Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Compound of indeterminate structure – prepared by reacting a...
Patent
1996-11-18
1998-02-17
Howard, Jacqueline V.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Compound of indeterminate structure, prepared by reacting a...
508235, 508289, 508290, 5253276, C10M14902, C10M15912
Patent
active
057191085
ABSTRACT:
Dispersant/VI improvers for lubricating oil compositions are disclosed which comprise the reaction product of (a) a copolymer of octadecene-1 and maleic anhydride, the copolymer having a number average molecular weight from greater than 6300 to less than 12000; and (b) a succinimide prepared from a polyamine and an acyclic hydrocarbyl-substituted succinic acylating agent of the formula: ##STR1## wherein X and X.sup.1 are the same or different; provided that at least one of X and X.sup.1 is such that the copolymer can function as a carboxylic acylating agent, and optionally (c) a primary or a secondary hydrocarbyl monoamine or a mixture thereof, preferably an amine of the formula: ##STR2## wherein R.sup.1 is either a saturated or an unsaturated aliphatic hydrocarbyl group, and R.sup.2 is either R.sup.1 or hydrogen, and the total number of carbon atoms in the groups R.sup.1 and R.sup.2 is from 6 to 50, and optionally (d) a compound having at least two primary or secondary amino groups separated by at least three carbon atoms.
REFERENCES:
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patent: 3365399 (1968-01-01), Verdol et al.
patent: 3455827 (1969-07-01), Mehmedbasich et al.
patent: 4139417 (1979-02-01), Marie et al.
patent: 4735736 (1988-04-01), Chung
Jackson Pauline Bowden
Wilby Robert Ian
BP Chemicals (Additives) Limited
Howard Jacqueline V.
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