Biocidal composition comprising an isothiazolinone derivative and a substituted urea or halogenated aromatic alkyl sulphoxide or sulphone
AssigneeImperial Chemical Industries PLC
InventorsFraser F. Morpeth, Malcolm Greenhalgh
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Abstract
A composition comprises an isothiazolinone or an isothiazolothione and a substituted urea or a halogen-containing aromatic alkyl sulphoxide or sulphone. The isothiazolinone derivative can be 1,2-benzisothiazolin-3-one. The substituted urea may be 3-(3,4-dichlorophenyl)-1-1-dimethylurea. The sulphoxide or sulphone may be a sulphone derivative such as di-iodomethyl-4-methylphenyl sulphone. A useful composition comprises 1,2-benzisothiazolin-3-one and the specified urea or sulphone derivative. The composition may include other materials including other compounds having anti-microbial properties.
Claims16
A biocidal composition which comprises
- (a) at least one isothiazolinone derivative or at least one isothiazolothione derivative, and at least one compound which is
- (b) at least one substituted urea having the formula ##STR4## or (c) at least one halogen-containing aromatic alkyl sulphoxide or sulphone having the formula
- Ar.sup.1 SO.sub.x R.sup.4
- wherein
- Ar is an aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic or substituted heterocyclic group;
- R.sup.2 is an alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, alkoxy or substituted alkoxy group;
- R.sup.3 is a hydrogen atom or a group as defined for R.sup.2 ;
- Ar.sup.1 is an aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic or substituted heterocyclic group;
- R.sup.4 is an alkyl, substituted alkyl, aryl or substituted aryl group;
- x as a value of one or two;
- and
- at least one of the groups Ar.sup.1 and R.sup.4 contains at least one halogen substituent;
- and
- wherein the composition contains from 1 to 99% by weight of (a) and correspondingly from 99 to 1% by weight of (b) or (c) or mixture of (b) and (c).
The biocidal composition of claim 11 in which component (c) is
- 2,3,5,6-tetrachloro-4-(methylsulphonyl)pyridine;
- 2,3,6-trichloro-4-(methylsulphonyl)pyridine;
- 2,3,5,6-tetrachloro-4-(isopropylsulphonyl)pyridine or
- di-iodomethyl-4-methylphenyl sulphone.
The biocidal composition of claim 15 in which the dinitrile is tetrachloroisophthalonitrile, tetrafluoroisophthalonitrile or tetrachloroterephthalonitrile.
The biocidal composition of claim 15 which comprises 1,2-benzisothiazolin-3-one;
- 3-(3,4-dichlorophenyl)-1,1-dimethylurea;
- di-iodomethyl-4-methylphenyl sulphone and tetrachloroisophthalonitrile.
Dependencies are inferred from the claim text.