ISO 23900-2:2015标准是一项用于评估颜料和增白剂在塑料中分散性能的标准。本标准的第二部分主要介绍了在塑化聚氯乙烯中测定颜色特性和分散易度的方法，使用的设备是两辊磨机。

在塑料中使用颜料和增白剂时，它们的分散性能对最终产品的色彩和外观有很大的影响。因此，对颜料和增白剂的分散性能进行评估是非常重要的。本标准提供了一种可靠的方法来评估颜料和增白剂在塑料中的分散性能。

本标准的测试方法使用的是两辊磨机。首先，将颜料或增白剂与塑化聚氯乙烯混合，并在两辊磨机上进行磨合。然后，通过测量样品的色差值来评估颜色特性，并通过观察样品表面的分散情况来评估分散易度。

本标准的测试方法可以用于评估各种颜料和增白剂在塑料中的分散性能。它可以帮助制造商选择最适合其产品的颜料和增白剂，并确保它们在塑料中的分散性能符合要求。

相关标准
- ISO 23900-1:2014 Pigments and exters — Methods of dispersion and assessment of dispersibility in plastics — Part 1: General introduction
- ISO 23900-3:2015 Pigments and exters — Methods of dispersion and assessment of dispersibility in plastics — Part 3: Determination of colouristic properties and ease of dispersion of black and colour pigments in polystyrene
- ISO 23900-4:2015 Pigments and exters — Methods of dispersion and assessment of dispersibility in plastics — Part 4: Determination of colouristic properties and ease of dispersion of white pigments in polyethylene
- ISO 23900-5:2015 Pigments and exters — Methods of dispersion and assessment of dispersibility in plastics — Part 5: Determination of colouristic properties and ease of dispersion of white pigments in polypropylene
- ISO 23900-6:2015 Pigments and exters — Methods of dispersion and assessment of dispersibility in plastics — Part 6: Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene using a high-speed impeller mixer