| 摘要 |
This invention relates to a process for the polyoxyalkylation of aliphatic acids, and alpha , beta -unsaturated carboxylic acids in two stages. Monooxyalkylation is conducted with a quaternary ammonium salt catalyst, followed by the introduction of a boron trifluoride catalyst to effect the polyoxyalkylation stage. In one example, polymerizable emulsifying agents are prepared according to this invention which are nonionic alpha , beta -unsaturated dicarboxylic acid esters, having a hydrophilic non-ionic polyoxyalkyl radical portion alpha to or conjugated with a polymerizable double bond, and a hydrophobic ester radical portion beta to or unconjugated with the polymerizable double bond. Polymerdispersions thus formed may be used in the preparation of coating, impregnating and binding compositions.
|
