C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 125/14 (2006.01) C09D 5/00 (2006.01) C09D 5/16 (2006.01) C09D 7/12 (2006.01)
Patent
CA 2697821
De-polluting, self-cleaning coating compositions are disclosed which comprise an organic binder having dispersed therein photocatalytic titanium dioxide particles substantially in anatase form which have an average crystallite size between about 1 nm and about 150 nm and which preferably have photocatalytic activity in the presence of visible light. Advantageously, the coatings of the invention do not require pre-activation to achieve high initial photocatalytic activity against pollutants in the air, such as NOx compounds.
L'invention décrit des compositions de revêtement de dépollution, autonettoyantes qui comprennent un liant organique possédant, dispersées dans celui-ci, des particules de dioxyde de titane photocatalytiques sensiblement sous une forme anatase qui ont une taille de cristallite moyenne comprise entre environ 1 nm et environ 150 nm et qui, de préférence, ont une activité photocatalytique en présence de lumière visible. De manière avantageuse, les revêtements de l'invention ne nécessitent pas de pré-activation pour obtenir une haute activité photocatalytique initiale vis-à-vis de polluants dans l'air, tels que des composés de NOx.
Bygott Claire
Maltby Julie Elizabeth
Millennium Inorganic Chemicals Inc.
Osler Hoskin & Harcourt Llp
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