3-Isothiazolones

Claim 2

A coating composition with or without a pigment which comprises a film-forming agent, a solvent or carrier, and a compound of the formula ##STR14## wherein Y is an unsubstituted or substituted alkyl, alkenyl, or alkynyl group of 1 to 18 carbon atoms, an unsubstituted or substituted cycloalkyl group having a 3 to 6 carbon atom ring and up to 12 carbon atoms, an unsubstituted or substituted aralkyl group of up to 10 carbon atoms, or an unsubstituted or substituted aryl group of up to 10 carbon atoms, R is hydrogen, halogen or a (C 1 -C 4 )alkyl group, and R' is hydrogen, halogen, or a (C 1 -C 4 )alkyl group, or a salt of a compound of the above formula with a strong acid, said compound being present in an amount which is effective to adversely affect the growth of bacteria, fungi, or algae.

Claim 3

The coating composition of claim 1 wherein the film-forming agent is an acrylic emulsion polymer.

Claim 4

The composition of claim 1 in which the film forming agent includes a copolymer of a (C 1 -C 8 )alkyl acrylate with at least one hard comonomer, and up to about 8% by weight of an alpha,beta-ethylenically unsaturated acid; the film forming agent being present in the form of an aqueous latex of the copolymer.

Claim 5

The composition of claim 1 in which the film forming agent includes a copolymer of a (C 1 -C 8 )alkyl acrylate with at least one of the alkyl methacrylate, acrylonitrile, styrene, vinyl toluene, vinyl acetate, and vinyl chloride, and up to about 8% by weight of an alpha,beta-ethylenically unsaturated acid, said agent is in the form of an aqueous latex of the polymer, Y is alkyl, and at least one of R and R' is chlorine.

Claim 6

The composition of claim 1 in which the film forming agent includes a polymer of vinyl acetate, optionally with at least one of a (C 1 -C 8 )alkyl acrylate, an alkyl methacrylate, an olefin, a nitrile, and vinyl chloride and up to 8% by weight of an alpha,beta-ethylenically unsaturated acid, said agent is in the form of an aqueous latex of the polymer, Y is alkyl, and at least one of R and R' is chlorine.

Claim 7

The coating composition of claim 1 in the form of an oil base paint, and in which Y is alkyl, and at least one of R and R' is chlorine.

Claim 8

A method of coating a material comprising the steps of applying a film of the composition of claim 1, 2, 3, 4 or 5 to said material and drying the coating.

Claim 9

The composition of claim 1 wherein Y is (1) an unsubstituted alkyl group of 1 to 18 carbon atoms, (2) a substituted alkyl group having at least one hydrogen atom replaced by hydroxy, halo, cyano, alkylamino, dialkylamino, phenylamino, halophenylamino, carboxy, carbalkoxy, alkoxy, aryloxy, or carbamoxy, wherein the total number of carbon atoms in the substituted alkyl group does not exceed 18, (3) an unsubstituted or halo-substituted alkenyl group of 2 to 18 carbon atoms (4) an unsubstituted or halo-substituted alkynyl group of 2 to 28 carbon atoms, (5) an unsubstituted or alkyl-substituted cycloalkyl group having a 3 to 6 carbon atom ring and up to 12 carbon atoms, (6) an unsubstituted or a halo-, lower alkyl-, or lower alkoxysubstituted aralkyl group wherein the total number of carbon atoms in the aralkyl group does not exceed 10, or (7) an unsubstituted or 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, R is hydrogen, halogen, or a (C 1 -C 4 ) alkyl group, and R' is hydrogen, halogen, or a (C 1 -C 4 ) alkyl group or a salt of a compound of the above formula with a strong acid.