申请人:KAO Corporation
公开号:US05378244A1
公开(公告)日:1995-01-03
A dye composition for keratinous fibers which contains a coupler and a developer are disclosed. The present coupler component is a novel 2-alkoxy-3,5-diaminopyridine derivatives of the formula (1): ##STR1## wherein R1 and R2 are the same or different from each other and independently represent a hydrogen atom, a lower alkanoyl group or a lower alkyl group which may be substituted by at least one hydroxyl group, and R3 is a lower alkyl group which may be substituted by at least one hydroxyl group, or a salt thereof; provided that R1 and R2 are not both a hydrogen atom or an acetyl group at the same time. The present 2-alkoxy-3,5-diaminopyridine derivatives are useful as couplers in dye compositions, and are capable of dyeing keratinous fibers such as hair in a bright blue color with excellent dyeability. Dye compositions containing the present compounds as a coupler show excellent resistance to discoloration, excellent resistance to shampooing and excellent resistance to friction.
本发明揭示了一种用于角蛋白纤维的染料组合物,其中包含偶合剂和显色剂。现在的偶合剂组分是一种新型的2-烷氧基-3,5-二氨基吡啶衍生物,其化学式为(1):##STR1##其中R1和R2相同或不同,独立地代表氢原子、较低的烷酰基或较低的烷基,其可以被至少一个羟基取代,而R3是较低的烷基,其可以被至少一个羟基取代,或其盐;前提是R1和R2不能同时是氢原子或乙酰基。现在的2-烷氧基-3,5-二氨基吡啶衍生物在染料组合物中作为偶合剂是有用的,并且能够以极好的染色性使角蛋白纤维如头发呈现出明亮的蓝色。含有现在化合物作为偶合剂的染料组合物表现出极好的抗变色性、优异的抗洗发和抗摩擦性。