A raw rubber for millable polyether polyurethane elastomer was prepared.

制一种新型的聚醚型聚氨酯生。

The mass spectra of ureide-type noncyclic polyethers with 2(3H)-benzoxazolone as end groups were studies.

2（3H）-唑酮为端基、具有酰脲结构的非环多醚化合物的质谱。