(19) |
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(11) |
EP 0 330 522 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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07.02.1990 Bulletin 1990/06 |
(43) |
Date of publication A2: |
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30.08.1989 Bulletin 1989/35 |
(22) |
Date of filing: 27.02.1989 |
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(51) |
International Patent Classification (IPC)4: C10M 161/00, C10M 165/00, C10M 167/00 // (C10M161/00, 129:00, 129:95, 133:52, 135:10, 135:24, 159:16, 143:00, 145:02, 145:26,
145:04, 145:06, 149:00),(C10M165/00, 143:00, 145:02, 145:26, 145:34, 145:36, 149:00) |
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(84) |
Designated Contracting States: |
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AT BE CH DE ES FR GB IT LI NL SE |
(30) |
Priority: |
26.02.1988 US 160690
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(71) |
Applicant: EXXON CHEMICAL PATENTS INC. |
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Florham Park
New Jersey 07932 (US) |
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(72) |
Inventors: |
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- Waddoups, Malcolm
Westfield
New Jersey 07090 (US)
- Emert, Jacob
Brooklyn
New York 11218 (US)
- Colcord, Laura Jean
Maplewood
New Jersey 07040 (US)
- Merchant, Philip
Houston
Texas 77047 (US)
- Pacansky, Thomas John
Houston
Texas 77024 (US)
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(74) |
Representative: Northover, Robert Frank et al |
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Exxon Chemical Limited
Exxon Chemical Technology Centre
PO Box 1 Abingdon
Oxfordshire, OX13 6BB Abingdon
Oxfordshire, OX13 6BB (GB) |
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(54) |
Improved demulsified lubricating oil compositions |
(57) In accordance with one aspect, the present invention is directed to a lubricating
oil additive mixture comprising (A) a lubricating oil dispersant additive comprising
at least one of (1) ashless dispersants and/or (2) polymeric viscosity index improver
dispersants, and (B) a demulsifier additive comprising the reaction product of an
alkylene oxide and an adduct obtained by reacting a bis-epoxide with a polyhydric
alcohol. In a preferred embodiment, the lubricating oil additive mixtures further
comprises (C) a compatibilizer additive for the demulsifier, which comprises a glycol
ester or a hydroxyamide derivative of a carboxylic acid having a total of from 24
to 90 carbon atoms and at least one carboxylic group per molecule, for enhanced solubility,
viz. stability, of the demulsifier in the oil solutions containing such dispersants.