Patent US3900611A successfully refreshed from Google Patents.
US3900611A
Expired / Lapsed
US
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Particulate matter suppression using a solution of a surfactant and a polymer
Assignee: Hemlab AG
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Filing: 1973-03-09
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Granted: 1975-08-19
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Expires: 1993-03-09
Abstract
Abstract A method for suppression of particulate matter utilizing an aqueous solution containing a non-irritant surfactant and a polymer. The surfactant is either an amphoteric surfactant alone or in combination with an anionic surfactant. The polymer is preferably selected from the group consisting of polyacrylamide polyacrylamide and hydrolysed quaternised polyacrylamide. The solution is applied to prevent dust and particulate matter from becoming airborne.
Inventors
- 👤 Dennis Thomas Corbett
- 👤 John Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:57
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
117 words
A METHOD OF PREVENTING THE MOVEMENT OF PARTICULATE MATTER WHICH COMPRISES APPLYING TO THE PARTICULATE MATTER AN AMOUNT SUFFICIENT TO CONSOLIDATE THE PARTICULATE MATTER INTO A COMPACT MASS ADHERENT TO A SELECTED SUBSTRATE, OF AN AQUEOUS SOLUTION WHICH IS NON-IRRITAING TO HUMANS, WHICH SOLUTION COMPRISES A SURFACTANT SELECTED FROM THE GROUP CONSISTING OF AN AMPHOTERIC SURFACTANT AND AN AMPHOTERIC SURFACTANT IN COMBINATION WITH AN ANIONIC SURFACTANT, AND A HOMO- OR COIMINE OR ETHOXY RESIDUE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 50,000 TO ABOUT 30,000,000, IN A WEIGHT RATIO OF 10:1 TO 70:1 WHEN THE SURFACTANT IS AN AMPHOTERIC SURFACTANT AND 3:1 TO 7:1 WHEN THE SURFACTANT IS AN AMPHOTERIC SURFACTANT IN COMBINATION WITH AN ANIONIC SURFACTANT.
Claim 2
Independent Claim
117 words
A METHOD OF PREVENTING THE MOVEMENT OF PARTICULATE MATTER WHICH COMPRISES APPLYING TO THE PARTICULATE MATTER AN AMOUNT SUFFICIENT TO CONSOLIDATE THE PARTICULATE MATTER INTO A COMPACT MASS ADHERENT TO A SELECTED SUBSTRATE, OF AN AQUEOUS SOLUTION WHICH IS NON-IRRITAING TO HUMANS, WHICH SOLUTION COMPRISES A SURFACTANT SELECTED FROM THE GROUP CONSISTING OF AN AMPHOTERIC SURFACTANT AND AN AMPHOTERIC SURFACTANT IN COMBINATION WITH AN ANIONIC SURFACTANT, AND A HOMO- OR COIMINE OR ETHOXY RESIDUE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 50,000 TO ABOUT 30,000,000, IN A WEIGHT RATIO OF 10:1 TO 70:1 WHEN THE SURFACTANT IS AN AMPHOTERIC SURFACTANT AND 3:1 TO 7:1 WHEN THE SURFACTANT IS AN AMPHOTERIC SURFACTANT IN COMBINATION WITH AN ANIONIC SURFACTANT.
Claim 3
Dependent Claim
17 words
A method according to claim 1 which further comprises pre-wetting the particulate matter and substrate with water.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein the homo- or co-polymer has a molecular weight of from about 100,000 to 20 million.
Claim 5
Dependent Claim
24 words
A method according to claim 3 wherein the homo- or co-polymer has a molecular weight of from about 1 million to about 15 million.
Claim 6
Dependent Claim
18 words
A method according to claim 1 wherein the homo- or co-polymer is polyacrylamide, hydrolyzed polyacrylamide or quaternized polyacrylamide.
Claim 7
Dependent Claim
13 words
A method according to claim 1 wherein the surfactant is an amphoteric surfactant.
