Formulation of model cutting-oil water emulsions using paraffinic oil and ionic/nonionic surfactant mixture

Henri Bataller (1) , Christophe Dicharry (1) , Jean Lachaise (1) , Alain Graciaa (1)

1 TEFC - Thermodynamique et Energétique des fluides complexes

Cutting-oil emulsions are marketed under the shape of concentrates that the user has to dilute. More often these concentrates are monophasic microemulsions. We show that this kind of microemulsions may be obtained while relying on the generalized concept of Winsor, which guides the manipulation of three formulation parameters, which in turn rationally modify the surfactant interactions with the oily and the aqueous phases. The model concentrates that we have formulated contain six constituents. The oily phase is constituted of paraffinic oil and normal decanol. The aqueous phase is a solution of monoethanolamine borate in water whose hardness is fixed at 40°f. The active mixture contains a hydrophilic surfactant borate in water whose hardness is fixed at 40°f. The active mixture contains a hydrophilic surfactant and a lipophilic surfactant. We have formulated concentrates presenting an excellent ability to dilution, a very good stability to the hardness of water and pHs in agreement with the cutting fluid specification sheets, while identifying the formulation parameters to the mass ratio of normal decanol in the oily phase, to the mass ratio of monoethanolamine borate in the aqueous phase and to the mass ratio of the hydrophilic surfactant in the active mixture. Cutting-oil emulsions are marketed under the shape of concentrates that the user has to dilute. More often these concentrates are monophasic microemulsions. We show that this kind of microemulsions may be obtained while relying on the generalized concept of Winsor, which guides the manipulation of three formulation parameters, which in turn rationally modify the surfactant interactions with the oily and the aqueous phases. The model concentrates that we have formulated contain six constituents. The oily phase is constituted of paraffinic oil and normal decanol. The aqueous phase is a solution of monoethanolamine borate in water whose hardness is fixed at 40°f. The active mixture contains a hydrophilic surfactant and a lipophilic surfactant. We have formulated concentrates presenting an excellent ability to dilution, a very good stability to the hardness of water and pHs in agreement with the cutting fluid specification sheets, while identifying the formulation parameters to the mass ratio of normal decanol in the oily phase, to the mass ratio of monoethanolamine borate in the aqueous phase and to the mass ratio of the hydrophilic surfactant in the active mixture.

Mots clés: Engineering controlled terms: Alcohols; Boron compounds; Mixtures; pH; Surface active agents; Water Engineering uncontrolled terms: Decanol; Hydrophilic surfactant; Ionic surfactant; Lipophilic surfactant; Monoethanolamine borate; Monophasic microemulsion; Nonionic surfactant Engineering main heading: Microemulsions Fluids engineering descriptors: cutting fluid; model; oil-water emulsion

Domaines: Chimie-Physique [physics.chem-ph]

Henri Bataller, Christophe Dicharry, Jean Lachaise, Alain Graciaa. Formulation of model cutting-oil water emulsions using paraffinic oil and ionic/nonionic surfactant mixture. Journal of Dispersion Science and Technology, 2000, 21 (5), pp.571-588. ⟨hal-00685500⟩