Process for crosslinking hydrophilic colloids

Details Process for crosslinking hydrophilic colloids Process for crosslinking hydrophilic colloids

1974-02-27

1976-11-16

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

96111, 526 9, 526 11, C08F11606, C09H 700

Patent

active

039923665

ABSTRACT:
A process for crosslinking hydrophilic colloids which contain amino, imino and/or hydroxyl groups is provided. The crosslinking agents correspond to the formula ##SPC1##
Wherein A is hydrogen, hydroxyl, halogen, acylamino, an immonium-ether radical, the radical --NR.sub.1 R.sub.2 with R.sub.1 and R.sub.2 being hydrogen, alkyl, alkenyl, alkinyl, cycloalkyl, aryl, aralkyl or the nitrogen atom is part of a saturated ring which optionally contains further hetero-atoms, or the radical .sup.+NR.sub.3 R.sub.4 R.sub.5 with R.sub.3, R.sub.4 and R.sub.5 being hydrogen, alkyl, alkenyl, alkinyl, cycloalkyl, aryl, aralkyl or the nitrogen atom is part of a saturated or unsaturated ring which optionally contains further hetero-atoms, B is an ammonium or phosphonium radical and X.sup.- is an anion. The process is useful for crosslinking e.g. gelatine layers in photographic materials.

REFERENCES:
patent: 3826788 (1974-07-01), Froehlich et al.

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