| 摘要 |
<p>Sulphur-containing borate esters for use in lubricants appropriate to modern oil requirements with reduced or zero amounts of phosphorous and without the need for large amounts and/or expensive forms of antioxidant and additional anti-wear additives are of the formula: <CHEM> wherein each R is a hydrocarbyl group optionally substituted by one or more -XR'' group, or the two R groups attached to one boron represent a group -(R'CH)m-, x is 1 or 2, each n is from 1 to 6, each m is from 2 to 4 and each R' is hydrogen, an -XR'' group, or a hydrocarbyl radical optionally substituted by one or more -XR'' group, X is 0, S or NR'' and R'' is hydrogen, a hydrocarbyl radical or a hydrocarbylcarbonyl group.</p> |
