dicarboxylic acids

New surface-active oligomers were synthesized with the alternative placement of hydrophilic and lipophilic blocks based on substituted peroxide-containing oxetanes and polyesters of higher dicarboxylic acids and polyethylene glycols of different molecular weights. By acylation of peroxide-containing oxetane with dichloroanhydride decane and dodecanedioic acids, the corresponding bis (peroxyalkyloxetane) esters were synthesized.

The investigation results of the regularities of diesters of aliphatic dicarboxylic acids obtained in the presence of aprotic catalysts – Lewis acids – have been generalized. The effect of catalysts (metal salts) nature and concentrations, reagents nature and ratio, water content in them, as well as the influence of reaction temperature on the technological characteristics of esterification process have been determined. The technological aspects of the process have been examined in the presence of aprotic acids. The investigated catalysts may be reused in the technological process

The process of obtaining of aliphatic dibasic esters from dicarboxylic acids and C4-C5 alcohols in the presence of perfluoro(4–methyl–3,6–dioxaoctane)sulphonates of different metals has been researched. For the comparative estimation of catalysts their concentration was chosen identical and of such value that the rate of the process was limited exactly by the rate of chemical reaction. The dependences of technological characteristics of esterification process on catalyst nature and concentration and on reagents nature have been determined.