Durable anti-fungal and algae resistant coatings

1 . A liquid, anti-fungal and/or algae resistant composition that forms a clear coating on a substrate post-application comprising:

(a) water a concentration of up to 70 wt % of the composition;

(b) a biocide dispersed within the water present in an effective amount to prevent and/or reduce fungal and or algal growth on the substrate post-application;

(c) a stabilizing agent dispersed within the water; and

(d) a film-forming composition dispersed within the water present in an effective amount to form a clear film on the substrate post-application;

wherein the film-forming composition comprises a polysiloxane-acrylic resin and a polysiloxane-urethane resin, and wherein the polysiloxane-acrylic resin comprises a shell-core configuration in which the polysiloxane is encapsulated by the acrylic.

2 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the composition includes less than 0.01 wt % heavy metal containing components and less than 0.01 wt % fluoro containing components.

3 . The liquid, anti-fungal and/or algae resistant composition of claim 1 , wherein the film-forming agent composition comprises 10 wt % to 45 wt % of the composition.

4 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the biocide comprises encapsulated and non-encapsulated biocides.

5 . The liquid anti-fungal and/or algae resistant composition of claim 4 wherein the encapsulated biocide is configured to release the biocide from the coating on a substrate post-application for 6 months to 5 years.

6 . The liquid anti-fungal and/or algae resistant composition of claim 4 , wherein the encapsulated biocide comprises 0.1 wt % to 2 wt % of the composition.

7 . The liquid anti-fungal and/or algae resistant composition of claim 6 , wherein the non-encapsulated biocide comprises 0.1 wt % to 1 wt % of the composition.

8 . The liquid anti-fungal and/or algae resistant composition of claim 4 , wherein the encapsulated and non-encapsulated biocide comprise at least a carbamate having biocidal activity.

9 . The liquid anti-fungal and/or algae resistant composition of claim 8 , wherein the encapsulated and non-encapsulated biocide comprise at least a butylcarbamate having biocidal activity.

10 . The liquid anti-fungal and/or algae resistant composition of claim 8 , wherein the non-encapsulated biocide further comprises an aromatic biocide.

11 . The liquid anti-fungal and/or algae resistant composition of claim 10 , wherein the aromatic biocide comprises an aromatic urea compound and an aromatic carbamate.

12 . The liquid anti-fungal and/or algae resistant composition of claim 10 , wherein the aromatic biocide comprises 3-(3,4-dichlorophenyl)-1,1-dimethylurea, methyl 1H-benzimidazol-2-ylcarbamate, or any combination thereof.

13 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the stabilizing agent comprises 0.5 wt % to 6 wt % of the composition.

14 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the stabilizing agent comprises an ultraviolet (UV) stabilizing agent.

15 . The liquid anti-fungal and/or algae resistant composition of claim 14 , wherein the UV stabilizing agent comprises a first UV stabilizing agent, a second UV stabilizing agent, or a combination thereof.

16 . The liquid anti-fungal and/or algae resistant composition of claim 15 , wherein the first UV stabilizing agent is a heterocycle.

17 . The liquid anti-fungal and/or algae resistant composition of claim 16 , wherein the first UV stabilizing agent is a triazine compound.

18 . The liquid anti-fungal and/or algae resistant composition of claim 15 , wherein the first UV stabilizing agent comprises 2-[4-[(2-Hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[4-[(2-Hydroxy-3-tridecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, or any combination thereof.

19 . The liquid anti-fungal and/or algae resistant composition of claim 15 , wherein the second UV stabilizing agent comprises an ultraviolet (UV) stabilizing agent that includes a hindered amine and/or heterocyclic.

20 . The liquid anti-fungal and/or algae resistant composition of claim 19 , wherein the second UV stabilizing agent comprises hindered amine light stabilizers (HALS).

21 . The liquid anti-fungal and/or algae resistant composition of claim 19 , wherein the second UV stabilizing agent comprises a derivative of tetramethylpiperidine.

22 . The liquid anti-fungal and/or algae resistant composition of claim 15 , wherein the first and second UV stabilizing agents are present at a ratio ranging from 1:1 to 5:1 relative to one another.

23 . The liquid anti-fungal and/or algae resistant composition of claim 22 , wherein the liquid anti-fungal and/or algae resistant composition includes the biocide and film forming composition at a ratio ranging from 1:3 to 1:60 relative to one another.

24 . The liquid anti-fungal and/or algae resistant composition of claim 23 , wherein the liquid anti-fungal and/or algae resistant composition includes the unencapsulated biocide and the encapsulated biocide at a ratio ranging from 3:1 to 1:7 relative to one another.

25 . The liquid anti-fungal and/or algae resistant composition of claim 24 , wherein the liquid anti-fungal and/or algae resistant composition includes the polysiloxane-acrylic resin and polysiloxane-urethane resin at a ratio ranging from 9:1 to 1.1:1 relative to one another.

26 . A method of coating a substrate comprising:

(a) applying the composition of claim 1 to a substrate; and

(b) after step (a), drying and/or curing the composition to the substrate thereby forming the coated substrate, wherein the substrate is porous or non-porous material and/or the substrate is a non-functionalized substrate, an electrostatically neutral substrate, or a combination thereof.