First of all, the particle properties of high temperature resistant iron oxide yellow pigment are one of the key factors. If the pigment particles are large and the particle size distribution is uneven, agglomeration is likely to occur, making dispersion difficult. For example, coarse-grained iron oxide yellow pigment is difficult to disperse evenly in media such as paint or plastic, affecting the color and performance consistency of the product.
Secondly, the properties of the pigment surface cannot be ignored. Untreated pigment surfaces may have high surface energy and tend to adsorb together. Moreover, if there are impurities or oil stains and other contaminants on the surface, it will further hinder its dispersion in the dispersion medium and reduce the compatibility with the matrix material.
Furthermore, the properties of the dispersion medium have a significant impact on pigment dispersion. Different solvents or resin systems have different parameters such as polarity and viscosity. If the polarity of the dispersion medium and the pigment do not match, the pigment will be difficult to disperse stably in it, and precipitation or flocculation may occur.
In addition, dispersion processes and equipment also play an important role. If the stirring speed, time, selection and dosage of dispersant are unreasonable, the pigment will not be fully dispersed. For example, if the stirring speed is too slow or the time is too short, the pigment cannot be dispersed evenly in the system; and if the amount of dispersant is inappropriate, the attraction between pigment particles may not be effectively reduced, affecting the dispersion effect.
Corresponding solutions can be taken to address these influencing factors. For the problem of pigment particles, the particle size and distribution range can be controlled by optimizing the crushing and classification process to make them smaller and more uniform, and reduce the tendency of agglomeration.
In terms of pigment surface treatment, surface modification technology, such as coupling agent treatment, is used to reduce surface energy, enhance affinity with the dispersion medium, and improve its dispersion stability in the system.
Select the appropriate dispersion medium. According to the properties and application requirements of the high temperature resistant iron oxide yellow pigment, determine the medium with matching parameters such as polarity and viscosity through experiments to promote the dispersion of the pigment.
Optimize the dispersion process and equipment, determine reasonable stirring speed and time, screen efficient dispersants according to the characteristics of the pigment and dispersion medium, and accurately control their dosage to ensure that the pigment can achieve a good dispersion state in the system, so as to give full play to high temperature The performance advantages of resistant iron oxide yellow pigment can meet the needs of various high-temperature application scenarios and improve product quality and stability.
