Surface cleaner
OwnerBarry Anthony Murrer, Robert J Potter +1inventors
InventorsBarry Anthony Murrer, Robert J Potter, Virginie Ogrodnik
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Abstract
The present invention relates to photocatalytic compositions effective to degrade soils deposited on a surface, to reduce the accumulation of soils on a surface, and to act as an antimicrobial agent. The invention also describes methods employing said compositions, and uses thereof.
Claims23
A composition comprising a photocatalyst, and a metal complex sensitiser comprising a ligand with a conjugated π system, which absorbs light substantially in the visible and/or the infrared region of the spectrum, effective to deposit a functional residue of said composition on a surface.
A composition as claimed in any preceding claim wherein the sensitising agent includes any one or more of the following:
- ruthenium II, III or IV or mixed oxidation state chelating complexes containing nitrogen donor atoms.
A composition as claimed in any preceding claim which is a liquid.
A composition as claimed in any preceding claim further comprising a wetting agent which is any one or more of the following:
- Igepal® CA-520 [polyoxyethylene(5) isooctylphenyl ether], Igepal® CA-630 [(octylphenoxy)polyethoxyethanol], Igepal® CA-730 [polyoxyethylene(12) isooctylphenyl ether].
A sensitising agent which includes any one or more of the following groups:
- terpyridyl, bipyridyl groups, phthalocyanines, phorphyrins, tetra-aza-annulenes, pyrazines, phenothralines and derivitives thereof and compounds with substantially similar nitrogen based ring systems.
The use of a sensitising agent according to the present invention for the sensitisation of a light absorbing agent on a surface such that soils present on the surface are substantially broken down and/or the rate of accumulation of such soils on a surface is significantly diminished.
Dependencies are inferred from the claim text.