涂料配方设计中，润湿分散剂对于润湿和分散效果非常重要。要选择合适的润湿分散剂，则需要在设计研磨配方之前先了解以下信息：

Wetting and dispersing agents are very important for wetting and dispersing effects in coating formulation design. To choose suitable wetting and dispersing agents, we need to know the following information before designing the grinding formulation.

涂料的应用领域：针对不同应用领域各自的特点与要求需要采用相应的润湿分散剂。

Application area of coatings: wetting and dispersing agents should be adopted according to their respective characteristics and requirements in different application fields.

涂料的类型（底漆、面漆、底色漆）：不同类型的涂料有 着不同的性能要求。

The types of coatings (primers, topcoat, primers): different types of coatings have different performance requirements.

系统的种类及极性：润湿分散剂必须与系统具有良好的相容性才能起作用。

The type and polarity of the system are: wetting and dispersing agents must have good compatibility with the system to play a role.

颜料：颜料类型（有机/无机/效应颜料/炭黑），比表面及表面化学（酸性/碱性）：不同的颜料有着完全不同的分散特点，需要与其相应的不同润湿分散剂以便在其表面形成牢固的吸附。

Pigment: pigment type (organic / inorganic / effect pigment / carbon black), compared with surface and surface chemistry (acid / alkaline): different pigments have completely different dispersing characteristics, and they need to be different wetting dispersants in order to form a solid adsorption on the surface of the pigment.

共研磨或分色研磨：前者要求一个折衷的方案，而后者则能够实现研磨条件的优化。

Common grinding or color separation grinding: the former requires a compromise plan, while the latter can achieve the optimization of grinding conditions.

有无研磨树脂：一般针对有无研磨树脂都有相应的润湿分散剂产品推荐。

There is no abrasive resin: it is generally recommended for wetting and dispersing agents with or without abrasive resin.

润湿分散剂的选择简单说就是两个方面的选择：分散剂的种类与用量。与其他所有的助剂一样，润湿分散剂的正确用量十分重要。稳定颜料的润湿分散剂的用量取决于颜料的比表面积。因为分散剂必须覆盖全部的颜料表面，具有较大表面积的颜料（即较小的粒径）就需要更多的分散剂。颜料的吸油量和BET表面积可作为分散剂用量的参考依据。

The choice of wetting dispersant is simply two choices: dispersant type and dosage. Like all other auxiliaries, the right dosage of wetting dispersant is very important. The amount of wetting dispersant of stable pigment depends on the specific surface area of pigment. Because dispersants must cover all the pigment surfaces, and larger pigments (i.e. smaller particles) require more dispersing agents. The oil absorption and BET surface area of pigment can be used as a reference for the amount of dispersant.

分散剂用量与以下几个因素密切相关

The dosage of dispersant is closely related to the following factors

与涂料的最终用途有关：出于对成本的考虑，通常建筑涂料中分散剂用量较低，而汽车涂料中则需要较高用量以获得较好的性能。

It is related to the final use of the coating: for the consideration of cost, the dosage of dispersant in the architectural coatings is usually low, and the high dosage of the automobile coating is needed to obtain better performance.

与基料的类型及化学性质有关：涂料中树脂的润湿分散作用各不相同，这会对润湿分散剂的使用量有影响。

It is related to the type and chemical properties of the base material: the wetting and dispersing effects of the resin in the coatings are different, which will affect the usage of wetting dispersant.

与润湿分散剂的化学性质有关：由于相对分子质量和化学结构的原因，低相对分子质量助剂比高相对分子质量助剂添加量要低。

It is related to the chemical properties of wetting dispersants: low relative molecular mass auxiliaries are lower than high molecular weight additives because of the relative molecular mass and chemical structure.

与颜料粒径有关：透明钛白粉需要比普通钛白粉多约5~8倍的分散剂的用量。

The size of the pigment particle and transparent titanium dioxide than ordinary titanium dioxide powder about 5~8 times the amount of dispersant.

不同相对分子质量的润湿分散剂用量

Dosage of wetting dispersant with different molecular weight