Aqueous formulation for an antifouling coating system for submerged substrates, method for treating same, and use thereof
The invention relates to a formulation for an antifouling coating system to be applied on submerged substrates. The invention is characterized in that the formulation contains at least 30 wt % of water relative to the total weight thereof, at least 10 wt % relative to the total weight thereof of a dry extract of a waterproofing agent selected from a silicone resin, a polyurethane resin, and/or a styrene acrylic copolymer resin either alone or mixed, and at least 5 wt % relative to the total weight thereof of a dry extract of an active anti-adhesion agent. The invention also relates to a method for processing substrates to be submerged using such a formulation, and to the use of such a formulation as an antifouling agent for deterring the attachment of marine organisms such as algae, shellfish and other crustaceans on any submerged substrate, and in particular ship hulls.
1. A formulation of an antifouling coating system for application to submerged substrates, comprising:
at least 30% by weight of water, relative to the total weight of the formulation,
at least 10% by weight of dry extract, relative to the total weight of the formulation, of a water repellent which is a mixture of a silicone resin, a polyurethane resin and an acrylic-styrene copolymer resin, and
at least 5% by weight of dry extract, relative to the total weight of the formulation, of an anti-adhesive active agent.
2. The formulation according to claim 1 , wherein the silicon resin-based water repellent is a polysiloxane resin, and/or derivatives thereof, alone or in admixture.
3. The formulation according to claim 2 , wherein the silicon resin-based water repellent is a polymethylsiloxane resin in a non-ionic aqueous emulsion.
4. The formulation according to claim 1 , wherein the anti-adhesive active agent is a wax, a grease, or paraffin.
5. The formulation according to claim comprising at least 50% by weight, relative to the total weight, of an aqueous solvent-cosolvent system.
6. The formulation according to claim 5 , comprising at least 20% by weight, relative to the total weight, of a cosolvent selected from hydrocarbons, alcohols, ketones, esters, alone or in combination.
7. The formulation according to claim 1 , further comprising a non-toxic natural agent, adapted to inhibit attachment of algae and other marine organisms and crustaceans, wherein said non-toxic natural agent is composed of bacterial strains, at a concentration of less than 5% by weight relative to the total weight of the formulation.
8. The formulation according to claim 1 , comprising:
Polymethylsiloxane resin
12.26%, or 4.9%
by weight of dry extract
40% in a non-ionic
emulsion
Polyurethane resin 35%
18.62%, or 6.52%
by weight of dry extract
in aqueous emulsion
Acrylic-styrene
5.03% or 2.01%
by weight of dry extract
copolymer resin 40% in
an aqueous emulsion
Water
64.5%
50% paraffin in an
39.88%, or 19.94%
by weight of dry extract
aqueous emulsion,
grade 56/58
Essential oil (lavandin)
0.32%
Sodium acrylate
0.3%
polymer-based surfactant
Silica oxide
0.75%
Polyurethane thickener
0.34%
Acrylic thickener
0.42%
.
9. The formulation according to claim 2 , wherein the anti-adhesive active agent is a wax, a grease, or paraffin.
10. The formulation according to claim 2 , comprising at least 50% by weight, relative to the total weight, of an aqueous solvent-cosolvent system.
11. The formulation according to claim 10 , comprising at least 20% by weight, relative to the total weight, of a cosolvent selected from hydrocarbons, alcohols, ketones, esters, alone or in combination.
12. The formulation according to claim 3 , comprising at least 50% by weight, relative to the total weight, of an aqueous solvent-cosolvent system.
13. The formulation according to claim 12 , comprising at least 20% by weight, relative to the total weight, of a cosolvent selected from hydrocarbons, alcohols, ketones, esters, alone or in combination.
14. The formulation according to claim 9 , comprising at least 50% by weight, relative to the total weight, of an aqueous solvent-cosolvent system.
15. The formulation according to claim 14 , comprising at least 20% by weight, relative to the total weight, of a cosolvent selected from hydrocarbons, alcohols, ketones, esters, alone or in combination.
16. The formulation according to claim 2 , further comprising a non-toxic natural agent, adapted to inhibit attachment of algae and other marine organisms and crustaceans, wherein said non-toxic natural agent is composed of bacterial strains, at a concentration of less than 5% by weight relative to the total weight of the formulation.
17. A method for treating substrates to be submerged into water/marine environment with a formulation according to claim 1 , comprising applying the formulation in the form of at least one layer through spraying, a roller or a brush, to the substrate to be protected against marine fouling, after prior cleaning and drying of the substrate, at an outside temperature of between about 5° and about 50° C., and then drying at room temperature for about 25 minutes to about 40 minutes between two consecutive layers, and between about 30 minutes and about 50 minutes before submersion.
18. Method of deterring the attachment of marine organisms such as algae, shellfish and other crustaceans onto any a submerged substrate, comprising applying the formulation according to claim 1 to the substrate as an antifouling agent.
19. The method according to claim 18 , wherein the substrate is a ship hull.
20. The method according to claim 17 , wherein the outside temperature is between about 5° and about 50° C.
21. The method according to claim 17 , wherein the drying is at a temperature of about 23° C.