Polymeric surfactant

US4908155A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Luc E. Leemans · Diepenbeek, BE
• Herman Uytterhoeven · Bonheiden, BE
• Philippe Teyssie · Flémalle, BE
• Roger Fayt · Neupré, BE
• Nikolaas C. de Jaeger · Evergem, BE

Key dates

• Filing date: Nov 13, 1987
• Grant date: Mar 13, 1990
• Expiry date: Nov 13, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A surface-active block copolymer which comprises chemically linked polymeric blocks (A) and (B), block (A) of said copolymer consisting of at least one homo- or copolymerized non-polar alpha,beta-ethylenically unsaturated monomer and block (B) of said copolymer is derived by polymerizing an alpha-beta ethylenically unsaturated monomer containing an epoxy group and transforming the epoxy group into an hydroxy-substituted ionic group, preferably an anionic group. These block copolymers are used as dispersing agents in aqueous dispersions, including polymeric latex dispersions, and as plasticizing agent in hydrophilic colloid layers, including colloid layers containing a dispersed light-sensitive silver halide emulsion or other auxiliary substances for photographic materials.