GB873937A - Improvements in or relating to direct positive emulsions - Google Patents
Improvements in or relating to direct positive emulsionsInfo
- Publication number
- GB873937A GB873937A GB3987358A GB3987358A GB873937A GB 873937 A GB873937 A GB 873937A GB 3987358 A GB3987358 A GB 3987358A GB 3987358 A GB3987358 A GB 3987358A GB 873937 A GB873937 A GB 873937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- direct positive
- allyl
- positive emulsions
- bromide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000839 emulsion Substances 0.000 title 1
- 150000003839 salts Chemical group 0.000 abstract 2
- JQZAEUFPPSRDOP-UHFFFAOYSA-N 1-chloro-4-(chloromethyl)benzene Chemical compound ClCC1=CC=C(Cl)C=C1 JQZAEUFPPSRDOP-UHFFFAOYSA-N 0.000 abstract 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 abstract 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- BHELZAPQIKSEDF-UHFFFAOYSA-N allyl bromide Chemical compound BrCC=C BHELZAPQIKSEDF-UHFFFAOYSA-N 0.000 abstract 1
- 150000001450 anions Chemical group 0.000 abstract 1
- 125000003710 aryl alkyl group Chemical group 0.000 abstract 1
- AGEZXYOZHKGVCM-UHFFFAOYSA-N benzyl bromide Chemical compound BrCC1=CC=CC=C1 AGEZXYOZHKGVCM-UHFFFAOYSA-N 0.000 abstract 1
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 abstract 1
- 229940073608 benzyl chloride Drugs 0.000 abstract 1
- VRZVPALEJCLXPR-UHFFFAOYSA-N ethyl 4-methylbenzenesulfonate Chemical compound CCOS(=O)(=O)C1=CC=C(C)C=C1 VRZVPALEJCLXPR-UHFFFAOYSA-N 0.000 abstract 1
- HVTICUPFWKNHNG-UHFFFAOYSA-N iodoethane Chemical compound CCI HVTICUPFWKNHNG-UHFFFAOYSA-N 0.000 abstract 1
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 abstract 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/485—Direct positive emulsions
- G03C1/48515—Direct positive emulsions prefogged
- G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pyridine Compounds (AREA)
Abstract
Quaternary salt of the general formula:-<FORM:0873937/IV (b)/1> wherein R is an alkyl, allyl or halogen-substituted or unsubstituted aralkyl group and X is an anion, the quaternized pyridinium ring being joined to the vinyl group in 2- or 4-position, are prepared by reacting the corresponding bases with salts of the formula RX. Examples are given of the reaction of 1:2-dipyridylethylenes with benzyl chloride, benzyl bromide, p-chlorobenzyl chloride, methyl iodide, ethyl iodide, allyl bromide or ethyl toluene p-sulphonate. Specifications 843,363, 850,482 and 871,938 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3987358A GB873937A (en) | 1958-12-10 | 1958-12-10 | Improvements in or relating to direct positive emulsions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3987358A GB873937A (en) | 1958-12-10 | 1958-12-10 | Improvements in or relating to direct positive emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB873937A true GB873937A (en) | 1961-08-02 |
Family
ID=10411948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3987358A Expired GB873937A (en) | 1958-12-10 | 1958-12-10 | Improvements in or relating to direct positive emulsions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB873937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314796A (en) * | 1962-04-11 | 1967-04-18 | Agfa Ag | Direct positive emulsions |
-
1958
- 1958-12-10 GB GB3987358A patent/GB873937A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314796A (en) * | 1962-04-11 | 1967-04-18 | Agfa Ag | Direct positive emulsions |
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