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    Home > Coatings News > Paints and Coatings Market > Reasons for discoloration of floor paint and preventive techniques

    Reasons for discoloration of floor paint and preventive techniques

    • Last Update: 2020-12-21
    • Source: Internet
    • Author: User
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    "China Paint Online News"
    these common places, we often see some of the gradual color change of the phenomenon of floor paint, how do these phenomena come about? How can we prevent this phenomenon from happening, the following by Zhenjiang epoxy flooring for you to analyze the details:some are stored in the packaging barrel, a long time, epoxy floor paint will be painted after the color does not match the original color, color lightening or darkening and other phenomena. If you encounter this phenomenon, what can I do to remedy it?1, due to the density of several pigments in epoxy complex paint, in the storage process, heavy pigments will gradually sink, light pigments should gradually rise. Therefore, if the use of not fully stirred evenly, epoxy floor coating in the coating, the floor coating will be completed and the original color does not match. This is easy to solve, as long as the paint before the construction remember to fully stir evenly on it.2, if the metal powder pigment in storage, by epoxy paint residual free acid corrosion, it is easy to occur or green light phenomenon. Therefore, metal pigments and varnishes should be packed and stored separately.3, epoxy floor paint with higher acid content varnish easy to chemical reaction with iron packaging barrels, so that epoxy varnish transparency is reduced, resulting in darker colors. Do not package coatings with high acid values.4, the heat and light resistance of individual pigments in the coating is not good, some resins have poor weather resistance, easy to yellow when light, especially in epoxy resin coatings. This requires the selection of resins and pigments in the coating ratio as needed.5, epoxy floor paint in part of the pigment will sound chemical changes, loss of pigment inherent coloring force, causing discoloration or discoloration phenomenon. Therefore, when designing coating formulations, care should be taken not to use pigments that can be chemically changed with the sound of resins or main agents. Before the construction of epoxy flooring, the different types of coatings will be mixed with color, modulation is appropriate, and then used.If the acid value of epoxy flooring paint itself is higher in the stored iron bucket chemical reaction, then the color will also become darker, and if the epoxy flooring paint itself weather resistance is not good enough, after exposure to the sun will also appear yellowing phenomenon, which is The quality change of epoxy flooring paint itself, resulting in its inherent coloring force is reduced, so we should also take this into account when choosing epoxy flooring paint, in different places to take into account the aspects are also different, so that we can fundamentally avoid epoxy flooring paint color change phenomenon.We should all understand that epoxy floor paint will contain a certain amount of metal powder pigment, and if the metal powder pigment is corroded by residual free acid, the pigment will become dark green, this situation will change the color of epoxy floor paint, usually this phenomenon will occur when stored. There is also a storage when the cause of color change is caused by the density difference of pigments, the density of large sinking and low density of the rise, resulting in the pigment layering phenomenon, after layering there are obvious color differences, but these cases can be resolved by means.for this color change in the pigment itself in storage, we can be handled by full stirring, so that the separated pigment can be fully mixed, the color will be evenly presented. There are metal pigments and epoxy floor paint separate storage, but also do not use iron barrels for high acid pigment storage, we would be better to choose resin-based pigments, such pigments light resistance is also better.
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