US3497358A - Gelatin compositions containing an aldehyde type hardener and an aliphatic monocarboxylic acid - Google Patents

Gelatin compositions containing an aldehyde type hardener and an aliphatic monocarboxylic acid Download PDF

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Publication number
US3497358A
US3497358A US452880A US3497358DA US3497358A US 3497358 A US3497358 A US 3497358A US 452880 A US452880 A US 452880A US 3497358D A US3497358D A US 3497358DA US 3497358 A US3497358 A US 3497358A
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US
United States
Prior art keywords
gelatin
acid
formaldehyde
hardening
hardener
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
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US452880A
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English (en)
Inventor
Albert L Sieg
Merrill W Killick
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Eastman Kodak Co
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Eastman Kodak Co
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Publication of US3497358A publication Critical patent/US3497358A/en
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00Photosensitive materials
    • G03C1/005Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/30Hardeners

Definitions

  • the sodium salts of acetic acid, formic acid, oxalic acid, benzoic acid, carbonic acid, phthalic acid and adipic acid are illustrative of the water soluble salts of an unsubstituted carbon acid.
  • This invention relates to the hardening of photographic gelatin layers by the combination of an aldehyde-type hardener and a water soluble salt of a carbon acid.
  • One object of our invention is to make possible an increase in the amount of hardening obtained with a given amount of formaldehyde in a gelatin photographic layer. Another object of our invention is to provide a means of increasing the hardening from formaldehyde when used in gelatin layers without being accompanied by stain. A further object of our invention is to provide a means of increasing the degree of hardening imparted by an aldehyde hardener in a gelatin composition without developing undesirable photographic effects such as tone changes and increased fog levels.
  • a still further object of our invention is to provide gelatin coating compositions having therein aldehyde hardener and a water soluble salt of a carbon acid which exerts a synergistic effect upon the hardening characteristics of the aldehyde hardener.
  • acetic acid formic acid, oXalic acid, benzoic acid, propionic acid, butyric acid, carbonic acid, caprylic acid, malonic acid, phthalic acid, adipic acid, etc.
  • our invention is useful in hardening various types of gelatin and is particularly effective on pigskin gelatin, however, other types of gelatin such as bone belatin, hide gelatin and the like are also included.
  • the gelatin has a jelly strength of not less than 50 grams bloom and it is gelatins of good jelly strength which are particularly useful in the compositions in accordance with the invention.
  • the compositions in accordance with the invention there should be incorporated at least 1% of the salts based on the weight of the gelatin, the preferable proportion of salts being within the range of 5-15% based on the weight of the gelatin.
  • the gelatin coating compositions employed for applying photographic gelatin layers in accordance with the invention are aqueous in nature but can tolerate up to as much as 10% of water soluble solvents such as alcohol, acetone or the like.
  • EXAMPLE 1 A sample of pigskin gelatin of good jelly strength was dissolved in water to produce a solution of which the gelatin is 10% by weight. 0.5% of formaldehyde based on the dry weight of the gelatin was added to the solution. The solution was then separated into five equal parts and the following variations were made:
  • the brush-off point of each sample was determined.
  • the brush-off point is a melting point determination carried out under mildly abrasive conditions. The higher the temperature of brush-off, the harder and stronger the layer is.
  • the brush-off point method of testing gelatin layers involves submerging the sample coated with the gelatin layer in water and raising the temperature at the rate of 5 F. per minute from room temperature to 212 F. In the test each sample is brushed after every 3 degree rise in temperature with a mechanical brushing device. The temperature selected as the end point is that at which the brush removes the gelatin coating from its support. The same measurement was repeated after 10 days aging at room conditions. The results obtained were as follows:
  • EXAMPLE 2 To two types of photographic silver halide gelatin emulsions, various levels of formaldehyde and carboxylic acid salts were added. These emulsions were then coated onto a formaldehyde-free baryta coated paper support. The coatings were air dried overnight. The brush-off points were determined both fresh and after 10 days aging and these points were tabulated as follows:
  • a composition of matter consisting essentially of high jelly strength gelatin, a hardening amount of a gelatin hardener selected from the group consisting of formaldehyde, mucochloric acid, dialdehyde starch, dihydroxydioxane, glutaraldehyde and dialdehyde plant gums and a Water soluble salt of an aliphatic monocarboxylic acid having 1 to carbon atoms.
  • a gelatin hardener selected from the group consisting of formaldehyde, mucochloric acid, dialdehyde starch, dihydroxydioxane, glutaraldehyde and dialdehyde plant gums and a Water soluble salt of an aliphatic monocarboxylic acid having 1 to carbon atoms.
  • composition of matter consisting essentially of high jelly strength gelatin, a hardening amount of formaldehyde and a Water soluble salt of an aliphatic monocarbxoylic acid having 1 to 10 carbon atoms.
  • composition of matter consisting essentially of high jelly strength gelatin, a hardening amount of formaldehyde and an alkali metal salt of an aliphatic monocar' boxylic acid having 1 to 10 carbon atoms.
  • composition of matter consisting essentially of high jelly strength gelatin, a hardening amount of formaldehyde and sodium acetate.
  • a gelatin hardener selected from the group consisting of formaldehyde, mucochloric acid, dialdehyde plant gums and a water soluble salt of an aliphatic monocarboxylic acid having 1 to 10 carbon atoms.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
US452880A 1965-05-03 1965-05-03 Gelatin compositions containing an aldehyde type hardener and an aliphatic monocarboxylic acid Expired - Lifetime US3497358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45288065A 1965-05-03 1965-05-03

