| 摘要 |
PURPOSE:To obtain a cleaner composition which is harmless to man and beast and excellent in safeness and an ability to remove dirt and does not cause environmental pollution by mixing a hydrocarbon fraction based on a naphthene component, a specified solvent, a surfactant, an enzyme and a small amount of water. CONSTITUTION:The title composition comprises 100 pts.wt. hydrocarbon fraction based on a naphthenic component which boils at 150-240 deg.C and is obtained by removing naphthalene and biphenyl on a rectifier from a residual oil obtained by effecting the aromatic nucleus hydrogenation of a kerosene fraction which boils 150-300 deg.C and separating and removing at least part of the n-paraffins from the product of hydrogenation with a molecular sieve made of a synthetic zeolite, 0-40 pts.wt. at least one member selected from among a 3-18 C aliphatic monoalcohol, an ether, an ester, a compound of the formula (wherein R is aliphatic hydrocarbon group; and n is 1-4) and an aprotic polar solvent, 0.1-20 pts.wt. surfactant, 0.001-5 pts.wt. enzyme and a small amount of water. |
