Photographic silver halide recording material with graft copolymer particles in outer layer

US4524131A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Wolfgang Himmelmann · Leverkusen, DE
• Gunter Sackmann · Leverkusen, DE
• Rudolf Meyer · Leverkusen, DE

Key dates

• Filing date: Aug 22, 1984
• Grant date: Jun 18, 1985
• Expiry date: Aug 22, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/151
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The recording material contains in an outer layer pre-formed polymer particles, the particle size of which is less than 10 .mu.m and which have a particle size distribution of .+-.1 .mu.m, which are soluble in alkaline medium and are dispersed in a hydrophilic colloid, and which are a graft copolymer of methacrylic acid and methyl-methacrylate on the graft base of an .alpha.-olefin- or styrene-maleic acid semiamide-copolymer.