摘要
蓖麻油经马来酸酐酯化得到羟基官能度为2.0～2.2的改性蓖麻油(MCO),将其作为多元醇成分与异佛尔酮二异氰酸酯(IPDI)、聚乙二醇1000(PEG1000)和二羟甲基丙酸(DMPA)等反应合成脂肪族耐光型聚氨酯复鞣填充剂(CPUF)。重点探讨了MCO/PEG1000、加料顺序、反应温度、DMPA用量和中和剂对乳液稳定性的影响。利用IR对聚氨酯复鞣剂的结构进行了表征。确定了工艺过程:改性蓖麻油首先同IPDI在70℃预聚40min,然后加入PEG1000和DMPA在80℃扩链100 min生成羟基终端的聚氨酯,其中m(MCO)∶m(PEG1000)=1∶1;中和剂选择三乙胺,聚氨酯复鞣剂中—COOH的质量分数为4%～5%。
A new type of polyurethane retanning agent （CPUF） with excellent lightfastness was synthesized by the reaction of maleic anhydride modified castor oil（MCO） with hydroxyl functionality of 2.0-2.2, isophorone diisocyanate（IPDI）, poly（ethylene glycol） （PEG1000） and dimethylol propionic acid（DMPA）.The effects of MCO/PEG1000, addition sequence, reaction temperatures, concentration of DMPA and neutralizer on the stability of CPUF emulsion were investigated. Fourier transform infrared spectroscopy（iR） was utilized to characterize CPUF structure. A preferred synthesis process was given as follows： MCO and IPDI prepolymerized at 70℃ for 40min, then chain extended with PEG1000 and DMPA at 80℃ for 100 min to get a hydroxyl terminated polyurethane, TEA was chosen neutralizer, m（MCO） ： m（PEG1000）=1 ： 1, the total content of -COOH was 4%-5%.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2006年第1期63-68,共6页
Chemical Industry and Engineering Progress
关键词
聚氨酯复鞣填充剂
蓖麻油
马来酸酐
合成
polyurethane retanningagnet
castor oil
maleicanhydride
synthesis
