| abstract |
The present invention is directed to chemical compounds of formula (I) wherein A1 is selected from the group consisting of alkyl, aryl, alkylaryl and (formula A), A2, A3, A4, A5 and in case A1 is (formula A) also A6 and A7 comprise a polymer selected from the group consisting of [EO] k [XO] m , [PO] p [EO] q , [EO] k [XO] m [EO] n and [PO] p [EO] q [XO] m with [XO] being [PO] or [BuO] and with EO having the meaning of ethylene oxide, PO having the meaning of propylene oxide and BuO having the meaning of butylene oxide. |