This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.
讨论了用二氯甲
替代一氟三氯甲
软质聚氨酯泡沫塑料
生产。
，亚甲基氯This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.
讨论了用二氯甲替代一氟三氯甲软质聚氨酯泡沫塑料生产。
The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.
通过对其酰化原
,选用乙酰氯作酰化剂、二氯甲作酰化溶剂,测定含环氧基聚酯羟值。
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