Biodal Compositions Containing 1,2-Benzisothiazolin-3-One And 1,2-Dibromo-2,4-Dicyanobutane
This invention relates to biocidal compositions in the form of solutions, containing a) 1,2-benzisothiazolin-3-one (formula I) and/or a salt thereof, preferably its alkali metal or ammonium salt, in particular its lithium, sodium or potassium salt; b) 1,2-dibromo-2,4-dicyanobutane (formula (II)); c) at least one solvent which is a mixture of a compound of the formula III with glycerol (formula (III)); wherein R 1 and R 2 are each independently hydrogen or a linear or branched, saturated or unsaturated alkyl group having 1 to 8 carbon atoms, (O-A) is an alkoxy group selected from an ethylenoxy group (EO), propylenoxy group (PO), butylenoxy group and/or phenylethoxy group, x represents a number ranging from 1 to 15 and y represents a number ranging from 0 to 10.
1 . A biocidal composition in the form of a solution, comprising
a) 1,2-benzisothiazolin-3-one
or a salt thereof or a mixture of 1,2-benzisothiazolin-3-one and a salt thereof,
b) 1,2-dibromo-2,4-dicyanobutane
c) at least one solvent which is a mixture of a compound of the formula III with glycerol
R 1 —(O-A) (x+y) -O—R 2 (III)
in which
R 1 and R 2 independently of one another are hydrogen or a straight-chain or branched, saturated or unsaturated alkyl group having 1 to 8 carbon atoms,
(O-A) is an alkoxy group selected from among ethylenoxy group (EO), propylenoxy group (PO), butylenoxy group and/or phenylethoxy group,
x is a number from 1 to 15 and
y is a number from 0 to 10.
2 . The composition as claimed in claim 1 , comprising 1,2-benzisothiazolin-3-one of the formula I or its salt in amounts of from 1% by weight to 30% by weight and 1,2-dibromo-2,4-dicyanobutane of the formula II in amounts of 1% by weight to 40% by weight, in each case based on the total weight of the solution.
3 . The composition as claimed in claim 1 , comprising 1,2-benzisothiazolin-3-one of the formula I or its salt and 1,2-dibromo-2,4-dicyanobutane of the formula II in the weight ratio of 1,2-benzisothiazolin-3-one to 1,2-dibromo-2,4-dicyanobutane in the range of from 1:10 to 10:1.
4 . The composition as claimed in claim 1 , wherein (O-A) (x+y) is a homogenous alkoxy group comprising (x+y)=1 to 25 alkoxy units.
5 . The composition as claimed in claim 1 , in which (O-A) (x+y) is a mixed alkoxy group of the formula —(O-A 1 ) x -(O-A 2 ) y - which can be arranged randomly or blockwise and in which x is a number from 1 to 15 and y is a number from 0 to 10, and (O-A 1 ) is an ethylenoxy unit and (O-A 2 ) is a propylenoxy unit, a butylenoxy unit or a phenylethoxy unit.
6 . The composition as claimed in claim 1 , wherein R 1 is an alkyl group having 1 to 4 carbon atoms.
7 . The composition as claimed in claim 1 , wherein R 2 is an alkyl group having 1 to 4 carbon atoms.
8 . The composition as claimed in claim 1 , in which x is a number from 1 to 10.
9 . The composition as claimed in claim 1 , in which y is a number from 1 to 5.
10 . The composition as claimed in claim 1 , wherein R 1 is hydrogen and R 2 is a straight-chain or branched alkyl group having 1 to 8 carbon atoms, x is a number between 2 and 12 and y is 0.
11 . The composition as claimed in claim 1 , wherein R 1 is hydrogen, R 2 is n-butyl, x is a number from 2 to 6 and y is the number 0.
12 . The composition as claimed in claim 1 , wherein R 1 is hydrogen, R 2 is methyl, x is a number from 2 to 12 and y is zero.
13 . The composition as claimed in claim 1 , wherein R 1 and R 2 are hydrogen.
14 . The composition as claimed in claim 1 , wherein R 1 and R 2 are hydrogen, (O-A) is an ethylenoxy group (EO), x is a number from 1 to 15, and y is zero.
15 . A method of preserving a product composition selected from the group consisting of a paint, a varnish, a polymer emulsion, a cooling lubricant, a metal working auxiliary, a crop protection formulation, a construction chemical, a detergent, a plastic, and an adhesive, said method comprising adding the biocidal composition of claim 1 to said product composition.
16 . The composition of claim 8 , wherein R 1 and R 2 are hydrogen
17 . The composition of claim 9 , wherein R 1 and R 2 are hydrogen
18 . The composition of claim 1 , wherein the salt of 1,2-benzisothiazolin-3-one is an alkali metal or an ammonium salt.
19 . The composition of claim 1 , wherein the salt of 1,2-benzisothiazolin-3-one is a salt selected from the group consisting of lithium, sodium, and potassium.