High-weather-resistant protective film for exterior glass or painted surfaces

Abstract

To provide a highly weather-resistant protective film for exterior glass or painted surfaces that has excellent durability and weather resistance, maintains the physical properties of the protective film over a long period of time, has excellent adhesion and bonding with the surface protective layer, and offers excellent workability. [Solution] A highly weather-resistant protective film for exterior glass or painted surfaces, comprising a functional flexible film as a base layer, the functional additive comprising a thermosetting aqueous non-yellowing polyurethane emulsion composition and a functional additive, wherein the functional additive is characterized by comprising one or more of the following: a water-dispersible dye or pigment of 10 nm to 300 nm size for ensuring the transmittance of visible light; a pigment of 10 μm or larger for opacity of visible light; one or more metal oxides from CTO, ATO, ITO, and WO3 having heat-shielding properties; a UV blocker for blocking ultraviolet rays; a UV stabilizer for ensuring stability from ultraviolet rays; and an IR blocker for blocking infrared rays.

Claims

1. A highly weather-resistant protective film for exterior glass or coatings, comprising a functional flexible film as a base layer, comprising a thermosetting aqueous non-yellowing polyurethane emulsion composition and a functional additive, The functional additive comprises a water-dispersible dye or pigment with a size of 10 nm to 300 nm for ensuring the transmittance of visible light, a pigment of 10 μm or larger for opacity of visible light, and CTO, ATO, ITO, and WO for thermal barrier properties. ３ A highly weather-resistant protective film for exterior glass or painted surfaces, characterized by comprising one or more metal oxides, one or more UV blocking agents for blocking ultraviolet rays, one or more UV stabilizers for ensuring stability from ultraviolet rays, and one or more IR blocking agents for blocking infrared rays.

2. The aforementioned thermosetting aqueous non-yellowing polyurethane emulsion composition is a two-component type, The main component comprises 100 parts by weight of polyurethane emulsion, 50 to 69 parts by weight of pentyl acetate, 40 to 59 parts by weight of 1-pentanol, 50 to 70 parts by weight of 3,5-dinitrobenzoyl chloride, and 40 to 60 parts by weight of cyclohexyl 3,5-dinitrobenzoate. The protective film for exterior glass or painted surfaces with high weather resistance according to claim 1, characterized in that the curing agent comprises 100 parts by weight of 2-methyl-1-aziridine propionate, 30 to 50 parts by weight of pentyl magnesium bromide, 20 to 40 parts by weight of triphenylmethanol, and 31 to 40 parts by weight of 2-heptanone.

3. The protective film for exterior glass or painted surfaces according to claim 1, characterized in that the protective film can be applied to folded portions without thermoforming.

4. The aforementioned substrate layer has a thickness of 1 μm to 400 μm. The protective film for exterior glass or painted surfaces with high weather resistance according to claim 1, characterized in that two or more functional flexible films are heat-laminated together when the thickness is 200 μm to 400 μm.

5. The protective film for a highly weather-resistant exterior glass or painted surface according to claim 4, characterized in that the support is one of PET film, PVC film, PMMA film, PU film, TPU film, or EPU film, the thickness of the support is 10 μm to 200 μm, and the thickness of the functional flexible film is 1 μm to 400 μm.

6. The material further includes a self-healing layer additionally formed on the upper surface of the substrate layer, The self-healing layer is characterized by comprising a polyester-polyurethane hybrid resin obtained by stirring a polyurethane acrylic prepolymer and a polyester prepolymer, and a curing agent, as described in any one of claims 1 to 5, for a highly weather-resistant protective film for exterior glass or painted surfaces.

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