2,2-bis-(4-hydroxyphenyl)-alkyl onium salt and a process for the preparation thereof
申请人:Council of Scientific and Industrial Research
公开号:EP1818336A1
公开(公告)日:2007-08-15
The present invention provides a novel 2,2-bis(4-hydroxyphenyl)-alkyl onium salts as illustrated by 2,2-bis(4-hydroxyphenyl)-tridecyl(1,2-dimethylimidazolium) bromide and the process for preparation thereof by hydroxyalkylating acetoacetate to the corresponding hydroxyalkylacetoacetate, dealkoxycarbonylating the hydroxyalkyl acetoacetate to ω-hydroxyalkan-2-one and contacting the ω-hydroxyalkan-2-one with phenol in the presence of an acidic catalyst to give 2,2-bis(4-hydroxyphenyl)alkanol, brominating the 2,2-bis(4-hydroxyphenyl)alkanol to 2,2-bis(4-hydroxyphenyl)alkyl bromide, quaternizing 1,2-dimethylimidazole with the 2,2-bis(4-hydroxyphenyl)alkyl bromide to 2,2-bis(4-hydroxyphenyl)alkyl(1,2-dimethylimidazolium) bromide. The products can be used as reactive modifiers for layered phyllosilicates that can be used in the preparation of polymer-nanocomposites, wherein the said polymers are prepared from 2,2-bis(4-hydroxyphenyl)propane as one of the reacting monomers.
本发明提供了一种新颖的2,2-双(4-羟基苯基)-烷基季铵盐,例如2,2-双(4-羟基苯基)-十三烷基(1,2-二甲基咪唑)溴化物,并提供了其制备方法,通过将乙酰丙酮酸酯羟烷基化成相应的羟基烷基丙酮酸酯,去羟基羧基化羟基烷基丙酮酸酯成ω-羟基烷基-2-酮,将ω-羟基烷基-2-酮与苯酚在酸性催化剂存在下接触以得到2,2-双(4-羟基苯基)烷醇,将2,2-双(4-羟基苯基)烷醇溴化成2,2-双(4-羟基苯基)烷基溴化物,将1,2-二甲基咪唑与2,2-双(4-羟基苯基)烷基溴化物季铵化成2,2-双(4-羟基苯基)烷基(1,2-二甲基咪唑)溴化物。这些产品可用作层状硅酸盐的反应改性剂,可用于制备聚合物-纳米复合材料,其中所述聚合物是由2,2-双(4-羟基苯基)丙烷作为其中一个反应单体制备的。