Pyran Dispersants
AssigneeThe Lubrizol Corporation
InventorsRenee A. Eveland, Matthew D. Gieselman, Adam J. Preston, Joanne L. Jones
Life of this patent
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Abstract
The disclosed technology relates to ashless compounds exhibiting neutral pH and having sufficient polarity to act as a dispersant. The disclosed technology additionally relates to the use of the ashless compounds in engine lubricants as dispersants for preventing engine deposit without degrading seals or increasing (i.e. contributing to) corrosion.
Claims20
An ashless compound comprising the reaction product of a long chain ethylenically unsaturated hydrocarbyl group with a non-carboxy-substituted carbonyl compound selected from an aldehyde and a ketone.
The compound of any previous claim, wherein the reaction product comprises a compound of formula 1:
- where:
- R, R1, and R2, independently, can be at least one of (1) a long chain hydrocarbyl group, or (2) H,
- r1 to r7, independently, can be at least one of (1) H, (2) a short chain hydrocarbyl group, (3) an internal ethylenic double bond formed from the interaction with an r from a neighboring carbon atom on the cyclic ether ring, and (4) absent in contribution to an external ethylenic double bond formed from the interaction with an r or R substituent of the same cyclic ether ring carbon atom.
A composition comprising (A) an oil of lubricating viscosity, and (B) a compound as claimed in any previous claim.
Dependencies are inferred from the claim text.