Silver halide emulsions containing alkyl selenols and thiols as antifoggants

Abstract

Abstract PHOTOGRAPHIC SILVER HALIDE EMULSIONS AND ELEMENTS COMPRISING SAID EMULSIONS ARE STABILIZED AGAINST FOG BY ORGANIC SELENIUM DERIVATIVES AND THEIR SULFUR-CONTAINING ANALOGS. NEW ALKYL SELENOLS USEFUL IN FOG STABILIZING CONCENTRATIONS ARE LIKEWISE DISCLOSED. THESE FOG STABILIZING ORGANIC COMPOUNDS HAVE THE STRUCTURAL FORMULA: A-X-(C(-R1)(-R2))M-(C(-R3)(-R4))N-R5 IN WHICH A IS A CATION, X IS SULFUR OR SELENIUM, R1 TO R5 ARE EACH HYDROGEN OR ORGANIC RESIDUES PROVIDED THAT AT LEAST ONE OF SAID R1 TO R5 IS A SULFONIC ACID GROUP OR SALT THEREOF AND M AND N ARE EACH ABOUT 0 TO ABOUT 4 SO THAT THE SUM OF M AND N EQUALS A POSITIVE INTEGER UP TO ABOUT 8, Y-C(-A)(-X-A)-C(-Z)(-B)-N(-R7)-CO-R6, OR R6-CH=C<(-X- C(-A)(-Y)-C(-Z)(-B)-N(-R7)-) IN WHICH A IS A CATION, X IS SULFUR OR SELENIUM, R7 IS AN ORGANIC RESIDUE, R6 IS HYDROGEN OR AN ORGANIC RESIDUE, A AND B ARE EACH HYDROGEN, ORGANIC RESIDUE OR THE ELECTRONS REQUIRED TO FORM DOUBLE BONDS BETWEEN THE CARBON ATOMS, Y AND Z ARE EACH HYDROGEN OR AN ORGANIC RESIDUE OR TOGETHER COMPRISE ATOMS NEEDED TO COMPLETE A CYCLIC NUCLEUS.

Inventors

• 👤 A Herz
• 👤 Wescott E Russell

Bibliographic Details