Common knowledge of coating: causes of coating precipitation and caking

The key points are as follows: (1) the pigment used is not finely ground and poorly dispersed; in the formula, the factors such as the ratio of pigment to base is too large and the density of pigment and filler is large are easy to cause precipitation (2) Due to the addition of too many diluents and the low viscosity of the coating, the coating lost its normal surface suspension state, resulting in the precipitation of pigments and fillers (3) there is chemical polymerization or adsorption between the pigment and the resin, resulting in gelation and precipitation (4) The storage time is too long, which exceeds the retention period of the coating, especially for a long time The color paint is stored for a long time, and the pigment and filler form a precipitate at the bottom of the container due to the high density, and finally Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: (1) the pigment used is not finely ground and poorly dispersed; in the formula, factors such as the ratio of pigment to base is too large and the density of pigment and filler is large are easy to cause precipitation (2) due to the addition of too many diluents and the low viscosity of the coating, the coating lost its normal surface suspension state and the pigments and fillers precipitated (3) there is chemical polymerization or adsorption between the pigment and the resin, resulting in gelation and precipitation (4) the storage time is too long, which exceeds the retention period of the coating, especially the long-time static storage The storage time of color paint is too long Because of the high density of pigments and fillers, the precipitate is formed at the bottom of container, and finally the harden is formed Some resins also deteriorate (5) if the storage temperature is too high, the storage temperature of general coating should be 15 ~ 25 ℃ When the temperature is over 30 ℃, the suspension property of some pigments and resins in the paint is destroyed, which makes the viscosity of the paint reduce and precipitate and agglomerate Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,