Novel naphthalimide-derivative colorants are provided which are present in a neat liquid state at ambient temperature and pressure. Such colorants are produced through the reaction between 4-chloro (or bromo)-1,8 naphthalic anhydride and at least one etheramine, at least one branched alkylamine, or mixtures thereof. The inventive colorants are excellent leak detection agents for refrigeration and air conditioning systems. These naphthalimide derivatives are completely miscible in all different types of standard refrigeration and air conditioning lubricants. Furthermore, since these colorants are liquid, they are not susceptible to crystallizing within such systems. Thus, the inventive naphthalimide leak detecting agents cannot cause the failure of such machinery due to the crystallization of colorant and subsequent clogging of system compressors. Methods of making and using such inventive naphthalimide-derivative colorants are also disclosed.
本发明提供的新型
萘二甲
酰亚胺衍
生物着色剂在环境温度和压力下呈纯液体状态。这种
着色剂是通过 4-
氯(或
溴)-
1,8-萘二甲酸酐与至少一种醚胺、至少一种支链烷基胺或它们的混合物反应生成的。本发明的
着色剂是制冷和空调系统的优良检漏剂。这些
萘二甲
酰亚胺衍
生物可与所有不同类型的标准制冷和空调润滑剂完全混溶。此外,由于这些
着色剂是液态的,因此在此类系统中不易结晶。因此,本发明的
萘二甲
酰亚胺检漏剂不会因
着色剂结晶和随后的系统压缩机堵塞而导致此类机械故障。本发明还公开了制造和使用这种本发明
萘二甲
酰亚胺衍
生物着色剂的方法。