As the name suggests, the extinction agent can play the role of extinction. Although many things can be used as extinction agents, such as talcum powder, natural silica, micropowder wax, and so on, there are several fatal defects.

目前最常用的消光剂是合成微粉化二氧化硅，尤以凝胶法二氧化硅为主。（山西天一纳米材料科技有限公司是专业从事二氧化硅气凝胶的制造和研发，）这是由于凝胶法二氧化硅具有高效消光性，极佳的透明度和易分散性，对漆膜的其它性能影响小。    选择合适的消光剂由许多因素所决定。如干膜性质，就要求透 明度、漆膜爽滑、抗刮性和耐侯性。再如应用特性，如粘度、抗沉性、再分散程度和光泽一致性等。在涂料加工过程中，抗过度研磨、分散的好坏，也要认真对待。

At present, the most commonly used extinction agent is the synthesis of micropowder silica, especially the gel silica. Shanxi Tianyi nano Mstar Technology Ltd is specializing in the manufacture and development of silica aerogels. This is because the gel silica has high efficiency, excellent transparency and dispersibility, and little influence on other properties of the paint film. The choice of a suitable extinction agent is determined by many factors. Such as dry film properties, requires transparency, film smoothness, scratch resistance and weather resistance. Such as the application characteristics, such as viscosity, anti sinking, re dispersion and luster consistency. In the process of coating processing, the resistance to excessive grinding and dispersion should also be taken seriously.

一、不同性能要求下对消光剂的选择

Selection of extinction agents for different performance requirements

1、理想的消光效率

1, ideal extinction efficiency

1）选择平均粒径较大的产品。消光剂的平均粒径越大，消光效率就越高。但如颗粒太大了，会导致漆膜表面太粗糙，影响手感和外观。

1) select the products with larger average particle size. The greater the average particle size of the extinction agent, the higher the extinction efficiency. However, if the particles are too large, the surface of the film will be too rough to affect the feeling and appearance.

2）选择孔隙率（孔容）较高的产品。孔隙率越大，单位重量粉料含量就会越高，消光性能就越好。

2) select a higher porosity (Kong Rong) product. The greater the porosity, the higher the unit weight of the powder, the better the extinction performance.

2、理想的透明性

2, ideal transparency

1）选择平均粒径较小的产品。配方中同等添加量的情况下，消光剂的平均粒径越小，漆膜的透明性就越好，但相应消光效率也会降低，需要指出的是细粉含量太高，对透明度会产生负面影响。

1) select the products with smaller average particle size. The smaller the average particle size of the matting agent is, the better the transparency of the film will be, but the corresponding extinction efficiency will also decrease if the same amount of additive is added to the formula. We should point out that the fine powder content is too high, which will have a negative effect on the transparency.

2）表面处理。由于消光粉表面处理的类型不同，会影响其与基料的润湿分散性，从而会影响到漆膜的透明性。因此需要调整消光粉与基料之间的匹配性，必要时可通过添加润湿分散助剂来改善。同时还需注意是否有其他导致漆膜透明性变差的因素，如相容性较差的助剂或者差的颜料等。

2) surface treatment. Due to the different types of surface treatment, the wettability and dispersity of the material will be affected, which will affect the transparency of the film. Therefore, it is necessary to adjust the matching between the powder and the base material, and can be improved by adding the wetting dispersing agent when necessary. At the same time, we should also pay attention to other factors that lead to the poor transparency of the film, such as poor compatibility additives or poor pigments.

3、理想的爽滑效果

3. Ideal smoothness

1）通常表面经过有机处理的消光剂，手感会比没有经过处理的好一些。

1) usually the surface of the organic treatment of the extinction agent, the feeling will be better than not treated.

2）粒子大小及粒径分布。一般来说，颗粒越细的消光剂，在漆膜当中的手感越细腻。粒径分布越窄，大颗粒越少，手感一定程度上要好些。

2) particle size and particle size distribution. In general, the finer the particles are, the more delicate the hand feels in the film. The narrower the particle size distribution is, the less the large particles are, and the feel of the hand will be better to some extent.

