Abstract:
Highly concentrated stable solutions of color-forming agents of the general formula ##STR1## wherein x denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino andR denotes alkyl, alkenyl or aralkyl,further isocyclic or heterocyclic rings can be fused onto the rings A, B, C and D and the cyclic and acyclic radicals and the rings A, B, C and D can carry further non-ionic substituents which are customary in dyestuff chemistry, or mixtures thereof, in water-insoluble organic solvents from the group comprising optionally chlorinated hydrocarbons, vegetable oils and phthalic acid esters are used for the preparation of pressure-sensitive recording materials.
Abstract:
Color photographic images are produced by decomposing hydrogen peroxide on nuclei present in imagewise distribution and bleaching out a dye by the hydrogen peroxide on those parts of the image where no such nuclei are present.
Abstract:
Printing inks for the preparation of temporary supports for transfer printing on acid-modified textile fibre materials, containing(a) as a dyestuff intermediate a dyestuff base which can be sublimed at 160.degree.-240.degree. C, of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl,R.sub.3 is hydrogen, alkyl, cycloalkyl or aralkyl,R.sub.4 is hydrogen or a non-ionic substituent,R.sub.5 is hydrogen, an alkyl, alkoxycarbonyl or nitrile group,R.sub.6 and R.sub.7 are hydrogen or non-ionic substituents,B represents --CH--, --N.dbd. or ##STR2## (B) A ORGANIC SOLVENT AND (C) A NEUTRAL RESIN.
Abstract:
Compounds of the formula ##STR1## in which R.sup.1 /R.sup.2 are alkyl, cycloalkyl, aralkyl or alkylene,R.sup.3 is alkyl, cycloalkyl or aralkyl,Z is alkylene,X is O orare highly suitable as color formers in recording materials based on acid developers. They give yellow or orange hues which have excellent sublimation and light fastness.
Abstract:
Color-forming agents of the present formula ##STR1## wherein X denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino,R denotes alkyl, alkenyl or aralkyl,R.sub.1 denotes hydrogen, halogen or alkyl,R.sub.2 denotes alkoxy, aralkoxy, aryloxy or a radical of the formula ##STR2## Y.sub.1 and Y.sub.2 independently of one another denote alkyl, aryl, cycloalkyl or aralkyl or R.sub.2, with A in the o-position, forms a heterocyclic ring,a benzene ring can be fused onto the ring A, in the o-/m-position relative to R.sub.2, and the ring A and its fused-on rings and the cyclic and acyclic radicals can carry further non-ionic substitutents customary in dyestuffs chemistry,are used in thermoreactive papers and pressure-sensitive recording materials and for the preparation of highly concentrated solutions in organic solvents.
Abstract:
Compounds of the general formula ##STR1## wherein R represents hydrogen or alkyl andA represents a radical of the formula ##STR2## wherein the rings D can carry up to 4 alkyl radicals,R.sup.1 and R.sup.2 independently of one another represent alkyl, alkenyl, cycloalkyl, aryl or aralkyl andR.sup.3 represents hydrogen, alkyl or aryl,and the said cyclic and acyclic radicals and the rings B and C may carry nonionic substituents, are used as color-forming agents.
Abstract:
Process for the preparation of basic oxazine dyestuffs by nitrosation of aminophenol ethers ##STR1## wherein R.sub.1 denotes hydrogen or optionally substituted alkyl or alkenyl,R.sub.2 denotes optionally substituted alkyl, alkenyl, aryl or aralkyl,R.sub.3 denotes hydrogen, alkyl or alkoxy,R.sub.9 denotes hydrogen or alkyl andn denotes 1, 2 or 2,And condensation with phenols ##STR2## wherein R.sub.4 denotes hydrogen or the group ##STR3## R.sub.5 denotes hydrogen, alkyl or alkoxy, R.sub.6 denotes hydrogen or, conjointly with R.sub.5, denotes an aromatic radical,R.sub.7 denotes hydrogen or optionally substituted alkyl or alkenyl, andR.sub.8 denotes hydrogen or optionally substituted alkyl, alkenyl, aryl or aralkyl.
Abstract:
Printing inks for the production of auxiliary carriers for transfer printing on acid-modified textile fiber materials, characterized in that they contain at leastA. as a dyestuff intermediate, a carbinol base of cationic dyestuffs, which can be sublimed at 160-240.degree. C, of the formula ##EQU1## wherein A, B and D represent an aryl or heteryl radical,B can also denote hydrogen or can, conjointly with A, form the remaining members of a heterocyclic ring system,E represents a direct bond or a >N-alkyl group,L represents a methine group which is optionally substituted by alkyl, nitrile or alkoxycarbonyl or represents a N atom andn denotes the numbers 0 or 1,B. a practically anhydrous neutral organic solvent andC. a neutral resin which is soluble in this solvent.
Abstract:
Thermoreactive recording material contains, as developer, a mixture of an acidic-modified polymer of (meth)acrylonitrile and/or methacrylonitrile and a diphenol of the formula ##STR1## in which Y is, for example, a single bond, an alkylene or alkylidene radical, gives, on thermal printing, a dye which has a reduced tendency to sublime.