作　　者： ; ; ; (杨新宏）;

机构地区： 华南师范大学化学与环境学院化学系

出　　处： 《应用化学》 2005年第6期624-629,共6页

摘　　要： 用正丁醇改性合成了高相容性TDI三聚体,克服了单纯TDI三聚体与羟基丙烯酸树脂混溶性差的缺点,用所合成产物与羟基丙烯酸树脂配漆,漆膜微粒细小均匀。当采用自制催化剂、温度控制在60℃、n(—NCO)∶n(—OH)在10∶1左右时,得到固体含量在50%左右,二甲苯容忍度大于2.3、游离TDI含量小于1.5%的TDI三聚体。产物的热重分析结果表明,随—NCO与—OH摩尔比的增加,产物热稳定性增加;催化剂种类对产物热稳定性的影响不大,但产物的热稳定性随催化剂用量的增加而增加。 A dimethylbenzene-compatible TDI-trimer modified by n-butanol was synthesized, and used to prepare paints with different acrylic polyol resins. The paints prepared with the modified TDI-trimer have smaller and more uniform particles than those prepared with unmodified TDI-trimer. Good TDI-trimer was obtained when the reaction temperature was 60 ℃, the mole ratio of —NCO to —OH was 10∶1 and a new catalyst made in house was used. In the modified TDI-trimer, the solid content was about 50%. The tolerance of the modified TDI-trimer to dimethylbenzene was over 2.3 and free TDI in the sample was less than 1.5%. The thermal stability of the TDI-trimer was determined by thermogravimetric analysis(TGA). The thermal stability improved as —NCO/—OH ratio increased, and was not influenced by the type of the catalyst. However, the thermal stability increased when the content of the catalyst increased.

关 键 词： 甲苯二异氰酸酯三聚体 相容性 热重分析

领　　域： [理学] [理学]