C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 251/68 (2006.01) D06L 3/12 (2006.01) D21H 21/30 (2006.01)
Patent
CA 2390035
Water soluble, amphoteric optical brighteners (W) comprising at least one brightener-characteristic radical X which contain at least one anionic substituent and covalently linked over at least one tertiary amino group Z to at least one non-chromophoric, essentially aliphatic, polyquaternary ammonium- hydrocarbon radical Y containing more than one quaternary ammonium group and in which each hydrocarbon radical is optionally interrupted by and/or substituted with one or more further heteroatoms, have surprising brightening properties, especially in papermaking, and in the form of their aqueous solutions are of notable stability.
L'invention concerne des azureurs optiques amphotères hydrosolubles (W) comprenant au moins un radical (X) à caractéristique d'azureur comportant au moins un substituant anionique lié par covalence sur au moins un groupe amino tertiaire (Z) à au moins un radical (Y) hydrocarboné non chromophore, essentiellement aliphatique à ammonium polyquaternaire renfermant plus d'un groupe ammonium quaternaire et dans lequel chaque radical hydrocarboné est éventuellement interrompu par et/ou substitué avec un ou plusieurs hétéroatomes, présentent, de manière surprenante, des propriétés de brillance, surtout dans la fabrication de papier. Sous forme de solutions aqueuses, ces azureurs sont d'une stabilité remarquable.
Farrar John Martin
Jackson Andrew Clive
Clariant Finance (bvi) Limited
Kirby Eades Gale Baker
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