COMPOSITIONS AND METHODS FOR REDUCING THE SURFACE TEMPERATURE OF COMPOSITE ARTICLES
A composition includes an infrared reflective additive having one or more infrared reflective colorants and a thermally emissive filler. The infrared reflective additive can be melt processed in a polymeric matrix
1 - 16 . (canceled)
17 . An article comprising:
(a) a wood plastic composite core having a peripheral surface; and
(b) a capstock bonded to at least a portion of the peripheral surface of the wood plastic composite core, wherein the capstock comprises a polymer matrix with an infrared reflective additive blended therein, the infrared reflective additive comprising one or more infrared reflective colorants and a thermally emissive filler, and
wherein the one or more infrared reflective colorants comprise Cr2O3; Fe2O3; NiTiO3; CoTiO3; FeTiO3; a mixed metal oxide containing iron and chromium; a mixed metal oxide containing tin, titanium, and zinc; or any combination thereof.
18 . The article according to claim 17 , wherein the capstock further comprises one or more infrared transparent colorants.
19 . The article according to claim 18 , wherein one of the one or more infrared transparent colorants is black.
20 . The article according to claim 17 , wherein the thermally emissive filler is boron nitride.
21 . The article according to claim 17 , wherein the polymer matrix comprises a polyethylene, a polypropylene, a polyolefin copolymer, a functionalized polyolefin, a polystyrene, a polystyrene copolymer, a polyacrylate, a polymethacrylate, a polyester, a polyvinylchloride, a fluoropolymer, a polyamide, a polyether imide, a polyphenylene sulfide, a polysulfone, a polyacetal, a polycarbonate, a polyphenylene oxide, a polyurethane, a thermoplastic elastomer, an epoxy, an alkyd, a melamine, a phenolic, a urea, a vinyl ester, or combinations thereof.
22 . The article according to claim 17 , wherein the polymer matrix comprises a crosslinkable polymer.
23 . The article according to claim 17 , wherein the capstock further comprises an organic or inorganic filler.
24 . The article according to claim 17 , wherein the capstock further comprises a white colorant comprising titanium dioxide and/or zirconium dioxide.
25 . The article according to claim 24 , wherein the white colorant comprises titanium dioxide.
26 . The article according to claim 17 , wherein the article is a decking product, a fencing product, a railing product, a roofing product, or a siding product.
27 . The article according to claim 17 , wherein:
the thermally emissive filler is boron nitride; and
the capstock further comprises one or more infrared transparent colorants.
28 . The article according to claim 27 , wherein the polymer matrix comprises a polyethylene, a polypropylene, a polyolefin copolymer, a functionalized polyolefin, a polystyrene, a polystyrene copolymer, a polyacrylate, a polymethacrylate, a polyester, a polyvinylchloride, a fluoropolymer, a polyamide, a polyether imide, a polyphenylene sulfide, a polysulfone, a polyacetal, a polycarbonate, a polyphenylene oxide, a polyurethane, a thermoplastic elastomer, an epoxy, an alkyd, a melamine, a phenolic, a urea, a vinyl ester, or combinations thereof.
29 . The article according to claim 27 , wherein:
one of the one or more infrared transparent colorants is black; and/or
the capstock further comprises a white colorant comprising titanium dioxide and/or zirconium dioxide.
30 . The article according to claim 27 , wherein the capstock further comprises an organic or inorganic filler.
31 . The article according to claim 27 , wherein the article is a decking product, a fencing product, a railing product, a roofing product, or a siding product.
32 . The article according to claim 27 , wherein the capstock further comprises a white colorant comprising titanium dioxide and/or zirconium dioxide.
33 . The article according to claim 32 , wherein the white colorant comprises titanium dioxide.
34 . The article according to claim 33 , wherein the article is a decking product, a fencing product, a railing product, a roofing product, or a siding product.