| 摘要 |
The invention provides an additive concentrate comprising an inert carrier fluid and from 10 to 80%w, based on the total concentrate, of a compound of the general formula <CHEM> in which R<1> and R<2> each represent a hydrogen atom, or together represent a carbon-carbon single bond; each of R<4> and R<5> independently represents a hydrogen atom, or a C1-C20 alkyl or phenyl group, each of which may be optionally substituted; R<6> represents a hydrogen atom, or a C1-C20 alkyl or phenyl group, each of which may be optionally substituted and R<7> represents a group -CH2-NHR<8> in which R<8> represents an optionally substituted alkyl group, or a group -COX wherein X represents an optionally substituted alkoxy group or -NHR<8> where R<8> is as defined above; or R<6> and R<7> together represent a group <CHEM> where R<8> is as defined above; x is 1 to 6; and each R<3> independently represents an optionally substituted alkyl or alkenyl group or a group of formula <CHEM> or -D-Y (IIIB> wherein m is in the range 0 to 25, n is in the range 1 to 20, each R<9> independently represents a hydrogen atom or a methyl or ethyl group, D is derived from a saturated or unsaturated hydrocarbon containing from 20 to 500 carbon atoms, and Y represents a group of formula <CHEM> in which R<1>, R<2>, R<4>, R<5> and R<6> are as defined above; x' is 0 to 5; R<3'> is as defined for R<3> other than a group of formula II, IIIA or IIIB, R<7'> represents a group R<7> as defined above or a group -CHO or -COOH, or R<6> and R<7'> together represent a group <CHEM> where R<8> is as defined above, each group R<3> containing a total of up to 550 carbon atoms, with the proviso that up to a maximum of 3 R<3> groups can each simultaneously contain a total of greater than 40 carbon atoms; lubricating oil and fuel compositions containing the formula I compounds; and the use of the formula I compounds as dispersant additives.
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