POLYETHERS OBTAINABLE BY REACTING ALKYLOLATED BIS-(4- HYDROXYPHENYL)-METHANES WITH POLYALKYLENE OXIDES, AND THEIR USE AS OIL DEMULSIFIERS

摘要

Polyethers with are suitable as oil demulsifiers are obtainable by reacting A) a polyalkylene oxide obtained from ethylene oxide and propylene oxide and containing in total from 5 to 200 alkylene oxide units with B) an alkylolation product of a low molecular weight aldehyde and a bis-(4-hydroxyphenyl)-methane of the general formula II where R1 and R2 may be identical or different and are each hydrogen, low molecular weight alkyl, phenyl, carboxyl or low molecular weight alkoxycarbonyl, the molar reaction ratio of the compound of the formula II to the alkylolating aldehyde being from 1:1 to 1:4, at from 100 to 180.degree.C in the presence of an acidic catalyst with removal of the water of reaction, the weight ratio of A to B being from 5:1 to 1:3.