Phase change material compositions
View Patent ↗A phase change material (PCM) composition comprises a blend of at least one fatty acid ester and at least one ethylene copolymer, wherein the ethylene copolymer comprises at least 28% of an at least one polar comonomer by weight, based on the weight of the ethylene copolymer. A film or sheet comprises or is produced from the PCM composition and the film or sheet can be a single layer or multilayer structure.
1. A composition comprising or produced from a blend of a phase change material (PCM) and at least one ethylene copolymer wherein
the PCM is selected from the group consisting of alkane, fatty acid, fatty alcohol, fatty acid ester, fatty acid amide, salts of fatty acid, and combinations of two or more thereof; and
the ethylene copolymer comprises or is produced from repeat units derived from ethylene and, based on the weight of the ethylene copolymer, from 30 wt % to 60 wt %, of at least one polar comonomer selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, acrylic acid ester, methacrylic acid ester, carbon monoxide, and combinations of two or more thereof.
2. The composition of claim 1 wherein
the PCM is selected from the group consisting of fatty acid, fatty alcohol, fatty acid ester, fatty acid amide, salts of fatty acid, and combinations of two or more thereof; and
the ethylene copolymer is ethylene vinyl acetate copolymer, ethylene/(meth)acrylate copolymers, ethylene/alkyl (meth)acrylate copolymers, ethylene/(meth)acrylic acid copolymers, ethylene/vinyl acetate/CO terpolymer, ethylene/acrylic ester/CO terpolymer, and combinations of two or more thereof.
3. The composition of claim 2 wherein
the PCM is fatty acid or fatty acid derivative; the fatty acid is oleic acid, palmitic acid, linoleic acid, palmitoleic acid, stearic acid, or combinations of two or more thereof; the fatty acid derivative is monoglyceride, diglyceride, or triglyceride, fatty alcohol, fatty amide, or combinations thereof.
4. The composition of claim 3 wherein the PCM is derived from pork tallow, beef tallow, poultry fat, soybean oil, rapeseed oil, peanut oil, vegetable oil, yellow grease, or combinations of two or more thereof.
5. The composition of claim 4 wherein the ethylene copolymer is ethylene vinyl acetate copolymer; and
the composition additionally comprises from 0.01 to 15 weight % of an additive including plasticizer, stabilizer, UV absorber, anti-static agent, dye, pigment, inorganic filler, fire-retardant, lubricant, glass fiber, glass flake, synthetic fiber or pulp, foaming or blowing agent, processing aid, slip additive, antiblock agent, release agent, tackifying resin, or combinations of two or more thereof; and the stabilizer is viscosity stabilizer, hydrolytic stabilizer, or antioxidants.
6. The composition of claim 5 wherein the composition further comprising one or more flame retardant polymer composition, plaster, rock-wool insulation, glass-wool insulation, or foamed polystyrene.
7. A process comprising applying a composition or an article to a substrate wherein the article comprises the composition; the composition is as recited in claim 2 ; and the substrate is particle board, chip board, oriented strand board, plywood paneling, gypsum board, fiber reinforced gypsum board, fiber board, cement board, cementitious wood wool board, calcium silica board, fiber insulation batt or slab, foam insulation slab, nonwoven textile, fiber-reinforced cellulose, paper, cloth, metallic or non-metallic foil, or combinations of two or more thereof.
8. The process of claim 7 wherein the substrate is applied to a building.
9. The process of claim 8 wherein the process applies the composition to the substrate.
10. The process of claim 8 wherein the process applies the article to the substrate.
11. An article comprising or produced from a composition wherein the article is film or sheet; the article is a single layer or multilayer structure; and the composition is as characterized in claim 1 .
12. The article of claim 11 wherein
the PCM is fatty acid or fatty acid derivative; the fatty acid is oleic acid, palmitic acid, linoleic acid, palmitoleic acid, stearic acid, or combinations of two or more thereof; the fatty acid derivative is monoglyceride, diglyceride, or triglyceride, fatty alcohol, fatty amide, or combinations thereof.
13. The composition of claim 12 wherein the PCM is derived from pork tallow, beef tallow, poultry fat, soybean oil, rapeseed oil, peanut oil, vegetable oil, yellow grease, or combinations of two or more thereof.
14. The article of claim 13 wherein the ethylene copolymer is ethylene vinyl acetate copolymer.
15. The article of claim 11 wherein
the article is a multilayer structure comprising a first layer and a second layer;
the first layer comprises or is produced from the composition;
the PCM is fatty acid or fatty acid derivative; the fatty acid is oleic acid, palmitic acid, linoleic acid, palmitoleic acid, stearic acid, or combinations of two or more thereof; the fatty acid derivative is monoglyceride, diglyceride, or triglyceride, fatty alcohol, fatty amide, or combinations thereof;
the ethylene copolymer comprises from 30 wt % to 60 wt % of the polar comonomer; and
the second layer is a metal layer or a metallized film layer.
16. The article of claim 15 wherein the first layer is in direct contact with the second layer.
17. The article of claim 16 further comprising a substrate having coated, laminated, adhered, or applied thereon the article; and the substrate is particle board, chip board, oriented strand board, plywood paneling, gypsum board, fiber reinforced gypsum board, fiber board, cement board, cementitious wood wool board, calcium silica board, fiber insulation batt or slab, foam insulation slab, nonwoven textile, fiber-reinforced cellulose, paper, cloth, metallic or non-metallic foil, or combinations of two or more thereof.
18. The article of claim 16 further comprising at least one retardant polymer composition, plaster, rock-wool insulation, glass-wool insulation or foamed polystyrene.
19. The article of claim 15 wherein the metal is aluminum and the film of the metallized layer is polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polypropylene, polyethylene, oriented polypropylene, oriented polyethylene terephthalate, paper, or paperboard.
20. The article of claim 11 further comprising a substrate having coated, laminated, adhered, or applied thereon the composition; and the substrate is particle board, chip board, oriented strand board, plywood paneling, gypsum board, fiber reinforced gypsum board, fiber board, cement board, cementitious wood wool board, calcium silica board, fiber insulation batt or slab, foam insulation slab, nonwoven textile, fiber-reinforced cellulose, paper, cloth, metallic or non-metallic foil, or combinations of two or more thereof.