4、理想的悬浮性  一般来说，消光剂随着涂料存放时间的延长，都会在一定程度上出现分层与沉淀，表面经过有机处理的产品防沉性能会好一些。因此配方设计时，应考虑如何避免消光粉的沉淀问题，填加适当的防沉助剂。

4, the ideal suspension property, generally speaking, with the prolongation of storage time, the matting agent will appear stratification and precipitation to some extent, and the products with surface treated by organic treatment will have better anti sinking performance. Therefore, when the formula is designed, we should consider how to avoid the precipitation of the powder and fill in the proper additives.

5、理想的表面抗刮、耐磨性  消光剂表面进行有机处理过的，会对漆膜的表面抗刮伤性及耐磨性有一定的改善

5. The ideal surface of the surface anti scraping and wear-resistant extinction agent has been treated organically, which will improve the scratch resistance and wear resistance of the surface of the film.

二、不同体系涂料对消光剂的选择

Two, selection of different system coatings for extinction

1、溶剂型涂料

1. Solvent coating

1）在透明清漆中，消光剂的加入不能在贮存时产生硬沉淀，也不能影响最终漆膜的透明度。因此，正如上面所提到的，有机物处理的消光剂是最佳的选择。用有机物处理的消光剂还可以带来另外一些好处，如表面滑爽、抗擦伤性增强等。

1) in transparent varnish, the addition of the extinction agent can not produce hard precipitation during storage, and it can not affect the transparency of the final paint film. Therefore, as mentioned above, the organic matter treatment of the extinction agent is the best choice. Delustrant processing using organic substance can also bring other benefits, such as surface smoothness, scratch resistance enhancement.

2）在色漆体系中，由于有颜料的加入，颜料的比重比消光剂大得多，所以消光剂的沉淀不是问题。出于节省成本的考虑，可以选用无表面处理的消光剂，但有时，为了改善漆膜的手感和抗擦伤性，也可以选用有机处理的消光剂。  在溶剂型体系中，消光剂的粒径要根据涂料体系的干膜厚度和所需的漆膜表面性质，比较细的消光剂会使漆膜表面比较平滑，手感较好，但其消光效率不如较粗的消光剂。而闭孔式木器漆，手感要求较高，所以要选用较细的消光剂。  消光剂的添加量取决于树脂体系，固体含量、干膜厚度、消光剂的型号、干燥方法和所要求的光泽度。需选择最佳消光剂和计算所需用量，绘制出所考虑的涂料体系在近似实际使用条件下的消光曲线。

2) in the color paint system, because of the addition of pigment, the proportion of the pigment is much larger than that of the extinction agent, so the precipitation of the extinction agent is not a problem. For cost saving considerations, no surface treatment matting agent can be selected, but sometimes, in order to improve the touch and scratch resistance of the paint film, organic finishing matte can also be selected. In solvent system, the size of matting agent depends on the dry film thickness of the coating system and the surface properties of the paint film. The fine matting agent will make the surface of the paint film smoother and feel better, but its extinction efficiency is not as good as the rough matting agent. And the closed wood lacquer, the feel of the hand is higher, so we should choose the finer extinction agent. The addition of the extinction agent depends on the resin system, the solid content, the thickness of the dry film, the type of the extinction agent, the drying method, and the required glossiness. The optimum extinction agent and the required amount needed were selected to draw the extinction curve of the coating system under the approximate actual conditions.

2、水性涂料体系  随着环保问题的日益突出，传统的溶剂型涂料正在逐渐被一些环保型涂料所取代，水性涂料，特别是用于木器的水性涂料的发展，对二氧化硅消光剂的需求也越来越多。传统的消光剂虽然可以对水性涂料进行消光，但存在许多弊端。水性涂料体系粘度较低，因此要求消光剂对其体系尽可能小地影响，即二氧化硅吸油量尽可能地小，同时也必须有利于在水性体系中分散。

2, with the increasingly prominent environmental problems, the traditional solvent coatings are being replaced by some environmentally friendly coatings. The development of waterborne coatings, especially for waterborne coatings for woodenware, is also increasing demand for silica matting agents. Although the traditional extinction agent can eliminate the water-based coatings, there are many disadvantages. The viscosity of the waterborne coating system is low. Therefore, it is required that the extinction agent can affect the system as little as possible, that is, the amount of silica oil absorption is as small as possible, and at the same time, it must also be beneficial for dispersing in the aqueous system.