US4290810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for facilitating transportation of particulate on a conveyor belt in a cold environment
Assignee: Dow Chemical Co
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Filing: 1979-05-04
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Granted: 1981-09-22
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Expires: 1999-05-04
Abstract
Abstract Coal and other particulate can be transported on a conveyor belt exposed to winter weather conditions with reduced slippage of the particulate on the belt surface by periodically treating the belt surface with from about 0.001 to about 0.005 gallons per square foot of belt surface (0.04-0.4 liters/sq. meter) of a composition containing a small amount of a dimethyl polysiloxane with the balance consisting substantially of water soluble components comprising (A) a water soluble polyhydroxy compound or monoalkyl ether thereof, and (B) a water soluble organic nonvolatile compound having at least one hydrophilic group, (A) being different from (B).
Inventors
- 👤 Carl T. Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A composition for treating a belt surface consisting essentially of from about 0.05 to about 2% by weight a dimethyl polysiloxane, with the balance consisting essentially of water soluble components (A) a water soluble polyhydroxy compound or monoalkyl ether thereof, and, per part by weight of (A), (B) from about 0.001 to about 2 parts a water soluble nonvolatile organic compound having at least one hydrophilic group, said compound (B) being different from said compound (A), said composition being substantially free of corrosion inducing metal halide salts and said water soluble components contain less than about 5% of water immiscible liquids.
Claim 2
Dependent Claim
101 words
A composition for treating a belt surface consisting essentially of from about 0.05 to about 2% by weight a dimethyl polysiloxane, with the balance consisting essentially of water soluble components (A) a water soluble polyhydroxy compound or monoalkyl ether thereof, and, per part by weight of (A), (B) from about 0.001 to about 2 parts a water soluble nonvolatile organic compound having at least one hydrophilic group, said compound (B) being different from said compound (A), said composition being substantially free of corrosion inducing metal halide salts and said water soluble components contain less than about 5% of water immiscible liquids.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein (A) consists of at least one alkylene glycol.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the hydrophilic group in (B) is amine, carboxyl, or carboxylate.
Claim 5
Dependent Claim
22 words
The composition of claim 3 wherein (A) consists of a mixture of ethylene glycol and propylene glycol and (B) is sodium acetate.
Claim 6
Dependent Claim
23 words
The composition of claims 1, 2, 3 or 4 wherein the siloxane is of the type having a viscosity of about 100,000 centistokes.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein from about 0.1 to about 1.5 percent by weight of dimethyl polysiloxane is present.
Claim 8
Dependent Claim
25 words
The composition of claim 1 or 2 wherein (B) consists of at least one carboxylic acid comprising up to four carbon atoms or salt thereof.
Claim 9
Dependent Claim
13 words
The composition of claim 7 wherein said carboxylic acid is a monocarboxylic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |