EP0312638B1 - Matériau photographique support pour couches sensibles à la lumière sous la forme d'un papier enduit d'une couche de matière plastique ou une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription - Google Patents

Matériau photographique support pour couches sensibles à la lumière sous la forme d'un papier enduit d'une couche de matière plastique ou une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription Download PDF

Info

Publication number
EP0312638B1
EP0312638B1 EP87115556A EP87115556A EP0312638B1 EP 0312638 B1 EP0312638 B1 EP 0312638B1 EP 87115556 A EP87115556 A EP 87115556A EP 87115556 A EP87115556 A EP 87115556A EP 0312638 B1 EP0312638 B1 EP 0312638B1
Authority
EP
European Patent Office
Prior art keywords
water
support material
styrene
butadiene
methacrylate
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 - Lifetime
Application number
EP87115556A
Other languages
German (de)
English (en)
Other versions
EP0312638A1 (fr
Inventor
Eckehard Säverin
Hans-Udo Tyrakowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felex Schoeller Jr and GmbH and Co KG
Original Assignee
Felex Schoeller Jr and GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Felex Schoeller Jr and GmbH and Co KG filed Critical Felex Schoeller Jr and GmbH and Co KG
Priority to AT87115556T priority Critical patent/ATE84885T1/de
Priority to EP87115556A priority patent/EP0312638B1/fr
Priority to ES198787115556T priority patent/ES2037056T3/es
Priority to DE8787115556T priority patent/DE3783768D1/de
Publication of EP0312638A1 publication Critical patent/EP0312638A1/fr
Application granted granted Critical
Publication of EP0312638B1 publication Critical patent/EP0312638B1/fr
Priority to GR920300114T priority patent/GR920300114T1/el
Priority to GR930400642T priority patent/GR3007455T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/85—Photosensitive materials characterised by the base or auxiliary layers characterised by antistatic additives or coatings
    • 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
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/95—Photosensitive materials characterised by the base or auxiliary layers rendered opaque or writable, e.g. with inert particulate additives

Definitions

  • the invention relates to a photographic support material for light-sensitive layers in the form of a plastic-coated paper or in the form of a plastic film with a writable antistatic back coating.
  • the paper support normally consists of a wet-strength glued cellulose paper with a so-called baryta layer applied on one side and the light-sensitive emulsion above.
  • the polyolefins now also have properties which are disadvantageous for the production or treatment of such papers.
  • this plastic coating must fulfill certain properties in the course of the production and development of such photographic papers, or it must have properties that these plastics inherently have possess, be suppressed or completely eliminated.
  • the coated photographic material when passing through the various treatment baths, must not pick up and hold dirt particles on its surface, which can form in the treatment baths over time.
  • Adhesive tapes must adhere well because, among other things, is used to fasten the photographic papers present in long strips to one another in order to ensure a smooth passage through the processing machine. In all of this, the antistatic charging of the hydrophobic coating of the photographic support material should be prevented as far as possible. The electrostatic charge discharges when a certain value is reached with the formation of lightning, which can lead to the destruction of the latent image to be developed.
  • Japanese patent application JP-A-60 76744 discloses a photographic paper with a latex which contains an alkyl diphenyl ether sulfonate and / or a formalin condensation product of the naphthalene sulfonate and colloidal silica and alkali aluminate on the back of the paper coated with polyolefin on both sides.
  • these instructions do not contain any quantities and, in addition, such a coating is obviously only writable and antistatic.
  • Hydrophobic components have the disadvantage of high dirt absorption and low antistatic activity but strong electrostatic chargeability, while hydrophilic components adversely affect tape adhesion, are difficult to print and easily detach or swell in the treatment baths.
  • polar surfaces show good conductivity, that is to say antistatic properties, and low dirt absorption, but with increasing polarity, that is to say good antistatic properties, the abrasion resistance and the adhesive tape adhesion are in turn adversely affected by the action of the baths.
  • a photographic support material for light-sensitive layers in the form of a plastic-coated paper or a plastic film with a writable, antistatic back coating which contains a styrene-butadiene-methacrylate copolymer, silica and aluminum compounds, characterized in that the aqueous mixture comprising the back coating results in the following composition: a) a terpolymer latex made from styrene-butadiene methacrylate free of carboxyl and hydroxyl groups and having a solids content of between 30 and 55% by weight, 10 - 30% by weight b) silica (SiO2) with a particle size of 3 - 6 microns 0.1 - 3.0% by weight c) An aluminum-modified colloidal silica sol with an average particle size of 10-15 nm, 30% by weight in water 8 - 30% by weight d) An aqueous solution of an alkali polystyrene sulfonate, 30%
  • the coating ensures that optimum printability with tapes, writeability with pencils, minimal contamination in old oxidized development baths, minimal discoloration in the color developer, optimal adhesive tape adhesion and antistatic properties are obtained.
  • the terpolymer which is free of carboxyl and hydroxyl groups, consists of styrene-butadiene-methacrylate in an aqueous suspension with a solids content of 30 to 55% by weight. It is a latex that specifically fulfills optimal printability, adhesive tape adhesion and minimal contamination ( Tar Stain) of the backstroke of the base paper. It is the most important ingredient in the recipe because it maintains a balance between non-polar properties, which is important for optimal printability and tape adhesion results, and polar properties, which is important for tar stain reduction.
  • the amount that is added to the backside stroke is chosen so that the stroke still its strength and invulnerability in the treatment in the baths and on the other hand is only so large that the formulation does not lose its stability. These amounts are between 10 and 30% by weight, based on the total mixture.
  • the monomer ratio of the terpolymer made from styrene-butadiene-methacrylate is in the following ranges: 50-70% by weight styrene 25-40% by weight of butadiene and 5 - 15% by weight methacrylate the polymer being free of carboxyl and hydroxyl groups.
  • the silica (SiO2) with a particle size of 3 to 6 ⁇ m is responsible for being writable with a pencil.
  • the amount can vary both depending on the pencil hardness used and depending on the other constituents and also on the type of plastic of the back coating. It is between 0.1 and 3.0% by weight solids content, based on the total mixture.
  • the effect is achieved with quantities of 0.1% by weight. If the solids content is above 3.0% by weight, the bond with the binder, which, as already indicated, the latex is weakened, so that the effect is no longer entirely satisfactory.
  • the aluminum-modified colloidal silica sol in water with a particle size of 10 to 15 nm contains 30% by weight solids and is self-binding on drying by condensation of the hydroxyl groups. This connection promotes the printability of the backside coating and contributes to the antistatic finish.
  • the amount used is between 8 and 30% by weight.
  • the component d), namely the aqueous solution of the alkali salt of an organic polyacid is a substance which produces the actually antistatic effect, alkali salts of organic polysulfonic acids are preferably used.
  • the prevention of the discoloration in the baths is achieved in particular by the latex and is good to very good in the sense according to the invention.
  • a universally applicable mixture can be composed as follows: Terpolymer latex made of styrene-butadiene methacrylate in demineralized water free of carboxyl and hydroxyl groups with a solids content of 50% by weight, between 10 - 30% by weight Silicic acid, 10% in water, particle size 3 - 6 ⁇ m 0.1 - 3% by weight Aluminum modified silicic acid hydrosol, 30% in water with a particle size of 10 - 15 nm 8 - 30% by weight Sodium polystyrene sulfonic acid, 30% aqueous solution 0.5 - 5% by weight and demineralized water in an amount that gives a good spreadable consistency.
  • a preferred mixture has the following composition: Desalinated water 67.0% by weight Terpolymer latex made from styrene-butadiene methacrylate in aqueous form with 50% by weight solids content and free of carboxyl and hydroxyl groups 20.0% by weight Silica, particle size 3 - 6 ⁇ m, 1.0% by weight aluminum-modified colloidal silica sol, 30% 10.0% by weight Sodium salt of a polystyrene sulfonic acid MG 20,000, 30% aqueous solution 2.0% by weight 100% by weight
  • Fig. 1 shows strips of photographic base papers with backsheets, in which the product according to the invention is compared with the backside coated photographic base papers listed on the market listed in Table 1. It can be seen that the product according to the invention has very good properties for preventing soiling (tar stain) on the back.
  • the mixture is applied to the paper in such an amount that a layer is applied which, when dried, is 0.15 to 1.3 g / m2, but in particular is between 0.2 and 0.6 g / m2.
  • the test of the printability and the abrasion resistance or bath strength was carried out on the basis of samples with standard color ribbons. To test the samples for chemical and mechanical stresses, which can occur during the development process, they were immersed in developer for 30 seconds, wiped with a finger and, after rinsing with water, checked to see whether blurring or discolouration had occurred due to the washing out of a color component. The abrasion resistance was determined by rubbing the finger harder.
  • the adhesive tape adhesion was tested on samples using a commercially available adhesive tape, for example a 3M adhesive tape 8422.
  • the adhesive tape was pressed on and loaded with a weight of 3 kg.
  • the sample was then cut into 1.5 cm wide strips and the adhesive tape of each sample was clamped in a breaking load tester in which the adhesive tape was removed from the base at an angle of 180 ° at a speed of 20 cm / min. is subtracted. The force required to pull off is measured.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Paper (AREA)