Claim 8
Dependent Claim
14 words
A method according to claim 6 wherein the amphoteric surfactant is of the formula
Claim 9
Dependent Claim
19 words
A method according to claim 1 wherein the surfactant is an amphoteric surfactant in combination with an anionic surfactant.
Claim 10
Dependent Claim
14 words
A method according to claim 8 wherein the amphoteric surfactant is of the formula
Claim 11
Dependent Claim
38 words
A method according to claim 1 wherein said solution comprises about 1 to about 99 percent by weight of the surfactant, about 0.1 to about 10 percent by weight of the homo- or co-polymer and the balance water.
Claim 12
Dependent Claim
29 words
A method according to claim 10 wherein said solution additionally contains 0.01 to 10 percent by weight of an ionic material capable of reducing the viscosity of the solution.
Claim 13
Dependent Claim
18 words
A method according to claim 11 wherein the ionic material is sodium carbonate, sodium tetraborate or trisodium phosphate.
Claim 14
Dependent Claim
73 words
A method according to claim 1 wherein the surfactant is a sulphonated amphoteric surfactant, a carboxylated amphoteric surfactant, a dicarboxylated amphoteric surfactant, a combination of a carboxylated amphoteric surfactant and a sulpho-succinic acid ester, or a combination of a sulphonated amphoteric surfactant and a sulpho-succinic acid ester, and the homo- or co-polymer is partially hydrolyzed polyacrylamide, partially quaternized polyacrylamide, polyacrylate, a partially hydrolyzed acrylamide/acrylate copolymer or a methacrylamide/acrylamide propylbenzyl dimethyl ammonium chloride copolymer.
Claim 15
Dependent Claim
16 words
A method according to claim 11 wherein the ionic material is trisodium ortho-phosphate or sodium tetraborate.
Claim 16
Dependent Claim
41 words
A method according to claim 1 wherein the surfactant is an amphoteric surfactant, the homo- or co-polymer is partially hydrolyzed polyacrylamide Having a molecular weight of 15 million and the weight ratio of amphoteric surfactant to partially hydrolyzed polyacrylamide is 15:1.
Claim 17
Dependent Claim
52 words
A method according to claim 1 wherein the surfactant is a carboxylated amphoteric surfactant, the homo- or co-polymer is partially quaternized polyacrylamide having a molecular weight of 5 million and the solution further contains trisodium ortho-phosphate, and the weight ratio of amphoteric surfactant to partially quaternized polyacrylamide to trisodium orthophosphate is 18:1:1.
Claim 18
Dependent Claim
45 words
A method according to claim 15 wherein the surfactant is a dicarboxylated amphoteric surfactant of 65 percent activity, the homo- or co-polymer is partially hydrolyzed acrylamide/acrylate copolymer having a molecular weight of 8 million and the weight ratio of amphoteric surfactant to copolymer is 99:1.
Claim 19
Dependent Claim
55 words
A method according to claim 1 wherein the surfactant is a combination of a carboxylated amphoteric surfactant and a sulpho-succinic acid ester in a weight ratio of 1:3, the homo- or co-polymer is partially quaternized polyacrylamide having a molecular weight of 2 million and the weight ratio of surfactant to partially quaternized polyacrylamide is 40:3.
Claim 20
Dependent Claim
60 words
A method according to claim 1 wherein the surfactant is a carboxylated amphoteric surfactant in combination with a sulpho-succinic acid ester in a weight ratio of 1:4, the homo- or co-polymer is polyacrylate having a molecular weight of 4 million, the solution also contains sodium tetraborate, and the weight ratio of surfactant to polyacrylate to sodium tetraborate is 75: 4:25.
Claim 21
Dependent Claim
48 words
A method according to claim 1 wherein the surfactant is a sulphonated amphoteric surfactant in combination with a sulpho-succinic acid ester in a weight ratio of 5:1, the homo- or co-polymer is methacrylamide/acrylamide propylbenzyl dimethyl ammonium chloride copolymer and the weight ratio of surfactant to copolymer is 30:1.
References Cited (Backward Citations)
US3147136A
Cited
US3418157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |