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KR-20260062471-A - CHELATE COMPOSITION FOR PREVENTING DISCOLORATION OF SURFACE OF PANEL FOR CONSTRUCTION AND USES THEREOF

KR20260062471AKR 20260062471 AKR20260062471 AKR 20260062471AKR-20260062471-A

Abstract

The present invention relates to a chelate composition for preventing discoloration of a building panel surface comprising a chelating agent, a curing accelerator, a coloring agent, and an additive, wherein the curing accelerator is calcium sulfate dihydrate ( CaSO₄ · 2H₂O ), and the composition is characterized by being ground with a grinding mill to have a particle size of 1 to 20 μm. According to the present invention, the chelate composition for preventing discoloration of the surface of a building panel according to the present invention has an excellent effect of reducing discoloration of the surface of a building panel, and during the manufacturing of a building panel, the curing of the composition is delayed in the initial stage to improve the fluidity of the composition, thereby facilitating the molding of the building panel, and after molding, the composition is cured rapidly to prevent deformation of the molded product, so that the productivity of the building panel can be increased.

Inventors

  • 오광석

Assignees

  • 오광석

Dates

Publication Date
20260507
Application Date
20241029

Claims (11)

  1. A chelating composition for preventing discoloration of the surface of a building panel, comprising a chelating agent, a curing accelerator, a coloring agent, and additives, The above-mentioned hardening accelerator is calcium sulfate dihydrate ( CaSO₄ · 2H₂O ), and The above composition is a chelate composition for preventing discoloration of the surface of a building panel, characterized by being ground with a grinding mill to have a particle size of 1 to 20 μm.
  2. In paragraph 1, A chelate composition for preventing discoloration of the surface of a building panel, characterized in that the grinding is performed in a fine grinder with an internal temperature set to 60℃ or lower.
  3. In paragraph 1, The above chelate composition for preventing discoloration of the surface of a building panel is characterized by comprising 35 to 95 weight% of a chelating agent, 0.1 to 4.5 weight% of a curing accelerator, 0.5 to 5 weight% of a coloring agent, and 3 to 60 weight% of an additive, based on the total weight of the composition.
  4. In paragraph 1, A chelating composition for preventing discoloration of a building panel surface, characterized in that the chelating agent is one or more selected from the group consisting of nitrilotriacetic acid (NTA), ethylenediamine tetraacetic acid (EDTA), diethylenetriamine pentaacetic acid (DTPA), hydroxyethyl ethylenediamine triacetic acid (HEDTA), triethylenetetraamine hexaacetic acid (TTHA), 1,3-propanediamine tetraacetic acid (PDTA), hydroxyethylidene diphosphonic acid (HEDP), nitrilotrismethylene phosphonic acid (NTMP), phosphonobutane tricarboxylic acid (PBTC), EDTA metal salt, DTPA metal salt, and gluconate.
  5. In paragraph 1, A chelate composition for preventing discoloration of a building panel surface, characterized in that the above-mentioned coloring agent is one or more selected from dyes and pigments composed of indigo-based dyes, phthalamide-based dyes, anthraquinone-based dyes, dioxazine-based dyes, and sodium aluminosulfosilicate pigments.
  6. In paragraph 1, A chelate composition for preventing discoloration of the surface of a building panel, characterized in that the above additive is a stabilizer and an antioxidant.
  7. In paragraph 6, A chelate composition for preventing discoloration of the surface of a building panel, characterized in that the above-mentioned stabilizer is one or more selected from the group consisting of potassium sulfate, sodium sulfate, barium sulfate, and magnesium sulfate.
  8. In paragraph 6, A chelate composition for preventing discoloration of the surface of a building panel, characterized in that the above-mentioned antioxidant is one or more selected from the group consisting of potassium oxide, calcium oxide, magnesium oxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, sodium carbonate, sodium bicarbonate, sodium sulfate, and sodium hydroxide.
  9. A building panel surface discoloration prevention agent comprising a chelate composition for preventing discoloration of the building panel surface according to Article 1.
  10. A building panel composition comprising a substrate raw material including one or more of gypsum and cement, and a chelate composition for preventing discoloration of building panels according to claim 1.
  11. In Paragraph 10, A building panel composition characterized by including the above-mentioned chelate composition for preventing discoloration of building panels in an amount of 0.1 to 3.5 weight% relative to the total weight of the base material.

