Granulated cuprous oxide for antifouling coatings

• US 6,858,658 B2
• Filed: 11/13/2002
• Issued: 02/22/2005
• Est. Priority Date: 11/12/2002
• Status: Expired due to Fees

• Current Assignee: Nordox Industrier As
• Original Assignee: Nordox Industrier As
• Inventors: Tomasgaard, Lars, Ringseth, Jarle, Bergkvist, Anders
• Primary Examiner(s): SANDERS, KRIELLION ANTIONETTE
• Application Number:
  US10/292,438
• Publication Number:
  US 20040091550A1
• Time in Patent Office: 832 Days
• Field of Search: 523/122, 523/177, 524/413, 524/430
• US Class Current: 523/122
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/12 Powders or granules A01N25/26 takes precedence
• CPC Class Codes: A01N 25/24 containing ingredients to enhance the sticking of the active ingredients
• CPC Class Codes: A01N 59/20 Copper
• CPC Class Codes: C09D 5/1618 inorganic

Abstract

The invention relates to granulated copper oxide containing a binding agent which is resistant to organic solvents, a process of preparing the material and the use thereof. This granulated copper oxide is highly suitable as a biocide in antifouling paints.

Claims

1. A granulated copper oxide which is prepared by the granulation of a copper oxide slurry supplied with 0.3 to 8 percent binder which is resistant to organic solvents.

2. The granulated copper oxide of claim 1, wherein one or more organic polymer compounds are used as binders.

3. The granulated copper oxide of claim 2, wherein one or more polymer alcohols are used as binders.

4. The granulated copper oxide of claim 1, wherein polyvinyl alcohol (PVA) and/or polybutyl alcohol (PBA) are used as binders.

5. The granulated copper oxide of claim 1, having a medium particle size (D₅₀) in the range of 10-70 μ

m.

6. The granulated copper oxide of claim 1, having a medium primary particle size (D₅₀) in the range of 0.1-15 μ

m.

7. The granulated copper oxide of claim 1, having a bulk density in the range of 0.5-2,0 g/cm³.

8. The process of preparing a granulated copper oxide according to claim 1, wherein primary particles of copper oxide are granulated together with an organic compound having a molecular weight in the range of 16,000-175,000 gram/mol as a binder.

9. The process of claim 8, wherein polyvinylalcohol (PVA) or polybutylalcohol (PVBA) is used as a binder.

10. The process of claim 8, wherein the granulation is effected in a spray dryer, preferably having a rotating matrix.

11. A process to prevent the deposition of organic material on a construction, comprising applying to a said construction a composition containing the granulated copper oxide of claim 1.

12. A process to prevent the deposition of organic material on a construction, comprising applying to a said construction a paint containing the granulated copper oxide of claim 1.