| 摘要 |
<p>Cleaning composition forming a stable microemulsion at ambient temperature contains: (A) 30-70 pts. wt. water, (B) 20-60 pts. wt. of a liquid organic solvent(s) and (C) 5-30 pts. wt. of a sulfonic acid ester surfactant. The organic solvent is selected from aliphatic alcohols, ketones, ethers and (di)esters, aromatic and (halogenated) aliphatic hydrocarbons, monoethers of mono-, di- and tri-ethylene glycols, (di)alkylene glycol diethers, (di)alkylene glycol ether acetates. The sulfonic acid ester surfactant is of formula R<1>-O-C(=O)-CH2-CH(SO3<->)-C(=O)-O-R<2> M<+> (I). R<1> and R<2> = 5-20C alkyl; M = Na, K or NR4; and R = H or 1-4C alkyl.</p> |
