Stabilized vinyl sulfone hardening compositions useful in photographic manufacturing

US5514535A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Lewis R. Hamilton · Rochester, US
• Peter Marr · Bochum, DE
• Philip Raymond Martell · Rochester, US
• Kristine F. Ohman · Rochester, US

Key dates

• Filing date: May 10, 1995
• Grant date: May 7, 1996
• Expiry date: May 10, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/30
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Hydrophilic colloids, such as gelatin, which are employed in the manufacture of photographic elements are commonly treated with a hardening composition, among the most useful of which are hardening compositions containing vinyl sulfone hardening agents such as bis(vinylsulfonyl)methane. In accordance with this invention, a sulfate, such as sodium sulfate, is utilized as both an effective conductivity marker and an effective inhibitor of homopolymerization in such hardening compositions.