Controlled release composition containing DCOIT
View Patent ↗A composition containing 4,5-dichloro-2-n-octylisothiazolin-3-one and an activated carbon having a surface area of at least 700 m 2 /g.
1. A composition comprising 4,5-dichloro-2-n-octylisothiazolin-3-one and an activated carbon having a surface area of at least 700 m 2 /g.
2. The composition of claim 1 in which a weight ratio of activated carbon to 4,5-dichloro-2-n-octylisothiazolin-3-one is from 1.5:1 to 10:1.
3. The composition of claim 2 in which the 4,5-dichloro-2-n-octylisothiazolin-3-one and the activated carbon are present in a marine coating.
4. The composition of claim 3 in which the marine coating comprises from 0.5 to 4 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one and from 1.5 to 16 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 7 in which the self-polishing coating is a metal acrylate copolymer coating.
9. The composition of claim 5 in which the weight ratio of activated carbon to 4,5-dichloro-2-n-octylisothiazolin-3-one is from 2:1 to 8:1.
10. The composition of claim 9 in which the marine coating comprises from 1 to 3.5 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one and from 2 to 12 wt % activated carbon.