Durable anti-fungal and algae resistant coatings
A liquid anti-fungal and/or algae resistant composition that forms a clear coating on a substrate post-application in which the composition includes less than 0.01 wt % heavy metal containing components and less than 0.01 wt % fluoro containing components.
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 liquid anti-fungal and/or algae-resistant composition include the biocide and the stabilizing agent at a ratio ranging from 8:1 to 1:4, relative to one another; and
wherein the biocide comprises encapsulated and non-encapsulated biocides.
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 composition is an organic, inorganic hybrid resin.
4 . The liquid anti-fungal and/or algae resistant composition of claim 3 , wherein an organic, inorganic hybrid film forming composition comprises 10 wt % to 45 wt %.
5 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the film forming composition comprises a siloxane component and organic component.
6 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the film forming composition comprises a polysiloxane-acrylic resin and polysiloxane-urethane resin.
7 . The liquid anti-fungal and/or algae resistant composition of claim 6 , wherein the polysiloxane-acrylic resin comprises a shell-core configuration in which the polysiloxane is encapsulated by the acrylic.
8 . The liquid anti-fungal and/or algae resistant composition of claim 1 wherein the encapsulated biocide is configured to release the biocide from the coating on a substrate post-application for 6 months to 5 years.
9 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the encapsulated biocide comprises 0.1 wt % to 2 wt % of the composition.
10 . The liquid anti-fungal and/or algae resistant composition of claim 9 , wherein the non-encapsulated biocide comprises 0.1 wt % to 1 wt % of the composition.
11 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the encapsulated and non-encapsulated biocide comprise at least a carbamate having biocidal activity.
12 . The liquid anti-fungal and/or algae resistant composition of claim 11 , wherein the encapsulated and non-encapsulated biocide comprise at least a butylcarbamate having biocidal activity.
13 . The liquid anti-fungal and/or algae resistant composition of claim 11 , wherein the non-encapsulated biocide further comprises an aromatic biocide.
14 . The liquid anti-fungal and/or algae resistant composition of claim 13 , wherein the aromatic biocide comprises an aromatic urea compound and an aromatic carbamate.
15 . The liquid anti-fungal and/or algae resistant composition of claim 13 , wherein the aromatic biocide comprises 3-(3,4-dichlorophenyl)-1,1-dimethylurea, methyl 1H-benzimidazol-2-ylcarbamate, or any combination thereof.
16 . 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.
17 . The liquid anti-fungal and/or algae resistant composition of claim 1 , wherein the stabilizing agent comprises an ultraviolet (UV) stabilizing agent.
18 . The liquid anti-fungal and/or algae resistant composition of claim 17 , wherein the UV stabilizing agent comprises a first UV stabilizing agent, a second UV stabilizing agent, or a combination thereof.
19 . The liquid anti-fungal and/or algae resistant composition of claim 18 , wherein the first UV stabilizing agent is a heterocycle.
20 . The liquid anti-fungal and/or algae resistant composition of claim 19 , wherein the first UV stabilizing agent is a triazine compound.
21 . The liquid anti-fungal and/or algae resistant composition of claim 18 , 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.
22 . The liquid anti-fungal and/or algae resistant composition of claim 18 , wherein the second UV stabilizing agent comprises an ultraviolet (UV) stabilizing agent that includes a hindered amine and/or heterocyclic.
23 . The liquid anti-fungal and/or algae resistant composition of claim 22 , wherein the second UV stabilizing agent comprises hindered amine light stabilizers (HALS).
24 . The liquid anti-fungal and/or algae resistant composition of claim 22 , wherein the second UV stabilizing agent comprises a derivative of tetramethylpiperidine.
25 . The liquid anti-fungal and/or algae resistant composition of claim 18 , wherein the first and second UV stabilizing agents are present at a ratio ranging from 1:1 to 5:1 relative to one another.
26 . The liquid anti-fungal and/or algae resistant composition of claim 25 , 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.
27 . The liquid anti-fungal and/or algae resistant composition of claim 26 , 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.
28 . The liquid anti-fungal and/or algae resistant composition of claim 27 , 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.
29 . 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.