The invention concerns an organic composition comprising glycerol polycarbonates, mixed with polyglycerols, [(a-hydroxymethyl)oxyethylene/(a-hydroxymethyl ethylene carbonate) copolymers; optionally [(a-alkyl)oxyethylene/(a-alkyl) ethylene carbonate] copolymers, optionally [(a-alkyl)oxyethylene/(a-hydroxyalkyl)oxyethylene] copolymers, glycerol carbonate and/or other organic carbonates, glycerol and/or other co-produced and/or residual compounds and a method for producing said composition. The inventive composition or the homopolymers and copolymers constituting same, are applicable in the technical fields of hydraulic fluids, lubrication, wood treatment and decoration, fire-retardant treatment, detergency, oil prospecting and production, water treatment, cosmetics, pharmaceutics, food industry and chemical intermediates.