Sensitization of light-sensitive silver halide photographic emulsions

Abstract

Abstract LIGHT-SENSITIVE SILVER HALIDE EMULSIONS ARE SENSITIZED BY INCORPORTING INTO THE EMULSION, A SENSITIZING AMOUNT (0.11000 MK./KG.) OF A COMPOUND OF THE FORMULA: X(-A-B-CO-B''-A''-S-R)2 WHEREIN A IS A LOWER ALKYLENE GROUP, OR A POLYALKYLENE ETHER GROUP, HAVING THE FORMULA: -(CH2-CH2-O)P-; -(CH2-CH2-O)P-CH2-CH2-; OR -(CH(-CH3)-CH2-O)P- AND WHICH IS NOT BONDED THROUGH AN OXYGEN ATOM TO B;A'' IS A LOWER ALKYLENE GROUP, OR A POLYALKYLENE ETHER GROUP HAVING THE FORMULA -(CH2-CH2-O)P-CH2-CH2- OR -(CH(-CH3)-CH2-O)P-CH(-CH3)2 PROVIDED THAT A AND A'' ARE NOT BOTH POLYALKYLENE ETHER GROUP AT THE SAME TIEM, AND P IS AN INTEGER OF 2 TO 30; B AND B'' ARE-NH-OR-O-, PROVIDED THAT BOTH ARE NOT -O-AT THE SAME TIME; R IS A LOWER ALKYL GROUP, A PHENYL GROUP, AN ARALKYL GROUP OR -(CH2)Q-COOR'', WHEREIN Q IS AN INTEGER OF 1 TO 3, AND R'' IS A LOWER ALKYL GROUP; AND X IS A DIVALENT GROUP OF THE FORMULA: -S-; -O-; -CH2-; -CH(-CH3)2-; -CH2-CH2-; PHENYLENE; OR -N(-R)- WHEREIN R" IS A LOWERY ALKYL GROUP.

Inventors

• 👤 Shui Sato
• 👤 Rintaro Ushiyama
• 👤 Eiichi Sakamoto
• 👤 Sadatugu Terada
• 👤 Hiroshi Yamada

Bibliographic Details