Coating classification: silicone leveling agent

Core tip: for substances that can be used as leveling agent in paint system, it is required to have the following two characteristics: first, it has lower surface tension than the system, second, it has limited compatibility with the system, which together cause the leveling agent to spontaneously migrate to the surface of the paint film after being added into the paint system, and form a fixed and uniform surface on the surface The tension of the monolayer ensures that the surface tension of the paint film will not change with the change of the paint film (such as curing, solvent evaporation, etc.), so as to ensure that the paint film can be changed from unevenness under the action of the surface tension Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: For the substances that can be used as leveling agent in the paint system, the following two characteristics are required: first, it has lower surface tension than the system, second, it has limited compatibility with the system, which together lead to the leveling agent will automatically migrate to the surface of the paint film after being added to the paint system, and form a single component with fixed and uniform surface tension on the surface Sub film, this single sub film ensures that the surface tension of the paint film will not change with the change of the paint film (such as curing, solvent evaporation, etc.), so as to ensure that the paint film can be changed from uneven to flat surface under the effect of surface tension Due to the low surface tension of organosilicon chain segment and the limited compatibility with resin system, organosilicon leveling agent tends to migrate to the surface of the paint film at a faster speed, thus showing a faster leveling speed; at the same time, because organosilicon leveling agent can migrate to the surface of the paint film earlier than non silicon leveling agent, it is more helpful to eliminate the evaporation of solvent in the early drying stage of the paint film Caused by Bernal vortex Commercial silicone leveling agents are mainly polyether modified silicone oil with different structures, such as eta-733 (Sinochem products) or aralkyl modified silicone oil, such as eta-723 (Sinochem products) and polyester modified silicone oil, such as eta-710 (Sinochem products) For polyether modified silicone oil, the leveling agent changes the relative proportion of silicone to polyether and the proportion of different monomers in polyether by changing the proportion of silicone to polyether A series of organosilicon leveling agents with different properties can be obtained, and there are similar rules for the silicone oil modified by aralkyl group From the perspective of service performance, organosilicon leveling agent can mainly provide the following eight aspects of performance: leveling, leveling speed, wettability, recoating, compatibility, smoothness, low temperature foaming, anti shrinkage porosity and anti adhesion These properties are often closely related to the chemical structure of organosilicon leveling agent, among which the most important two indicators are silicon content and molecular weight In a sense, choosing the right silicone leveling agent is to choose the right silicon content and molecular weight of silicone compounds When selecting the leveling agent, you can choose it according to the specific performance requirements of the leveling agent in your formula While optimizing the required performance, pay attention to avoid some common side effects, so as to achieve balance The effect of organosilicon leveling agent is mainly short wave leveling (to eliminate all kinds of disturbance, such as Bernal vortex, which has negative effect on the leveling during the early drying of various paint films) 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,