Acyl hydrazino thiourea derivatives as photographic nucleating agents
US4031127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1976 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Jun 29, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/48561
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Photographic nucleating agents are disclosed of the formula ##STR1## wherein R is a hydrogen, phenyl, alkylphenyl, cyanophenyl, halophenyl, alkoxyphenyl, alkyl, cycloalkyl, haloalkyl, alkoxyalkyl or phenylalkyl substituent; PA1 R.sup.1 is a phenylene or alkyl, halo- or alkoxy substituted phenylene group; PA1 R.sup.2 is an alkyl, haloalkyl, alkoxyalkyl or phenylalkyl substituent having up to 18 carbon atoms; a cycloalkyl substituent; phenyl or naphthyl; an alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituent or ##STR2## R.sup.3 is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl; THE ALKYL MOIETIES, EXCEPT AS OTHERWISE NOTED, IN EACH INSTANCE INCLUDE FROM 1 TO 6 CARBON ATOMS; AND PA1 The cycloalkyl moieties have from 3 to 10 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.