A METHOD OF MAKING AN ABRASION RESISTANT COATING ON A SOLID SUBSTRATE AND ARTICLES PRODUCED THEREBY

摘要

Method for providing an improved abrasion resistant coating on solid substrates such as plastic articles and solid articles prepared thereby having on the surface such abrasion resistant coating. A solid substrate is coated with an organosilanol-type coating liquid comprising organosilanol molecules or a partial condensation product thereof. At least 90 mole percent of said organosilanol molecules are trifunctional silanol molecules of the formula RSi (OH)3, R being a hydrocarbon radical, and at least 50 mole percent of said trisilanols being an alkyl trisilanols of 1-3 carbon atoms or phenyl trisilanol. Preferably, at least 70 mole percent of the trisilanol is methyltrisilanol. After the coating is cured by a conventional means, it is post-treated by a glow discharge to afford an abrasion resistance far superior to those obtained from organosilanol coating liquids without glow discharge post-treatment. There is also disclosed a mirrored solid substrate such as a plastic sheet having an improved abrasion resistance which comprises a layer of a glow discharge treated organosiloxane coating and a mirror layer deposited thereon.