Compound of formula below, and also the addition salts thereof with an organic or mineral base, the solvates, and mixtures thereof: in which: - the groups R 1 and R 2, which may be identical or different, represent, independently of each other, a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group, comprising from 1 to 6 carbon atoms, it being understood that the sum of the carbon atoms of the groups R 1 and R 2 ranges from 2 to 7, R 1 and R 2 may form, together and with the carbon atom that bears them, a 6-, 7- or 8-membered ring, - n is an integer between, limits inclusive, 1 and 100, preferably between 2 and 100, more preferably between 3 and 100, more particularly between 5 and 100 and very preferably between 10 and 100, - A represents a sequence of one or more units chosen from ethylene oxide, propylene oxide and butylene oxide units, and mixtures thereof, - G denotes the group -O- p -R 5, in which R 5 represents a group chosen from a hydrogen atom or a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group, comprising from 1 to 30 carbon atoms, B represents a sequence of one or more units chosen from ethylene oxide, propylene oxide and butylene oxide units, and mixtures thereof, and p denotes an integer ranging from 0 to 100, - J denotes the group -O- s -R 6, in which R 6 represents a group chosen from a hydrogen atom or a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group, comprising from 1 to 30 carbon atoms, E represents a sequence of one or more units chosen from ethylene oxide, propylene oxide and butylene oxide units, and mixtures thereof, and s denotes an integer ranging from 0 to 100, - m denotes an integer ranging from 1 to 3, - q and r denote integers ranging from 0 to 2, it being understood that m + q + r = 3. - the groups R 1 and R 2, which may be identical or different, represent, independently of each other, a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group, comprising from 1 to 6 carbon atoms, it being understood that the sum of the carbon atoms of the groups R 1 and R 2 ranges from 2 to 7, R 1 and R 2 may form, together and with the carbon atom that bears them, a 6-, 7- or 8-membered ring, - n is an integer between, limits inclusive, 1 and 100, preferably between 2 and 100, more preferably between 3 and 100, more particularly between 5 and 100 and very preferably between 10 and 100, - A represents a sequence of one or more units chosen from ethylene oxide, propylene oxide and butylene oxide units, and mixtures thereof, - G denotes the group -O- p -R 5, in which R 5 represents a group chosen from a hydrogen atom or a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group, comprising from 1 to 30 carbon atoms, B represents a sequence of one or more units chosen from ethylene oxide, propylene oxide and butylene oxide units, and mixtures thereof, and p denotes an integer ranging from 0 to 100, - J denotes the group -O- s -R 6, in which R 6 represents a group chosen from a hydrogen atom or a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group, comprising from 1 to 30 carbon atoms, E represents a sequence of one or more units chosen from ethylene oxide, propylene oxide and butylene oxide units, and mixtures thereof, and s denotes an integer ranging from 0 to 100, - m denotes an integer ranging from 1 to 3, - q and r denote integers ranging from 0 to 2,