Publications (1)

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US3497358A true US3497358A (en) 1970-02-24

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US452880A Expired - Lifetime US3497358A (en) 1965-05-03 1965-05-03 Gelatin compositions containing an aldehyde type hardener and an aliphatic monocarboxylic acid

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US (1) US3497358A (enrdf_load_stackoverflow)
BE (1) BE680469A (enrdf_load_stackoverflow)
DE (1) DE1547683A1 (enrdf_load_stackoverflow)
GB (1) GB1137547A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628961A (en) * 1969-05-14 1971-12-21 Agfa Gevaert Ag Gelatin compositions containing a triazine type hardener and an aliphatic mono- or dicarboxylic acid
US3630741A (en) * 1968-12-31 1971-12-28 Eastman Kodak Co Adhesive gelatin-terpolymer materials having at least one conjugated vinylene dicarbonyl compound added to the emulsion polymerization reaction mixture
JPS49115329A (enrdf_load_stackoverflow) * 1973-03-06 1974-11-05
US4500453A (en) * 1984-06-29 1985-02-19 Dynagel Incorporated Cross-linked protein composition using aluminum salts of acetic acid
US4714758A (en) * 1985-04-10 1987-12-22 Koken Co., Ltd. Surfactant composed of acylated collagen or acylated gelatine and a production process thereof
US5187259A (en) * 1990-11-14 1993-02-16 Eastman Kodak Company Chain extended gelatin

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165421A (en) * 1936-09-25 1939-07-11 Eastman Kodak Co Hardening photographic emulsions
US3140177A (en) * 1960-11-10 1964-07-07 Eastman Kodak Co Processing color photographic materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165421A (en) * 1936-09-25 1939-07-11 Eastman Kodak Co Hardening photographic emulsions
US3140177A (en) * 1960-11-10 1964-07-07 Eastman Kodak Co Processing color photographic materials

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630741A (en) * 1968-12-31 1971-12-28 Eastman Kodak Co Adhesive gelatin-terpolymer materials having at least one conjugated vinylene dicarbonyl compound added to the emulsion polymerization reaction mixture
US3628961A (en) * 1969-05-14 1971-12-21 Agfa Gevaert Ag Gelatin compositions containing a triazine type hardener and an aliphatic mono- or dicarboxylic acid
JPS49115329A (enrdf_load_stackoverflow) * 1973-03-06 1974-11-05
US4500453A (en) * 1984-06-29 1985-02-19 Dynagel Incorporated Cross-linked protein composition using aluminum salts of acetic acid
US4714758A (en) * 1985-04-10 1987-12-22 Koken Co., Ltd. Surfactant composed of acylated collagen or acylated gelatine and a production process thereof
US5187259A (en) * 1990-11-14 1993-02-16 Eastman Kodak Company Chain extended gelatin

Also Published As

Publication number Publication date
GB1137547A (en) 1968-12-27
DE1547683A1 (de) 1969-12-18
BE680469A (enrdf_load_stackoverflow) 1966-10-17

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