Solid preparation of water-soluble acid dye and polymer particles with quaternary ammonium or phosphonium groups

US4459130A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Gunter Helling · Siegburg, DE
• Hans hlschlager · Bensberg, DE
• Hans Langen · Frechen, DE

Key dates

• Filing date: Nov 2, 1983
• Grant date: Jul 10, 1984
• Expiry date: Nov 2, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/142
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A dye preparation consists of a water-soluble acid dye and a water-insoluble basic carrier. The carrier consists of crosslinked polymer particles of average particle diameter of less than 1 .mu.m and contains at least 2 mVal/g of quaternary ammonium or phosphonium groups. The dye reacts with the carrier in an ion exchange reaction and forms a dye polymer latex which can easily isolated in solid form, stored indefinitely and redispersed in water whenever required. It forms a so-called self-dispersing dye preparation. The dye preparation is useful for making dyed layers such as in photographic recording materials.