Photographic emulsions containing polymeric peptizer with quaternary ammonium groups

Abstract

Abstract A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINS A PEPTIZER COMPRISING A POLYMER HAVING BOTH QUATERNARY AMMONIUM FUNCTIONALITY AND CARBOXYL FUNCTIONALITY, SAID POLYMER CONSISTING ESSENTIALLY OF: (A) AT LEAST ONE POLYMERIZED ETHYLENICALLY UNSATURATED COMPOUND HAVING AT LEAST ONE QUATERNARY AMMONIUM MOIETY, SAID POLYMERIZED COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF POLYMERIZED VINYL IMIDAZOLIUM COMPOUNDS, POLYMERIZED VINYL PYRIDINIUM COMPOUNDS AND PPOLYMERIZED VINYL COMPOUNDS WHICH IN THE POLYMERIC CHAIN HAVE THE STRUCTURE: -CH2-C(-)(-R1)-CO-Z-R2-N(+)(-R3)(-R4)-R5 WHEREIN Z IS OXYGEN OR = NH, R1 IS HYDROGEN OR METHYL, R2 IS A DIVALENT ALKYLENE RADICAL OF 1 TO 6 CARBON ATOMS, R3, R4 AND R5 ARE EITHER (1) INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF FROM 1 TO 8 CARBON ATOMS, OR (2) R3 AND R4 TAKEN TOGETHER REPRESENT THE ATOMS NECESSARY TO COMPLETE A 5 OR 6 MEMBERED HETEROCYCLIC RING AND R5 IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF FROM 1 TO 8 CARBON ATOMS, OR (3) R3, R4 AND R5 TAKEN TOGETHER REPRESENT THE ATOMS NECESSARY TO COMPLETE A 5- OR 6-MEMBERED HETEROCYCLIC RING WHEREIN THE NITROGEN ATOM WHICH IS ATTACHED TO R2 HAS ONE DOUBLE BOND ATTACHED THERETO; AND (B) AT LEAST ONE POLYMERIZED ETHYLENICALLY UNSATURATED COMPOUND HAVING AT LEAST ONE CARBOXYL RADICAL; SUCH THAT, THE MOLAR RATIO IN THE POLYMERIC COMPOUND OF QUATERNARY AMMONIUM FUNCTONALITY TO CARBOXYL FUNCTIONALITY IS IN THE RANGE OF ABOUT 1:1-15.

Inventors

• 👤 K Hollister
• 👤 E Perry

Bibliographic Details