Anatase
Ti+4
RutileRutile
O-2
a c
b
Refractive Index = 2.56 Density = 3.90
d
b Tetragonal Cells
d
a = 0.951 nm
b = 0.379 nm c = 0.296 nm d = 0.459 nm
Refractive Index = 2.71 Density = 4.17
Whiteness 白度 Chemical Resistance 耐化学性
It has a neutral pH, a good resistance to alcali solutions 良好的耐碱性
TiO2 分类
Typical Pigment
crystal morphology 晶体形态
Rutile 金红石型
Micronized TiO2 微化TiO2
Introduced into automotive in the 1980’s
与90年代引入汽车工业
Characteristics 特点
Particle size---30-50 nm versus 200+ nm
纳米级
Transparent 透明性
Creates a unique effect in metallic colors
产生独特的金属效果
Golden, yellow face 正面金色效果
Pastel blue flop
侧面兰相
Others White Pigment
White Lead –铅白
该白色颜料与酸性粘接剂反应生成强硬及耐久的弹性漆膜
Anatase 锐钛型
Surface treatment 表面处理
Inorganic Treatment
Al2O3 ---抗粉化，保色 ，分散性
SiO2--耐候性 ， 提高遮盖性
Al2O3/SiO2， ZrO2
Organic Treatment--提高在弱极性体系中的分散
表面活性剂ቤተ መጻሕፍቲ ባይዱ
TiO2 Crystalline Structure
颜料分散维系小不聚集的颗粒在涂膜中提供颜色。 当颜料的不到 合适分散为正确颗粒时就的不到最佳的色调/饱和度，遮盖力，耐 候性和其他涂膜性能
Wetting 润湿
Shear / Dispersion 剪切/ 分散
Stabilization 稳定
Organic vs Inorganic Pigment
Pigment
Function in Coating 在涂料中的功能
Type of Pigment 颜料种类
Function in Coating
Colorant Hiding Filler Corrosion inhibitors Gloss
Property of Pigment 颜料的特性
Typical Pigment– TiO2
Character 性能
Titanium Dioxide contains most of the properties of an ideal white pigment ie. clarity of color, high resistance to most chemicals, organic solvents and heat, and most importantly, a high refractive index. This last property allows the
Prime(colored) Pigments 着色颜料
无机颜料 PK 有机颜料
无机颜料一般价廉，不易褪色，但不够鲜艳。
有机颜料，其特点就是鲜艳，由于是人工合成化学品，故在使用时需 试样观察与成膜主体材料有否反应，其二测试它的耐紫外性，有机颜 料产品等级非常分明，有的极易褪色，有的性能能接近无机颜料， 但价格高。
production of highly opaque coatings. 二氧化钛是一种理想的白色颜料，如颜色透明，能抵抗多数的化学物质、有机
溶剂，耐热，最重要是具有高折射率，遮盖力强。
Hiding power 遮盖力
The hiding power is influenced by the refractive index and the granulometry. Rutile has a higher refractive index and is therefore more opaque
Inorganic Pigment Organic Pigment
无机颜料
有机颜料
Effect Pigment 效果颜料
Colorant 着色颜料
Mica Pigment 云母粉
TiO2
Aluminum Pigment
铝粉
Carbon Black
Glass 玻璃粉
Red, Yellow Blue etc
Filler 填料
Conversion of pigment to paint color 将颜料转变成涂料的颜色
Pigment dispersion is required to reduce the agglomeration that occurs in the pigment drying process. This is a very important topic that I will not really be covering in this presentation. Pigment that is not at the correct particle size will not have the proper hue/chroma, hiding, durability, or other influences on film properties.
Crystal
晶体形态
Particle size
颗粒尺寸
Particle shape
颗粒形状
Water Contain
吸水性
Acidity/ Alkalescence 酸碱性
Surface area and oil absorption
表面积和吸油量
Hardness
硬度
Pigment 颜料