| abstract |
Additives for lubricating oils, especially automatic transmission fluids, are disclosed comprising a heterocyclic compound containing boron and of the formulan wherein R is inorganic or organic and R₁ and R₂ are the same or different organic radicals, in admixture with or as the reaction product of reaction with an ester of a polyhydric alcohol. The boron-containing heterocyclic compound may contain sulfur. It may comprise the product of reacting together ammonia or a primary amine, an aliphatic or aromatic epoxide and a boric acid in a ratio of 1: 2: 1. Lubricating oils and transmission fluids containing these additives are also disclosed. |