US4113642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High viscosity neutral polyester lubricants
Assignee: Henkel AG and Co KGaA
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Filing: 1976-11-11
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Granted: 1978-09-12
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Expires: 1996-11-11
Abstract
Abstract A high viscosity neutral complex polyester lubricant reaction product produced by esterifying a mixture of (a) branched alkanepolyols having 2 to 4 primary hydroxyls and 4 to 10 carbon atoms, (b) polyacids selected from the group consisting of dimeric fatty acids and trimeric fatty acids derived by polymerization of unsaturated fatty acids having 16 to 18 carbon atoms, (c) alkanoic acids having 6 to 16 carbon atoms, The acid number of said polyester being 0.3 or below and the hydroxyl number of said polyester being below 0.5, the proportion of hydroxyl groups esterified by said alkanoic acids being from 50% to 90%. The said complex polyester lubricant having a low pour point, a high viscosity and a high viscosity index.
Inventors
- 👤 Karlheinz Koch
- 👤 Willi Breitzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:50
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/42; C10M2207/00; C10M2207/28; C10M2207/30; C10M2207/302
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
153 words
A high viscosity neutral complex polyester lubricant produced by esterifying a mixture of (a) a branched alkanepolyol having 2 to 4 primary hydroxyls and 4 to 10 carbon atoms, (b) polyacids produced by the dimerization and trimerization of unsaturated fatty acids having 16 to 18 carbon atoms, wherein said polyacids are a mixture containing at least 75% of dimeric fatty acids, and (c) alkanoic acids having 6 to 16 carbon atoms selected from the group consisting of (1) mixtures of saturated fatty acids having 6 to 12 carbon atoms, and (2) alkanoic acids having 12 to 16 carbon atoms and having a branched chain in the α-position to the carboxyl group, in such proportions that the acid number of said polyester is 0.3 or below, the hydroxyl number of said polyester is 0.5 or below, and the proportion of said hydroxyl groups being esterified by said alkanoic acid is from 50% to 90%.
Claim 2
Dependent Claim
153 words
A high viscosity neutral complex polyester lubricant produced by esterifying a mixture of (a) a branched alkanepolyol having 2 to 4 primary hydroxyls and 4 to 10 carbon atoms, (b) polyacids produced by the dimerization and trimerization of unsaturated fatty acids having 16 to 18 carbon atoms, wherein said polyacids are a mixture containing at least 75% of dimeric fatty acids, and (c) alkanoic acids having 6 to 16 carbon atoms selected from the group consisting of (1) mixtures of saturated fatty acids having 6 to 12 carbon atoms, and (2) alkanoic acids having 12 to 16 carbon atoms and having a branched chain in the α-position to the carboxyl group, in such proportions that the acid number of said polyester is 0.3 or below, the hydroxyl number of said polyester is 0.5 or below, and the proportion of said hydroxyl groups being esterified by said alkanoic acid is from 50% to 90%.
Claim 3
Dependent Claim
26 words
The complex polyester lubricant of claim 1 wherein said branched alkanepolyol is a member selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane and pentaerythritol.
Claim 4
Dependent Claim
13 words
The complex polyester lubricant of claim 1 wherein said branched alkanepolyol is trimethylolpropane.
Claim 5
Dependent Claim
37 words
The complex polyester lubricant of claim 1 wherein said alkanoic acid is a mixture of saturated fatty acids having 6 to 12 carbon atoms obtained as a first cut from the distillation of a coconut fatty acid.
Claim 6
Dependent Claim
25 words
The complex polyester lubricant of claim 1 wherein said alkanoic acid is isopalmitic acid obtained by oxidation of 2-hexyl-decanol obtained by Guerbet synthesis of octanol.
Claim 7
Dependent Claim
34 words
In the process of lubricating comprising the step of interposing a layer of a lubricant between moving solid parts, the improvement consisting of using the complex polyester lubricant of claim 1, as said lubricant.
Claim 8
Dependent Claim
17 words
A lubricant composition comprising at least 10% by weight of the complex polyester lubricant of claim 1.
Claim 9
Dependent Claim
38 words
The complex polyester lubricant of claim 1 having a viscosity at 37.8° C of from 113 to 896 centiStokes, a Viscosity Index of from 146 to 170, and a pour point of from -59° C to -20° C.
References Cited (Backward Citations)
US2757139A
Cited
US2950250A
Cited
GB847399A
Cited
US3048542A
Cited
US3047504A
Cited
US3189629A
Cited
US3247111A
Cited
US3429817A
Cited
US3526596A
Cited
US3778454A
Cited
US3923702A
Cited
US4036771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |