Organotin compounds used as catalysts for the production of chemically adsorbed monomolecular films suffer from adversely affects on the environment and toxicity. In this study, we attempted to form a chemically adsorbed monomolecular film using a terminal alkoxysilane adsorbents and a chlorosilane compound as a novel catalyst replacing the organotin compound. Since the chlorosilane compound has high activity, it is possible to form a monomolecular film in a short time. Also, since it does not remain in the adsorbed base material, it can be expected to be applied to a wide range of applications. Therefore, we tried to form a chemically adsorbed monomolecular film from the terminal alkoxysilane adsorbent by comparing the conventional organosuccinic system with the chlorosilane-based catalyst as the catalysts. At that time, the activities were compaired under the equivalent amount of active groups and the equal weight of the catalysts. On the water drop contact angle measurement results, the contact angle of 90 ° was obtained by using the chlorosilane type catalyst in a shorter time, indicating that the activity of the chlorosilane type catalysts was higher than that of the conventional catalysts. Also on FT-IR RAS spectra measurement, since the similar peak intensities were exhibited by 180 minute adsorption with the conventional catalyst and 60 minute adsorption with the chlorosilane type catalyst. This indicate that the activity of the chlorosilane type catalysts were higher than that of the conventional organotin catalyst. If the concentration was further reduced in order to reduce the generation amount of the hydrochloric acid which was a severe problem, the reaction promoting effect was weakened, and an effect comparable to the conventional organotin catalyst was not obtained. However, it was confirmed that tetrachlorosilane (TCS), which is a representative of a chlorosilane compound, is useful for prepareing a chemically adsorbed monomolecular film using the terminal alkoxysilane adsorbents as a reaction accelerator in terms of shortening the preparationtime and reducing residual tin on the substrate.
