EP0235939A2
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EP
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Thermal transfer printing
Assignee: Syngenta Ltd
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Filing: 1987-01-30
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Granted: —
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Expires: 2007-01-30
Abstract
Abstract A thermal transfer printing sheet comprising a substrate having a coating comprising a dye of the formula: A - N = N- E wherein A is a phenyl group substituted by at least one electron-withdrawing group selected from NO₂, CN, CF₃, halogen, -SO₂-C 1-4 -alkyl, -SO₂F, -SO₂CF₃, -SO₂NRR¹, -CONRR¹, -COOR, -CO-CO-R, wherein R and R¹ are independently selected from H and C 1-4 alkyl, provided that where A carries only two halogen atoms these are not in the 2- and 6- positions in relation to the azo link; and E is the radical of an aniline, a tetrahydroquinoline, a lilolidine or a julolidine coupling component, and a thermal transfer printing process for the coloration of a polymeric substrate using the thermal transfer printing sheet.
Inventors
- 👤 Peter Gregory
- 👤 Raymond Leslie White
- 👤 Geoffrey Richard Rothwell
- 👤 Roy Porter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/385; B41M5/388
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
A thermal transfer printing sheet comprising a substrate having a coating comprising a dye of the formula: A - N = N - E wherein A is a phenyl group substituted by at least one electron-withdrawing group selected from NO₂, CN, CF₃, halogen, -SO₂-C 1-4 -alkyl, -SO₂F, -SO₂CF₃, -SO₂NRR¹, -CONRR¹, -COOR, -CO-CO-R, wherein R and R¹ are independently selected from H and C 1-4 alkyl, provided that where A carries only two halogen atoms these are not in the 2- and 6- positions in relation to the azo link; and E is the radical of an aniline, a tetrahydroquinoline, a lilolidine or a julolidine coupling component.
Claim 2
Dependent Claim
106 words
A thermal transfer printing sheet comprising a substrate having a coating comprising a dye of the formula: A - N = N - E wherein A is a phenyl group substituted by at least one electron-withdrawing group selected from NO₂, CN, CF₃, halogen, -SO₂-C 1-4 -alkyl, -SO₂F, -SO₂CF₃, -SO₂NRR¹, -CONRR¹, -COOR, -CO-CO-R, wherein R and R¹ are independently selected from H and C 1-4 alkyl, provided that where A carries only two halogen atoms these are not in the 2- and 6- positions in relation to the azo link; and E is the radical of an aniline, a tetrahydroquinoline, a lilolidine or a julolidine coupling component.
Claim 3
Dependent Claim
21 words
A thermal transfer printing sheet according to Claim 1 wherein the phenyl group A carries at two or three electron-withdrawing groups.
Claim 4
Dependent Claim
33 words
A thermal transfer printing sheet according to Claim 1 or Claim 2 wherein A is of the formula: wherein X¹ is NO₂, CN or -SO₂CH₃; and X² is NO₂, CN, -SO₂CH₃ or H.
Claim 5
Dependent Claim
25 words
A thermal transfer printing sheet according to any one of Claims 1-3 where A is of the formula: wherein X¹ is NO₂, CN or -SO₂CH₃.
Claim 6
Dependent Claim
44 words
A thermal transfer printing sheet according to Claim 1 or Claim 2 wherein A is of the formula: wherein Y¹ & Y² are independently selected from CN, NO₂ and halogen, especially Cl or Br, provided that they are not both NO₂ or both halogen.
