Polyarylene polyether made using mixed base system

Details Polyarylene polyether made using mixed base system Polyarylene polyether made using mixed base system

C - Chemistry, Metallurgy

08

G

402/359

C08G 65/40 (2006.01) C08G 65/48 (2006.01)

Patent

CA 1250996

POLYARYLENE POLYETHER MADE USING MIXED BASE SYSTEM Abstract of the Disclosure Polyarylene polyethers, made by a process comprising reacting a dihydroxy compound and strong and weak bases in a liquid reaction medium at 100-200°C to form a double salt and then reacting the double salt with a slight molar excess of dihalobenzenoid compound bearing two replaceable halogens, are disclosed. The process reliably produces halogen-terminated polyarylene polyethers of select degrees of polymerization and desirable correspondence between weight and number average molecular weights. In subsequent steps amine-terminated polyarylene polyethers are made using the strong and weak bases. The resulting amine-terminated polyethers have a low, select degree of polymerization, desirable correspondence between weight and number average molecular weights and high level of amine-termination. The amine-terminated polyarylene polyether sulfones of this invention have use in making tough epoxy thermosets.

501996

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