| abstract |
Hydrolytic degradation of oleaginous fluids susceptible to hydrolytic degradation in the presence of moisture and the development of acidity in adventitious water are inhibited by including in the oleaginous fluids at least one oil-soluble compound containing at least one 3,5-dihydrocarbyl-4-hydroxybenzyl group attached to a primary, secondary or tertiary amino nitrogen atom, the two alpha-positions of the benzyl group being substituted by two hydrogen atoms, by two organic groups, or by one hydrogen atom and one organic group. Other phenolic compounds such as hindered phenolic antioxidants are incapable of providing such protection against hydrolytic degradation and acid buildup. |