| 摘要 |
<p>The cleaning effectiveness of a microemulsion cleaning composition is improved by formulating it so as to contain at least 2 % by weight of a surfactant, be capable of absorbing at least 0.2 % by weight of oil by spontaneous emulsification when contacted therewith, and provide an interfacial tension not higher than 0.1 erg/cm2 when contacted with more oil than can be thus absorbed. Typically the compositions of the invention comprise 2-35 % by weight of the surfactant, 0-35 % by weight of a co-surfactant, 0.5-20 per cent by weight of an electrolyte, 0.5-45 % by weight of an oil, and 15-95 % by weight of water.</p> |
