申请人:Wella Aktiengesellschaft
公开号:US06494923B2
公开(公告)日:2002-12-17
In the method of temporarily coloring and later decoloring hair a hair colorant is applied and allowed to remain on the hair for an exposure time of 10 to 45 minutes at 20 to 50° C. and then rinsed out. Then at a later time, as desired, the hair is decolorized. The aqueous hair colorant contains 0.01 to 5 percent by weight of at least one dye compound of formula (IV), or a physiologically tolerated salt thereof;
wherein n=0, 1 or 2 and R1 represents a C1- to C4-alkyl group, a hydroxyethyl group, a dihydroxypropyl group, a methoxyethyl group, a carboxyethyl group, a C1- to C4-sulfoalkyl group, an unsubstituted or substituted phenyl radical with halogen, sulfonic or carboxylic acid substituents; R2 represents a hydrogen, a methyl group, a carboxylic acid group, a carboxylic acid group esterified with a C1- to C4-alcohol or a carboxamido group; and Y represents an aromatic five-membered heterocyclic ring, which may or may not be benzoanellated.
在暂时染色和稍后褪色的方法中,将染发剂涂抹在头发上,并允许其在20到50°C的暴露时间内停留10到45分钟,然后冲洗掉。然后在稍后的时间,根据需要,将头发褪色。水基染发剂含有0.01至5重量%的至少一种式(IV)的染料化合物,或其生理上可耐受的盐; 其中n = 0,1或2,R1代表C1-至C4-烷基,羟乙基基团,二羟基丙基基团,甲氧基乙基基团,羧乙基基团,C1-至C4-磺酰基烷基基团,带有卤素,磺酸或羧酸取代基的未取代或取代的苯基基团; R2代表氢,甲基,羧酸基,与C1-至C4-醇酯化的羧酸基或羧酰胺基; Y代表一个芳香的五元杂环环,可能或可能不是苯并联的。