This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.
讨论了用
替代一氟三进行软质聚氨酯泡沫塑料
生产。
，亚基This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.
讨论了用替代一氟三进行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
原理分析,选用乙酰作酰
、作酰溶,测定含环氧基聚酯羟值。
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