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GB889760A - Improvements in the preparation of photographic emulsions - Google Patents

Improvements in the preparation of photographic emulsions

Info

Publication number
GB889760A
GB889760A GB1141158A GB1141158A GB889760A GB 889760 A GB889760 A GB 889760A GB 1141158 A GB1141158 A GB 1141158A GB 1141158 A GB1141158 A GB 1141158A GB 889760 A GB889760 A GB 889760A
Authority
GB
United Kingdom
Prior art keywords
methacrylic acid
polymerized
substituent
carbon atoms
range
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
Application number
GB1141158A
Inventor
Guido Polla-Mattiot
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.)
Ferrania SpA
Original Assignee
Ferrania SpA
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 Ferrania SpA filed Critical Ferrania SpA
Priority to GB1141158A priority Critical patent/GB889760A/en
Publication of GB889760A publication Critical patent/GB889760A/en
Expired 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
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
    • G03C1/053—Polymers obtained by reactions involving only carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

Synthetic amphoteric polymers for the preparation of photographic silver halide emulsions (see Group XX) consist of a methylene chain alternate carbon atoms of which are singly or doubly substituted. One substituent of each of these alternate carbon atoms is an acidic or basic group and the second substituent, if present, is either alkyl or aryl. The polymer is necessarily insoluble in water over a range of pH values and soluble beyond both limits of the range. Preferably, the acidic groups are carboxyl and the basic groups are pyridine or diethylamine ethyl ester. In the examples vinyl pyridine is polymerized, in toluene in the presence of benzoyl peroxide, with methacrylic acid or a mixture of methyl methacrylate and methacrylic acid. In a further example di-ethylamine ethylmethacrylate is polymerized in acid aqueous solution with methacrylic acid in the presence of potassium persulphate. Specifications 648,472, 694,132, 721,067, 762,019 and 807,894 are referred to.
GB1141158A 1958-04-10 1958-04-10 Improvements in the preparation of photographic emulsions Expired GB889760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1141158A GB889760A (en) 1958-04-10 1958-04-10 Improvements in the preparation of photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1141158A GB889760A (en) 1958-04-10 1958-04-10 Improvements in the preparation of photographic emulsions

Publications (1)

Publication Number Publication Date
GB889760A true GB889760A (en) 1962-02-21

Family

ID=9985716

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1141158A Expired GB889760A (en) 1958-04-10 1958-04-10 Improvements in the preparation of photographic emulsions

Country Status (1)

Country Link
GB (1) GB889760A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3360373A (en) * 1962-12-04 1967-12-26 Ciba Ltd Process for the manufacture of silver halide emulsions by the flocculation method
US3746548A (en) * 1971-10-08 1973-07-17 Polaroid Corp Silver halide emulsion with graft copolymer binders
US3852073A (en) * 1970-12-31 1974-12-03 Polaroid Corp Silver halide emulsions comprising polymeric peptizers
US4735887A (en) * 1985-04-22 1988-04-05 E. I. Du Pont De Nemours And Company Wash-off film containing synthetic amphoteric polymers
US4749762A (en) * 1982-05-12 1988-06-07 E. I. Du Pont De Nemours And Company Acrylic amphoteric polymers
US5011898A (en) * 1982-05-12 1991-04-30 E. I. Du Pont De Nemours And Company Acrylic amphoteric polymers
US5187059A (en) * 1982-05-12 1993-02-16 E. I. Du Pont De Nemours And Company Silver halide emulsion containing acrylic amphoteric polymers
US5229250A (en) * 1982-05-12 1993-07-20 E. I. Du Pont De Nemours And Company Element containing acrylic amphoteric polymers
US5977190A (en) * 1998-01-14 1999-11-02 Eastman Kodak Company Process for deionizing and concentrating emulsions

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3360373A (en) * 1962-12-04 1967-12-26 Ciba Ltd Process for the manufacture of silver halide emulsions by the flocculation method
US3852073A (en) * 1970-12-31 1974-12-03 Polaroid Corp Silver halide emulsions comprising polymeric peptizers
US3746548A (en) * 1971-10-08 1973-07-17 Polaroid Corp Silver halide emulsion with graft copolymer binders
US4749762A (en) * 1982-05-12 1988-06-07 E. I. Du Pont De Nemours And Company Acrylic amphoteric polymers
US5011898A (en) * 1982-05-12 1991-04-30 E. I. Du Pont De Nemours And Company Acrylic amphoteric polymers
US5187059A (en) * 1982-05-12 1993-02-16 E. I. Du Pont De Nemours And Company Silver halide emulsion containing acrylic amphoteric polymers
US5229250A (en) * 1982-05-12 1993-07-20 E. I. Du Pont De Nemours And Company Element containing acrylic amphoteric polymers
US4735887A (en) * 1985-04-22 1988-04-05 E. I. Du Pont De Nemours And Company Wash-off film containing synthetic amphoteric polymers
US5977190A (en) * 1998-01-14 1999-11-02 Eastman Kodak Company Process for deionizing and concentrating emulsions

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