US4417992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust control
Assignee: ChampionX LLC
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Filing: 1982-12-13
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Granted: 1983-11-29
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Expires: 2002-12-13
Abstract
Abstract Dust is controlled on roads, in mines, on mineral and tailings piles, surfaces of pulverized coal and mineral piles contained within open transit cars such as coal cars or trucks, and other surfaces containing coal particles, rock dust, clay, soil particles and other finely divided particles subject to dusting by applying thereto a dust inhibiting amount of a liquid dispersion of watery consistency of highly branched water swellable polymer of acrylamide or an acrylamide-acrylic acid copolymer, branched and/or cross-linked with a multifunctional unsaturated monomer containing more than one ethylenically unsaturated group, said cross-linked polyer or copolymer having a three-dimensional structure and being in the form of microgelatinous particles having a particle size not exceeding approximately one micron in an oil containing emulsion form, and having the properties of swelling dramatically in water and binding dust particles upon adsorption from solution.
Inventors
- 👤 Bhupati R. Bhattacharyya
- 👤 William J. Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:53
CPC Classifications
B; B09; B09B; B09B1/00; B09B1/004; B09B3/00; B09B3/20; B09B3/21; B09B3/24; C; C09; C09K; C09K3/00; C09K3/22; E; E21; E21F; E21F5/00; E21F5/16; Y; Y02; Y02W; Y02W30/00; Y02W30/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
143 words
A method of controlling dust on roads, in mines, on mineral and/or tailings piles or impoundments, controlling dust and wind erosion from surfaces of pulverized coal and mineral piles contained within open transit cars such as coal cars or trucks, and on other surfaces containing coal particles, rock dust, clay, soil particles and other finely divided particles subject to dusting, which comprises applying thereto a dust inhibiting amount of a liquid dispersion of watery consistency of a highly branched water swellable polymer of acrylamide or an acrylamide-acrylic acid copolymer, cross-linked with a multifunctional unsaturated monomer containing more than one ethylenically unsaturated group, said cross-linked polymer or copolymer having a three-dimensional structure and being in the form of microgelatinous particles, having an average particle size not exceeding approximately one micron in an oil continuous emulsion form, and having the property of allaying such dust.
Claim 2
Independent Claim
143 words
A method of controlling dust on roads, in mines, on mineral and/or tailings piles or impoundments, controlling dust and wind erosion from surfaces of pulverized coal and mineral piles contained within open transit cars such as coal cars or trucks, and on other surfaces containing coal particles, rock dust, clay, soil particles and other finely divided particles subject to dusting, which comprises applying thereto a dust inhibiting amount of a liquid dispersion of watery consistency of a highly branched water swellable polymer of acrylamide or an acrylamide-acrylic acid copolymer, cross-linked with a multifunctional unsaturated monomer containing more than one ethylenically unsaturated group, said cross-linked polymer or copolymer having a three-dimensional structure and being in the form of microgelatinous particles, having an average particle size not exceeding approximately one micron in an oil continuous emulsion form, and having the property of allaying such dust.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1 in which the highly branched water swellable polymer is a polymer of acrylamide and methylene-bis-acrylamide.
Claim 4
Dependent Claim
48 words
A method as claimed in claim 1 in which the highly branched water swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with the reaction product of allylamine and a copolymer of maleic anhydride and methyl vinyl ether having the chemical structure ##STR6##
Claim 5
Dependent Claim
52 words
A method as claimed in claim 1 in which the highly branched water swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with 2-hydroxy ethyl methacrylate and the reaction product of allylamine and a copolymer of maleic anhydride and methyl vinyl ether having the chemical structure ##STR7##
Claim 6
Dependent Claim
31 words
A method as claimed in claim 1 in which the highly branched water swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with tris-(2-hydroxy-3-allyloxy)propoxy glycerol ether.
Claim 7
Dependent Claim
29 words
A method as claimed in claim 1 in which said liquid dispersion is applied to surfaces of pulverized coal and mineral piles contained within open transit cars or trucks.
Claim 8
Dependent Claim
42 words
A method as claimed in claim 1 in which said liquid dispersion is applied to surfaces of pulverized coal and mineral piles contained within open transit cars or trucks and said highly branched water-swellable polymer is a polymer of acrylamide and methylene-bis-acrylamide.
Claim 9
Dependent Claim
68 words
A method as claimed in claim 1 in which said liquid dispersion is applied to surfaces of pulverized coal and mineral piles contained within open transit cars or trucks and said highly branched water-swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with the reaction product of allylamine and a copolymer of maleic anhydride and methyl vinyl ether having the chemical structure ##STR8##
Claim 10
Dependent Claim
72 words
A method as claimed in claim 1 in which said liquid disperson is applied to surfaces of pulverized coal and mineral piles contained within open transit cars or trucks and said highly branched water-swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with 2-hydroxy ethyl methacrylate and the reaction product of allylamine and a copolymer of maleic anhydride and methyl vinyl ether having the chemical structure ##STR9##
Claim 11
Dependent Claim
83 words
A dust control composition comprising a dust inhibiting amount of a liquid dispersion of watery consistency of a highly branched water swellable polymer of acrylamide or an acrylamide-acrylic acid copolymer, cross-linked with a multifunctional unsaturated monomer containing more than one ethylenically unsaturated group, said cross-linked polymer or copolymer having a three-dimensional structure and being in the form of microgelatinous particles having an average particle size not exceeding approximately one micron in an oil continuous emulsion form and having the property of allaying dust.
Claim 12
Dependent Claim
83 words
A dust control composition comprising a dust inhibiting amount of a liquid dispersion of watery consistency of a highly branched water swellable polymer of acrylamide or an acrylamide-acrylic acid copolymer, cross-linked with a multifunctional unsaturated monomer containing more than one ethylenically unsaturated group, said cross-linked polymer or copolymer having a three-dimensional structure and being in the form of microgelatinous particles having an average particle size not exceeding approximately one micron in an oil continuous emulsion form and having the property of allaying dust.
Claim 13
Dependent Claim
24 words
A dust control composition as claimed in claim 10 in which the highly branched water swellable polymer is a polymer of acrylamide and methylene-bis-acrylamide.
Claim 14
Dependent Claim
50 words
A dust control composition as claimed in claim 10 in which the highly branched water swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with the reaction product of allylamine and a copolymer of maleic anhydride and methyl vinyl ether having the chemical structure ##STR10##
Claim 15
Dependent Claim
54 words
A dust control composition as claimed in claim 10 in which the highly branched water swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with 2-hydroxy ethyl methacrylate and the reaction product of allylamine and a copolymer of maleic anhydride and methyl vinyl ether having the chemical structure ##STR11##
Claim 16
Dependent Claim
33 words
A dust control composition as claimed in claim 10 in which the highly branched water swellable polymer is an acrylamide-acrylic acid copolymer having a major proportion of acrylamide, cross-linked with tris-(2-hydroxy-3-allyloxy)propoxy glycerol ether.
References Cited (Backward Citations)
GB1114697A
Cited
US4074039A
Cited
USRE28576E
Cited
USRE28576F1
Cited
US3900611A
Cited
CA1066445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |