GB2201006A - Diazotype materials - Google Patents
Diazotype materials Download PDFInfo
- Publication number
- GB2201006A GB2201006A GB08703276A GB8703276A GB2201006A GB 2201006 A GB2201006 A GB 2201006A GB 08703276 A GB08703276 A GB 08703276A GB 8703276 A GB8703276 A GB 8703276A GB 2201006 A GB2201006 A GB 2201006A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component
- component diazotype
- diazotype material
- polyvinyl acetate
- materials
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 52
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 15
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 14
- 150000001989 diazonium salts Chemical class 0.000 claims abstract description 9
- 239000012954 diazonium Substances 0.000 claims abstract description 8
- -1 ethanolamine Chemical class 0.000 claims abstract description 6
- 230000005855 radiation Effects 0.000 claims abstract description 6
- 239000006224 matting agent Substances 0.000 claims abstract description 4
- 229920000728 polyester Polymers 0.000 claims abstract description 4
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 3
- 239000004417 polycarbonate Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000000987 azo dye Substances 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000000020 Nitrocellulose Substances 0.000 claims 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 claims 1
- 229920001220 nitrocellulos Polymers 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 8
- 229920008347 Cellulose acetate propionate Polymers 0.000 abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 4
- 229920002678 cellulose Polymers 0.000 abstract description 3
- 150000001412 amines Chemical class 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 239000008119 colloidal silica Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229920013820 alkyl cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 239000011928 denatured alcohol Substances 0.000 description 1
- 229940075894 denatured ethanol Drugs 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001603 poly (alkyl acrylates) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical class [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 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
- G03C1/52—Compositions containing diazo compounds as photosensitive substances
- G03C1/60—Compositions containing diazo compounds as photosensitive substances with macromolecular additives
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
Two component diazotype materials are described comprising a support carrying a layer containing a radiation sensitive diazonium salt component and a coupler component, at a level of acidity which ensures that the components do not react, and a partially hydrolysed polyvinyl acetate as a binder. Preferably the polyvinyl acetate is hydrolysed from 15 to 50 percent and more preferably from 18 to 22 per cent. Other addenda may be present in the layers including matting agents, such as colloidal silica, and other binders. The support is preferably a water-impermeable material such as a biaxially oriented polyester, polycarbonate or cellulose ester. When developed with aqueous/solvent solutions of an amine, such as ethanolamine, the materials feel dry to the touch and do not require drying. The materials develop more rapidly than conventional materials using acrylic/cellulose acetate propionate binders.
Description
DIAZOTYPE MATERIALS
This invention relates to diazotype materials, particularly two component diazotype materials intended for liquid development.
Diazotype materials comprise a layer containing a stabilised diazonium salt which can be decomposed by actinic radiation, usually near ultra-violet radiation.
After imagewise exposure using such radiation a visible image is formed in the layer by reacting any remaining diazonium salt with a coupler to form a dye. The system is positive working as dye is only formed in the unexposed areas of-the sensitive layer. The coupler may be present in a developer solution applied to the exposed layer or it may be present in the layer itself. The former type of materials are called single component and the latter two component diazotype materials.
The sensitive layers of two component diazotype materials which contain both the diazonium compound and the coupler also include an acidic inhibitor to ensure that the layer is sufficiently acidic to prevent any reaction between the diazonium salt and the coupler. Development of two component diazotype materials is carried out by reducing the acidity of the sensitive layer to a level at which the diazonium salt and the coupler react and form an azo dye.
Treatment with ammonia vapour has been widely used as a method of developing two component diazotype materials.
This method of development provides a substantially dry developed layer but suffers from the disadvantage that toxic ammonia fumes have to be vented from the working area and developed prints initially smell of ammonia.
Two component diazotype materials may also be developed by treatment with an alkaline solution applied directly to the surface of the exposed material. Such solutions are applied at as low a coating rate as possible so that the developed print does not feel wet. In the case of paper based materials any surplus moisture is absorbed into the base but materials using a water impervious base frequently need to be dried before they can be conveniently handled.
The object of the present invention is to provide a two component diazotype material having a water impermeable base which does not feel wet after liquid development.
A further object of the invention is to provide a two component diazotype material which develops rapidly when treated with a liquid developer.
According to the present invention there is provided a two component diazotype material comprising a support carrying a layer containing a radiation sensitive diazonium salt component and a coupler component at a level of acidity which ensures that the components do not react, characterised in that the layer contains partially hydrolysed polyvinyl acetate as a binder.
There is also provided a method of developing such materials.
Preferably the polyvinyl acetate is hydrolysed up to 15 to 50 percent. Most preferably the polyvinyl acetate is hydrolysed from 18 to 22 percent. Hydrolysed polyvinyl acetates are commercially available as suspensions and as solutions in solvents such as methanol.
The sensitive layer may also contain other binders as well as the hydrolysed polyvinyl acetate including acrylic polymers, such as polyacrylic acid, poly(alkyl acrylates) and poly(alkyl acrylic) acids, and cellulose derivatives, such as cellulose acetate, cellulose acetate propionate and alkyl celluloses.
The support may be paper, such as tracing paper, or a water
impermeable material, such as polymer coated paper, a solvent cast polymer, such as cellulose acetate or a polycarbonate, or an extruded and biaxially oriented polymer,
such as polystyrene or polyester. The preferred supports
are polyethylene terephalate supports such as those sold under the registered trade marks, Mylar, 'Hostaphan' 'Estar' and 'Melinex'. The invention is of particular value when the support is water impermeable as it eliminates the need for a drying step after development.
In general the layer contains from 3.0 to 8.0 grams per
square metre of the hydrolysed polyvinyl acetate binder and
fillers. Other binders may be present giving a total coating weight from 3.0 to 8.0 grams per square metre.
The sensitive composition is coated on the support from a solvent solution containing the binder, the diazonium salt component, the coupler component and sufficient acid inhibitor to ensure that no coupling reaction takes place.
The coating composition may also contain other addenda including matting agents such as amorphous silicon dioxide sold under the trade marks 'Degussa' TS100 and 'Gasil' 200.
The coating solution will usually comprise a mixture of solvents including one or more of the solvents methanol, ethanol, methyl ethyl ketone and methyl acetate. After coating the solvents are removed by evaporation.
In use the material is exposed in contact with a
transparent or translucent original in the conventional manner using flat bed or rotary exposure apparatus. After exposure the material is developed, preferably using a liquid-developer which is applied sparingly to the sensitive surface, to render the sensitive layer sufficiently alkaline to cause coupling to take place.
Preferably the liquid developer comprises an aqueous/ solvent solution of an aliphatic amine. Such developers are described in GB-A-1 143 702 and GB-A-1 143 703.
In order to limit the amount of moisture applied to the material during development the developer solution is preferably applied at a rate less than 3.0 grams per square metre.
EXAMPLE 1.
A two component diazotype material was prepared by coating a solution having the following composition on a polyethylene terephthalate support which had been treated to promote adhesion.
2:5-diethoxy-4(p-tolylthio)-benzene diazonium chloride as -21ZnCl salt 1 g
2 2-chloro-4-N,N' -diethylamino-5-( 4-chlorophenoxy) -benzene diazonium chloride as +ZnCl2 salt 1 g 2:4-dihydroxybenzoic acid monoethanolamide 1 g
Hydrolysed polyvinyl acetate (20 percent hydrolysed) as 28 % by weight solution in methanol 30 ml
Amorphous silicon dioxide, Degussa TS 100 2 g
Denatured ethanol (industrial methylated spirit) 44 ml
Methyl ethyl ketone 10 ml
The solution was coated to provide a layer having 4 to 6 grams of solids per square metre.
The material was exposed in contact with a transparent original. After exposure the material was fed to a developing apparatus where an amine containing liquid developer was applied at a rate of 2.0 grams per square metre. The emerging material carried a dye image corresponding to the opaque areas on the original and was dry to the touch.
