申请人:Kao Corporation
公开号:EP1238649A2
公开(公告)日:2002-09-11
A hair dye composition comprises the following ingredients (A) and (B):
(A) a compound having a 5- or 6-membered lactone skeleton, and
(B) an acid dye; and
having a pH of from 2 to 6 and a buffer capacity not lower than 0.004 gram equivalent/L but lower than 0.2 gram equivalent/L as measured in a form of a tenfold dilute aqueous solution. This hair dye composition does not cause staining to the skin, is excellent in dyeing properties for hair, is good in the fastness to shampoo, and does not give off gas through hydrolysis in an acidic range.
染发剂组合物由以下成分(A)和(B)组成:
(A) 具有 5 或 6 元内酯骨架的化合物,和
(B) 酸性染料;以及
pH 值为 2 至 6,缓冲能力不低于 0.004 克当量/升,但低于 0.2 克当量/升(以十倍稀释水溶液的形式测量)。这种染发剂组合物不会对皮肤造成染色,染发性能优越,对洗发水的牢度好,在酸性范围内不会因水解而产生气体。