polyhydroxy

Foundry polyurethane binder comprises component Ⅰ, a polyhydroxy component whose main component is benzylic ether phenolic resin, component Ⅱ, a polyisocyanate, and a catalyst.

铸造用的聚氨酯主要有两组份构成，组份Ⅰ为多羟基化物，如苯醚型酚醛树脂为主要成份；

A water soluble polyhydroxy derivative of1,4| diazine has been isolated from Panax pseudoginseng var notoginseng for the first time.

三七水溶成中首次离得到一个多羟基吡嗪衍生物。