Method of hardening gelatin and photographic materials produced

Details Method of hardening gelatin and photographic materials produced Method of hardening gelatin and photographic materials produced

1981-11-10

1984-04-24

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

252316, 106125, 430621, 430622, 430623, 430626, 430640, G03C 130, C08L 8900, B01J 1302

Patent

active

044449267

ABSTRACT:
A method of hardening gelatin is described which uses (1) a polymer containing at least 0.01 mol % of a repeating unit represented by formula (I) ##STR1## wherein R represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, or a halogen atom, M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, or an organic base, X represents an alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, an alkylamino group having from 1 to 6 carbon atoms, or a halogen atom, m represents 0, 1 or 2, and n represents 1 or 2, (2) a polyvalent alcohol having at least two hydroxy groups, and (3) a hardener having an active vinyl group.
The method has advantages in that the rate of hardening the gelatin is fast, the so-called post hardening property is small, and the gelatin composition is hardely influenced by the conditions of temperature and humidity during storage.

REFERENCES:
patent: 3017280 (1962-01-01), Yudelson
patent: 3118766 (1964-01-01), Roth
patent: 3811897 (1974-05-01), Babbit et al.
patent: 3926869 (1975-12-01), Horie et al.
patent: 4294921 (1981-10-01), Yamaguchi et al.
Research Disclosure, vol. 176, pp. 22-28 (1978).

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