Method for producing polyether polymers

Details Method for producing polyether polymers Method for producing polyether polymers

2006-10-24

2006-10-24

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

C502S150000, C528S125000, C528S126000, C528S196000

Reexamination Certificate

active

07125954

ABSTRACT:
A method of making a polyether polymer comprises reacting a salt of a dihydroxy-substituted aromatic hydrocarbon with a substituted aromatic compound of formula (I)in-line-formulae description="In-line Formulae" end="lead"?Z(A1—X1)2  (I)in-line-formulae description="In-line Formulae" end="tail"?in the presence of a catalyst to form an intermediate polymer having endgroups, wherein the molar ratio of the salt of a dihydroxy-substituted aromatic hydrocarbon to the substituted aromatic compound is less than 1, Z is an activating radical, A1is an aromatic radical and X1is fluoro, chloro, bromo or nitro; determining the additional amount of the salt of a dihydroxy-substituted aromatic hydrocarbon needed to form a final polyether polymer with a predetermined molecular weight and adding the additional amount of the salt of a dihydroxy-substituted aromatic hydrocarbon to the intermediate polymer.

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