Silanes with hydrophilic groups, their synthesis and use as surfactants in aqueous media

摘要

Silanes of the general formula are prepared wherein R1, R2 and R3 in the molecule are the same or different and represent aliphatic hydrocarbon groups, R4 is a divalent hydrocarbon group with 3 to 14 carbon atoms, R5 is a group having the formula -O(CH2)b- or a polyether group having the formula -(OCnH2n)c-, wherein b has a value of 1 to 6, n has an average value of 2 to 2.5 and c has a value of 1 to 10, R6 is an -OSO3X group or an -OR7 group, wherein X is a hydrogen, an alkali or an optionally substituted ammonium ion and R7 is an alkyl group with 1 to 4 carbon atoms or an acetyl group, a is 0 or 1, with the proviso that, when R6 represents the -OR7 group, a=1. The silanes are biologically degradable, resistant to hydrolysis and have pronounced surfactant properties.