A detergent composition which is a bleach-free, under-built composition containing at least one surfactant and having a sequestration value such that an aqueous solution containing 7000 ppm of the detergent composition sequesters a maximum of 30 mg CaO per gram of detergent composition at 20°C, is characterised in that the composition contains a hydroxamic acid or a salt thereof, the hydroxamic acid having the formula
R--R′
where R represents an optionally substituted straight- or branched chain C₅₋₂₁ alkyl or C₅₋₂₁ alkenyl group or an optionally-substituted phenyl group, and R′ represents hydrogen, an optionally substituted C₁₋₆ alkyl group, or an optionally-substituted phenyl group, but with the limitation that the hydroxamic acid has a hydrophile-lipophile balance (HLB) within the same range as the range of HLB's of hydroxamic acids of the above formula wherein R is an unsubstituted C₅₋₂₁ alkyl group and R′ is hydrogen or an unsubstituted C₁₋₆ alkyl group. Typical hydroxamic acids are dodecanohydroxamic acid and N-methyl dodecanohydroxamic acid.
一种洗涤剂组合物,它是一种不含漂白剂的底层组合物,含有至少一种表面活性剂,并具有一定的螯合值,使含有 7000 ppm 该洗涤剂组合物的
水溶液在 20°C 时每克洗涤剂组合物最多可螯合 30 毫克 CaO,其特征在于该组合物含有羟
肟酸或其盐,羟
肟酸的式为
R--R′
其中 R 代表任选取代的直链或支链 C₅₋₂₁ 烷基或 C₅₋₂₁ 烯基或任选取代的苯基,R′ 代表氢、任选取代的 C₁₋₆ 烷基或任选取代的苯基、但羟
肟酸的亲
水-亲脂平衡(HLB)必须与上式羟
肟酸的 HLB 范围相同,其中 R 是未取代的 C₅₋₂₁烷基,R′是氢或未取代的 C₁₋₆烷基。典型的羟
肟酸是
十二烷氧基羟
肟酸和 N-甲基
十二烷氧基羟
肟酸。