The method is characterized in that: mixture of macromolecular dihydric alcohol and a dihydroxybutyl-terminated polydimethylsiloxane is dehydrated, added with diisocyanate for reaction, then added with a bis propionic acid, a dihydric alcohol chain extender and a catalyst - dibutyl tin laurate, and is diluted by acrylic ester; temperature reduction and emulsion are performed on the mixture after reaction; chain extension reaction is performed in water by a multi-amine chain extender, and siloxane modified polyurethane dispersoid which contains acrylic ester monomer is prepared; and an initiator - potassium persulphate is added into the siloxane modified polyurethane dispersoid for emulsion polymerization.
特征是先将大分子二元醇与二端羟丁基聚二甲基硅氧烷的混合液脱水后加入二异氰酸酯，反应后加入二羟甲基丙酸、二元醇扩链剂和催化剂二月桂酸二丁基锡，并用丙烯酸酯进行稀释，反应后降温乳化，用多元胺扩链剂在水中进行扩链反应，得到含有丙烯酸酯单体的硅氧烷改性聚氨酯分散体，然后再通过加入引发剂过硫酸钾进行乳液聚合。
By way of analyzing MS, NMR and IR spectra, their structures were characterized. Their structures were identified as CPF 10, 2-(2-carbazolyl) propionic acid; CPF 28, 2-(2-carbazolyl) propionic acid, methyl ester; and CPF 48, 2-(6-chloro-2- carbazolyl) propionic acid, methyl ester.
藉由质谱仪、红外线光谱仪、核磁共振氢谱及碳谱判断：CPF 10为2-(2-carbazolyl) propionic acid；CPF 28为2-(2-carbazolyl) propionic acid，methyl ester；而CPF 48为2-(6-chloro-2-carbazolyl) propionic acid，methyl ester。
A salt or an ester of propionic acid.
高氯酸形成的一种盐。
Producing Creatin monohydrate, Ctreatine anhydrous, Taurine, Tri-Craetine citrate, Tricreatine Malate, Creatine Ethyl ester Glycocyamine, Guanidino propionic acid, etc.
生产一水肌酸，无水肌酸，肌酸乙酯，牛磺酸，三肌酸苹果酸，三肌酸柠檬酸，胍基乙酸，胍基丙酸，肌氨酸钠，面粉增白剂等食品添加剂等。
OBJECTIVE To investigate the major metabolites of eugenol ibuprofen ester propionic acid.
目的研究鉴定丁香酚布洛芬酯在大鼠体内的代谢行为。
The Studies of Catalysis and Chemical Reaction Engineering on Hydroesterification of Ethylene to Synthesis of Propionic Ester
乙烯氢酯基化合成丙酸酯的催化及反应工程研究
Using borneol, isoborneol, acetic acid, propionic acid, butyric acid and isobutyric acid as the raw materials and nanometer solid superacid S2 O 82 -/ZrO2 as the catalyst for the first time, eight borneol and isoborneol ester compounds were prepared.
以冰片、异冰片、乙酸、丙酸、丁酸、异丁酸为原料，首次采用纳米固体超强酸S2O28-/ZrO2催化合成了8个冰片、异冰片酯。