| 摘要 |
<p>PURPOSE:To produce the title composite film with high surface hardness and superior washing resistance by coating the surface of a substrate with a partially hydrolyzed condensate of an alkyltrialkoxysilane and a hydrolyzate, etc. of a tetrafunctional silicon cpd., etc. in layers and completing condensation of the layers. CONSTITUTION:A hardening catalyst, a leveling agent, etc. are added to a soln. of a partially hydrolyzed condensate of an alkyltrialkoxysilane in alcohol to prepare a coating liquid. This liquid is coated onto a substrate or a molding of plastics, etc. which become easily charged. The coated liquid is then predried to accelerate condensation of the hydrolyzate as well as to remove the solvent, and before completion of the condensation the coated substrate is further coated with a soln. of a hydrolyzate or a partially hydrolyzed condensate of a tetrafunctional silicon cpd., chloropolysiloxane or alkoxypolysiloxane in a suitable solvent. The substrate is heated to complete condensation of the first and second layers as well as to volatilize the solvent, thereby giving high bonding strength between the layers. Thus, an antistatic film with good washing resistance is obtd.</p> |