Claim 7
Dependent Claim
220 words
A thermal transfer printing sheet according to any one of Claims 1 to 5 wherein E is selected from, (i) an anilino group of the formula: R² is selected from H, C 1-4 -alkyl, C 1-4 -alkoxy, C 1-4 -alkylthio, NH₂-CO-NH-, HCONH-, phenyl-CONH-, C 1-4 -alkyl-CO-NH-, C 1-4 -alkyl-SO₂-NH-, CN, CF₃, and halogen; R³ & R⁴ are independently selected from H; C 1-6 -alkyl and C 4-8 -cycloalkyl, each of which is unsubstituted or substituted by a group independently selected from halogen, CN, phenyl, mono- or bicyclic heteroaryl, -OCO-C 1-4 -alkyl, -COO-C 1-4 -alkyl, C 2-4 -alkenyl, and C 1-4 -alkoxy; or R³ & R⁴ together with the nitrogen atom to which they are attached form a heterocyclic ring, such as morpholine, piperazine or thiomorpholine; and R⁵ is selected from H, C 1-4 -alkyl and C 1-4 -alkoxy; (ii) a tetrahydroquinolinyl group of the formula: wherein R³ is selected from H; C 1-6 -alkyl and C 4-8 -cycloalkyl, each of which is independently unsubstituted or substituted by a group selected from halogen, CN, phenyl, mono- or bicyclic heteroaryl, -OCO-C 1-4 -alkyl, -COO-C 1-4 -alkyl, C 2-4 -alkenyl, and C 1-4 -alkoxy; and R⁶ to R⁹ are independently selected from H and C 1-4 -alkyl; and (iii) lilolidinyl or julolidinyl of the formula: wherein n = 2 (lilolidine) or 3 (julolidine).
Claim 8
Dependent Claim
49 words
A thermal transfer printing sheet according to Claim 1 wherein the dye is of the formula: wherein X¹ is NO₂ or CN; R¹² is selected from H, CH₃ and -NHCOCH₃; and R¹⁴ & R¹⁵ are each independently selected from C 2-4 -alkyl, C 1-4 -alkylene-OCO-C 1-4 -alkyl and C₂H₄CN.
Claim 9
Dependent Claim
66 words
A thermal transfer printing sheet according to Claim 1 wherein the dye is of the formula: wherein Y¹ is NO₂ or CN; Y² is CN, Cl or Br; R¹⁴ & R¹⁵ are each independently selected from C 2-4 -alkyl and C 1-4 -alkylene-OCO-C 1-4 -alkyl; R⁵ is selected from H, C 1-4 -alkyl and C 1-4 -alkoxy; and R¹² is selected from H, CH₃ or -NHCOCH₃.
Claim 10
Dependent Claim
55 words
A thermal transfer printing sheet according to claim 1 wherein the coating comprises a dye of the formula: wherein Z is H or -OCOCH₃; in admixture with a dye of the formula: wherein R is H or -OCH₃; Q is selected from H, -OCOCH₃ and -COOC₂H₄OCH₃; and Q¹ is selected from H, -C₂H₅ and -C₂H₄OCOCH₃.
Claim 11
Dependent Claim
111 words
A thermal transfer printing sheet according to claim 1 wherein the coating comprises a dye of the formula: wherein X¹ is NO₂ or CN; R¹² is selected from H, CH₃ and -NHCOCH₃; and R¹⁴ & R¹⁵ are each independently selected from C 2-4 -alkyl, C 1-4 -alkylene-OCO-C 1-4 -alkyl and C₂H₄CN; in admixture with a dye of the formula: A¹ - N = N - E wherein A¹ is selected from 3-methyl-4-cyanoisothiazol-5-yl, 4-cyanoisothiazol-5-yl and 1-cyanomethyl-3,4-dicyanopyrazol-5-yl, and E is of the formula: wherein R² is selected from H, chlorine and C 1-4 -alkyl; R³ & R⁴ are each independently C 2-4 alkylene-OCO-C 1-4 -alkyl or C 2-4 -alkyl; and R⁵ is H.
Claim 12
Dependent Claim
59 words
A thermal transfer printing process which comprises contacting a transfer sheet coated with a dye of Formula I with a receiver sheet, so that the dye is adjacent to the receiver sheet, and selectively heating an area of the transfer sheet whereby dye in the heated area of the transfer sheet may be selectively transferred to the receiver sheet.
Claim 13
Dependent Claim
59 words
A thermal transfer printing process which comprises contacting a transfer sheet coated with a dye of Formula I with a receiver sheet, so that the dye is adjacent to the receiver sheet, and selectively heating an area of the transfer sheet whereby dye in the heated area of the transfer sheet may be selectively transferred to the receiver sheet.
References Cited (Backward Citations)
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