A similar two component material using an acrylic/cellulose ester binder, polymethylmethacrylate and cellulose acetate propionate lsec (CAP), was exposed and developed in the same manner.
It was also found that the rate of development was slower for the material using the acrylic/CAP binder. Whereas the material using the hydrolysed polyvinyl acetate binder required 10 seconds to develop an image that using the acrylic/CAP binder required 30-60 seconds.
It will thus be seen that the use of hydrolysed polyvinyl acetate as a binder according to the invention results is accelerated development and provides a dry feeling copy.
The invention has been described in detail with particular reference to preferred embodiments thereof, but it will be understood that variations and modifications can be effected within the spirit and, scope of the invention.
Claims (15)
1. A two component diazotype material comprising a support carrying a layer containing a radiation sensitive diazonium salt component and a coupler component at a level of acidity which ensures that the components do not react, characterised in that the layer contains partially hydrolysed polyvinyl acetate as a binder.
2. A two component diazotype material as claimed in claim 1, characterised in that the polyvinyl acetate is hydrolysed from 15 to 50 percent.
3. A two component diazotype material as claimed in claim 2, characterised in that the polyvinyl acetate is hydrolysed from 18 to 22 percent.
4. A two component diazotype material as claimed in any of the preceding claims, characterised in that the layer contains from 3.0 to 8.0 grams per square metre of the hydrolysed polyvinyl acetate and filler.
5. A two component diazotype material as claimed in any of the preceding claims, characterised in that the layer contains a matting agent.
6. A two component diazotype material as claimed in claim 5, characterised in that the matting agent is amorphous silicon dioxide.
7. A two component diazotype material as claimed in any of the preceding claims, characterised in that the layer contains a combination of binders.
8. A two component diazotype material as claimed in any of the preceding claims, characterised in that the support is a water impermeable material.
9. A two component diazotype material as claimed in claim 8, characterised in that the support is a biaxially oriented polyester.
10. A two component diazotype material as claimed in claim 9, characterised in that the polyester is polyethylene terephtahlate.
11. A two component diazotype material as claimed in claim 8, characterised in that the support is polycarbonate, cellulose acetate or cellulose nitrate.
12. A two component diazotype material as claimed in claim 1 and as herein described.
13. A method of forming an image on a two component diazotype material comprising imagewise exposure followed by treatment of the sensitive surface of the material with a developer solution containing an aliphatic amine, characterised in that the two component diazotype material has a composition according to any of the claims 1 to 12.
14. Methods of forming images on a two component diazotype materials as claimed in claim 13 and as herein described.
15. Materials carrying azo dye images whenever made by the method of either of the claims 13 or 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08703276A GB2201006A (en) | 1987-02-12 | 1987-02-12 | Diazotype materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08703276A GB2201006A (en) | 1987-02-12 | 1987-02-12 | Diazotype materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8703276D0 GB8703276D0 (en) | 1987-03-18 |
| GB2201006A true GB2201006A (en) | 1988-08-17 |
Family
ID=10612204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08703276A Withdrawn GB2201006A (en) | 1987-02-12 | 1987-02-12 | Diazotype materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2201006A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1169227A (en) * | 1966-11-17 | 1969-10-29 | Bexford Ltd | Diazotype Material |
| GB1488005A (en) * | 1974-01-25 | 1977-10-05 | Ici Ltd | Diazotype materials |
| EP0080241A2 (en) * | 1981-11-23 | 1983-06-01 | Océ-Nederland B.V. | Diazotype material |
-
1987
- 1987-02-12 GB GB08703276A patent/GB2201006A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1169227A (en) * | 1966-11-17 | 1969-10-29 | Bexford Ltd | Diazotype Material |
| GB1488005A (en) * | 1974-01-25 | 1977-10-05 | Ici Ltd | Diazotype materials |
| EP0080241A2 (en) * | 1981-11-23 | 1983-06-01 | Océ-Nederland B.V. | Diazotype material |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8703276D0 (en) | 1987-03-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |