Through the experiment, it is found that the tack free time is affected greatly by the content of catalyst, dehydrating agent, plasticizer and the free NCO.

通过实验发现催化剂、脱水剂、增塑剂以及游离的异氰酸酯含量对密封胶的表干时间有很大的影响。

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Influences of process data, solvent, ration of-NCO and-OH on free-TDI content is also discussed.

介绍其反应工艺参数、溶剂、- NCO与- OH的配比等对游离tdi含量的影响。

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Emphases were placed on the side reactions in the measurement of free NCO in chain extended process. The account formula of the real content of free NCO was given.

重点探讨了扩链过程中对于游离nco基含量测定中存在的副反应，并给出实际NCO基含量的计算公式。

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