Paint common sense: how to solve the problem of paint swelling for novice

Core tip: the container is not completely closed or full, part of the solvent volatilizes during the storage process, so that the paint can be concentrated, thickened, and the oxygen in the air can also promote gelation In the process of production and storage of environmental protection coatings, the mixing of water can promote the reaction of acid paint and alkaline paint, which often leads to the phenomenon of coating liver or gelation If the storage temperature is too high, it will also bring some disadvantages such as hepatosis and gelatinization Most of the dispersed phase of the base material of the colloid has positive charge The main reason for the viscosity of the paint is that the pigment used reacts with the base resin For example, the paint with high acid value and the base pigment have saponification reaction in the storage process And negative 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: the container is not completely closed or filled with barrels Some solvents volatilize during the storage process, which makes the paint concentrate, thicken and oxygen in the air can also promote gelation In the process of production and storage of environmental protection coatings, the mixing of water can promote the reaction of acid paint and alkaline paint, which often leads to the phenomenon of coating liver or gelation If the storage temperature is too high, it will also bring some disadvantages such as hepatosis and gelatinization Most of the dispersed phase of the base material of the colloid has positive charge The main reason for the viscosity of the paint is that the pigment used reacts with the base resin For example, the paint with high acid value and the base pigment have saponification reaction in the storage process Mixing, mutual attraction and neutralization with negatively charged pigments cause gelation and solidification Excessive polymerization, viscosity increase or gel formation of oil The phenomenon of false thickness mainly appears in the paint with high pigment content, while talcum powder, zinc oxide, lithopone and red lead powder are the most obvious, and the brush marks are not easy to disappear when brushing At the same time, the addition of some anti precipitation agents, such as fumed silica, organobentonite, imported additives and so on, makes the coating have the characteristics of false consistency, so as to prevent precipitation and form thick paste coating The phenomenon of coating swelling shows that the coating looks thick on the surface, but it can flow freely after mechanical mixing, and it can recover the original phenomenon after stopping mixing The environmental protection coating is viscous and cannot be stirred The consistency of hepatism has increased to a level that requires excessive dilution before use or is still difficult to use It is gelatinous and similar to liver mass The phenomenon that the gelled coating changes from a liquid state to a solid or semi-solid state that cannot be used The fine pigment particles are lumpy and granular, and the viscosity is increased to form jelly Pseudothicknesses are also called pseudothicknesses or thixotropies The preventive measures for paint swelling shall be used on the same day of preparation In general, the coating with liver can be thinned by adding corresponding diluent when it is light, but it can only be used as primer, and if it is used as finish, it will lose light It can no longer be used It shall be degraded or scrapped In the case of gelation, if the oil is over polymerized, this is a physical change It is a temporary phenomenon It can be redispersed by mechanical agitation, or a small amount of organic acid can be restored to normal Carbon black has a low pH value, which is usually overcome by adding a small amount of triethanolamine When the coating is slightly gelatinized, the same diluent can be added generally, and the coating will be changed into uniform liquid again after forced mixing When tung oil is gelatinized, 3% glycerol can be added and heated in a short period of time to restore it to its original state If the gelation is serious and irreversible, it can only be scrapped or used for putty mixing The container containing the paint must be sealed If it is sealed after use, it is better to use it within 23 days For the gelled part, it can be filtered out and degraded for use In the production of environmental protection coating, prevent the mixing of water If in the case of high humidity, do not produce paint Some pigments and fillers that are easy to absorb water should be dried and heated in the sun to remove the moisture and prevent the moisture from mixing in the solvent Store the paint at 15-25 ℃, do not place it near the sun, radiator or furnace The phenomenon of false thick and false thick can be recovered as long as it is strongly stirred with a wooden stick This is also a method of forming thick film environmental protection coating When brush coating is used in the coating process, especially high-pressure airless spraying, the coating can be easily coated due to the existence of shear external force flow; once the external force disappears, the coating will have false thickening phenomenon, forming a thick coating without sagging This is the characteristic of some kind of coating, which can not be treated as morbid When coating thick film coating, it is not allowed to add more diluent without authorization, and it is necessary to ensure the specified film thickness As a decorative coating, the phenomenon of false consistency is a disadvantage, because it will produce serious brush marks, affecting the beauty and decorative performance of the film 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,