US 5,962,380 AGranted

Fluorocarbon elastomer compatibility improving agent having wear inhibition effect

AssigneeChevron Chemical Company

InventorsPierre Tequi, Jacques Cazin, Andrew W. Ho

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Abstract

The use of an effective amount of a compound as an additive improving the compatibility of a lubricating oil formulation having dispersants containing basic nitrogen atoms, with fluorocarbon elastomer seals. That compound has the formula: ##STR1## wherein R and R.sup.1 are independently alkoxycarbonyl, alkenyloxycarbonyl, aryloxycarbonyl, alkylcarbonyl, alkenylcarbonyl, arylcarbonyl, or arylalkyl, or together form a carbocycle, and R.sup.2 and R.sup.3 are independently sulfurized alkyl, alkoxycarbonylalkyl, arylalkyl, or borated hydroxyalkyl, with the proviso that R, R.sup.1, R.sup.2 and R.sup.3 together contain sufficient carbon atoms to render the compound oil soluble in an oil of lubricating viscosity.

Claims16

Dependent claims

A method for improving the compatibility with fluorocarbon elastomer seals of a lubricating oil formulation comprising dispersants containing basic nitrogen atoms, said method comprising either blending or mixing with said lubricating oil formulation an effective amount of a compound having the formula:

##STR13## wherein R and R.sup.1 are independently:
(a) alkoxycarbonyl having four through thirty carbon atoms,
(b) alkenyloxycarbonyl having eight through thirty carbon atoms,
(c) aryloxycarbonyl having seven through thirty carbon atoms,
(d) alkylcarbonyl having four through thirty carbon atoms,
(e) alkenylcarbonyl having eight through thirty carbon atoms,
(f) arylcarbonyl having seven through thirty carbon atoms,
(g) arylalkyl having eight through thirty carbon atoms, or
R and R.sup.1 together with the carbon atom to which they are joined form:
(h) a saturated or unsaturated carbocycle having five or six carbon atoms optionally substituted with one or two alkyl groups independently having one through thirty carbon atoms, and
R.sup.2 and R.sup.3 are independently:
(i) sulfurized alkyl having three through thirty carbon atoms and at least one sulfur atom,
(j) alkoxycarbonylalkyl wherein the alkoxy moiety has two through five carbon atoms and the alkyl moiety has one through ten carbon atoms;
(k) arylalkyl having seven through thirty carbon atoms, or
(l) borated hydroxyalkyl having two through thirty carbon atoms,
with the proviso that R, R.sup.1, R.sup.2 and R.sup.3 together contain sufficient carbon atoms to render the compound oil soluble in an oil of lubricating viscosity.

13 more elements

A lubricating oil formulation comprising:

(a) a major amount of a base oil of lubricating viscosity;
(b) about from 1 to 20 weight % of at least one ashless dispersant;
(c) from 0 to 20 weight % of at least one detergent;
(d) about from 0.05 to 5 weight % of at least one zinc dithiophosphate;
(e) from 0 to 10 weight % of at least one oxidation inhibitor;
(f) from 0 to 1 weight % of at least one foam inhibitor;
(g) from 0 to 20 weight % of at least one viscosity index improver;
and
(h) about from 0.05 to 5 weight % of at least one fluorocarbon elastomer compatibility improving agent of the formula ##STR14## wherein R and R.sup.1 are independently:
(1) alkoxycarbonyl having four through thirty carbon atoms,
(2) alkenyloxycarbonyl having eight through thirty carbon atoms,
(3) aryloxycarbonyl having seven through thirty carbon atoms,
(4) alkylcarbonyl having four through thirty carbon atoms,
(5) alkenylcarbonyl having eight through thirty carbon atoms,
(6) arylcarbonyl having seven through thirty carbon atoms, or
(7) arylalkyl having eight through thirty carbon atoms,
or R and R.sup.1 together with the carbon atom to which they are joined form:
(8) a saturated or unsaturated carbocycle having five or six carbon atoms optionally substituted with one or two alkyl groups independently having one through thirty carbon atoms, and
R.sup.2 and R.sup.3 are independently:
(9) sulfurized alkyl having three through thirty carbon atoms and at least one sulfur atom,
(10) alkoxycarbonylalkyl wherein the alkoxy moiety has two through five carbon atoms and the alkyl moiety has one through ten carbon atoms;
(11) arylalkyl having seven through thirty carbon atoms, or
(12) borated hydroxyalkyl having two through thirty carbon atoms,
with the proviso that R, R.sup.1, R.sup.2 and R.sup.3 together contain sufficient carbon atoms to render the compound oil soluble in an oil of lubricating viscosity.

21 more elements

A method of producing a lubricating oil composition comprising blending the following components together:

(a) a major amount of a base oil of lubricating viscosity;
(b) about from 1 to 20 weight % of at least one ashless dispersant;
(c) from 0 to 20 weight % of at least one detergent;
(d) about from 0.05 to 5 weight % of at least one zinc dithiophosphate;
(e) from 0 to 10 weight % of at least one oxidation inhibitor;
(f) from 0 to 1 weight % of at least one foam inhibitor;
(g) from 0 to 20 weight % of at least one viscosity index improver;
and
(h) about from 0.05 to 5 weight % of at least one fluorocarbon elastomer compatibility improving agent of the formula ##STR16## wherein R and R.sup.1 are independently:
(1) alkoxycarbonyl having four through thirty carbon atoms,
(2) alkenyloxycarbonyl having eight through thirty carbon atoms,
(3) aryloxycarbonyl having seven through thirty carbon atoms,
(4) alkylcarbonyl having four through thirty carbon atoms,
(5) alkenylcarbonyl having eight through thirty carbon atoms,
(6) arylcarbonyl having seven through thirty carbon atoms, or
(7) arylalkyl having eight through thirty carbon atoms,
or R and R.sup.1 together with the carbon atom to which they are joined form:
(8) a saturated or unsaturated carbocycle having five or six carbon atoms optionally substituted with one or two alkyl groups independently having one through thirty carbon atoms, and
R.sup.2 and R.sup.3 are independently:
(9) sulfurized alkyl having three through thirty carbon atoms and at least one sulfur atom,
(10) alkoxycarbonylalkyl wherein the alkoxy moiety has two through five carbon atoms and the alkyl moiety has one through ten carbon atoms;
(11) arylalkyl having seven through thirty carbon atoms, or
(12) borated hydroxyalkyl having two through thirty carbon atoms,
with the proviso that R, R.sup.1, R.sup.2 and R.sup.3 together contain sufficient carbon atoms to render the compound oil soluble in an oil of lubricating viscosity.

21 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/895,291Filed 16 Jul 1997 · continuation in part
Priority: 5 Jun 1995
Granted: 5 Oct 1999
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

C10M 135/26
Containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms: containing carboxyl groups; Derivatives thereof
C10M 135/24
Containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms: containing hydroxy groups; Derivatives thereof
C10M 2219/082
Thiols; Sulfides; Polysulfides; Mercaptals: containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
C10M 2219/083
Containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms: dibenzyl sulfide

Family

Serial466,669Parent of this continuation-in-part · filed 5 Jun 1995
Serial676,048Parent of this continuation-in-part · filed 5 Jul 1996
US 5,641,735 AParent of this continuation-in-part · filed 24 Jun 1997
US 5,807,814 AParent of this continuation-in-part
US 5,962,380 AThis patent

From the US filing history. Foreign family members aren’t listed.