Claims
- 1. In a method for safening the use of microbiocidal compositions which comprises placing said compositions in a sealed porous membrane article prepared from a hydrophobic material having a thickness of from about 0.5 mil to about 10 mils and having a pore size smaller than the effective particle size of the solid microbiocidal composition contained sealed therein; the particulate solid microbiocidal composition comprising:
- (i) an aqueous solution containing about 0.1 to 70 weight %, based on total weight of said composition, of at least one water-soluble microbiocidal compound blended with and absorbed into;
- (ii) about 99.9 to 30 weight %, based on total weight of said composition, of an inert, finely-divided water-insoluble solid carrier material:
- the improvement wherein the porous membrane is selected from hydrophobic film-forming materials having a solubility parameter less than 12.5.
- 2. The method according to claim 1 wherein said membrane is produced from polyester, polyfluoroolefins, polyamides, polyvinyl chloride, polyethylene, polypropylene, spunbonded polyethylene, spunbonded polypropylene, polyethylene terephthalate, or polycarbonate.
- 3. The method according to claim 2 wherein said membrane is produced from spunbonded polyethylene or spunbonded polypropylene.
- 4. The method according to claim 2 wherein said microbiocide is selected from at least one water-soluble microbiocidally-effective isothiazolone, having a water solubility of greater than 1000 ppm, represented by the formula: ##STR2## wherein Y is an unsubstituted or substituted C.sub.1 -C.sub.18 alkyl group, an unsubstituted or substituted C.sub.2 -C.sub.18 alkenyl or alkynyl group, an unsubstituted or substituted C.sub.3 -C.sub.12 cycloalkyl group, an unsubstituted or substituted aralkyl group of 6-10 carbon atoms, or an unsubstituted or substituted aryl group of 6-10 carbon atoms;
- R is hydrogen, halogen or a C.sub.1 -C.sub.4 alkyl group,
- R' is hydrogen, halogen or a C.sub.1 -C.sub.4 alkyl group; or
- R and R' are taken together with the C.dbd.C bond of the isothiazolone ring to form a substituted or unsubstituted benzene ring;
- or at least one of said isothiazolones stabilized with at least one metal salt used in an amount of about 1-60 weight %, based on weight of 3-isothiazolone and metal salt, said metal salt being represented by the formula:
- (MX.sub.n)
- wherein
- M is a cation of a metal selected from sodium, potassium, calcium, magnesium, copper, iron, zinc, barium, manganese, silver, cobalt and nickel;
- X is an anion selected from chloride, bromide, iodide, sulfate, nitrate, nitrite, acetate, chlorate, perchlorate, bisulfate, bicarbonate, oxalate, maleate, p-toluene-sulfonate, carbonate, and phosphate; and
- n is an integer for which the anion X satisfies the valence of the cation M.
- 5. The method of claim 2 wherein the solid carrier material is selected from silicaceous diatomaceous earth, high water absorption capacity calcium silicate granular material, silicas, clays, charcoal, vermiculite, corn cobs, wood and polymeric matrices.
- 6. The method according to claim 5 wherein said article comprises from about 1 to 35 weight %, based on total weight of composition, of isothiazolone wherein Y is an unsubstituted or substituted C.sub.1 -C.sub.18 alkyl group or C.sub.3 -C.sub.12 cycloalkyl group; R is hydrogen or halogen;
- R' is hydrogen or halogen; or R and R' are taken together with the C.dbd.C bond of the 3-isothiazolone ring to form a substituted or unsubstituted benzene ring; an isothiazolone stabilized with a metal salt or combinations thereof; and from about 99 to 65 weight %, based on total weight of composition, of a solid carrier material selected from silicaceous diatomaceous earth, high water absorption capacity calcium silicate granular material, silicas, and clays.
- 7. The method according to claim 6 wherein said article comprises from about 2 to 25 weight %, based on total weight of composition, of an isothiazolone wherein Y is methyl, R is hydrogen, and R' is chlorine, an isothiazolone stabilized with said metal salt wherein said metal salt is Mg(NO.sub.3).sub.2 or a mixture of Mg(NO.sub.3).sub.2 and MgCl.sub.2 ; or combinations thereof, and from about 98 to 75 weight %, based on total weight of said isothiazolone, of silicaceous diatomaceous earth.
- 8. The method according to claim 7 wherein the article comprises, in combination with said water-soluble isothiazolone, an isothiazolone having a water solubility of about 500 ppm wherein Y is n-octyl or t-octyl and R and R' are each hydrogen, or an aqueous solution of said isothiazolones stabilized with Mg(NO.sub.3).sub.2 or a mixture of Mg(NO.sub.3).sub.2 and MgCl.sub.2, the isothiazolone comprising from about 2 to 25 weight %, based on total weight of the composition; and from about 98 to 75 weight %, based on total weight of said composition, of silicaceous diatomaceous earth and the pore size of the membrane is equal to or less than 6 mil.
- 9. The method according to claim 8 wherein the article comprises from about 2 to 25 weight %, based on total weight of said article, of a mixture of an isothiazolone in an aqueous solution wherein Y is methyl, R is hydrogen and R' is chlorine and Y is methyl, R is hydrogen and R' is hydrogen, or an aqueous solution of said mixture of isothiazolones stabilized with Mg(NO.sub.3).sub.2 or a mixture of Mg(NO.sub.3).sub.2 and MgCl.sub.2 ; and from about 98 to about 75 weight %, based on total weight of said article, of silicaceous diatomaceous earth and the pore size of the membrane is about 5 mils.
Parent Case Info
This is a division of application Ser. No. 518,237 filed July 28, 1983, now U.S. Pat. No. 4,552,752, issued Nov. 12, 1985 which is a continuation-in-part of U.S. Ser. No. 462,242, filed Jan. 31, 1983, now abandoned, which is a continuation-in-part of Ser. No. 422,056 filed Sept. 23, 1982, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
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1104926 |
Jul 1981 |
CAX |
Divisions (1)
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Number |
Date |
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Parent |
518237 |
Jul 1983 |
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Continuation in Parts (2)
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Number |
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462242 |
Jan 1983 |
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Parent |
422056 |
Sep 1982 |
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