Blocked development restrainers

Details Blocked development restrainers Blocked development restrainers

1981-06-12

1982-09-21

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430240, 430445, 430505, 430542, 430544, 430559, 430564, 430960, G03C 140, G03C 554, G03C 110, G03C 300

Patent

active

043507549

ABSTRACT:
There are described novel compounds which are represented by the formula ##STR1## wherein R is ##STR2## A is sulfur or selenium; X represents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R.sub.1 is H or lower alkyl; R.sub.2 is H or a hydrolyzable group; and R.sub.3 is H, alkyl or a hydrolyzable group. The compounds are useful in photographic applications and provide controlled release of a photographically useful material during processing of photographic elements with an aqueous alkaline processing composition.

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Guglielmi et al., Chem. Abs., vol. 71, 1969, 48098f.
Athen et al., Chem. Abs., vol. 71, 1969, 59266k.
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