Description

Chelate composition for preventing discoloration of surface of construction panel and uses thereof The present invention relates to a chelate composition for preventing discoloration of the surface of a building panel and its use. More specifically, the invention relates to a chelate composition for preventing discoloration of the surface of a building panel comprising a chelating agent, a curing accelerator, a coloring agent, and an additive, wherein the curing accelerator is calcium sulfate dihydrate ( CaSO₄ · 2H₂O ), and the composition is characterized by being ground using a grinding mill to have a particle size of 1 to 20 μm. It concerns the use thereof. Gypsum board and cement board are construction materials primarily used for interior walls, ceilings, and partitions. In particular, gypsum board offers the advantage of fast construction speed because it allows for convenient dry installation using screws and nails without the need for water, and the wall structure is constructed by installing a framework using lightweight steel and then attaching the gypsum board panels. Additionally, when used as a substitute for mortar, it provides a highly flat surface. Furthermore, it is non-combustible, and when combined with multi-layer insulation, it offers excellent thermal insulation, fire resistance, and soundproofing performance. Above all, because it is lighter than other construction materials, it is widely used in apartments, shopping centers, and commercial buildings, and its use is on the rise. Oil-based or water-based paints are primarily used to finish the surfaces of architectural panels such as gypsum boards and cement boards. Oil-based paint is diluted with thinner and is suitable for surfaces like wood, windows, and metal, characterized by its high gloss. However, due to its strong odor, it can negatively affect the working environment during indoor painting, so proper ventilation is required during and after the process. Water-based paint is diluted with water, making it convenient to use and suitable for a wide variety of surfaces, including wood, concrete, cement, wallpaper, and gypsum boards. Water-based paint is typically sold in white; it has the advantage of being much less odorous than oil-based paint and is eco-friendly as it is free from harmful substances such as VOCs (Volatile Organic Compounds). Due to these advantages, water-based paint is mostly used for finishing when installing gypsum boards in commercial buildings, shopping centers, and offices. When finishing the surface of a building panel with water-based paint, the high moisture content components and moisture within the water-based paint are absorbed into the core of the gypsum board, and when the paint dries, the absorbed moisture and components seep out to the surface. At this time, iron, which is one of the components contained in the gypsum board or cement board, moves together with the moisture and components seeping out during the paint drying and the highly soluble salt components to the coating layer. Consequently, the white water-based paint finish layer becomes contaminated by iron and discolors to a light yellow, brown, or reddish-brown, resulting in an aesthetically unpleasing condition. In order to prevent the occurrence of such problems, conventional methods used copper sulfate, potassium ferricyanide, and potassium ferrocyanide to induce strong coordination bonds with metal ions and prevent discoloration. However, these substances have the disadvantage of requiring great caution during use because they are dangerous, as they exhibit very strong acute toxicity, cause severe poisoning, and have a high lethality rate. As another conventional technology to resolve the problems associated with the use of copper sulfate, potassium ferricyanide, and potassium ferrocyanide, it is known that compounds having two or more coordination bonds, particularly aminocarboxylic acid-based, phosphate-based, and chelating metal salts, are applied as chelating agents to effectively bind with metal ions and form complex salts. Specifically, Korean Registered Patent No. 1646925 sought to reduce discoloration of the gypsum board surface by using aminocarboxylic acid-based, phosphate-based, and chelating metal salts as chelating agents and applying an antioxidant. Meanwhile, gypsum hardening accelerators are added during the production and manufacturing of gypsum boards to maximize productivity. The hardening speed is determined by the rate of chemical reaction in which hemihydrate gypsum (CaSO₄·0.5H₂O) hardens as it is converted into dihydrate gypsum (CaSO₄·2H₂O) through hydration when mixed with water; this speed is particularly influenced by the addition of hardening accelerators. While the addition of hardening accelerators offers the advantage of increasing productivity by raising the hardening speed, the use of large amounts of these accelerators can actually cause discoloration due to excessive heat generated by strong chemic