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We show that the maximal extension sl(2) times psl(2|2) times C3 of thesl(2|2) superalgebra can be obtained as a contraction limit of the semi-simplesuperalgebra d(2,1;epsilon) times sl(2). We reproduce earlier results on thecorresponding q-deformed Hopf algebra and its universal R-matrix by means ofcontraction. We make the curious observation that the above algebra is relatedto kappa-Poincar\'e symmetry. When dropping the graded part psl(2|2) we find anovel one-parameter deformation of the 3D kappa-Poincar\'e algebra. Ourconstruction also provides a concise exact expression for its universalR-matrix.

Maximally extended sl(2|2), q-deformed d(2,1;epsilon) and 3D kappa-Poincar\'e