Patent US5036891A successfully refreshed from Google Patents.
Patent EP0277873A1 successfully refreshed from Google Patents.
EP0208560A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Oil-soluble dispersant additives in fuels and lubricating oils
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1986-07-11
•
Granted: —
•
Expires: 2006-07-11
Abstract
Abstract Hydrocarbyl substituted C 4 to C 10 monounsaturated dicerboxylic acid, anhydrides or esters, e.g. polyisobutenyl succinic anhydride, preferably made by reacting polymer of C 2 to C 10 monoolefin, preferably polyisobutylene, having a molecular weight of about 1500 to 5,000, preferably with a C 4 to C 10 monounsaturated acid, anhydride or ester, preferably maleic anhydride, such that there are 1.05 to 1.25 dicarboxylic acid producing moieties per molecule of said olefin polymer used in the reaction mixture. The resulting materials are useful per se as oil additives, or may be further reacted with amines, alcohols, amino alcohols, boric acid, etc. to form dispersants.
Inventors
- 👤 Jacob Emert
- 👤 Robert Dean Lundberg
- 👤 Malcolm Waddoups
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
C; C10; C10M; C10M167/00; C08; C08F; C08F8/00; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/198; C10L1/22; C10L1/221; C10L1/234; C10L1/238; C10L1/2383; C10L1/30; C10L1/301; C10L1/303; C10M129/00; C10M129/86; C10M129/92; C10M129/93; C10M129/95; C10M133/00; C10M133/52; C10M141/00; C10M141/06; C10M141/10; C10M159/00; C10M159/12; C10M159/20; C10M159/22; C10M159/24; C10M163/00; C10M2205/00; C10M2205/02; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/028; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/14; C10M2207/144; C10M2207/146; C10M2207/22; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/34; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2227/00; C10M2227/06; C10M2227/061; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/25; C10N2040/251; C10N2040/252; C10N2040/253; C10N2040/255; C10N2040/28; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
80 words
An oil additive having improved dispersancy and reduced viscosity increasing additive interactions, comprising a hydrocarbyl substituted C 4 to C 10 monounsaturated dicarboxylic acid producing material formed by reacting olefin polymer of C 2 to C 10 monoolefin having a molecular weight of from 1500 to 5,000 and a C 4 to C 10 monounsaturated acid material, wherein there are an average of 1.05 to 1.25 dicarboxylic acid producing moietes per molecule of said olefin polymer used in the reaction.
Claim 2
Dependent Claim
80 words
An oil additive having improved dispersancy and reduced viscosity increasing additive interactions, comprising a hydrocarbyl substituted C 4 to C 10 monounsaturated dicarboxylic acid producing material formed by reacting olefin polymer of C 2 to C 10 monoolefin having a molecular weight of from 1500 to 5,000 and a C 4 to C 10 monounsaturated acid material, wherein there are an average of 1.05 to 1.25 dicarboxylic acid producing moietes per molecule of said olefin polymer used in the reaction.
Claim 3
Dependent Claim
15 words
An oil additive according to claim 1, wherein the monounsaturated acid material is maleic anhydride.
Claim 4
Dependent Claim
25 words
An oil additive according to claim 1 or claim 2, wherein said olefin polymer is a polymer of a C 2 to C 5 olefin.
Claim 5
Dependent Claim
13 words
An oil additive according to claim 3, wherein the olefin polymer is polyisobutylene.
Claim 6
Dependent Claim
23 words
An oil additive according to claim 4, wherein said olefin polymer has a molecular weight in the range of from 1500 to 3,000.
Claim 7
Dependent Claim
26 words
An oil additive according to claim 4 or 5, wherein there are from 1.06 to 1.20 succinic anhydride units per polyisobutylene moiety used in said reaction.
Claim 8
Dependent Claim
52 words
An oil additive comprising a polymer of C 2 to C 10 monoolefin, the polymer having a molecular weight of 1500 to 5,000 and being substituted with a succinic acid, anhydride or ester moiety such that there are from 1.05 to 1.25 molar proportions of succinic moeity per molar proportion of polymer.
Claim 9
Dependent Claim
52 words
An oil additive comprising a polymer of C 2 to C 10 monoolefin, the polymer having a molecular weight of 1500 to 5,000 and being substituted with a succinic acid, anhydride or ester moiety such that there are from 1.05 to 1.25 molar proportions of succinic moeity per molar proportion of polymer.
Claim 10
Dependent Claim
27 words
An oil additive comprising polyiaobutylene of 1500 to 5,000 number average molecular weight substituted with 1.05 to 1.25 moles of succinic anhydride groups per mole of polyisobutylene.
