Vinylic group containing dextran derivative gel for use in electrophoretic separation processes

Claim 1

A dextran derivative gel for use in electrophoretic separation processes, which gel comprises a polymerisate obtained by the free-radical homopolymerization of a dextran derivative containing vinylic groups of the formula ##STR3## in which A is --CH 2 or --O-- and R is a hydrogen atom, a methyl group, a trifluoromethyl group, a fluorine, chlorine or bromine atom or a cyano group, or free-radical copolymerization of such a vinylic derivative of dextran with a low-molecular weight monovinyl compound, the degree of substitution of the vinylic groups in the starting dextran derivative being 0.3 - 1.5 mmol/g of dextran derivative in the case of substituents of the formula (I) and 0.05 - 1 mmol/g of dextran derivative in the case of substituents of the formula (II) and the amount of dextran derivative containing vinylic groups being 20 - 100% by weight, calculated on the total weight of the reactants.