Oil-in-water nanoemulsions. The internal oil phase contains oils selected from the group consisting of triglyceride oil and / or petrolatum, and the aqueous phase contains specific N-acyl derivatives of dicarboxylic amino acid salt as a surfactant. It also refers to procedures for preparing such nanoemulsions. Claim 1: Nanoemulsion composition comprising: a) an internal phase comprising 40 to 75% by weight of the total nanoemulsion composition of oils selected from the group comprising triglyceride, petrolatum and mixtures thereof, where the melting point Vaseline ranges from 30 to 60ºC;(b) The external aqueous phase, including the surface as diethylene glycol salt derivative N-acid salt salt salt or the total composition of the surface surfactant by weight (as active) from 2% to 15%; In (b) the surface surface includes 50% or more of all the surface surfaces where the water phase outside the nano emulsion exists; wherein (a) the average volume diameter of the oil drop is 20 to 500 nm. 11. Claim 10: personal care ingredients, including: (a) 90% to 99% by weight of nanolatex in accordance with any of the requirements of 1-9; (b) 0.1% to 3% ionic polymer;(c) 0.9% to 9% dispersants.Nanoemulsiones “aceite en agua”. La fase oleosa interna contiene aceites seleccionados entre el grupo compuesto por aceite de triglicéridos y/o vaselina, y la fase acuosa contiene derivados N-acilo específicos de sal de aminoácido dicarboxílico como surfactante. También se refiere a procedimientos para preparar dichas nanoemulsiones. Reivindicación 1: Composición de nanoemulsión que comprende: a) una fase interna que comprende del 40 al 75% en peso de la composición de nanoemulsión total de aceites seleccionados entre el grupo que comprende triglicérido, vaselina y mezclas de ellos, donde el punto de fusión de la vaselina oscila entre 30 y 60ºC; y b) una fase acuosa externa que comprende del 2 al 15% en peso (como activo) de la composición de nanoemulsión total de un surfactante o surfactant