Claims
- 1. A photographic element comprising one or more silver halide photosensitive layers on a substrate, characterized in that the element includes in at least one layer free of silver halide as an antihalation dye, an antihalation effective amount of at least one compound that will provide a transmissive optical density of greater than 0.1 at the .lambda.max of the compound, said compound having the formula: ##STR9## in which: m+p=2,
- n is 0 or 1,
- s is 0 or 1,
- Z.sup.1 and Z.sup.2 independently represent the non-metallic atoms necessary to complete a heterocyclic nucleus of the type present in cyanine dyes,
- R.sup.1 and R.sup.2 are independently selected from the group consisting of alkyl or substituted alkyl, alkenyl, substituted alkenyl or aralkyl, each group containing not more than 20 carbon atoms,
- R.sup.3 and R.sup.4 are independently selected from the group consisting of a hydrogen atom or an alkyl, substituted alkyl, alkenyl or substituted alkenyl each of which groups contain not more than 10 carbon atoms,
- R.sup.5, R.sup.6, R.sup.7 and R.sup.8, which together may not contain more than 12 carbon atoms, are independently selected from the group consisting of a hydrogen atom, an alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl or alkaryl group, or
- one of R.sup.5 and R.sup.6 together with one of R.sup.7 and R.sup.8 represent the necessary atoms to complete a carbocyclic ring in which case the others of R.sup.5 to R.sup.8 are absent,
- Q.sup.1 and Q.sup.2 together represent the non-metallic atoms necessary to complete an acidic nucleus of the type present in oxonol or merocyanine dyes.
- 2. A photographic element as claimed in claim 1, characterised in that Z.sup.1 and Z.sup.2 complete a 5 or 6 membered heterocyclic nucleus which may possess substituents.
- 3. A photographic element as claimed in claim 2, characterised in that Z.sup.1 and/or Z.sup.2 complete a heterocyclic nucleus selected from the group consisting of thiazole, benzothiazole, naphthothiazole, thianaphtheno-7'-6',4,5-thiazole, oxazole, benzoxazole, naphthoxazole, selenazole, benzoselenazole, naphthoselenazole, thiazoline, 2-quinoline, 4-quinoline, 1-isoquinoline, 3-isoquinoline, benzimidazole, 3,3-dialkylindolenine, 2-pyridine, and 4-pyridine, each of which nuclei may be substituted.
- 4. A photographic element as claimed in claim 1, characterised in that Z.sup.1 and/or Z.sup.2 complete a benzothiazole or a 3,3-dialkylindolenine nucleus.
- 5. A photographic element as claimed in claim 1, characterised in that Q.sup.1 and Q.sup.2 complete a moiety which is a derivative of one of the nuclei which may optionally possess substituents selected from the group consisting of indandione, pyrazolone, isoxazolone, oxindole, 2,4,6-trioxohexahydropyrimidine, 2-thio-4,6-dioxohexahydropyrimidine, 3:5-pyrazolidinedione, 2(3H)-imidazo[1,2-a]pyridone, 5,7-dioxo-6,7-dihydro-5-thiazolo[3,2-a]pyrimidine, 2-thio-2,4-oxazolidin-dione, thianaphthenone dioxide, 2-thio-2,4-thiazolidindione, 4-thiazolinone, 2-imino-2,4-oxazolinone, 2,4-imidazolinedione, 2-thio-2,4-imindazolinedione cyclic groups, 5,5-dialkyl-1,3-cyclohexanedione or isopropylidine malonate.
- 6. A photographic element as claimed in claim 5, characterised in that the moiety completed by Q.sup.1 and Q.sup.2 contains at least one aliphatic or predominantly aliphatic group having at least 8 carbon atoms.
- 7. A photographic element as claimed in claim 6, characterised in that the moiety completed by Q.sup.1 and Q.sup.2 contains two groups which are aliphatic or predominantly aliphatic groups which together have at least 8 carbon atoms.
- 8. A photographic element as claimed in claim 5, characterised in that Q.sup.1 and Q.sup.2 complete a moiety of the general formula: ##STR10## in which: R.sup.9 and R.sup.10 are independently selected from the group consisting of a hydrogen atom, an alkyl group which may be substituted, alkenyl, substituted alkenyl, an aryl group which may be substituted or an aralkyl group, each of which groups contain not more than 25 carbon atoms.
- 9. A photographic element as claimed in claim 8, characterised in that R.sup.9 and R.sup.10 together contain at least 8 carbon atoms.
- 10. A photographic element as claimed in claim 9, characterised in that at least one of R.sup.9 and R.sup.10 represents a group containing at least 8 carbon atoms.
- 11. A photographic element as claimed in claim 10, characterised in that at least one of R.sup.9 and R.sup.10 represents an alkyl group having at least 8 carbon atoms.
- 12. A photographic element as claimed in claim 1, characterised in that n=s=0 and m=p=1.
- 13. A photographic element as claimed in claim 1, characterised in that the photographic element is a conventional wet processed photographic element.
- 14. A photographic element as claimed in claim 1, characterised in that the photographic element is a photothermographic element comprising a silver halide photothermographic element.
- 15. A photographic element as claimed in claim 1, characterised in that the dye of formula (I) is present in an antihalation backing on said substrate.
- 16. A photographic element as claimed in claim 1, characterised in that the dye of formula (I) is present as an underlayer between said substrate and said one or more photosensitive layers.
- 17. A photographic element as claimed in claim 13, characterised in that the dye of formula (I) is present in an overcoat above the photosensitive layer.
- 18. A photographic element as claimed in claim 1, characterised in that the dye of formula (I) is present in the photosensitive layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8224018 |
Aug 1982 |
GBX |
|
Parent Case Info
This is a continuation of application Ser. No. 522,482 filed Aug. 12, 1983, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1192334 |
May 1970 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
522482 |
Aug 1983 |
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