Antifouling paint system

Patent metadata

Field	Value
Publication number	US-9410045-B2
Application number	US-201314435632-A
Country	US
Kind code	B2
Filing date	Oct 31, 2013
Priority date	Nov 6, 2012
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A coated substrate having an epoxy coating. The epoxy coating contains 4,5-dichloro-2-n-octylisothiazolin-3-one.

First claim

The invention claimed is:

1. A coated substrate comprising an epoxy coating, said epoxy coating comprising from 0.5 wt % to 3.5 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one, having a thickness from 40 microns to 320 microns and comprising a cured aromatic epoxy resin which comprises polymerized units of bisphenol A;
wherein the substrate has a second coating layer, wherein said epoxy coating is between the substrate and the second coating layer.

2. The coated substrate of claim 1 in which the second coating layer is a self-polishing coating.

3. The coated substrate of claim 2 in which the second coating layer is a metal acrylate copolymer coating.

4. The coated substrate of claim 3 in which 4,5-dichloro-2-n-octylisothiazolin-3-one is adsorbed on a carbon-based adsorbent or a polymeric resin, or encapsulated.

5. The coated substrate of claim 4 in which the second coating layer has less than 0.5 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one.

6. The coated substrate of claim 1 in which the cured aromatic epoxy resin comprises at least 80 wt % bisphenol A.

7. The coated substrate of claim 6 in which the second coating layer is a self-polishing metal acrylate copolymer coating.

8. The coated substrate of claim 7 in which 4,5-dichloro-2-n-octylisothiazolin-3-one is adsorbed on a carbon-based adsorbent or a polymeric resin, or encapsulated.

9. The coated substrate of claim 8 in which the cured aromatic epoxy resin comprises at least 95 wt % bisphenol A.

10. The coated substrate of claim 9 in which 4,5-dichloro-2-n-octylisothiazolin-3-one is adsorbed on an activated carbon having a surface area of at least 1200 m 2 /g.

11. The coated substrate of claim 10 in which the second coating layer has less than 0.5 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one.

12. The coated substrate of claim 4 in which 4,5-dichloro-2-n-octylisothiazolin-3-one is adsorbed on an activated carbon having a surface area of at least 1200 m 2 /g.

13. The coated substrate of claim 12 in which the epoxy coating epoxy coating comprises from 1 wt % to 2 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one.

14. The coated substrate of claim 11 in which the epoxy coating epoxy coating comprises from 1 wt % to 2 wt % 4,5-dichloro-2-n-octylisothiazolin-3-one.

Assignees

• Rohm & Haas

Inventors

• Ashmore John W
• Laganella David M
• Polanuyer Boris

Classifications

• C09D5/16

  Antifouling paints; Underwater paints · CPC title

• Y10T428/31515

  As intermediate layer · CPC title

• C09D133/064

  containing anhydride, COOH or COOM groups, with M being metal or onium-cation · CPC title

• C08K5/47

  Thiazoles · CPC title

• C09D5/1625 Primary

  organic · CPC title