An N-(monosubstituted)dithiooxamide compound of the formula:
wherein R3 comprises:
(a) an alkyl or aralkyl group having 11 or more carbon atoms; or
(b) a group of the structure -R4-Y-R5 wherein: (i) when Y is a functional group selected from the group consisting of -N(R6)C(O)-, -C(O)N-(R6)-, -N(RG)-, -N(RG)C(0)0-, -OC(O)N(R6)-, and -N(R6)C(O)N(R7), wherein R6 and R7 are independently hydrogen, or an alkyl or aralkyl group having 1 to 12 carbon atoms: R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms; R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and, the total number of carbon atoms in R4 plus R5 is at least 7; or (ii) when Y is a functional group selected from the group consisting of -OC(O)-, -C(O)O-, and -OC(O)O-: R4 is a divalent alkyl or divalent aralkyl group having 1 to 12 carbon atoms; R5 is hydrogen, or an alkyl or aralkyl group having 1 to 20 carbon atoms; and, the total number of carbon atoms in R4 plus R5 is at least 9.
Preferred materials are those for which when the monosubstituent dithiooxamide is complexed with a transition metal cation, the resulting polymer is substantially a dark, i.e., blue or blue-black color. Carbonless paper constructions involving use of N-(monosubstituted)dithiooxamides to advantage are described.
一种 N-(单取代)二
硫代草酰
氨化合物,其式如下
其中 R3 包括
(a) 具有 11 个或更多
碳原子的烷基或芳烷基;或
(b) 结构为 -R4-Y-R5 的基团,其中(i) 当 Y 是选自以下组别的官能团时:-N(R6)C(O)-、-C(O)N-(R6)-、-N(RG)-、-N(RG)C(0)0-、-OC(O)N(R6)- 和-N(R6)C(O)N(R7),其中 R6 和 R7 独立地是
氢、或具有 1 至 12 个
碳原子的烷基或芳烷基:R4 是具有 1 至 12 个
碳原子的二价烷基或二价芳烷基;R5 是
氢、或具有 1 至 20 个
碳原子的烷基或芳烷基;且 R4 加 R5 中的
碳原子总数至少为 7;或 (ii) 当 Y 是选自-OC(O)-、-C(O)O-和-OC(O)O-的官能团时:R4 是具有 1 至 12 个
碳原子的二价烷基或二价芳烷基;R5 是
氢或具有 1 至 20 个
碳原子的烷基或芳烷基;且 R4 加 R5 中的
碳原子总数至少为 9。
当单取代基二
硫代草酰
氨与过渡
金属阳离子络合时,得到的
聚合物基本上呈深色,即蓝色或蓝黑色,这种材料是首选材料。本文介绍了使用 N-(单取代)二
硫代恶
酰胺的无
碳纸结构。