Factors Affecting the Fullness of Coating Resins---CFU2970A
Release time:
2019-08-13
When designing paint formulations, paint engineers desire high-gloss, high-fullness, and high-brightness coatings. However, this is often not achieved. Why is that?
The factors affecting gloss and brightness in coatings include: the wettability of resin and pigment, the compatibility of various components in the coating, the smoothness and roughness of the coating, the smoothness, fullness, and the amount of reflected and transmitted light from the coating surface. What determines fullness, and how is it described?
Although the gloss, brightness, and fullness of the coating are comprehensively affected by various components in the coating, the resin plays a key role, especially fullness, which is more closely related to the resin. Fullness generally refers to the degree of compactness of the coating observed macroscopically after film formation; in other words, the coating has minimal texture, and the surface feels smooth and round. What kind of resin produces this feeling? We know that a coating generally consists of resin, solvent, pigments (in colored paints), and auxiliaries. The solvent eventually escapes from the gaps between the resin molecules. The fewer and smaller the gaps between the resin molecules, the higher the fullness and smoothness of the coating. When pigments are present, the closer the distance between the resin and the pigment, the higher the fullness of the final coating.
Generally, resin manufacturers try to achieve this effect in three ways: First, they employ various methods to produce high-solid low-viscosity resins, thinking this solves everything, but they are unaware of the potential hazards involved. Second, increase polar groups and ensure uniform distribution of polar groups in the resin. For the first method, the size of the molecule is generally an indicator of viscosity. Low viscosity generally indicates low molecular weight. Low molecular weight often leads to a significant reduction in chemical resistance, weather resistance, and water resistance. Achieving unchanged performance is quite difficult. For the second method, it is a test of the process and cost. In today's competitive resin manufacturing industry, few manufacturers dare to do this. In view of this situation, our company has developed and produced a resin with excellent fullness and a relatively low price.CFU2970A，CFU2970AIt is a resin with excellent pigment wettability, high fullness, and excellent weather resistance.QUV313Aging1000hours, gloss loss is only10%)
For detailed performance of CFU2970A, please refer to the product Description for CFU2970A
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