申请人:The Procter & Gamble Company
公开号:EP2290047A1
公开(公告)日:2011-03-02
The present application relates to a process of colour neutralizing treatment liquids, wherein the treatment liquid comprises a chromophore selected from the group consisting of monoazo, triarylmethane, xanthene, anthraquinone, hydrophobic dyes, and mixtures thereof, wherein the hydrophobic dyes are selected from the group consisting of benzodifuranes; methine; triphenylmethanes; naphthalimides; pyrazole; naphthoquinone; mono-azo, di-azo dyes and mixtures thereof, said process comprising the steps of :
i. providing a mixing vessel with the treatment composition comprising the chromophore;
ii. providing to the mixing vessel more than 0.045% of a reducing agent selected from the group consisting of sulfite, thiodiurea, formaldehyde bisulfite formaldehyde sulfoxilate and mixtures thereof; and
iii. mixing until discolouration by color neutralization of the chromophore is achieved.
本申请涉及一种对处理液进行颜色中和的工艺,其中处理液包含选自由单偶氮、三芳基甲烷、呫吨、蒽醌、疏水性染料及其混合物组成的组中的发色团,其中疏水性染料选自由苯并二呋喃、甲烷、三苯基甲烷、萘二甲酰亚胺、吡唑、萘醌、单偶氮、二偶氮染料及其混合物组成的组中的发色团;甲烷;三苯基甲烷;萘二甲酰亚胺;吡唑;萘醌;单偶氮、二偶氮染料及其混合物,所述工艺包括以下步骤 :
i. 向混合容器中提供包含发色团的处理组合物;
在混合容器中加入 0.045%以上的还原剂,该还原剂选自亚硫酸盐、硫代脲、甲醛亚硫酸氢盐、甲醛硫酸盐及其混合物;以及
iii. 一直搅拌到发色团中和变色为止。