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US 5,098,477 AGranted
Inks, particularly for ink printing
AssigneeCiba-Geigy Corporation
InventorsEric Vieira, Hugh S. Laver
Life of this patent
Estimating the term…
Abstract
Inks, particularly inks for ink jet printing, contain at least one compound of the formula I ##STR1## as a stabilizer. The symbols R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.3 ' and R.sub.4 ' are as defined in claim 1. The compounds are in part novel and are suitable for use as light stabilizers for organic materials.
Claims9
An ink containing as stabilizer at least one compound of formula I ##STR28## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by one or two --OH or --COO.sup.- M.sup.+ groups;
- C.sub.3 -C.sub.5 alkenyl or C.sub.3 -C.sub.5 alkynyl;
- M.sup.+ is H.sup.+ or a monovalent, divalent of trivalent metal cation,
- R'.sub.3 and R'.sub.4 independently of one another are H, C.sub.1 -C.sub.4 -alkyl, OH or C.sub.1 -C.sub.4 alkoxy,
- R.sub.3 and R.sub.4 independently of one another are H, --OR.sub.7, --COO.sup.- M.sup.+, C.sub.1 -C.sub.8 alkyl which is unsubstituted or substituted by 1 or 2 --OR.sub.5 or --COO.sup.- M.sup.+ groups;
- or allyl;
- R.sub.5 is hydrogen or C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by an OH or --COO.sup.- M.sup.+ group, and
- R.sub.7 is C.sub.1 -C.sub.4 alkyl or allyl.
4 more elements
Dependencies are inferred from the claim text.