| 摘要 |
Polyhalogenated copolyethers containing recurring units of the formula <IMAGE> WHEREIN X is halogen selected from Br and Cl, m and n are each integers of 1 to 4 and each Q is selected from -CH2-, <IMAGE> wherein not more than 75 mole % of the Q groups are <IMAGE> said polyether having a weight average degree of polymerization of at least 50 and an inherent viscosity of at least 0.2.
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