Ashless dispersants comprising reaction product of acylating agent and aminoguanidine
AssigneeEthyl Corporation
InventorsAnthony J. Rollin, Joseph J. Valcho
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Abstract
Ashless dispersants are formed using polymers of propylene characterized in that they are liquid substantially linear polymers, they have stereo-irregularity in the polymer chain, at least 60 mol percent of the polymer has a terminal vinylidene group and, optionally, the polymer contains up to 25 mol percent of ethylene or a C.sub.4 to C.sub.10 monoolefin polymerized into the polymer chains.
Claims10
An ashless dispersant having in its chemical structure at least one aliphatic hydrocarbyl substituent derived from a liquid, linear polymer of propylene, said polymer having stereo-irregularity and optionally containing up to 25 mol percent of ethylene or C.sub.4 to C.sub.10 monoolefin polymerized into the polymer chain, at least 60 mol percent of said polymer having a terminal vinylidene group, said dispersant being a product formed by reacting (i) an alkenyl succinic acylating agent having said substituent thereon and (ii) a basic salt of aminoguanidine wherein the molar ratio of said aminoguanidine to said acylating agent is in the range of about 1.4:1 to about 2.2:1 such that the product obtained upon reaction thereof exhibits a dominant infrared peak at 1640 cm.sup.-1.
An ashless dispersant having in its chemical structure at least one aliphatic hydrocarbyl substituent derived from a liquid, linear polymer of propylene, said polymer having stereo-irregularity and optionally containing up to 25 mol percent of ethylene or C.sub.4 to C.sub.10 monoolefin polymerized into the polymer chain, at least 60 mol percent of said polymer having a terminal vinylidene group, said dispersant being a product formed by reacting (i) an alkenyl succinic acylating agent having said substituent thereon and (ii) a basic salt of aminoguanidine wherein the molar ratio of said aminoguanidine to said acylating agent is in the range of about 0.4:1 to about 1.3:1.
Dependencies are inferred from the claim text.