24小时热门版块排行榜

返回列表

当前主题已经存档。

【有奖交流】积极回复本帖子，参与交流，就有机会分得作者 ZANCAI 的 7 个金币

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

ZANCAI

新虫 (著名写手)

应助: 5 (幼儿园)
金币: 53.4
散金: 654
红花: 5
帖子: 1943
在线: 841.7小时
虫号: 398036
注册: 2007-06-10
专业: 绿色有机化学

[交流] 【求助】麻烦谁能帮我画出一个光固化聚氨酯反应过程的化学式子。

20 g of PEG-2000 and 100 ml of toluene are place into a four-necked vessel equipped with a stirrer, a flux condenser, a thermometer, and an inlet system for nitrogen gas. With stirring, 3.83 g of 2,4-Diisocyanatotoluene (TDI) is added dropwise. After addition, the temperature is increased to 55 oC and the mixed solution is stirred for 2h, then 45 mg of hydroquinone, 4.6 of hydroxyethyl acrylate (HEA), and 0.5 ml of dibutytin dilaurate are added and the reaction is continue to another 2h at 85 oC to obtain the precursor solution.
在甲苯中加入peg2000，然后是TDI，搅拌2h后加入对二苯酚45mg，还有HEA和二月硅酸二丁基锡反应一段时间。

[ Last edited by wellok101 on 2008-9-3 at 21:44 ]

回复此楼