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

研究以2（3H）-苯并唑酮为端基、具有酰脲结构的非环多化合物的质谱。

A raw rubber for millable polyether polyurethane elastomer was prepared.

研制新的氨酯生胶。