SAENPROCIDE (SAENPROCIDE) T-355 is a broad-spectrum, low toxicity, high efficiency dry film anti-mildew agent for paints. It is added to paint to prevent discoloration and degradation of materials caused by mildew on interior walls.
It is widely used in anti-mildew of paint, adhesive, color paste, wood and other materials.
Critical surface tension of silane coupling agent after film formation
The adhesion between the coating and the substrate is a manifestation of intermolecular forces. When the paint is attached, the adhesion work is required, and its size is related to the surface tension ys of the solid substrate, the surface tension y of the paint solution, the solid-liquid interfacial tension Ym, and the wetting angle Q. The greater the adhesion work, the greater the adhesion. In order to obtain the maximum adhesion work, the smaller the solid-liquid interfacial tension value Y.e, the better, and the best when Y. tends to zero. In addition, the solid surface tension y, and the liquid surface tension y. The higher the better, the smaller the wetting angle Q, the better, and the best spreading can be obtained when Q approaches zero.
However, because it is difficult to directly measure the surface tension of solids, the montan wax suppliers critical surface tension Ye is often calculated by measuring the contact angle. Therefore, the critical surface tension of the film formed by the silane coupling agent (see Table 16-5) and the critical surface tension of the coating polymer Surface tension can preliminarily determine whether the coating can wet the substrate. The critical surface tension Y. is linearly related to the solubility parameter. At a certain temperature, y. =x. At this time, it is equivalent to 8=8. At this time, the adhesion of the coating is the largest. During coating, if the solubility parameter of the coating resin and the solubility parameter of the substrate are similar, the adhesion of the coating to the substrate The best effort. Therefore, by calculating the carbon-containing functional groups in the silane coupling agent and checking the solubility parameters of the coating resin and solvent at the same time, it is helpful to select the type of coupling agent during application.
Theories about the role of silane coupling agents
Many explanations have been proposed for the mechanism of silane coupling agent in composite materials, because one statement cannot explain many phenomena. However, chemical bonding theory and physical adsorption theory are considered to be relatively successful explanations, and other explanations can also be supplemented.
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