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US 7,786,057 B2Granted
Soot dispersants and lubricating oil compositions containing same
AssigneeInfineum International Limited
InventorsTushar K. Bera, Jacob Emert, Jun Hua
Life of this patent
Estimating the term…
Abstract
Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating, oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.
Claims16
Compounds of the formula:
- wherein:
- each Ar independently represents an aromatic moiety having 0 to 3 substituents selected from the group consisting of alkyl, alkoxy, alkoxyalkyl, hydroxy, hydroxyalkyl, acyloxy, acyloxyalkyl, acyloxyalkoxy, aryloxy, aryloxyalkyl, aryloxyalkoxy, halo and combinations thereof;
- each L is independently a linking moiety comprising a carbon-carbon single bond or a linking group;
- from about 98% to 2% of Y′ units are independently a moiety of the formula Z′O— and from about 2% to 98% of Y′ units are independently a moiety of the formula Z(O(CR2)n)yX—, wherein X is selected from the group consisting of (CR′2)z, O and S;
- R and R′ are each independently selected from H, C1 to C6 alkyl and aryl;
- z is 1 to 10;
- n is 0 to 10 when X is (CR′2)z, and 2 to 10 when X is O or S;
- y is 1 to 30;
- Z is H, an acyl group, a polyacyl group, a lactone ester group, and acid ester group, an alkyl group or an aryl group;
- Z′ is selected from C1 to C100 alkyl and aryl;
- each a is independently 0 to 3, with the proviso that at least one Ar moiety bears at least one group Z(O(CR2)n)yX— in which Z is not H;
- and
- m is 2 to 100.
10 more elements
Compounds of the formula:
- wherein
- each Ar independently represents an aromatic moiety having 0 to 3 substituents selected from the group consisting of alkyl, alkoxy, alkoxyalkyl, hydroxy, hydroxyalkyl, acyloxy, acyloxyalkyl, acyloxyalkoxy, aryloxy, aryloxyalkyl, aryloxyalkoxy, halo and combinations thereof;
- each L is independently a linking moiety comprising a carbon-carbon single bond or a linking group;
- each Y′ is are independently a moiety of the formula Z′O— or Z(O(CR2)n)yX—, wherein X is selected from the group consisting of (CR′2)z, O and S;
- R and R′ are each independently selected from H, C1 to C6 alkyl and aryl;
- z is 1 to 10;
- n is 0 to 10 when X is (CR′2)z, and 2 to 10 when X is O or S;
- y is 1 to 30;
- Z is H, an acyl group, a polyacyl group, a lactone ester group, and acid ester group, an alkyl group or an aryl group;
- Z′ is selected from C1 to C100 alkyl and aryl;
- each a is independently 0 to 3;
- one or more Y′ are groups Z(O(CR2)n)yX— in which Z is derived from lactone ester of formula IV, acid ester of formula V, or a combination thereof;
- wherein R1, R2, R3, R4 R5, R6 and R7 are independently selected from H, alkyl and polyalkyl and polyalkenyl containing up to 200 C;
- and Z″ is bis-acyl of formula VI;
- wherein R8 and R9 are independently selected from H, alkyl and polyalkyl and polyalkenyl containing up to 300 C;
- m is 0 to 100;
- and p and s are each independently from about 0 to about 25, with the proviso that p <m;
- s <m;
- and p+s>1.
16 more elements
Dependencies are inferred from the claim text.