Frank Bachmann,Christian Cremer,Beate Froehling,Bryan Patrick Murphy,Guiru Zhang,Peter Marte Torgerson
申请号：
US15557594
公开号：
US10494527B2
申请日:
2016.03.18
申请国别(地区):
US
年份:
2019
代理人:
摘要：
The invention relates to cationic direct dyes of the formula I (1), wherein m and n are independently from each other 0 or 1, D is an aromatic or a cationic heteroaromatic group, which are further specified, K is an aromatic or heteroaromatic group, E1 and E2 are independently from each other ═；CH—； or ═；N—；, An is an anion and a is a number from 1 to 6 and R1 and R2 are independently from each other and further specified. The compounds show washfastness at hair-dying.
