Controlled release composition containing DCOIT
View Patent ↗A composition containing 4,5-dichloro-2-n-octylisothiazolin-3-one, an activated carbon having a surface area of at least 700 m 2 /g and a cured isocyanate.
1. A composition comprising 4,5-dichloro-2-n-octylisothiazolin-3-one, an activated carbon having a surface area of at least 700 m 2 /g and a cured isocyanate.
2. The composition of claim 1 in which the cured isocyanate is a polyurea.
3. The composition of claim 2 in which the composition comprises particles of activated carbon comprising adsorbed 4,5-dichloro-2-n-octylisothiazolin-3-one and polyurea.
4. The composition of claim 3 which is a marine coating comprising from 0.5 to 8 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one and from 1.5 to 24 wt % activated carbon.
5. The composition of claim 4 in which the activated carbon has a surface area from 800 to 2500 m 2 /g.
6. The composition of claim 5 which the marine coating is a foul release coating.
7. The composition of claim 5 in which the marine coating is a self-polishing coating.
8. The composition of claim 3 in which the polyurea is the reaction product of an aromatic isocyanate prepolymer and water.
9. The composition of claim 8 in which the activated carbon has a surface area from 800 to 2500 m 2 /g.
10. The composition of claim 9 which is a marine coating comprising from 0.5 to 8 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one and from 1.5 to 24 wt % activated carbon.