Reasons and solutions for thickening and gelatinization of epoxy floor paint

Jinfeng Epoxy Floor News: The viscosity of the epoxy floor paint construction coating increases during storage until it becomes gel like. The phenomenon of increasing viscosity due to solvent evaporation, improper use of solvents, or reactions such as oxidative polymerization is called thickening. Thickening sometimes has thixotropy or is caused by the expansion of pigments and pigments. In this case, strong vibration can restore the original consistency. Due to the reaction between the paint base and pigment, the viscosity becomes particularly high, and severe tofu like or blocky forms are called gelatinization. The phenomena of gelatinization and thickening are irreversible and different from thixotropy.

The main reason for the thickening and gelatinization caused by the construction of epoxy flooring is the reaction between the pigments used and the paint base. Salt based pigments such as zinc white and lead white react with organic acids in the paint base to form metal soaps, causing gelatinization and solidification; The container is not completely sealed or the bucket is not fully filled. During storage, some solvents evaporate, causing the paint to concentrate and thicken. Oxygen in the air can also promote gelation; The temperature in the paint storage area should not be too high, so it should not be stored under sunlight, near radiators or furnaces. Due to the increase in viscosity of paint bases containing thermosetting resins when heated, gelation occurs; Adding inappropriate diluents and using diluents with weak solubility will increase viscosity.

The solution to the thickening and gelatinization caused by epoxy floor construction is to avoid using salt based pigments for certain paint bases and replace them with pigments such as lithopone, titanium dioxide, antimony oxide, etc. The pH value of carbon black is low, and a small amount of triethanolamine is usually added to overcome it; Containers must be tightly sealed, such as after opening a bucket, and it is best to use them up within 2-3 days or a week; Choose a suitable environment for storage; Choose appropriate solvents or add solvents with strong solubility.