Peptizers for photographic emulsions
Abstract
Abstract A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINS A PEPTIZER COMPRISING A POLYMER CONSISTING ESSENTIALLY OF: (A) ABOUT 3 TO ABOUT 35 MOLE PERCENT OF UNITS OF THE STRUCTURE -CH2-C(-R1)(-(Q)X-N(-R3)-R4)- WHEREIN R1 IS HYDROGEN OR A METHYL RADICAL, Q IS -CO-Z-R2- -CH2-CH(-COOH (C) ABOUT 5 TO ABOUT 65 MOLE PERCENT OF UNITS OF THE STRUCTURE -CH2-C(-CH3)(-COOH)- AND WHEREIN Z IS OXYGEN OR =NH AND R2 IS AN ALKYLENE RADICAL OF FROM 1 TO 6 CARBON ATOMS, X IS ZERO OR ONE, AND R3 AND R4 ARE EITHER (1) TAKEN TOGETHER AND REPRESENTS THE ATOMS NECESSARY TO COMPLETE A 5 OR 6 MEMBERED HETEROCYCLIC RING, OR (2) ARE INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF FROM 1 TO 8 CARBON ATOMS, BUT ONLY WHEN X IS EQUAL TO ONE; (B) ABOUT 30 TO ABOUT 92 MOLE PERCENT OF UNITS OF THE STRUCTURE
Inventors
- 👤 K Hollister
- 👤 E Perry
Bibliographic Details
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