Claim 11
Dependent Claim
27 words
An oil additive comprising polyiaobutylene of 1500 to 5,000 number average molecular weight substituted with 1.05 to 1.25 moles of succinic anhydride groups per mole of polyisobutylene.
Claim 12
Dependent Claim
37 words
An oil additive as claimed in claim 8 in which the polyisobutylene is of 1500 to 3,000 number average molecular weight and is substituted with 1.06 to 1.20 moles of succinic anhydride groups per mole of polyisobutylene.
Claim 13
Dependent Claim
48 words
An oil soluble dispersant useful as an oil additive, comprising the product of a reaction mixture comprising: (a) the oil additive as claimed in any of claims 1 to 9; and (b) a basic reactant selected from the group consisting of amine, alcohol, amino alcohol and mixtures thereof.
Claim 14
Dependent Claim
13 words
An oil soluble dispersant according to claim 10, wherein (b) is an amine.
Claim 15
Dependent Claim
23 words
An oil soluble dispersant according to claim 11, wherein the amine contains 2 to 60 carbon atoms and 1 to 12 nitrogen groups.
Claim 16
Dependent Claim
51 words
An oil soluble dispersant according to claim 12, wherein (b) is a polyalkyleneamine wherein said alkylene groups contain 2 to 6 carbons and said polyalkyleneamine contains about 2 to 8 nitrogen atoms per molecule; and wherein about 0.3 to 2 moles of said amine are reacted per mole of succinic moiety.
Claim 17
Dependent Claim
14 words
An oil soluble dispersant according to claim 13, wherein said amine is a polyethyleneamine.
Claim 18
Dependent Claim
23 words
An oil soluble dispersant according to any of claims 10 to 14 wherein said reaction mixture includes boric acid and dispersant is borated.
Claim 19
Dependent Claim
21 words
An oil soluble dispersant according to claims 15, wherein said reaction product contains from 0.05 to 2.0 wt per cent boron.
Claim 20
Dependent Claim
23 words
An oleaginous composition comprising a fuel or a lubricating oil and an oil additive as claimed in any of claims 1 to 16.
Claim 21
Dependent Claim
28 words
A lubricating oil composition comprising lubricating oil and from 0.01 to 15 weight per cent of an oil additive as claimed in any of claims 1 to 18.
Claim 22
Dependent Claim
21 words
A lubricating oil as claimed in claim 18 which comprises from 0.1 to 10 weight per cent of the oil additive.
Claim 23
Dependent Claim
21 words
A lubricating oil as claimed in claim 19 which comprises from 0.2 to 7 weight per cent of the oil additive.
Claim 24
Dependent Claim
67 words
A crankcase motor oil which comprise a major amount of lubricating oil; from 0.01 to 10 weight per cent of an additive as claimed in any of claims 1 to 16 as dispersant and from 0.01 to 10 weight per cent of a metal-containing detergent or anti-rust additive, wherein said dispersant exhibits improved dispersancy while minimizing viscosity increasing additive interactions with said metal-containing detergent or anti-rust additive.
Claim 25
Dependent Claim
22 words
A composition according to claim 21, wherein the dispersant is the reaction product of polyisobutene reacted with maleic anhydride and then polyamine.
Claim 26
Dependent Claim
25 words
A composition according to claim 21 or claim 22, wherein said composition also contains 0.1 to 10 weight per cent of a zinc dihydrocarbyl dithiophosphate.
Claim 27
Dependent Claim
21 words
A composition according to any of claims 21 to 23, wherein said metal-containing detergent is an overbased alkaline earth metal sulfonate.
Claim 28
Dependent Claim
34 words
An additive concentrate comprising 5 to 70 weight per . cent of an oil-soluble dipersant as clamimed in any of claims 10 to 16 and 30 to 95 weight per cent of lubricating oil.
Claim 29
Dependent Claim
23 words
A concentrate according to claim 25, wherein the oil-soluble dispersant is formed by reacting a polyisobutylene with maleic anhydride, and then with polyamine.
Claim 30
Dependent Claim
22 words
A concentrate according to claim 25 or claim 26 which also contains 3 to 50 weight per cent of a metal detergent.
Claim 31
Dependent Claim
21 words
A concentrate according to any of claims 25 to 28, wherein said metal detergent is an overbased alkaline earth metal sulfonate.
Claim 32
Dependent Claim
24 words
A concentrate according to any of claims 25 to 28, which also contains 3 to 40 weight per cent of a zinc dihydrocarbyl dithiophosphate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.