| 摘要 |
A process for the production of a lubricating oil additive concentrate comprises reacting at elevated temperature the following components:- component (A) a defined acid component (B) - a calcium base added either in a single addition or in a plurality of additions at intermediate points during the reaction, component (C) - at least one compound which is (i) water, (ii) a polyhydric alcohol having 2 to 4 carbon atoms, (iii) a di-(C3 or C4) glycol, (iv) a tri-(C2-C4) glycol, (v) a mono- or poly-alkylene glycol alkyl ether of the formula (I) R(OR<1>)xOR<2> (I) wherein R is a C1 to C6 alkyl group, R<1> is an alkylene group, R<2> is hydrogen or a C1 to C6 alkyl group and x is an integer from 1 to 6, (vi) a C1 to C20 monohydric alcohol, (vii) a C1 to C20 ketone, (viii) a C1 to C10 carboxylic acid ester, or (ix) a C1 to C20 ether, optionally, component (D) - a lubricating oil, component (E) - carbon dioxide added subsequent to the, or each, addition of component (B), and component (F) - a compound of formula II R<3>X (II) wherein X is a halogen and R<3> is an alkyl, alkenyl or alkaryl group or halo derivative thereof. |