Claims (3)

  1. Matériau photographique support pour couches sensibles à la lumière, sous la forme d'un papier enduit d'une couche de matière plastique ou d'une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription, qui contient un copolymère de styrène-butadiène-méthacrylate, de l'acide silicique et des composants de l'aluminium, caractérisé en ce que le mélange aqueux permettant d'obtenir l'enduit d'arrière-couche présente la composition suivante: a) un latex de terpolymère à base de styrène-butadiène méthacrylate exempt de groupes carboxyle et hydroxyle, avec une teneur en matières solides comprise entre 30 et 55% en poids, 10-30% en poids b) acide silicique (SiO₂) avec une granulométrie comprise entre 3 - 6 µm 0,1-3,0% en poids c) un sol d'acide silicique colloïdal modifié par l'aluminium, avec une granulométrie moyenne allant de 10 à 15 nm, à 30% en poids dans l'eau 8-30% en poids d) une solution aqueuse d'un polystyrène-sulfonate alcalin à 30% dans l'eau 0,5-5% en poids Reste: eau déminéralisée en quantité permettant d'obtenir une bonne consistance, permettant l'application à la brosse.
  2. Matériau photographique support selon la revendication 1, caractérisé en ce que le mélange aqueux permettant d'obtenir le revêtement d'arrière-couche présente la composition suivante: - eau déminéralisée 7,0% en poids - latex de terpolymère de styrène-butadiène-méthacrylate sous forme aqueuse avec une teneur en matières solides de 50% en poids et exempt de groupes carboxyle et hydroxyle 20,0% en poids - acide silicique, granulométrie 3-6 µm 1,0% en poids - sol d'acide silicique colloïdal modifié par l'aluminium, à 30% 10,0% en poids - sel sodique d'un acide polystyrène-sulfonique MG 20 000, solution aqueuse à 30% 2,0% en poids 100% en poids
  3. Matériau photographique support selon les revendications 1 et 2, caractérisé en ce que le rapport des monomères dans le terpolymère est compris dans les limites suivantes: 50-70% en poids de styrène 25-40% en poids de butadiène, et 5-15% en poids de méthacrylate,
EP87115556A 1987-10-23 1987-10-23 Matériau photographique support pour couches sensibles à la lumière sous la forme d'un papier enduit d'une couche de matière plastique ou une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription Expired - Lifetime EP0312638B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT87115556T ATE84885T1 (de) 1987-10-23 1987-10-23 Fotografisches traegermaterial fuer lichtempfindliche schichten in form eines kunststoffbeschichteten papiers oder einer kunststoffolie mit einer beschreibbaren antistatischen rueckseitenbeschichtung.
EP87115556A EP0312638B1 (fr) 1987-10-23 1987-10-23 Matériau photographique support pour couches sensibles à la lumière sous la forme d'un papier enduit d'une couche de matière plastique ou une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription
ES198787115556T ES2037056T3 (es) 1987-10-23 1987-10-23 Material de soporte fotografico para capas sensibles a la luz en la forma de un papel recubierto de materia plastica o en la forma de una hoja de materia plastica con un recubrimiento antiestatico en el lado posterior.
DE8787115556T DE3783768D1 (de) 1987-10-23 1987-10-23 Fotografisches traegermaterial fuer lichtempfindliche schichten in form eines kunststoffbeschichteten papiers oder einer kunststoffolie mit einer beschreibbaren antistatischen rueckseitenbeschichtung.
GR920300114T GR920300114T1 (fr) 1987-10-23 1993-02-17
GR930400642T GR3007455T3 (fr) 1987-10-23 1993-03-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87115556A EP0312638B1 (fr) 1987-10-23 1987-10-23 Matériau photographique support pour couches sensibles à la lumière sous la forme d'un papier enduit d'une couche de matière plastique ou une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription

