US4303537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water based lubricant
Assignee: Dow Silicones Deutschland GmbH
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Filing: 1979-10-09
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Granted: 1981-12-01
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Expires: 1999-10-09
Abstract
Abstract A stable aqueous dispersion of a solid lubricant combination of MoS 2 and graphite and an acrylic resin is used to coat bearing members to provide an air drying long lasting lubricant coating. A typical formulation is 60 to 80% water, 15 to 30% MoS 2 and graphite in the weight ratio of 1.5:1 to 2.5:1 and 5 to 10% polybutyl acrylate. The MoS 2 and graphite preferably have a particle size of less than 5 μm.
Inventors
- 👤 Werner Laepple
- 👤 Gisela Wienert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/065; C10M2201/066; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/12; C10M2215/00; C10M2215/18; C10M2215/182; C10N; C10N2050/00; C10N2050/015; C10N2050/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A stable aqueous lubricant composition which contains (a) about 60 to 80 percent by weight water, (b) 15 to 30 percent by weight of a combination of molybdenum disulfide, having a particle size in the range of 1 to 5 inclusive and graphite in the weight ratio of 1.5:1 to 2.5:1, (c) 5 to 10 percent of a binder which is a hard, air drying polymer of an alkyl ester of methacrylic or acrylic acid in which the alkyl group contains 1 to 4 carbon atoms, (a), (b) and (c) combined giving 100 percent by weight, (d) about 0.1 to 2 percent by weight of a dispersing and/or wetting agent, and (e) about 0.1 to 1 percent by weight of a water soluble thickening agent, the weights of (d) and (e) both being based on the total weight of (a), (b) and (c).
Claim 2
Dependent Claim
143 words
A stable aqueous lubricant composition which contains (a) about 60 to 80 percent by weight water, (b) 15 to 30 percent by weight of a combination of molybdenum disulfide, having a particle size in the range of 1 to 5 inclusive and graphite in the weight ratio of 1.5:1 to 2.5:1, (c) 5 to 10 percent of a binder which is a hard, air drying polymer of an alkyl ester of methacrylic or acrylic acid in which the alkyl group contains 1 to 4 carbon atoms, (a), (b) and (c) combined giving 100 percent by weight, (d) about 0.1 to 2 percent by weight of a dispersing and/or wetting agent, and (e) about 0.1 to 1 percent by weight of a water soluble thickening agent, the weights of (d) and (e) both being based on the total weight of (a), (b) and (c).
Claim 3
Dependent Claim
27 words
A composition of claim 1 in which (c) is polybutylacrylate, (d) is the ammonium salt of a low molecular weight polyacrylic acid and (e) is a polysaccharide.
Claim 4
Dependent Claim
19 words
The composition of claim 1 in which the molybdenum disulfide and graphite are in the weight ratio of 2:1.
Claim 5
Dependent Claim
27 words
The composition of claim 3 in which (c) is polybutylacrylate, (d) is the ammonium salt of a low molecular weight polyacrylic acid and (e) is a polysaccharide.
Claim 6
Dependent Claim
32 words
The composition of claims 1, 2, 3 or 4 in which the water is present in amount of 35 to 45 percent by weight based on the total weight of the composition.
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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |