Patterned article having alternating hydrophilic and...

Details Patterned article having alternating hydrophilic and... Patterned article having alternating hydrophilic and...

C - Chemistry, Metallurgy

08

K

C08K 3/00 (2006.01) B05D 3/06 (2006.01) B05D 3/14 (2006.01) B05D 5/00 (2006.01) C08J 7/04 (2006.01) C08K 3/22 (2006.01) G02B 1/10 (2006.01)

Patent

CA 2330116

An article with a patterned surface containing alternating hydrophobic and hydrophilic surface regions. The hydrophobic regions may be sufficiently narrow such that under dew conditions moisture accumulated on the hydrophobic region migrates to the hydrophilic region, thus preventing the accumulation of water droplets. In frost conditions, the hydrophobic region remains relatively frost-free, thus maintaining at least partial transparency of the surface. Inorganic oxide particles on the surfaces of the hydrophobic regions may provide abrasion resistance. A method for making the patterned surfaces is disclosed in which a treatment removes organic binder to expose inorganic oxide particles at the surface of the hydrophilic regions.

L'invention concerne un article à motifs comprenant des zones de surface alternées hydrophiles et hydrophobes. Les zones hydrophobes peuvent être suffisamment étroites afin que l'humidité, accumulée dans la zone hydrophobe dans des conditions de rosée, se déplace vers les zones hydrophiles, ce qui empêche l'accumulation de gouttelettes d'eau. Dans des conditions de gel, les zones hydrophobes sont à peu près exemptes de gel, ce qui leur permet de conserver une surface relativement transparente. Des particules d'oxydes inorganiques aux surfaces des zones hydrophobes peuvent leur conférer des propriétés de résistance à l'abrasion. L'invention concerne également un procédé pour fabriquer des surfaces à motifs ; selon ce procédé, un traitement permet d'enlever un liant organique pour exposer les particules d'oxydes inorganiques à la surface des régions hydrophiles.

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