Ink jet recording process using certain benzotriazole derivatives as light stabilizers
AssigneeCiba-Geigy Corporation
InventorHugh Laver
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Abstract
UV-absorbers of the formula I ##STR1## in which n is 1 to 4, R is H, C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl or C.sub.7 -C.sub.9 phenylalkyl, R.sup.1 is H, Cl, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy and R.sup.2 is an n-valent hydrophilic group, are especially suitable for the light stabilization of ink-jet prints. The compound of the formula I is here added to the recording material, preferably in a surface coating. Such compounds have the further advantage that they form particularly stable emulsions.
Claims7
An ink jet recording process wherein a recording material is stabilized against light-induced damage, comprising,
- (a) providing a sheet of recording material having a printable surface and containing an effective stabilizing amount of at least one compound of formula (I) ##STR19## in which n is 1 or 2, R is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, phenyl or C.sub.7 -C.sub.9 -phenylalkyl, R' is hydrogen, chlorine or methoxy, and R.sup.2, when n is 1, is a group of the formula ##STR20## in which u is 1-9, v is 1-6 and w is 1-6, or R.sup.2, when n is 2, is a group of the formula ##STR21## in which x is 1-7 and y is 1-4, and (b) imagewise applying an ink jet recording ink to said recording material.
Dependencies are inferred from the claim text.