Thickener: Also known as rheological additives, it can increase the viscosity of the coating system, viscosity is also called rheological properties, rheology The additive is also named after it. Additives with insufficient viscosity are easy to flow, showing sagging on the three-dimensional surface, and the greater the viscosity, the harder it is to sag, so thickeners can solve rheological problems.
Leveling agent: The main function of the leveling agent is to increase the fluidity of the paint, so that the paint system after painting can be better Leveling, forming a smooth, even and uniform coating film. The better the fluidity, the greater the probability of sagging.
One is to reduce fluidity and the other is to increase fluidity. Here is the contradiction between thickener and leveling agent. Improving one will definitely cause damage to the other. How to solve this problem?
In fact, either too much or too little fluidity can lead to defects. If the leveling property is too small, the coating will not level well, which will greatly affect the appearance of the paint film, the hand feeling will be rough, and the gloss will also decrease; if the leveling property is too large, it will cause sagging. Therefore, only by finding the balance between leveling and sagging can this problem be solved.
And this requires the selection of suitable thickener and leveling agent products, if not selected properly, it will cause adverse effects. If the alkali-swellable thickener thickens the water phase, the leveling property will become very poor, and the water resistance of the paint film will also decrease, so it is not suitable for use.
微信扫一扫打赏
