Process for hardening gelatin

Details Process for hardening gelatin Process for hardening gelatin

1975-06-05

1977-10-04

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

96111, 260 2EN, 526 9, 526 50, 526 52, C09H 500

Patent

active

040523730

ABSTRACT:
A process for hardening, e.g., gelatin, in particular, a gelatin used for photographic light-sensitive materials, which comprises treating gelatin, a non-gelatin hydrophilic high molecular weight material containing primary or secondary amino groups or a composition containing the same with a compound represented by the following general formula (I): ##STR1## WHEREIN R.sub.1 and R.sub.2, which may be the same or different, each represents a monovalent residue which is bonded through a carbon atom or a sulfur atom thereof to the nitrogen atom forming the carboxylic acid ester, and R.sub.1 and R.sub.2 may combine to form a ring structure; R is a divalent or trivalent residue which is bonded through a carbon atom or a nitrogen atom thereof to the carbon atom of the carboxyl group in the carboxylic acid ester, and n is 2 when R is a divalent residue and n is 3 when R is a trivalent residue.

REFERENCES:
patent: 3770451 (1973-11-01), Jenkins et al.

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