What is the role of silica in leather coatings?

White carbon black is now a very popular product, because of its good performance, wide application, potential function is very valuable, white carbon black has not been abandoned, the key is that the field of white carbon black is indeed too broad, today, white carbon black manufacturers Let's talk about the application of silica in leather coatings.

      The leather finishing agent is white carbon black, which has high gloss (bright) and matte. It is usually based on the gloss of matte and matte according to the necessary conditioning requirements. The fumed silica is used for matte finish to eliminate matting. Effect matting powder. The deposited matte powder is simple in appearance, and the depositional appearance is simply present in the polyurethane system. The extinction powder TS-100, TT-600 or Deshan FM-14 of Degussa gas phase method alone can be used, and the extinction effect can be deposited. It can also be handled, but the cost is high. At this time, the cooperation of Germany Wacker N20 (hydrophilic, 200 square meters / gram, uniform particle size of 12 nanometers, can reach the extinction effect, together with the cost, N20 also plays a role in anti-settling, more importantly, N20 will not fall Brilliant and fullness. WACKER N20 re-leather finishing industry has been widely used, leather finishing is mainly distributed in Jiangsu, Zhejiang, Fujian and other three provinces.

      The so-called extinction, also known as matte, is the physical uniform enthalpy of the nano-small particle re-system. Zinc stearate, when the light passes through the period, is reflected by the continuous reflection of these small particles, so-called total reflection, so that the light can not Launched, so that the appearance looks dark and dull.

The best choice for precipitation silica manufacturers depends on the consistency of the system. Sometimes we advocate first dispersing all of the fumed silica with some liquid or some formulation materials, and then participating in the remaining liquid and other formulation materials to condition the fumed silica content to reach the formulation demand share. In principle, silica-based fumed silica is added in accordance with the reduction of the fundamental particle size. However, with the addition of fineness of the particles, the higher shear force is required to reach its thickening effect. .

       The role of fumed silica depends to a large extent on the strength of the dispersion, and at least the need to use a high-speed disperser to disperse. To reach the best silica black smashing effect, you can use the rotor must be stator or smashing or ball smashing machine, the three-roller smashing, and the ultrasonic smashing equipment.

       The above is about the use of white carbon black in leather paint. Have you all understood it? We will continue to introduce the role of white carbon in other fields. Please continue to pay attention.