OLIGOMERIC DISPERSANTS BASED ON COPOLYMERS OF MALEAMIC ACIDS

The present invention refers to the preparation of novel oligomeric dispersants based on maleamic acid copolymers using itaconic acid. The copolymers derived from maleamic acids are considered environmentally friendly materials, as they are easily degraded. 1 These copolymers have other types of functional groups such as carboxylic acids, amide groups and hydrocarbon chains of different sizes, which generate an improved compatibility or miscibility with other hydrocarbon compounds, paraffin or mixtures of crude oil. The polar functional groups may modify the waxes so that leading to stable dispersions. The copolymers of maleamic polyacids were sintered by free radical polymerization, in mass or in water using ammonium persulfate as an initiator, which method is described. The dispersants were prepared as aqueous solutions from maleamic acid copolymers and were prepared as dispersants of CuO nanoparticles, tracking results at different times by light dispersion, measuring the size of t he particles and their distribution, which is related to the stability of the dispersions of Copolymers-Nanoparticles. The superficial properties of the copolymers were determined by calculating their critical micellar concentration by the interfacial tension-aqueous solution concentration curves and by means of the contact angle of solutions diluted at 0.1 mg/ml of the copolymer solutions. The uniform dispersion of the particles was probed by SEM microscopy. La presente invención trata sobre la preparación de nuevos dispersantes oligoméricos basados en copolímeros de ácidos maleámicos con ácido itacónico. Los copolímeros derivados de ácidos maleámicos son considerados materiales amigables con el medio ambiente, más fáciles de degradar.1 Estos copolímeros contienen otros tipos de grupos funcionales como ácidos carboxílicos, grupos amidas y cadenas hidrocarbonadas de diferentes tamaños, las cuales generan mejor compatibilidad o miscibilidad con otros compuestos hidrocarbonados, parafinas o mezclas de petróleo crudo. Los grupos funcionales polares pueden modificar las ceras conduciendo a dispersiones estables. Los copolímeros de poliácidos maleámicos fueron sintetizados mediante polimerización por radicales libres, en masa o en agua utilizando persulfato de amonio como iniciador, cuyo método se describe a detalle. Los dispersante se preparon como soluiones acuosas de los copolímeros de ácidos maleámicos, y se prepararon como dispersantes de nanopartículas de CuO, haciendo segui