Verfahren zur Herstellung von Di-(bisphenol)-aethern und Polycarbonaten

摘要

Compounds of formula wherein M is H or an alkali metal, A is a divalent alkane, cycloalkane, aralkane or nuclear-halogen-substituted aralkane radical, A1 is a divalent radical derived by removal of the two halogen atoms from a dihaloalkane, dihaloalkene, dihalocycloalkane, dihaloalkyl cycloalkane, dihaloalkenyl cycloalkane, aryl dihaloalkane, aryl dihaloalkene or a dihaloalkane or dihaloalkene ether or polyether in which the ether-oxygen is separated by at least 2 carbon atoms from each of the two halogen atoms, X is a halogen atom or an alkyl radical and n is 0 or an integer from 1 to 4, are prepared by reacting the appropriate alkali metal diphenate and dihalo compound in a mole ratio from 3:1 to 10:1. Specifically claimed is ethylene di-[2,2-bis(4-hydroxyphenyl)propane] ether and its alkali metal diphenates.ALSO:Polycarbonates containing repeating units of formula are prepared by reacting phosgene with the appropriate di-(bisphenol)ether or its alkali metal disphenate. In the formula, A is a divalent alkane, cycloalkane, aralkane or nuclear-halogen-substituted aralkane radical, A1 is a divalent radical derived by removal of the two halogen atoms from a dihaloalkane, dihaloalkene, dihalocycloalkane, dihaloalkyl cycloalkane, dihaloalkenyl cycloalkane, aryl dihaloalkane, aryl dihaloakene or a dihaloalkane or dihaloalkene ether or polyether in which the ether-oxygen is separated by at least 2 carbon atoms from each of the two halogen atoms, X is a halogen atom or an alkyl radical and n is 0 or an integer from 1 to 4. A polycarbonate in which A is -C(CH3)2-, A1 is -CH2CH2- and n is 0, is preferred.