Chromogenic compositions containing stabilized phenolic coupler

Details Chromogenic compositions containing stabilized phenolic coupler Chromogenic compositions containing stabilized phenolic coupler

1982-11-18

1984-03-27

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

430181, 430171, 430150, 430151, 430149, 430338, 430345, 430336, 430341, 430170, 428913, 106 21, 346205, 346225, G03C 152

Patent

active

044395124

ABSTRACT:
Phenylurethane compounds formed by the reaction between a phenolic coupler compound and an organic isocyanate compound are utilized to form phenolic coupler compounds in situ in order to react with chromogenic compounds present in the sensitive layer of recording or reproducing materials.
The phenolic coupler compounds can also be stabilized by blocking the phenolic hydroxyl with carbonate, an alkyl ether, organosilylated ether or organophosphoric acid ester, some of which are novel compounds. These stabilized derivatives of the stabilized phenolic coupler compound will decompose by application to sufficient thermal energy or suitable liquid or gaseous fluid to form the phenolic coupler compound in situ. The phenolic coupler compound is formed in situ by applying thermal energy to the sensitive layer or by applying to the sensitive layer a liquid or gaseous fluid which is able to decompose the stabilized phenolic coupler compound and release the phenolic coupler compound.
Preferred chromogenic compounds include spiropyrans, triphenylmethane derivatives, ferric salts, non-photosensitive silver salts and diazonium compounds. Use in a diazo process is particularly beneficial. Sensitive recording materials of greatly improved shelf-life are provided. The compositions and recording or reproducing materials have applicability to photosensitive and thermosensitive systems and in dry, semi-dry and wet development processes.

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patent: 4097288 (1978-06-01), Lawton
patent: 4289839 (1981-09-01), Di Pippo
Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 12, John Wiley & Sons, Inc., 1967, p. 48.

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