Polyester dispersants, synthesis and use thereof
AssigneeChevron U.S.A. Inc.
InventorWilliam Raymond Ruhe, Jr.
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Abstract
A polyester composition, suitable for use as a dispersant in lubricating oils, is disclosed. The polyester composition is prepared by reacting (a) an acylating agent selected from an aliphatic-substituted succinic acylating agent, an aromatic polycarboxylic acylating agent, and combinations thereof; and (b) a hydroxyalkyl-substituted tertiary amine compound of the following structure: wherein R′ is a C1-24 aliphatic group; R in each of the x (RO), y (RO) and z (RO) groups is independently C2-4 alkylene; x+y is in a range of 2 to 7; and z is in a range of 1 to 5.
Claims16
A polyester composition comprising a reaction product of:
- (a) an acylating agent selected from an aliphatic-substituted succinic acylating agent, an aromatic polycarboxylic acylating agent, and combinations thereof;
- (b) a hydroxyalkyl-substituted tertiary amine compound of the following structure:
- wherein R′ is a C1-24 aliphatic group;
- R in each of the x (RO), y (RO) and z (RO) groups is independently C2-4 alkylene;
- x+y is in a range of 2 to 7;
- and z is in a range of 1 to 5;
- and
- (c) a poly(oxyalkyene) polyol having from 2 to 15 C2-4 alkylene oxide units per molecule.
Dependencies are inferred from the claim text.