Abstract: The invention relates to stable water in oil dispersions, of hydrosoluble cationic polymers based on salified or quaternized dimethylaminoethyl acrylate copolymerized or not with acrylamide, and containing more than 5%(in moles) of cationic units uniformly and not statistically distributed along the chains, presenting a composition by weight of from 20 to 55% of polymers, from 20 to 45% of oil, from 1 to 5% of at least two emulsifying agents, and the balance to 100% being water, the oil phase being a mixture of normal C.sub.10 -C.sub.13 alkanes, one of the emulsifying agents having an HLB of 3 to 5, and good solubility in the oil phase, and a lipophilous group of a carbonated ramified chain of at least 16C and the other having an average HLB of 12 to 16, the percentages by weight of both agents being from 0.5 to 3% relative to the weight of the dispersion.