申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0399673A1
公开(公告)日:1990-11-28
A thermal transfer printing sheet suitable for the printing of black images in a dye diffusion thermal transfer printing process. The sheet comprises a substrate having a coating comprising a black dye mixture comprising from 5 to 60% of a dye of Formula 1, from 5 to 60% of Formula 2, from 5 to 60% of a dye of Formula 3 and/or from 1 to 60% of a dye of Formula 4.
Dyes of Formula (1) are represented as:
wherein:
X is -H; nitro or -COOR¹ in which R¹ is an optionally substituted hydrocarbyl radical;
Y is an optionally substituted C₁₋₁₀-alkyl; optionally substituted C₁₋₁₀-alkoxy or halogen;
Z is an alkyl radical, and
R is an alkyl radical which may be interrupted by one or two -O- or -COO- links.
Dyes of Formula 2 are represented as:
A-N=N-E
Formula 2
wherein:
A is the residue of a dizotisable heteroaromatic amine, A-NH₂, in which A is selected from imidazolyl, pyrazolyl, thiazolyl, benzothiazolyl, isothiazolyl, benzoisothiazolyl, pyridoisothiazolyl; thienyl and triazolyl; and
E is the residue of an aromatic coupling component, E-B, wherein B is a group displaceable by a diazotised aromatic amine and E is optionally substituted aminophenyl, tetrahydroquinolinyl, julolidyl or aminoquinolinyl.
Dyes of Formula 3 are represented as:
C-N=N-D-N=N-G
Formula 3
wherein:
C is the residue of a diazotisable phenylamine or naphthylamine, C-NH₂, carrying not more than one unsaturated electron-withdrawing group;
D is an optionally substituted thiophen-2,5-ylene or thiazol-2,5-ylene group; and
G is the residue of an aromatic coupling component G-J wherein J is a group displaceable by a diazotised aromatic amine.
Dyes of Formula 4 are represented as:
wherein:
R¹² is C₁₋₆-alkyl, C₄₋₈-cycloalkyl or C₂₋₆-alkenyl;
R¹³ is C₁₋₆-alkyl or C₂₋₆-alkenyl; and
R¹⁴ is H or C₁₋₆-alkyl or C₂₋₆ -alkenyl.
一种适用于在染料扩散热转移印花工艺中印制黑色图像的热转移印花片材。该印花布由基材组成,基材上有一层黑色染料混合物涂层,黑色染料混合物包括 5-60%的式 1 染料、5-60%的式 2 染料、5-60%的式 3 染料和/或 1-60%的式 4 染料。
式(1)的染料表示为
其中
X 是-H;硝基或-COOR¹,其中 R¹ 是任选取代的烃基;
Y 是任选取代的 C₁₋₁₀-烷基;任选取代的 C₁₋₁₀-烷氧基或卤素;
Z 是烷基,且
R 是烷基,可被一个或两个 -O- 或 -COO- 连接打断。
式 2 的染料表示为
A-N=N-E
式 2
其中
A 是可重氮化的杂芳香族胺 A-NH₂ 的残基,其中 A 选自咪唑基、吡唑基、噻唑基、苯并噻唑基、异噻唑基、苯并异噻唑基、吡啶异噻唑基;噻吩基和三唑基;以及
E 是芳香偶联组分 E-B 的残基,其中 B 是可被重氮化芳香胺置换的基团,E 是任选取代的氨基苯基、四氢喹啉基、巨烷基或氨基喹啉基。
式 3 的染料表示为
C-N=N-D-N=N-G
式 3
其中
C 是可重氮的苯胺或萘胺的残基,C-NH₂,带有不多于一个不饱和抽电子基团;
D 是任选取代的噻吩-2,5-亚基或噻唑-2,5-亚基;以及
G 是芳香偶联组分 G-J 的残基,其中 J 是可被重氮化芳香胺置换的基团。
式 4 的染料表示为
其中
R¹² 是 C₁₋₆-烷基、C₄₋₈-环烷基或 C₂₋₆-烯基;
R¹³ 是 C₁₋₆-烷基或 C₂₋₆-烯基;和
R¹⁴ 是 H 或 C₁₋₆-烷基或 C₂₋₆ -烯基。