超耐候性TiO_2颜料的包膜工艺  

Coating Technology of Super-Weatherable TiO_2 Pigment

作　　者：李文生[1] 张天永[1] 陈贵山[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]中核华原钛白股份有限公司,甘肃兰州732850

出　　处：《化学工业与工程》2007年第1期36-39,共4页Chemical Industry and Engineering

摘　　要：耐候性是TiO2颜料的一项重要性能，采用致密硅包膜新工艺将使TiO2颜料具有超耐候性，本文从包膜荆加入方式、包膜荆加入量、温度、pH值等方面对超耐候性包膜工艺进行研究，讨论了致密硅包膜原理，用酸溶率评价包膜效果。在并流加入方式、包膜荆加入量3．5％、温度90℃、pH值为9．5—10和Al2O3，包覆的条件下制备出超耐候性TiO2颜料，其抗老化试验结果超过6000h。Weatherability is one of important capabilities for TiO2 pigment. The super-weatherability of TiO2 pigment is obtained by a new fine SiO2 coating preparation method, The effects such as adding method and adding amount of coating agent, temperature and pH, etc, on super-weatherability were analysed. The mechanism of fine SiO2 coating was discussed and acid solubility was adopted to identify coating effect. The TiO2 pigment with super-weatherability was produced under the condition that adding method is parallelcurrent,adding amound of coating agent is 3.5%, t = 90 ℃, pH = 9.5-10, Al2O3 is used as coating material. The resuh of anti-ageing experiment is above 6 000 h.

关 键 词：超耐候性 二氧化钛 致密硅包膜 酸溶率 

分 类 号：TQ621.12[化学工程—精细化工]