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US6043338A Method of producing polyoxytetramethylene glycol 失效
生产聚氧四亚甲基二醇的方法

Method of producing polyoxytetramethylene glycol
摘要:
In a process for the preparation of copolymers of tetrahydrofuran and but-2-yne-1,4-diol by catalytic polymerization of tetrahydrofuran, the polymerization is carried out over a heterogeneous acidic catalyst which has acid centers of acidity pK.sub.a
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