Functionalized rubbers
AssigneeDynasol ElastóMeros, S.A.U.
InventorsSergio CORONA GALVÁN, Pedro José PÉREZ ROMERO, María del Mar DÍAZ REQUEJO, Álvaro BELTRÁN MARTÍN
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Abstract
The present invention relates to a process for the functionalization of a rubber polymer comprising reacting the rubber polymer with at least one source of nitrene or carbene, in the presence of a catalyst of formula TpxAg, wherein Tpx represents a hydrotris(pyrazolyl)borate ligand. This process leads to selective rubber functionalization without secondary reactions such as chain scission or cross linking and produces functionalized rubbers with improved compatibilization properties. The invention also refers to the polymer produced therefrom and to uses of said polymer.
Claims15
A process for the functionalization of a rubber polymer, comprising reacting the rubber polymer with at least one source of nitrene or carbene, in the presence of a catalyst of formula TpxAg, wherein Tpx represents a tris(pyrazolyl)borate ligand.
Rubber polymer, functionalized with at least one group —NHnSO2(C6H4)R1, wherein each occurrence of R1 is independently selected from H, C1-6 alkyl, C3-7 cycloalkyl, C6-10 aryl, I, Br, Cl, F, NO2, CF3, OR3, COOR3 and OCOR3, wherein R3 is independently selected from H, C1-6 alkyl, C3-7 cycloalkyl and C6-10 aryl, wherein n is 0 or 1, and wherein the rubber polymer is an optionally hydrogenated copolymer comprising conjugated diene and alkenyl aromatic monomers.
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Dependencies are inferred from the claim text.