US4087572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing environmental erosion
Assignee: Dow Chemical Co
•
Filing: 1973-12-26
•
Granted: 1978-05-02
•
Expires: 1993-12-26
Abstract
Abstract The surface of a mass of finely divided particulate matter, e.g. the surface of a coal pile, is treated by applying to the surface a combination of an organic polymer latex and a silicone to provide a water repellant surface.
Inventors
- 👤 Kenneth H. Nimerick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:11
CPC Classifications
E; E21; E21F; E21F5/00; E21F5/02; E21F5/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
59 words
A method for treating the surface of a pile or mass of finely divided particulate matter which comprises: applying to said surface in synergistic combination an amount of a film forming organic polymer sufficient to penetrate said surface to form a water-wettable supporting crust and an amount of a silicone sufficient to form a hydrophobic coating on said crust.
Claim 2
Independent Claim
59 words
A method for treating the surface of a pile or mass of finely divided particulate matter which comprises: applying to said surface in synergistic combination an amount of a film forming organic polymer sufficient to penetrate said surface to form a water-wettable supporting crust and an amount of a silicone sufficient to form a hydrophobic coating on said crust.
Claim 3
Independent Claim
82 words
A method for treating the surface of a mass of finely divided particulate material which comprises sequentially: (a) applying to said surface an amount of a film forming organic polymer sufficient to penetrate the surface of the matter to be protected to form a water-wettable supporting crust, and (b) applying to said surface an amount of a silicone which forms a hydrophobic coating on a substrate sufficient to waterproof the crust, said organic polymer and silicone being provided in a synergistic combination.
Claim 4
Independent Claim
82 words
A method for treating the surface of a mass of finely divided particulate material which comprises sequentially: (a) applying to said surface an amount of a film forming organic polymer sufficient to penetrate the surface of the matter to be protected to form a water-wettable supporting crust, and (b) applying to said surface an amount of a silicone which forms a hydrophobic coating on a substrate sufficient to waterproof the crust, said organic polymer and silicone being provided in a synergistic combination.
Claim 5
Dependent Claim
24 words
The method of claim 2 wherein the initial application of the film forming organic polymer is permitted to cure before the silicone is applied.
Claim 6
Dependent Claim
16 words
The method of claim 3 wherein the film forming organic polymer is applied as a latex.
Claim 7
Dependent Claim
54 words
The method of claim 3 wherein the application density of the film forming organic polymer is from about 0.5 to about 4 pounds of polymer per 100 square feet of surface and the application density of the silicone is from about 0.05 to about 2 pounds of silicone per 100 square feet of surface.
Claim 8
Dependent Claim
22 words
The method of claim 3 wherein a mixture of a silicone and a film forming organic polymer is applied in step (b).
Claim 9
Dependent Claim
33 words
The method of claim 3 wherein a mixture of a film forming organic polymer and a silicone which forms a hydrophobic coating on a substrate is applied to the surface in step (a).
Claim 10
Dependent Claim
42 words
The method of claim 7 wherein the mixture applied in step (a) comprises an aqueous mixture containing a silicone and a film forming organic polymer wherein the weight ratio of polymer to silicone in said mixture ranges from about 12:1 to 1:1.
Claim 11
Independent Claim
113 words
A method for protecting the surface of a pile or mass of finely divided particulate matter from environmental erosion, which comprises sequentially: (a) applying to said surface an aqueous mixture containing a copolymer formed by the interpolymerization of the reactants, by weight, 36.5% styrene, 60% butadiene, 2% acrylic acid, and 1.5% maleic anhydride, and sodium methyl siliconate, said copolymer and said siliconate being present in said aqueous mixture in a weight ratio of from about 12:1 to 1:1, such mixture being applied in a density of from about 0.25 to about 13 pounds of solids per 100 square feet of surface, (a) allowing the applied composition to cure, and (c) repeating step (a).
Claim 12
Independent Claim
113 words
A method for protecting the surface of a pile or mass of finely divided particulate matter from environmental erosion, which comprises sequentially: (a) applying to said surface an aqueous mixture containing a copolymer formed by the interpolymerization of the reactants, by weight, 36.5% styrene, 60% butadiene, 2% acrylic acid, and 1.5% maleic anhydride, and sodium methyl siliconate, said copolymer and said siliconate being present in said aqueous mixture in a weight ratio of from about 12:1 to 1:1, such mixture being applied in a density of from about 0.25 to about 13 pounds of solids per 100 square feet of surface, (a) allowing the applied composition to cure, and (c) repeating step (a).
Claim 13
Independent Claim
127 words
A method of treating a mass of finely divided particulate material to reduce the erosion and water penetration thereof which comprises: (a) applying to the surface of said mass a mixture of latex containing as the solids a copolymer of the interpolymerization of, as percent by weight, 36.5 percent styrene, 60.0 percent butadiene, 2.0 percent acrylic acid, and 1.5 percent maleic anhydride and also in said mixture sodium methyl siliconate, the weight ratio of said copolymer to sodium methyl siliconate in said mixture ranges from about 12:1 to 1:1, (b) curing said applied mixture to form a crust with said surface; and (c) applying to said cured mixture an amount of sodium methyl siliconate which forms a hydrophobic coating on a substrate sufficient to waterproof said crust.
Claim 14
Independent Claim
127 words
A method of treating a mass of finely divided particulate material to reduce the erosion and water penetration thereof which comprises: (a) applying to the surface of said mass a mixture of latex containing as the solids a copolymer of the interpolymerization of, as percent by weight, 36.5 percent styrene, 60.0 percent butadiene, 2.0 percent acrylic acid, and 1.5 percent maleic anhydride and also in said mixture sodium methyl siliconate, the weight ratio of said copolymer to sodium methyl siliconate in said mixture ranges from about 12:1 to 1:1, (b) curing said applied mixture to form a crust with said surface; and (c) applying to said cured mixture an amount of sodium methyl siliconate which forms a hydrophobic coating on a substrate sufficient to waterproof said crust.
Claim 15
Dependent Claim
18 words
The method of claim 10 wherein the mixtures applied contain as an additional additive a freezing point depressant.
Claim 16
Dependent Claim
18 words
The method of claim 10 wherein the mixture containing the film forming organic polymer includes additionally a surfactant.
Claim 17
Dependent Claim
22 words
The method of claim 12 wherein the surfactant is an adduct of one mole of di-sec-butyl phenol and ten moles ethylene oxide.
References Cited (Backward Citations)
US2204781A
Cited
US2507200A
Cited
US2615820A
Cited
US2854347A
Cited
US2810716A
Cited
US3256234A
Cited
US3108441A
Cited
US3583932A
Cited
US3649344A
Cited
US3706589A
Cited
US3734768A
Cited
US3730271A
Cited
US3823024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |