Microbicidal microemulsion

Claim 1

A microemulsion comprising from 0.1-50% by weight of an isothiazolone having a water solubility of less than 1% by weight of the formula: ##STR5## wherein Y is an unsubstituted alkyl group of 2 to 18 carbon atoms, a substituted alkyl group of 2 to 18 carbon atoms having at least one hydrogen atom replaced by hydroxy, halo, cyano, alkylamino, dialkylamino, phenylamino, halophenylamino, carboxy, carbalkoxy, alkoxy, aryloxy, morpholino, piperidino, pyrrolidonyl, carbamoxy, or isothiazolonyl, wherein the total number of carbon atoms in the substituted alkyl group does not exceed 18, an unsubstituted or halo-substituted alkenyl group of 4 to 18 carbon atoms, unsubstituted or halo-substituted alkynyl group of 4 to 18 carbon atoms, an unsubstituted or alkyl-substituted cycloalkyl group having a four to six carbon atom ring and up to 12 carbon atoms, an unsubstituted or a halo-, lower alkyl-, or lower alkoxy-substituted aralkyl group wherein the total number of carbon atoms in the aralkyl group does not exceed 10; or an unsubstituted or a halo-, nitro-, lower alkyl-, or lower carbalkoxy-, substituted aryl group wherein the total number of carbon atoms in the aryl group does not exceed 10; and R and R 1 are the same or different substituent selected from hydrogen, halogen, or a (C 1 -C 4 ) alkyl group; and from 0.1 to 25% by weight of an anionic surfactant; from 0.1 to 25% by weight of a cosurfactant selected from alkyl alcohols and alkylalkoxylated alcohols; from 0.5 to 50% by weight of a polyoxyethylene/polyoxypropylene block copolymer of the formula: ##STR6## wherein R 3 is lower alkoxy or a radical of the formula HO(CH 2 CH 2 O) n 1 where m 1 is an integer greater than 15 and n 1 is an integer greater than 10; from 10 to 99% by weight of water; and from 0 to 30% by weight of an adjuvant or adjuvants.

Claim 11

A method for preparing a microemulsion of a compound having a water solubility of less than 1% by weight of the formula: ##STR7## wherein Y is an unsubstituted alkyl group of 2 to 18 carbon atoms, a substituted alkyl group of 2 to 18 carbon atoms having at least one hydrogen atom replaced by hydroxy, halo, cyano, alkylamino, dialkylamino, phenylamino, halophenylamino, carboxy, carbalkoxy, alkoxy, aryloxy, morpholino, piperidino, pyrrolidonyl, carbamoxy, or isothiazolonyl, wherein the total number of carbon atoms in the substituted alkyl group does not exceed 18, an unsubstituted or halo-substituted alkenyl group of 4 to 18 carbon atoms, unsubstituted or halo-substituted alkynyl group of 4 to 18 carbon atoms, an unsubstituted or alkyl-substituted cycloalkyl group having a four to six carbon atom ring and up to 12 carbon atoms, an unsubstituted or a halo-, lower alkyl-, or lower alkoxy-substituted aralkyl group wherein the total number of carbon atoms in the aralkyl group does not exceed 10; or an unsubstituted or a halo-, nitro-, lower alkyl-, or lower carbalkoxy-, substituted aryl group wherein the total number of carbon atoms in the aryl group does not exceed 10; and R and R 1 are the same or different substituent selected from hydrogen, halogen, or a (C 1 -C 4 ) alkyl group; and which comprises mixing from 0.1 to 50% parts by weight of the compound with from 0.1 to 25% an anionic surfactant; from 0.1 to 25% a cosurfactant selected from alkyl alcohols or alkylalkoxylated alcohol; from 0.5 to 50% by weight of a polyoxyethylene/polyoxypropylene block copolymer of the formula: ##STR8## wherein R 3 is lower alkoxy or a radical of the formula HO(CH 2 CH 2 O) n 1 where m 1 is an integer greater than 15 and n 1 is an integer greater than 10; from 10 to 99% by weight of water; and from 0 to 30% by weight of an adjuvant or adjuvants.

Claim 12

A method for preparing a microemulsion of a compound having a water solubility of less than 1% by weight of the formula: ##STR7## wherein Y is an unsubstituted alkyl group of 2 to 18 carbon atoms, a substituted alkyl group of 2 to 18 carbon atoms having at least one hydrogen atom replaced by hydroxy, halo, cyano, alkylamino, dialkylamino, phenylamino, halophenylamino, carboxy, carbalkoxy, alkoxy, aryloxy, morpholino, piperidino, pyrrolidonyl, carbamoxy, or isothiazolonyl, wherein the total number of carbon atoms in the substituted alkyl group does not exceed 18, an unsubstituted or halo-substituted alkenyl group of 4 to 18 carbon atoms, unsubstituted or halo-substituted alkynyl group of 4 to 18 carbon atoms, an unsubstituted or alkyl-substituted cycloalkyl group having a four to six carbon atom ring and up to 12 carbon atoms, an unsubstituted or a halo-, lower alkyl-, or lower alkoxy-substituted aralkyl group wherein the total number of carbon atoms in the aralkyl group does not exceed 10; or an unsubstituted or a halo-, nitro-, lower alkyl-, or lower carbalkoxy-, substituted aryl group wherein the total number of carbon atoms in the aryl group does not exceed 10; and R and R 1 are the same or different substituent selected from hydrogen, halogen, or a (C 1 -C 4 ) alkyl group; and which comprises mixing from 0.1 to 50% parts by weight of the compound with from 0.1 to 25% an anionic surfactant; from 0.1 to 25% a cosurfactant selected from alkyl alcohols or alkylalkoxylated alcohol; from 0.5 to 50% by weight of a polyoxyethylene/polyoxypropylene block copolymer of the formula: ##STR8## wherein R 3 is lower alkoxy or a radical of the formula HO(CH 2 CH 2 O) n 1 where m 1 is an integer greater than 15 and n 1 is an integer greater than 10; from 10 to 99% by weight of water; and from 0 to 30% by weight of an adjuvant or adjuvants.

Claim 21

A method for inhibiting the growth of bacteria, fungi, or algae in a locus subject to contamination by bacteria, fungi, or algae, which comprises incorporating onto or into the locus, in an amount which is effective to adversely affect the growth of bacteria, fungi, or algae, the microemulsion of claims 1, 2, 3, 4, 5, 6, 7, 8 or 9.