Imidazolium, pyrazolium and triazolium sailts as swimming pool sanitizers
AssigneeZeneca Limited
InventorsPeter W. Austin, Clive H. Barlow, Brian D. Bothwell, Andrew N. Collins, Mark R. James
Life of this patent
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Abstract
The use of oligomeric imidazolium, pyrazolium and triazolium salts as swimming pool sanitizers having improved compatibility with chlorine. Bisimidazolium salts are preformed.
Claims19
A method for inhibiting the growth of micro-organisms in a bathing facility which comprises adding to the water thereof from 1 to 1000 ppm of a heterocyclic salt of the formula I ##STR21## wherein R and R.sup.1 are independently C.sub.4-20 -alkyl;
- A and B are independently a pyrazolium, triazolium or imidazolium ring;
- X is C.sub.6-18 -alkylene;
- n is 1 to 6;
- and
- Y is one or more anions providing (n+1) negative charges to give a neutral molecule.
A compound having the formula ##STR25## wherein R and R.sup.1 are independently C.sub.4-20 -alkyl;
- X is C.sub.6-18 -alkylene;
- R.sup.2 to R.sup.7 are independently hydrogen or C.sub.1-4 -alkyl provided that at least one of R.sup.2 to R.sup.4 and R.sup.5 and R.sup.7 is C.sub.1-4 -alkyl;
- Y is one or more anions providing two negative charges to give a neutral molecule;
- with the exception of decyl-bis-(1-decyl-2-methyl-imidazolium) dibromide.
A process for making a compound of formula ##STR28##
A compound of formula X ##STR29## wherein R.sup.5 to R.sup.7 are independently hydrogen or C.sub.1-4 -alkyl or R.sup.6 and R.sup.7 together with the carbon atoms to which they are attached form a phenyl ring;
- X.sup.2 is a C.sub.6-18 -alkylene;
- and
- Hal is chlorine, bromine or iodine.
Dependencies are inferred from the claim text.