Silver halide photographic light-sensitive systems
申请人:Minnesota Mining and Manufacturing Company
公开号:US04925832A1
公开(公告)日:1990-05-15
A silver halide photographic light sensitive emulsion containing a hydrazine of the general formula R.sup.3 -NR.sup.4 -NR.sup.5 -G-X (I) in which R.sup.3 represents an aryl group, one of R.sup.4 and R.sup.5 is a hydrogen and the other is selected from hydrogen, aryl sulphonyl and trifluoroacetyl, G represents carbonyl, sulphonyl, sulphoxy, phosphoryl or an N-substituted or unsubstituted imino group and X is a moiety such that at a pH in the range of 9.5 to 12.5 in the presence of an oxidized hydroquinone a cyclization reaction takes place cleaving the moiety -G-X from the remainder of the molecule and forming a cyclic structure comprising atoms of the moiety -G-X.
Silver halide photographic light-sensitive systems comprising a
申请人:Minnesota Mining and Manufacturing Company
公开号:US04798780A1
公开(公告)日:1989-01-17
A silver halide photographic light sensitive emulsion containing a hydrazine of the general formula R.sup.3 -NR.sup.4 -NR.sup.5 -G-X (I) in which: R.sup.3 represents an aryl group, one of R.sup.4 and R.sup.5 is a hydrogen and the other is selected from hydrogen, aryl sulphonyl and trifluoroacetyl, G represents carbonyl, sulphonyl, sulphoxy, phosphoryl or an N-substituted or unsubstituted imino group and X is a moiety such that at a pH in the range of 9.5 to 12.5 in the presence of an oxidized hydroquinone a cyclization reaction takes place cleaving the moiety -G-X from the remainder of the molecule and forming a cyclic structure comprising atoms of the moiety -G-X.
Hydrazide compounds useful as co-developers for black-and-white thermographic elements
申请人:Imation Corp.
公开号:EP0940714A2
公开(公告)日:1999-09-08
Trityl hydrazides and formyl-phenyl hydrazines are useful as co-developers with hindered phenols in phothothermographic and thermographic elements. These co-developers have the formula:
R1-(C=O)n-NHNH-R2
R1 represents hydrogen and R2 represents an aryl or substituted aryl group; or,
R1 represents hydrogen, alkyl and alkenyl groups of up to 20 carbon atoms; alkoxy, thioalkoxy, or amido groups of up to 20 carbon atoms; aryl, alkaryl, or aralkyl groups of up to 20 carbon atoms; aryloxy, thioaryloxy, or anilino groups of up to 20 carbon atoms; aliphatic or aromatic heterocyclic ring groups containing up to 6 ring atoms; carbocyclic ring groups comprising up to 6 ring carbon atoms; or fused ring or bridging groups comprising up to 14 ring atoms; and R2 represents a trityl group.
The photothermographic and thermographic elements in the present invention may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation sensitive imageable medium.