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Ink compositions
| Details |
Inventors: Toan, Vien V.; Laver, Hugh S.; Leppard, David G.;
Assignee: Ciba-Geigy Corporation (Tarrytown, NY)
Primary Examiner: Bell; Mark L.
Assistant Examiner: Hertzog; Scott L.
Attorney, Agent or Firm: Hall; Luther A. R., Kovaleski; Michele A.
The invention relates to ink compositions, in particular for ink-jet printing, containing as stabiliser a water-soluble compound of formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, L, M and n are as defined in claim 1, to said compounds and to recording materials containing them, and to a process for stabilising ink-jet prints, the stabiliser being a compound of formula (I) or (II). |
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DETAILED DESCRIPTION What is claimed is: 1.
An ink composition containing as stabiliser at least one water-soluble compound of formula ##STR21## wherein R.
sub.
1 is H, C.
sub.
1 -C.
sub.
18 alkyl, C.
sub.
7 -C.
sub.
9 phenylalkyl, phenyl or a group of formula III ##STR22## R.
sub.
2 is H, C.
sub.
1 -C.
sub.
18 alkyl, C.
sub.
7 -C.
sub.
9 phenylalkyl, phenyl, a group of formula III or group of formula IV --CH.
sub.
2 CH.
sub.
2 COOR.
sub.
6 (IV); R.
sub.
3 is H, C.
sub.
1 -C.
sub.
4 alkyl; M is H, an alkali metal ion or a group (R.
sub.
7)(R.
sub.
8)(R.
sub.
9)(R.
sub.
10)N; wherein R.
sub.
7, R.
sub.
8, R.
sub.
9 and R.
sub.
10 are each independently of one another H, unsubstituted C.
sub.
1 -C.
sub.
4 alkyl or C.
sub.
1 -C.
sub.
4 alkyl which is substituted by 1 to 3 OH groups, C.
sub.
3 -C.
sub.
20 alkyl which is interrupted by one or more than one oxygen atom, or are allyl, cyclopentyl, cyclohexyl, phenyl, benzyl or tolyl; L is a direct bond, --C(R.
sub.
11)(R.
sub.
12)-- or --S--; wherein R.
sub.
11 and R.
sub.
12 are each independently of the other H or C.
sub.
1 -C.
sub.
8 alkyl; or R.
sub.
11 and R.
sub.
12, together with the linking carbon atom, form a cyclopentylene, cyclohexylene or cycloheptylene ring, each unsubstituted or substituted by 1 to 3 C.
sub.
1 -C.
sub.
4 alkyl groups; R.
sub.
4 and R.
sub.
5 are are each independently of the other H or C.
sub.
1 -C.
sub.
8 alkyl; R.
sub.
6 is M, unsubstituted C.
sub.
1 -C.
sub.
4 alkyl or C.
sub.
1 -C.
sub.
4 alkyl which is substituted by one --OH group, or is C.
sub.
3 -C.
sub.
20 alkyl which is interrupted by one or more than one oxygen atom; and n is 0 or 1.
2.
An ink composition according to claim 1, which contains a stabiliser of formula ##STR23## wherein R.
sub.
1 is H, C.
sub.
1 -C.
sub.
8 alkyl, ##STR24## phenyl or a group of formula III ##STR25## R.
sub.
2 is H, C.
sub.
1 -C.
sub.
12 alkyl or a group of formula IV --CH.
sub.
2 CH.
sub.
2 COOR.
sub.
6 (IV), M is H, an alkali metal ion or NH.
sub.
4, L is a direct bond or --C(R.
sub.
11)(R.
sub.
12)--, wherein R.
sub.
11 and R.
sub.
12 are each independently of the other H, C.
sub.
1 -C.
sub.
4 alkyl, or R
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