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US3897454A
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Polyalkylene glycol polyalkylene polyamine dispersants for lubricant fluids
Assignee: Atlantic Richfield Co
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Filing: 1973-06-11
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Granted: 1975-07-29
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Expires: 1993-06-11
Abstract
Abstract A new class of dispersant compounds and compositions and a series of novel lubricant compositions are disclosed. Polyalkylene glycol succinimides which may be derived from maleic acids and anhydrides are useful as dispersants in, for example, polyglycol base fluids. Lubricating compositions including such dispersant compositions are also described.
Inventors
- 👤 Tad L Hankins
- 👤 Ting-I Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:07
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/416; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G65/33306; C08G65/338; C08K; C08K5/00; C08K5/0008; C08K5/005; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/252; C10N2040/253; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE FOLLOWING STRUCTURES:
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE FOLLOWING STRUCTURES:
Claim 3
Dependent Claim
61 words
contacting said etherified product with a polyalkylene polyamine in an amount from about 0.1 mole to about 3 mole of polyamine per mole of maleic compound contacted in step (1) at conditions sufficient to react at least a portion of said etherified product with said polyamine to form said dispersant composition, said polyalkylene polyamine being selected from the group consisting of
Claim 4
Dependent Claim
61 words
contacting said etherified product with a polyalkylene polyamine in an amount from about 0.1 mole to about 3 mole of polyamine per mole of maleic compound contacted in step (1) at conditions sufficient to react at least a portion of said etherified product with said polyamine to form said dispersant composition, said polyalkylene polyamine being selected from the group consisting of
Claim 5
Dependent Claim
84 words
The compound of claim 1 wherein each R1 and R2 is independently selected from the group consisting of hydrogen and alkyl containing from 1 to about 6 carbon atoms, each R3 and R4 is independently selected from the group consisting of hydrogen and alkyl containing from 1 to about 4 carbon atoms, all R5''s are the same and selected from the group consisting of ethylene and propylene, n is from about 10 to about 100, and n is at least about 3 times m.
Claim 6
Dependent Claim
23 words
The compound of claim 2 wherein R1 and R2 are both hydrogen, all R3''s and R4''s are methyl, and all R5''s are ethylene.
Claim 7
Dependent Claim
23 words
The compound of claim 3 wherein n is from about 10 to about 40 and is about 5 to about 15 times m.
Claim 8
Independent Claim
9 words
A method for making a dispersant composition which comprises:
Claim 9
Independent Claim
9 words
A method for making a dispersant composition which comprises:
Claim 10
Dependent Claim
96 words
The method of claim 5 wherein the contacting of step (1) takes place at pressures in the range from about 0.1 atmosphere to about 50 atmospheres and temperatures in the range from about 25*C. to about 250*C. for a period of time from about 1 hour to about 500 hours, and the contacting of step (2) takes place at pressures in the range from about 0.1 atmosphere to about 50 atmospheres and at temperatures in the range from about 50*C. to about 300*C. for a period of time from about 1 hour to about 100 hours.
Claim 11
Dependent Claim
71 words
The method of claim 6 wherein R1 and R2 are independently selected from the group consisting of hydrogen and alkyl containing from 1 to about 6 carbon atoms, each R3 and R4 is selected from the group consisting of hydrogen and alkyl containing from 1 to about 4 atoms, n is from about 10 to about 100, all R5''s are the same and n is at least about 3 times m.
Claim 12
Dependent Claim
46 words
The method of claim 7 wherein from about 0.5 mole to about 1.5 moles of glycol polymer is present per mole of maleic compound and from about 0.5 mole to about 1.5 moles of polyamine is present per mole of maleic compound contacted in step (1).
Claim 13
Dependent Claim
95 words
The method of claim 8 wherein the contacting of step (1) takes place at pressures in the range from about 1 atmosphere to about 10 atmospheres and temperatures in the range from about 150*C. to about 225*C. for a period of time from about 10 hours to about 200 hours, and the contacting of step (2) takes place at pressures in the range from about 1 atmosphere to about 10 atmospheres and temperatures in the range from about 100*C. to about 225*C. for a period of time from about 10 hours to about 50 hours.
Claim 14
Dependent Claim
41 words
The method of claim 9 wherein R1 and R2 are both hydrogen, all R3''s and R4''s are methyl, all R5''s are ethylene, n is from about 10 to about 40 and n is from about 5 to about 15 times m.
Claim 15
Dependent Claim
20 words
The method of claim 6 wherein steps (1) and (2) take place in the presence of an essentially inert solvent.
Claim 16
Dependent Claim
20 words
The method of claim 10 wherein steps (1) and (2) take place in the presence of an essentially inert solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |