Plastisol coating containing reflective pigments, method of preparing coating on a substrate, and products with such coatings
A poly(vinyl chloride) (PVC) based plastisol composition including a poly(vinyl chloride) polymer (homopolymer or copolymer), a plasticizer, and an infrared-reflective pigment is applied in a layer on a substrate and coalesced to produce a PVC layer including an infrared reflective pigment. The layer can be made into a free film and applied to an extruded vinyl or metal sheet to prepare vinyl or metal siding or trim pieces with an outer layer of the PVC including an infrared-reflective pigment.
1 . A plastisol composition, comprising a poly(vinyl chloride) polymer, at least one plasticizer, and an infrared-reflective pigment.
2 . A plastisol composition according to claim 1 , wherein the poly(vinyl chloride) polymer is a poly(vinyl chloride) homopolymer.
3 . A plastisol composition according to claim 1 , wherein the composition comprises at least one plasticizer selected from the group consisting of phthalates, azelates, butyrates, and epoxy plasticizers.
4 . A plastisol composition according to claim 1 , wherein the composition comprises a secondary plasticizer.
5 . A plastisol composition according to claim 1 , wherein the composition comprises 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.
6 . A plastisol composition according to claim 1 , wherein the composition comprises a sufficient amount of the infrared-reflective pigment so that there is essentially no transmittance of light of near infrared wavelength through a coating layer of a desired thickness formed from the plastisol composition.
7 . A film prepared by applying to a substrate a plastisol composition comprising a poly(vinyl chloride) polymer, at least one plasticizer, and an infrared-reflective pigment and coalescing the applied composition to produce the film.
8 . A film according to claim 7 , wherein the film contains a sufficient amount of the infrared-reflective pigment so that there is essentially no transmittance of light of near infrared wavelength through the film.
9 . A film according to claim 7 , wherein the film is from about 1 mil to about 20 mils thick.
10 . A film according to claim 7 , wherein the film is flexible.
11 . An article of architectural siding, comprising an outer coating layer comprising a poly(vinyl chloride) polymer, at least one plasticizer, and an infrared-reflective pigment.
12 . An article of architectural siding according to claim 11 , wherein the coating layer is from about 1 mil to about 20 mils thick.
13 . An article of architectural siding according to claim 11 , wherein the article of architectural siding is a vinyl article.
14 . An article of architectural siding according to claim 11 , wherein the article of architectural siding is an aluminum article.
15 . A method of preparing an article of architectural siding, comprising steps of:
(a) forming a coating layer on a backing material by applying to the backing material a layer of a plastisol composition comprising a poly(vinyl chloride) polymer, at least one plasticizer, and an infrared-reflective pigment and fusing the applied plastisol layer into a coating layer with heat;
(b) removing the coating layer from the backing material and laminating the coating layer to a piece of architectural siding material; and
(c) shaping the piece of laminated architectural siding material into a desired profile.
16 . An article of architectural siding formed according to the method of claim 15 .
17 . An article of architectural siding according to claim 16 , wherein the article of architectural siding is a vinyl article.
18 . An article of architectural siding according to claim 16 , wherein the article of architectural siding is an aluminum article.
19 . A coated article, comprising at least one coating layer comprising a poly(vinyl chloride) polymer, at least one plasticizer, and an infrared-reflective pigment.
20 . An article having thereon a layer of a plasticized poly(vinyl chloride) polymer, the layer further including an infrared reflective pigment.
21 . An article according to claim 21 , wherein the article is a piece of vinyl siding or a trim piece for vinyl siding and the layer is an outer layer from about 2 mils to about 5 mils thick.
22 . A method of protecting a building, comprising applying to the exterior of the building articles of architectural siding having an outer layer of a coating comprising an infrared reflective pigment.
23 . A method according to claim 22 , wherein the coating further comprises a poly(vinyl chloride) polymer and at least one plasticizer.