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US 10,721,931 B2Granted
Stable aqueous dispersions of biocides
AssigneeTroy Technology II, Inc.
InventorsIsmael Colon, Richard S. Valpey, III, W. Brian Smith
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Abstract
An aqueous dispersion containing BIT and IPBC prepared using nonionic and anionic surfactants exhibits both chemical and physical stability and is suitable for use as a single product which is capable of imparting to a coating composition a high level of resistance against attack by a broad spectrum of organisms, including bacteria, fungi and algae, in both the wet-state and dry film-state.
Claims17
A composition useful for providing resistance to microbiological attack in both a wet state and a dry film state in a single dose, wherein the composition is comprised of:
- a) water;
- b) 1% to 12% by weight 1,2-benzisothiazolin-3-one (BIT);
- c) 2% to 50% by weight 3-iodo-2-propynyl butyl carbamate (IPBC), wherein BIT and IPBC are present in amounts effective to provide a weight ratio of BIT:IPBC of from 0.02 to 2;
- d) at least one thickener/suspending agent, in an amount effective to provide the composition with a viscosity of at least 300 centipoise at 25.degree. C.;
- and
- e) surfactants consisting of at least one alkoxylated C2-C8 aliphatic alcohol containing both ethylene oxide and propylene oxide units, at least one sulfonate surfactant, and optionally at least one additional nonionic surfactant that differs from the at least one alkoxylated C2-C8 aliphatic alcohol containing both ethylene oxide and propylene oxide units and the at least one sulfonate surfactant, wherein the surfactants are present in an amount effective to provide the composition in the form of a stable aqueous dispersion.
3 more elements
Dependencies are inferred from the claim text.