Type of polymer latex and its use as plasticizer in a photographic material

US5478710A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Michael Muller · Zwingenberg, DE
• Daniel M. Timmerman · Mortsel, BE
• Guido Desie · Mortsel, BE
• Stefaan Lingier · Assenede, BE
• Gunter Stackmann · Leverkusen, DE

Key dates

• Filing date: Aug 12, 1994
• Grant date: Dec 26, 1995
• Expiry date: Aug 12, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/053
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

New types of polymer latices and their use in photographic materials are disclosed. They are obtained by subjecting to radical emulsion polymerisation one or more radical-polymerisable monomers, whose emulsifier-free homopolymers or copolymers possess a glass transition temperature below 65.degree. C., preferably below 30.degree. C., in the presence of a water-soluble polymer of a particular chemical formula. These new types of latices are preferably used in graphic arts contact materials, e.g. daylight materials. They can be used in relative high amounts thus improving dimensional stability without deteriorating the scratch resistance too strongly. A preferred radical-polymerisable monomer mixture comprises n.-butyl acrylate, methyl methacrylate and acrylic acid.