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US5130454A Polytetrahydrofuran derivatives having terminal aromatic groups 失效
具有终端芳族基团的聚偏四氟醚衍生物

Polytetrahydrofuran derivatives having terminal aromatic groups
摘要:
Polytetrahydrofuran derivatives of the general formula ##STR1## where n is from 2 to 70, X is the bridge member --NH-- or --O-- and R.sup.1 and R.sup.4 are each hydrogen or various radicals.
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