| 摘要 |
PROBLEM TO BE SOLVED: To obtain a detergent compsn. which can efficiently remove water scale without corroding light metal parts of vehicles and has improved safety and biodegradability by incorporating an amino acid-N,N-diacetic acid (salt) and an anionic surfactant and/or a nonionic surfactant into the same. SOLUTION: 1-15 wt.%, pref. 5-10 wt.%. amino acid-N,N-diacetic acid (salt) of the formula (wherein A is methyl or a group of the formula: -Cn H2n -D; D is COOM or OH; M is H, an alkali metal, ammonium, or amine; m is 0-3; and n is 0-2), 1-20 wt.%, pref. 2-10 wt.%, anionic surfactant and/or nonionic surfactant, and necessary amts. of an inorg. builder and additives such as an org. acid, a dispersant, a buffering agent, and a mono- or polyhydric alcohol are dissolved in water, and the resultant soln. is adjusted to a pH of 5-12, pref. 6-11. |
