This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.

讨氯甲烷替代一氟三氯甲烷进行软质聚氨酯泡沫料的生产。

The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.

通过对其酰原理分析,选乙酰氯作酰、氯甲烷作酰溶,测定含环氧基聚酯的羟值。