai(School of Materials Science and Technology, China University ofGeosciences （Beijing）, Beijing 100083, China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083

出　　处：《中国粉体技术》2017年第1期19-22,共4页China Powder Science and Technology

摘　　要：采用水介质中机械力研磨复合方法制备以滑石为包核、表面包覆TiO_2的滑石-TiO_2复合白色颜料,对复合颜料的性能和结构进行表征,对其在涂料中的应用进行研究。结果表明:复合颜料的颗粒以滑石表面紧密、牢固包覆TiO_2颗粒为特征,粒径分布均匀;复合颜料性能与钛白粉相当,复合60%和70%TiO_2颜料的遮盖力分别达钛白粉的82%和98.9%;添加滑石-TiO_2复合白色颜料15%~20%的涂料涂膜对比率分别≥0.90和≥0.93,达到国标一等品或优等品指标要求,且具有良好的抗紫外老化性能。A kind of composite white pigment was prepared using the talc as cores and coating on the surface by TiO2 by means of mechano-chemical method. The properties and structure of talc-TiO2 composite white pigment were characterized, and its application in coating was studied. The results show that TiO2 particles tightly coates talc particles＇ surface. The size of composite particles distributes evenly. The composite particles has a similar pigment properties like titanium dioxide. The hiding power rates two composite powders, contenting TiO2 of 60% and70%, respectively reach 82% and 98.9% of titanium dioxide.When the amount of pigment is added to 15%-20%, the contrast ratio of these two kinds of composite pigment exceeds the value formulated by the national standard grade index required（≥0.90）and quality indexes（≥0.93）,and composite powders of titanium dioxide have a considerable ultraviolet absorption capacity.

关 键 词：滑石 二氧化钛 白色颜料 涂料 

分 类 号：TU599[建筑科学—建筑技术科学]