Foundry polyurethane binder comprises component Ⅰ, a polyhydroxy component whose main component is benzylic ether phenolic resin, component Ⅱ, a polyisocyanate, and a catalyst.
铸造用的聚氨酯粘合剂主要有
份构成，份Ⅰ为多羟基化合物，如苯醚型酚醛树脂为主要成份；
Foundry polyurethane binder comprises component Ⅰ, a polyhydroxy component whose main component is benzylic ether phenolic resin, component Ⅱ, a polyisocyanate, and a catalyst.
铸造用的聚氨酯粘合剂主要有份构成，份Ⅰ为多羟基化合物，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.
三七水溶性成分中首次分离得到一个多羟基吡嗪衍生物。
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