| 摘要 |
<p>Coating compositions suitable for application to optical surfaces to reduce surface misting and light reflection without creating haze comprise:
<UnorderedLists id="ula01" listStyle="none"><ListItem>(a) an inorganic particulate component selected from colloidal silica particles, colloidal alumina particles, or a mixture thereof wherein the silica or alumina particles have a small particle size represented by an average particle size in the range 7 to 50 nm and the particles comprise 0.5 to 2.5% weight/volume of the total composition;</ListItem><ListItem>(b) another inorganic particulate component also selected from colloidal silica particles, colloidal alumina particles, or a mixture thereof wherein the silica and alumina particles have a large particle size represented by an average particle size in the range 75 to 150 nm and the particles comprise 0.2 to 1.0% weight/volume of the total composition;</ListItem><ListItem>(c) 0.1 to 1.0% weight/volume of a polymeric binder; and</ListItem><ListItem>(d) a volatile liquid medium.</ListItem></UnorderedLists></p><p>The coating compositions provide especially beneficial properties when applied to thermoplastic films and sheets, -such as polyethylene terephthalate films. Such films are suitable as coverings or claddings for horticultural growing houses, cold frames and cloches.</p> |
