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US 8,076,653 B2Granted
Dispersions of luminescent rare-earth oxide particles, varnish comprising these particles, their methods of preparation and method for marking substrates
AssigneeCommissariat a l'Energie Atomique
InventorsJorice Samuel, Olivier Poncelet, Olivier Raccurt
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Abstract
A composition including: a dispersion of particles of at least one oxide of at least one luminescent rare earth, disaggregated and stabilized in a hydrophobic liquid medium to which at least one surfactant is added, in which said surfactant is a non-ionic surfactant having an HLB (hydrophilic-to-lipophilic balance) lower than 12.
Claims27
A composition comprising:
- a dispersion of particles of at least one oxide of at least one luminescent rare earth, disaggregated and stabilized in a hydrophobic liquid medium to which at least one surfactant is added, in which said surfactant is a non-ionic surfactant having an HLB (hydrophilic-to-lipophilic balance) lower than 12.
A method comprising the following steps carried out in succession:
- adding particles of at least one oxide of at least one luminescent rare earth to a hydrophobic medium to form thereby a dispersion A;
- adding a non-ionic surfactant to dispersion A;
- and
- subjecting dispersion A containing the non-ionic surfactant to at least one mechanical action.
1 more element
Dependencies are inferred from the claim text.