Biocidal elastomeric composition combinations and method for dispersing biocides therewith

Claim 2

IN A METHOD OF PREPARING A BIOCIDAL COMPOSITION COMPRISING DISSOLVING FROM 0.02 TO 20 PARTS BY WEIGHT OF AN ORGANIC TOXICANT SELECTED FROM THE CLASS CONSISTING OF ORGANOTIN COMPOUNDS OF THE FORMULA (R3SN)N X WHEREIN N IS NUMBER FROM ONE TO THREE, R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL GROUPS CONTAINING 1-20 CARBON ATOMS AND ARYL GROUPS CONTAINING 6-18 CARBON ATOMS, X IS A SUBSTITUENT RADICAL ATTACHED TO THE METAL ATOM AND IS SELECTED FROM THE CLASS CONSISTING OF SULFIDE, OXIDE, CHLORIDE, BROMIDE, FLUORIDE, CHROMATE, SULFATE, NITRATE, HYDROXIDE, ACETATE, OCTANOATE, LAURATE, DIMETHYL DITHIOCARBAMATE, NAPHTHENATE, PARAVINYL, BENZOATE, ACRYLATE, METHACRYLATE, HYDROXIDE AND METHOXIDE; NITROSALICYLANILIDE COMPOUNDS OF THE FORMULA

Claim 3

The method of claim 1 wherein said elastomer is neoprene.

Claim 4

The method of claim 2 wherein said microballoons are made from materials selected from the class consisting of phenolic resins selected from the class consisting of phenol/formaldehyde resins wherein the phenol portion is selected from the class consisting of phenol, cresol, xylenol, catechol, resorcinol and pyrogallol; methylol-amine resins selected from the class consisting of monomethylol urea, dimethylol urea, N-ethyl-N''-methylol urea, N-butyl-N''-methylol urea, butylated methylol urea, monomethylol ethylene urea, di-methylol ethylene urea, monomethylol melaamine, dimethylol melaamine, trimethylol melaamine, methylol guanamine and methylol diguanamine; carbon; vinylidene chloride; methylmethacrylate; styrene/acrylonitrile copolymer; and siliceous glass.

Claim 5

The method of claim 3 wherein said toxicant material is bis(tri-n-butyl tin) oxide and wherein only about 9.5 parts of said tin oxide are soluble in 100 parts of said neoprene and it is desired to combine from 10 to 100 parts of said oxide with said 100 parts of said neoprene, the improvement comprising first combining said tin oxide with 20 weight percent to 100 weight percent based on the weight of said tin oxide of microballoons said microballoons being characterized as minute spheres 10-60 microns in diameter, with wall thicknesses ranging from 0.5 to about 3 microns and bulk density of about 0.100 to 0.150 g/cc.

Claim 6

A biocidal elastomeric composition designed to provide both long term biocidal action and quick kill biocidal action, said composition comprising a vulcanized elastomeric matrix containing 100 parts by weight of a vulcanized organic elastomer selected from the class consisting of natural rubber, neoprene, nitrile rubber, butyl rubber, styrene/butadiene rubber, and polybutadiene, from 5 to 100 parts by weight of carbon black the proportion of said carbon black in the range given being selected to yield a desired rate of release of said toxicant by said composition to the environment and 0.02 to 20.0 parts of an organic toxicant selected from the class consisting of organotin compounds of the formula (R3Sn)n X wherein n is number from one to three, R is selected from the class consisting of alkyl groups containing 1-20 carbon atoms and aryl groups containing 6-18 carbon atoms, X is a substituent radical attached to the metal atom and is selected from the class consisting of sulfide, oxide, chloride, bromide, fluoride, chromate, sulfate, nitrate, hydroxide, acetate, octanoate, laurate, dimethyl dithiocarbamate, naphthenate, paravinyl, benzoate, acrylate, methacrylate, hydroxide and methoxide; nitrosalicylanilide compounds of the formula

Claim 7

A biocidal elastomeric composition designed to provide both long term biocidal action and quick kill biocidal action, said composition comprising a vulcanized elastomeric matrix containing 100 parts by weight of a vulcanized organic elastomer selected from the class consisting of natural rubber, neoprene, nitrile rubber, butyl rubber, styrene/butadiene rubber, and polybutadiene, from 5 to 100 parts by weight of carbon black the proportion of said carbon black in the range given being selected to yield a desired rate of release of said toxicant by said composition to the environment and 0.02 to 20.0 parts of an organic toxicant selected from the class consisting of organotin compounds of the formula (R3Sn)n X wherein n is number from one to three, R is selected from the class consisting of alkyl groups containing 1-20 carbon atoms and aryl groups containing 6-18 carbon atoms, X is a substituent radical attached to the metal atom and is selected from the class consisting of sulfide, oxide, chloride, bromide, fluoride, chromate, sulfate, nitrate, hydroxide, acetate, octanoate, laurate, dimethyl dithiocarbamate, naphthenate, paravinyl, benzoate, acrylate, methacrylate, hydroxide and methoxide; nitrosalicylanilide compounds of the formula

Claim 8

A composition as defined in claim 5 and further characterized by said organic toxicant being present in an amount equal to the maximum amount of said toxicant which will dissolve in said elastomer plus a further amount of said toxicant equal to 10 to 50 parts by weight per 100 parts by weight of said elastomer.