초록 ▼

Production of aromatic polyethers by reacting (i) a mixture of a bisphenol and a dihalobenzenoid compound or (ii) a halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by ortho or para －SO2－or －CO－groups, with an alkali metal (bi)carbonate, wherein the reactio

Production of aromatic polyethers by reacting (i) a mixture of a bisphenol and a dihalobenzenoid compound or (ii) a halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by ortho or para －SO2－or －CO－groups, with an alkali metal (bi)carbonate, wherein the reaction is carried out in the absence of a solvent and in the presence of an infusible particulate support substance, preferably inorganic or polymeric, yielding a reaction medium in the form of a free-flowing powder by the end of the reaction.

대표청구항 ▼

A process for the production of an aromatic polyether containing linkages selected from the group consisting of －SO2－and －CO－groups comprising heating in a reaction vessel, a reaction medium comprising (i) a substantially equimolar mixture of (a) at least one bisphenol and (b) at least one dihaloben

A process for the production of an aromatic polyether containing linkages selected from the group consisting of －SO2－and －CO－groups comprising heating in a reaction vessel, a reaction medium comprising (i) a substantially equimolar mixture of (a) at least one bisphenol and (b) at least one dihalobenzenoid compound, or (ii) at least one halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by －SO2－or －CO－ groups ortho or para thereto, with at least one alkali metal carbonate or bicarbonate to effect a polycondensation reaction to form the aromatic polyether, the amount of carbonate or bicarbonate being such that there is at least one alkali metal atom for each phenol group present, wherein the polycondensation reaction is carried out in the absence of a solvent and in the presence of a sufficient quantity of an infusible, under the conditions of reaction, particulate substance acting as a support for the polyether which is formed in the polycondensation reaction so as to yield by the end of the polycondensation reaction, a reaction medium in the form of a free-flowing powder which includes the aromatic polyether and the particulate substance and which may be discharged cleanly from the reaction vessel.