Floating problem caused by curing agent

After the coating is cured and formed into a film, the separation phenomenon will occur due to the use of the floor material. The main reason is related to the particle size, crystallization, molecular polarity and surface charge of the pigment. Generally, the separation is divided into vertical separation and horizontal separation. Vertical separation is generally called blooming, and horizontal separation is generally called floating color. In the same material A, after changing the curing agent, floating color occurs. This situation shows that there is no problem with the particle size and crystallization of the pigment. The main problem is the molecular polarity of the color. Because inorganic pigments are divided into polar and non-polar, at the same time, the diluent in the curing agent is also divided into polar solvents and non-polar solvents, sometimes the molecular polarity of A material is the same as that of the diluent in a curing agent. The polarity is just the opposite, and the curing agent does not produce floating color. After changing the floor curing agent, floating color occurs, which is only related to the molecular polarity of the color. Generally, adjust the dispersant to reduce the polarity, or in Add an appropriate amount of silicon coupling agent to material A to reduce the polar repulsion phenomenon and increase the aggregation force of inorganic pigments and organic pigments.