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Citation: WANG Zheng-Hui, LIU Tian-Sui, ZHANG Yin-Quan, LIU Ru-Feng. Preparation of Low Temperature Curing Crosslinkers[J]. Chinese Journal of Applied Chemistry, ;2000, 17(2): 222-223. shu

Preparation of Low Temperature Curing Crosslinkers

1.
Department of Chemistry, Guangzhou Normal University, Guangzhou 510400

Received Date: 27 August 1999
Available Online: 27 December 1999

The blocking reaction of polyisocyanates with active hydrogen containing subs tances and the deblocking of the reaction products have been investigated by IR and TGA. The results showed that the initial deblocking temperature of the blocked polyisocyanates were mainly determined by active hydrogen substances. The deblocking temperature of toluene diisocyanate blocked with methylethylketoxime was 110℃ and this temperature could be more or less reduced by using organic tin catalyst at deblocking reaction.
- polyisocyanate,
- active hydrogen substance,
- blocking,
- deblocking,
- organictincom-pound
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