US3867295A
Expired / Lapsed
US
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Block copolymers and lubricant compositions containing the same
Assignee: Mobil Oil AS
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Filing: 1973-08-13
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Granted: 1975-02-18
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Expires: 1993-08-13
Abstract
Abstract Block copolymers are prepared by (1) anionic polymerization of an alkyl-substituted styrene, the alkyl group having at least 4 carbon atoms, or a hydrogenated block or random butadiene-styrene copolymer in the presence of an organometal catalyst of the alkali metal series and (2) addition to the reaction product resulting from this polymerization an alkylene oxide in sufficient amount to produce from 1% to about 50% by weight of a second block copolymerized with the first as an AB or BAB copolymer. These copolymers have molecular weights in the range of from about 1,000 to about 300,000 and perform as multifunctional additives in industrial organic compositions, providing such utility as detergency and viscosity index improvement. Copolymers capped with diisocyanate have excellent thermal and oxidative stability.
Inventors
- 👤 Frederick C Schwab
- 👤 Israel J Heilweil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:06
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/06; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C08G65/00; C08G65/02; C08G65/04; C08G65/26; C08G81/00; C08G81/02; C08G81/024; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/146; C10M; C10M143/00; C10M143/10; C10M143/12; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10L1/18; C10L1/192; C10L1/195; C10L1/198; C10L1/1985; C10L1/24; C10L1/2462; C10L1/2468; C10L1/2475; C10L1/2481; C10M2205/00; C10M2205/04; C10M2205/06; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/028; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/10; C10M2215/16; C10M2215/22; C10M2215/221; C10M2215/222; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/046; C10M2221/00; C10M2221/04; C10M2221/041; C10M2221/043; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2223/047; C10N; C10N2010/00; C10N2010/04; C10N2050/00; C10N2050/10; F; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
AN ORGANIC FLUID COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICATING OIL AND A MINOR AMOUNT SUFFICIENT TO PROVIDE VISCOSITY INDEX IMPROVEMENT OR DETERGENT PROPERTIES THERETO OF AN OIL SOLUBLE BLOCK COPOLYMER HAVING WITHIN ITS MOLECULAR STRUCTURE AN OIL SOLUBLE SEGMENT AND A POLAR SEGMENT SAID OIL SOLUBLE SEGMENT HAVING A MOLECULAR WEIGHT OF ABOUT 1,000 TO 300,000 AND SELECTED FROM THE GROUP CONSISTING OF A POLYMERIZED ALKYLSTYRENE HAVING AT LEAST ONE ALKYL GROUP ATTACHED TO THE AROMATIC NUCLEUS OF AT LEAST 3 CARBON ATOMS AND A HYDROGENATED DIENE-STYRENE COPOLYMER AND THE POLAR SEGMENT IS SELECTED FROM THE GROUP CONSISTING OF A POLYMERIZED ALKYLENE OXIDE AND ALKYLENE SULFIDE WHICH POLAR SEGMENT IS FROM 1 PERCENT TO ABOUT 50 PERCENT BY WEIGHT OF THE TOTAL COPOLYMER.
Claim 2
Dependent Claim
125 words
AN ORGANIC FLUID COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICATING OIL AND A MINOR AMOUNT SUFFICIENT TO PROVIDE VISCOSITY INDEX IMPROVEMENT OR DETERGENT PROPERTIES THERETO OF AN OIL SOLUBLE BLOCK COPOLYMER HAVING WITHIN ITS MOLECULAR STRUCTURE AN OIL SOLUBLE SEGMENT AND A POLAR SEGMENT SAID OIL SOLUBLE SEGMENT HAVING A MOLECULAR WEIGHT OF ABOUT 1,000 TO 300,000 AND SELECTED FROM THE GROUP CONSISTING OF A POLYMERIZED ALKYLSTYRENE HAVING AT LEAST ONE ALKYL GROUP ATTACHED TO THE AROMATIC NUCLEUS OF AT LEAST 3 CARBON ATOMS AND A HYDROGENATED DIENE-STYRENE COPOLYMER AND THE POLAR SEGMENT IS SELECTED FROM THE GROUP CONSISTING OF A POLYMERIZED ALKYLENE OXIDE AND ALKYLENE SULFIDE WHICH POLAR SEGMENT IS FROM 1 PERCENT TO ABOUT 50 PERCENT BY WEIGHT OF THE TOTAL COPOLYMER.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the oil soluble segment of the copolymer is a polymerized t-butyl styrene.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the oil soluble segment of the copolymer is a hydrogenated butadiene-styrene copolymer.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the polar segment is polymerized ethylene oxide.
Claim 6
Dependent Claim
31 words
The composition of claim 4 wherein the polar segment contains a terminal group -CH2-CH2-OZ wherein OZ is selected from the group consisting of hydroxy; -OM wherein M is an alkali metal;
Claim 7
Dependent Claim
19 words
The composition of claim 5 wherein Z is derived from toluene diisocyanate in ionic bond with an alkali metal.
Claim 8
Dependent Claim
18 words
The composition of claim 5 wherein M is selected from the group consisting of sodium, lithium and potassium.
Claim 9
Dependent Claim
21 words
The composition of claim 1 wherein the molecular weight of the copolymer is in the range of from 1,000 to 300,000.
Claim 10
Dependent Claim
84 words
An organic fluid composition comprising a major amount of a lubricating oil and a minor amount of the copolymer of claim 10 in admixture with a minor amount sufficient to provide lubricant improving properties to said lubricating oil of a lubricating oil additive selected from the group consisting of an alkali metal and alkaline earth metal sulfonate, an alkali metal and alkaline earth metal phenate, a sulfurized olefin, and an ester, imide and alkali metal and alkaline earth metal salt of an alkenylsuccinic acid.
Claim 11
Dependent Claim
20 words
The composition of claim 1 wherein the copolymer is a hydrogenated butadiene-styrene ethylene oxide block copolymer terminated with toluene diisocyanate.
Claim 12
Dependent Claim
28 words
The composition of claim 1 wherein the copolymer is an AB or BAB copolymer, A being the said oil soluble segment and B being the said polar segment.
Claim 13
Dependent Claim
14 words
The composition of claim 1 wherein the copolymer is terminated by reaction with trimethoxysilane.
References Cited (Backward Citations)
US3404092A
Cited
US3791971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |