申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0605286A1
公开(公告)日:1994-07-06
A thermal-dye-bleach construction comprising a polymethine dye having a nucleus of general formula I:
wherein:
n is 0, 1, 2 or 3;
W is selected from: hydrogen, alkyl groups of up to 10 carbon atoms, alkoxy and alkylthio groups of up to 10 carbon atoms, aryloxy and arylthio groups of up to 10 carbon atoms, NR¹R², and NR³R⁴;
R¹ to R⁴ are each independently selected from the group consisting of alkyl groups of up to 20 carbon atoms, alkenyl groups of up to 20 carbon atoms; and aryl groups of up to 14 carbon atoms; or
R¹ and R² together and/or R³ and R⁴ together may represent the atoms necessary to complete a 5- or 6-membered heterocyclic ring group; or one or more of R¹ to R⁴ may represent the atoms necessary to complete a 5- or 6-membered heterocyclic ring group fused to the phenyl ring on which the NR¹R² or NR³R⁴ group is attached;
R⁵ and R⁶ are each independently selected from the group consisting of hydrogen atoms, alkyl groups of up to 20 carbon atoms, aryl groups of up to 20 carbon atoms, heterocyclic ring groups comprising up to 6 ring atoms, carbocyclic ring groups comprising up to 6 carbon atoms; and fused ring and bridging groups comprising up to 14 ring atoms;
and, X⁻ is an anion;
in association with a thermal-carbanion-generating agent having the general formula:
in which each of R⁹ and R¹⁰ is a monovalent group such as hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aralkyl group, an aryl group, and a heterocyclic group,
M⁺ is a cation which will not react with the carbanion generated from said thermal carbanion generating agent in such manner as to render said carbanion ineffective as a bleaching agent for said polymethine dye.
p is one or two, and when p is one, Z is a monovalent group selected from: an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, and a heterocyclic group, and; when p is two, Z is a divalent group selected from: an alkylene group, an arylene group, a cycloalkylene group, an alkynylene group, an aralkylene group, an alkenylene group, and a heterocyclic group.
一种热染色漂白结构,包含一种具有通式 I 原子核的聚甲基染料:
其中
n 是 0、1、2 或 3;
W 选自:氢、最多 10 个碳原子的烷基、最多 10 个碳原子的烷氧基和烷硫基、最多 10 个碳原子的芳氧基和芳硫基、NR¹R² 和 NR³R⁴;
R¹ 至 R⁴ 各自独立地选自由碳原子数不超过 20 个的烷基、碳原子数不超过 20 个的烯基和碳原子数不超过 14 个的芳基组成的组;或
R¹ 和 R² 合在一起和/或 R³ 和 R⁴ 合在一起可代表完成 5 或 6 元杂环基团所需的原子;或 R¹ 至 R⁴ 中的一个或多个可代表完成与 NR¹R² 或 NR³R⁴ 基团所连接的苯环融合的 5 或 6 元杂环基团所需的原子;
R⁵ 和 R⁶ 各自独立地选自由氢原子、最多 20 个碳原子的烷基、最多 20 个碳原子的芳基、最多 6 个环原子的杂环基团、最多 6 个碳原子的碳环基团和最多 14 个环原子的融合环和桥基组成的组;
X- 是阴离子;
与具有通式的热-碳离子生成剂结合:
其中 R⁹和 R¹⁰ 各为单价基团,如氢、烷基、烯基、环烷基、芳基、芳基和杂环基、
M⁺ 是阳离子,它不会与所述热碳酸根生成剂生成的碳酸根发生反应,从而使所述碳酸根不能作为所述聚甲醛染料的漂白剂。
p为1或2,当p为1时,Z为选自以下基团的一价基团:烷基、环烷基、烯基、炔基、芳基、芳基和杂环基;当p为2时,Z为选自以下基团的二价基团:烯基、芳基、环烷基、炔基、芳基、烯基和杂环基。