Publications (2)

Publication Number Publication Date
EP0312638A1 EP0312638A1 (fr) 1989-04-26
EP0312638B1 true EP0312638B1 (fr) 1993-01-20

Family

ID=8197385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115556A Expired - Lifetime EP0312638B1 (fr) 1987-10-23 1987-10-23 Matériau photographique support pour couches sensibles à la lumière sous la forme d'un papier enduit d'une couche de matière plastique ou une feuille plastique avec un enduit d'arrière-couche antistatique et permettant l'inscription

Country Status (5)

Country Link
EP (1) EP0312638B1 (fr)
AT (1) ATE84885T1 (fr)
DE (1) DE3783768D1 (fr)
ES (1) ES2037056T3 (fr)
GR (2) GR920300114T1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735871A1 (de) * 1987-10-23 1989-05-03 Schoeller F Jun Gmbh Co Kg Fotografisches traegermaterial fuer lichtempfindliche schichten in form eines kunststoffbeschichteten papiers oder einer kunststoffolie mit einer rueckseitenbeschichtung
JP2704311B2 (ja) * 1989-10-03 1998-01-26 富士写真フイルム株式会社 写真印画紙用支持体
US5075164A (en) * 1989-12-05 1991-12-24 Eastman Kodak Company Print retaining coatings
US5221555A (en) * 1991-12-12 1993-06-22 Felix Schoeller, Jr. Gmbh & Co. Kg Reverse side coating of photographic support materials
DE4101475A1 (de) * 1991-01-19 1992-07-23 Schoeller F Jun Gmbh Co Kg Beschichtungsmasse fuer die rueckseite fotografischer traegermaterialien und verfahren zu ihrer herstellung
US5244728A (en) * 1992-02-24 1993-09-14 Eastman Kodak Company Antistat layers having print retaining qualities
GB2449306A (en) * 2007-05-18 2008-11-19 Univ Sheffield Composite particles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769020A (en) * 1971-02-11 1973-10-30 Agfa Gevaert Ag Photographic material with improved properties

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
englische Übersetzung des japanischen Dokumentes JP-A-6 076 744 *

Also Published As

Publication number Publication date
GR3007455T3 (fr) 1993-07-30
ATE84885T1 (de) 1993-02-15
ES2037056T3 (es) 1993-06-16
EP0312638A1 (fr) 1989-04-26
GR920300114T1 (fr) 1993-02-17
DE3783768D1 (de) 1993-03-04

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