US4128487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of sodium/potassium silicate-containing coating bath
Assignee: CRS Holdings LLC
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Filing: 1978-01-09
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Granted: 1978-12-05
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Expires: 1998-01-09
Abstract
Abstract A coating bath containing sodium and/or potassium silicate is stabilized and its useful life prolonged by the additions of sodium or potassium hydroxide in amounts at least substantially equal to that required to compensate for the amounts of CO 2 or CO 3 anions introduced into the bath which, in reacting with the hydroxide formed by the hydrolysis of the silicate to form carbonates, upsets the hydrolysis equilibrium leading to further hydrolysis of the silicate. Similarly, a quantity of hydroxide is added to compensate substantially for other reactive species which significantly affect the hydrolysis equilibrium of the silicate.
Inventors
- 👤 William L. Karpen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:12
CPC Classifications
C; C10; C10M; C10M103/00; C10M103/06; C10M111/00; C10M111/04; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/065; C10M2201/066; C10M2201/10; C10M2201/102; C10M2207/00; C10M2207/02; C10M2207/021; C10M2209/00; C10M2209/12; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
The method of stabilizing a coating composition containing an aqueous solution of at least one of sodium and potassium silicate which includes the steps of determining the amount of reactive species introduced into the coating composition during use which are reactive with MOH, M being at least one of sodium and potassium, and then adding to the coating composition an amount of MOH at least substantially equal to the amount thereof required to react stoichiometrically with said amount of reactive species.
Claim 2
Independent Claim
81 words
The method of stabilizing a coating composition containing an aqueous solution of at least one of sodium and potassium silicate which includes the steps of determining the amount of reactive species introduced into the coating composition during use which are reactive with MOH, M being at least one of sodium and potassium, and then adding to the coating composition an amount of MOH at least substantially equal to the amount thereof required to react stoichiometrically with said amount of reactive species.
Claim 3
Dependent Claim
19 words
The method set forth in claim 1 in which said reactive species include CO 2 or CO 3 anions.
Claim 4
Dependent Claim
15 words
The method set forth in claim 1 in which said reactive species include chloride anions.
Claim 5
Dependent Claim
16 words
The method set forth in claim 2 in which said reactive species further include chloride anions.
Claim 6
Independent Claim
81 words
The method of stabilizing a coating composition containing an aqueous solution of at least one of sodium and potassium silicate which includes the steps of determining the amount of CO 2 or CO 3 anions introduced into the coating composition, and adding to the coating composition an amount of MOH at least substantially equal to the amount thereof required to react stoichiometrically with said amount of CO 2 or CO 3 anions, M being at least one of sodium and potassium.
Claim 7
Independent Claim
81 words
The method of stabilizing a coating composition containing an aqueous solution of at least one of sodium and potassium silicate which includes the steps of determining the amount of CO 2 or CO 3 anions introduced into the coating composition, and adding to the coating composition an amount of MOH at least substantially equal to the amount thereof required to react stoichiometrically with said amount of CO 2 or CO 3 anions, M being at least one of sodium and potassium.
Claim 8
Dependent Claim
52 words
The method set forth in claim 5 which includes the steps of determining the amount of chloride anion introduced into the coating composition, and adding to the coating composition a further amount of MOH at least substantially equal to the amount thereof required to react stoichiometrically with said amount of chloride anion.
Claim 9
Dependent Claim
33 words
The method set forth in claim 6 in which said coating composition is a composition for forming a dry lubricating film on metallic workpieces and further contains powdered MoS 2 and hydroxyethyl cellulose.
References Cited (Backward Citations)
US4043924A
Cited
US4088585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |