# US 5,328,887 A · Thermally transferable fluorescent compounds

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- Number: US 5,328,887 A
- Document ID: US5328887A
- Status: Granted
- Kind: A
- Application number: 07/935,163
- Filed: 1992-08-26
- Granted: 1994-07-12
- Earliest claimed: 1991-09-10
- Assignees: Agfa-Gevaert
- Inventors: Wilhelmus Janssens; Luc J. Vanmaele
- Web page: https://patentgrep.com/patent/US5328887A

## CPC

- B41M 5/385: characterised by the transferable dyes or pigments {(infrared absorbing dyes B41M5/465)}
- B41M 5/3854: {Dyes containing one or more acyclic carbon-to-carbon double bonds, e.g., di- or tri-cyanovinyl, methine}
- B41M 5/3856: {Dyes characterised by an acyclic -X=C group, where X can represent both nitrogen and a substituted carbon atom}
- B41M 5/39: Dyes containing one or more carbon-to-nitrogen double bonds, e.g. azomethine
- Y10S 428/913: Material designed to be responsive to temperature, light, moisture
- Y10S 428/914: Transfer or decalcomania
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A donor element for use in a thermal transfer process comprising a support having on one side thereof a thermally transferable fluorescent heterocyclic compound dispersed in a polymeric binder, characterized in that said fluorescent compound corresponds to one of the following general formulae (A) and (B): ##STR1## wherein: R.sup.1 represents a hydrocarbon group or a substituted hydrocarbon group; R.sup.2 represents hydrogen, a hydrocarbon group, a substituted hydrocarbon group, a carboxylic acid group, an ester group, a nitro group, a carbamoyl group, a substituted carbamoyl group, an amino group or a substituted amino group; R.sup.3 represents hydrogen, a hydrocarbon group or a substituted hydrocarbon group, a carboxylic acid group, an ester group, a carbamoyl group or a substituted carbamoyl group; R.sup.4 represents hydrogen or a hydrocarbon group or a substituted hydrocarbon group; X represents an electronegative substituent with respect to the carbon atom to which it is attached; and Z represents the atoms necessary to close a quinoline nucleus or such a nucleus in substituted form.

## Claims

### Claim 1

A donor element for use in a thermal transfer process comprising a support having a thickness of from about 2 to 30 .mu.m and having on one side thereof a thermally transferable fluorescent heterocyclic compound dispersed in a polymeric binder, said fluorescent compound corresponding to one of the following general formulae (A) and (B): ##STR5## wherein: R.sup.1 represents a hydrocarbon group or a substituted hydrocarbon group;
R.sup.2 represents hydrogen, a hydrocarbon group, a substituted hydrocarbon group, a carboxylic acid group, an ester group, a nitro group, a carbamoyl group, a substituted carbamoyl group, an amino group or a substituted amino group;
R.sup.3 represents hydrogen, a hydrocarbon group or a substituted hydrocarbon group, a carboxylic acid group, an ester group, a carbamoyl group or a substituted carbamoyl group;
R.sup.4 represents hydrogen or a hydrocarbon group or a substituted hydrocarbon group;
X represents an electronegative substituent with respect to the carbon atom to which it is attached; and
Z represents the atoms necessary to close a quinoline nucleus or such a nucleus in substituted form.

### Claim 2 (depends on 1)

A donor element according to claim 1, wherein X represents oxygen, sulphur, an imino group or an imino group substituted with a carbocyclic or heterocyclic group of aromatic character, an oxime group, an oxime group substituted with an aliphatic group, a hydrazone group, a substituted hydrazone group or a group introduced by means of an active methylene compound and wherein the carbon atom of the active methylene compound is double bonded to the carbon atom linked to X.

### Claim 3 (depends on 1)

A donor element according to claim 1, wherein X represents the group CQQ' wherein each of Q and Q' represents an electronegative substituent.

### Claim 4 (depends on 3)

A donor element according to claim 3, wherein the electronegative substituent is a member selected from the group consisting of a cyano group, an aryl group, an acyl group, a carboxylic ester group, an amide group or said groups carrying substituents capable of maintaining or enhancing the electronegativity of the whole Q or Q' substituent.

### Claim 5 (depends on 1)

A donor element according to claim 1 wherein said fluorescent compound corresponds to one of the following general formulae (C) and (D) ##STR6## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, Z and X have the meanings given to them in claim 1.

### Claim 6 (depends on 5)

A donor element according to claim 5, wherein X represents oxygen, R.sup.1 represents an alkyl group, R.sup.2 represents an aryl group, R.sup.3 represents hydrogen, R.sup.4 represents an alkyl group or a hydrogen atom, and Z represents the necessary atoms to close a quinoline nucleus substituted by an amino group or a dialkylamino group.

### Claim 7 (depends on 1)

A donor element according to claim 1, wherein said donor element comprises sequential repeating areas of magenta, yellow and cyan dye, and said fluorescent compound.

### Claim 8 (depends on 1)

A donor element according to claim 1, wherein the other side of the support is provided with a slipping layer comprising a lubricant.

### Claim 9

A thermal transfer assemblage comprising:
(a) a donor element comprising a support having on one side thereof a thermally transferable heterocyclic compound dispersed in a polymeric binder, and
(b) a receiving element comprising a support having thereon an image-receiving layer, said receiving element being in a superposed relationship with said donor element so that said one side of the donor element is in contact with said image-receiving layer,
said donor element comprising a support having on one side thereof a thermally transferable fluorescent heterocyclic compound dispersed in a polymeric binder, said fluorescent compound corresponding to one of the following general formulae (A) and (B): ##STR7## wherein: R.sup.1 represents a hydrocarbon group or a substituted hydrocarbon group;
R.sup.2 represents hydrogen, a hydrocarbon group, a substituted hydrocarbon group, a carboxylic acid group, an ester group, a nitro group, a carbamoyl group, a substituted carbamoyl group, an amino group or a substituted amino group;
R.sup.3 represents hydrogen, a hydrocarbon group or a substituted hydrocarbon group, a carboxylic acid group, an ester group, a carbamoyl group or a substituted carbamoyl group;
R.sup.4 represents hydrogen or a hydrocarbon group or a substituted hydrocarbon group;
X represents an electronegative substituent with respect to the carbon atom to which it is attached; and
Z represents the atoms necessary to close a quinoline nucleus or such a nucleus in substituted form.

### Claim 10

A process of forming a thermal transfer image comprising image-wise heating a donor element, and transferring an image to a receiving element comprising a support and an image-receiving layer to form said thermal transfer image, wherein said donor element comprises a support having on one side thereof a thermally transferable fluorescent heterocyclic compound dispersed in a polymeric binder, said fluorescent compound corresponding to one of the following general formulae (A) and (B): ##STR8## wherein: R.sup.1 represents a hydrocarbon group or a substituted hydrocarbon group;
R.sup.2 represents hydrogen, a hydrocarbon group, a substituted hydrocarbon group, a carboxylic acid group, an ester group, a nitro group, a carbamoyl group, a substituted carbamoyl group, an amino group or a substituted amino group;
R.sup.3 represents hydrogen, a hydrocarbon group or a substituted hydrocarbon group, a carboxylic acid group, an ester group, a carbamoyl group or a substituted carbamoyl group;
R.sup.4 represents hydrogen or a hydrocarbon group or a substituted hydrocarbon group;
X represents an electronegative substituent with respect to the carbon atom to which it is attached; and
Z represents the atoms necessary to close a quinoline nucleus or such a nucleus in substituted form.