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

讨论了用二氯替代一氟三氯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.

通过对其理分析,选用乙氯作剂、二氯作溶剂,测定含环氧基聚酯的羟值。