Controlled release compositions
AssigneeRohm and Haas Company
InventorsDavid Junhui Dai, Gary Lewis Willingham
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Abstract
Solid compositions containing low water solubility 3-isothiazolone compounds and carbon-based adsorbents that do not rapidly release the 3-isothiazolone when added to a locus to be protected are disclosed. In particular, methods of controlling or inhibiting the growth of marine organisms using the controlled release solid compositions in paints and coatings for marine structures is disclosed.
Claims10
A solid composition comprising a 3-isothiazolone compound having low water solubility and a carbon-based adsorbent, wherein the composition provides controlled release of the 3-isothiazolone compound.
A method for controlling the growth of bacteria, fungi, algae and marine fouling organisms comprising introducing to a locus to be protected:
- (a) a carbon-based adsorbent;
- and
- (b) a low water solubility 3-isothiazolone compound as represented by formula I:
- 3
- wherein:
- Y is an unsubstituted or substituted (C7-C18)alkyl group, an unsubstituted or substituted (C7-C18)alkenyl or alkynyl group, an unsubstituted or substituted (C7-C12)cycloalkyl group, an unsubstituted or substituted (C7-C10)aralkyl group, or a substituted (C7-C10)aryl group;
- R and R1 are independently hydrogen, halogen or (C1-C4)alkyl groups;
- or
- R and R1 can be taken together with the C═C double bond of the isothiazolone ring to form an unsubstituted or substituted benzene ring.
Dependencies are inferred from the claim text.