| 摘要 |
PURPOSE:To obtain a cleansing agent with low toxicity or low odor, maintaining the detergency and not causing any environmental pollution by containing one or more compounds selected from a group of 2-pyrolidone, N-alkylpyrolidone and lactone. CONSTITUTION:There is contained one or more compounds selected from a group consisting of 2-pyrolidone, N-alkylpyrolidone and lactone. As an alkyl group of N-alkylpyrolidone, there is given a methyl group, a propyl group, and the like, and the alkyl group has 8 or below carbon atoms. If a compound represented by general formula R1O(CnH2nO)mR2 is used together, a cleansing effect increases. In the formula, each denotes that R1 is an alkyl group or a cycloalkyl group of 1-8C, R2 is hydrogen, alkyl group or a cycloalkyl group of 1-8C, (m) is integers of 1-4, (n) is integers of 2-3. The cleansing agent aforementioned is used for the supersonic cleansing of ink clinging to the screen printing board, and it is wide applicable without the risk of environmental destruction. |
