US5051124A
Expired / Lapsed
US
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Microbicidal compositions of dimethylamine-epichlorohydrin amines
Assignee: Buckman Laboratories International Inc
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Filing: 1989-10-24
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Granted: 1991-09-24
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Expires: 2009-10-24
Abstract
Abstract A method of inhibiting the growth and proliferation of microorganisms by the use of a polymeric quaternary ammonium composition is provided. The composition is prepared by reacting dimethylamine and a polyfunctional amine with epichlorohydrin.
Inventors
- 👤 John D. Pera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; C; C02; C02F; C02F1/00; C02F1/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
179 words
A method of inhibiting the growth and proliferation of microorganisms comprising: contacting said microorganisms with an amount of a polymeric quaternary ammonium composition that is effective to inhibit the growth and proliferation of a microorganism, wherein said composition comprises a crosslinked reaction product of dimethylamine, a polyfunctional amine, and epichlorohydrin, said composition containing repeating units of the structures ##STR8## as a cationic portion of said composition, and Br - or Cl - as an anionic portion of said composition; wherein A is a residue obtained after at least bifunctional epoxy reaction from a polyfunctional amine, and wherein the amount of said polyfunctional amine is from about 1 percent up to about 15 percent of the total moles of said dimethylene and said polyfunctional amine, and the amount of said epichlorohydrin is from at least about the equimolar quantity of said amines up to the full functional equivalency of said amines; and wherein the said bromide or chloride ion is present in an amount sufficient to satisfy the anion requirement of the cationic portion of said polymeric quaternary ammonium composition.
Claim 2
Independent Claim
179 words
A method of inhibiting the growth and proliferation of microorganisms comprising: contacting said microorganisms with an amount of a polymeric quaternary ammonium composition that is effective to inhibit the growth and proliferation of a microorganism, wherein said composition comprises a crosslinked reaction product of dimethylamine, a polyfunctional amine, and epichlorohydrin, said composition containing repeating units of the structures ##STR8## as a cationic portion of said composition, and Br - or Cl - as an anionic portion of said composition; wherein A is a residue obtained after at least bifunctional epoxy reaction from a polyfunctional amine, and wherein the amount of said polyfunctional amine is from about 1 percent up to about 15 percent of the total moles of said dimethylene and said polyfunctional amine, and the amount of said epichlorohydrin is from at least about the equimolar quantity of said amines up to the full functional equivalency of said amines; and wherein the said bromide or chloride ion is present in an amount sufficient to satisfy the anion requirement of the cationic portion of said polymeric quaternary ammonium composition.
Claim 3
Dependent Claim
35 words
The method of claim 1, wherein said polyfunctional amine is selected from the group consisting of ammonia, a primary amine, an alkylene diamine of from 2 to 6 carbon atoms, a polypropylenepolyamine and a polyethylenepolyamine.
Claim 4
Dependent Claim
11 words
The method of claim 2, wherein said polyfunctional amine is ammonia.
Claim 5
Dependent Claim
13 words
The method of claim 2, wherein said polyfunctional amine is a primary amine.
Claim 6
Dependent Claim
24 words
The method of claim 4, wherein said primary amine is a lower alkyl amine, said alkyl group containing a maximum of three carbon atoms.
Claim 7
Dependent Claim
12 words
The method of claim 5, wherein said lower alkyl amine is methylamine.
Claim 8
Dependent Claim
13 words
The method of claim 2, wherein the polyfunctional amine is an alkylene diamine.
Claim 9
Dependent Claim
24 words
The method of claim 7, wherein said alkylene diamine is selected from the group consisting of ethylene diamine, propylene diamine, butylene diamine, and dimethylaminopropylamine.
Claim 10
Dependent Claim
12 words
The method of claim 8, wherein said alkylene diamine is ethylene diamine.
Claim 11
Dependent Claim
11 words
The method of claim 8, wherein said alkylene diamine is dimethylaminopropylamine.
Claim 12
Dependent Claim
19 words
The method of claim 2, wherein said polyethylenepolyamine is selected from the group consisting of diethylenetriamine, triethylenetetramine, and tetraethylenepentamine.
Claim 13
Dependent Claim
14 words
The method of claim 1, wherein the microorganisms are present in an aqueous system.
Claim 14
Dependent Claim
24 words
The method of claim 12, wherein the aqueous system is selected from the group consisting of fresh water, cooling water and swimming pool water.
Claim 15
Dependent Claim
25 words
The method of claim 13, wherein the concentration of said composition in said aqueous system is about 0.5 to about 500 parts per million (w/w).
Claim 16
Dependent Claim
12 words
The method of claim 1, wherein said microorganisms comprise a bacterial species.
Claim 17
Dependent Claim
12 words
The method of claim 1, wherein said microorganisms comprise an algal species.
References Cited (Backward Citations)
US3738945A
Cited
USRE28808E
Cited
USRE28807E
Cited
US3894945A
Cited
US3894944A
Cited
US3894946A
Cited
US3894947A
Cited
US3930877A
Cited
US3975347A
Cited
US4140798A
Cited
US4147627A
Cited
US4164521A
Cited
US4111679A
Cited
US4166041A
Cited
US4104161A
Cited
US4606773A
Cited
US4769155A
Cited
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