Bis ureido compositions

Radiation imagery chemistry: process – composition – or product th – Silver halide colloid tanning process – composition – or product

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430598, 430599, 564 59, G03C 106

Patent

active

053914597

ABSTRACT:
Novel compounds have been discovered that are particularly effective as nucleation accelerators or boosters when employed with hydrazide nucleators in the formulation of silver halide emulsions for lithographic film. The novel compounds contain bis ureido groups joined by an alkyleneoxy moiety or recurring alkyleneoxy moieties. The 2-nitrogen of each ureido group can carry groups comprising hydrogen, aryl, alkyl or dialkylaminoalkyl, alike or different.

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