Back to results
US 5,958,663 AGranted
Color-photographic recording material
AssigneeCiba Specialty Chemicals Corporation
InventorSuruliappa Jeganathan
Life of this patent
Estimating the term…
Abstract
The invention relates to a colour-photographic recording material which comprises a magenta coupler and, as stabilizer, at least one compound of the formula ##STR1## where the radicals are as defined in claim 1, and to the novel stabilizers.
Claims8
A color-photographic recording material which comprises a magenta coupler and, as stabilizer, at least one compound of the formula ##STR65## where p is a number from 1 to 18;
- R.sub.3, R.sub.4, R.sub.5 and R.sub.6, independently of one another, are hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.8 alkoxy, C.sub.5 -C.sub.7 cycloalkyl, phenyl, phenyl-C.sub.1 -C.sub.4 alkyl or halogen;
- R.sub.24 is --Si(R.sub.11)(R.sub.12)(R.sub.13) or a group of the formula ##STR66## in which q is a number from 0 to 12;
- R.sub.25 is hydrogen or C.sub.1 -C.sub.18 alkyl;
- and
- X.sub.1 is O, S, SO, SO.sub.2 or NR.sub.18 ;
- in which R.sub.18 is hydrogen, C.sub.1 -C.sub.18 alkyl, --CH.sub.2 CH(OH)CH.sub.2 O(C.sub.1 -C.sub.14 alkyl) or --CO--R.sub.19 ;
- in which R.sub.19 is C.sub.1 -C.sub.18 alkyl.
4 more elements
A compound of the formula:
- where
- p is a number from 1 to 18;
- R.sub.3, R.sub.4, R.sub.5 and R.sub.6, independently of one another, are hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.8 alkoxy, C.sub.5 -C.sub.7 cycloalkyl, phenyl, phenyl-C.sub.1 -C.sub.4 alkyl or halogen;
- R.sub.24 is --Si(R.sub.11)(R.sub.12)(R.sub.13) or a group of the formula ##STR72## in which q is a number from 0 to 12;
- R.sub.25 is hydrogen or C.sub.1 -C.sub.18 alkyl;
- and
- X.sub.1 is O, S, SO, SO.sub.2 or NR.sub.18 ;
- in which R.sub.18 is hydrogen, C.sub.1 -C.sub.18 alkyl, --CH.sub.2 CH(OH)CH.sub.2 O (C.sub.1 -C.sub.14 alkyl) or --CO--R.sub.19 ;
- in which R.sub.19 is C.sub.1 -C.sub.18 alkyl.
6 more elements
Dependencies are inferred from the claim text.