CN-122003472-A - Coating composition, coating film, and method for producing coating film

Abstract

The coating composition comprises profiled silica particles having an average particle diameter of 12-250 nm, hydrophobic resin particles having an average particle diameter of 50-500 nm, and water-insoluble mold-resistant particles having rod-like, needle-like or fibrous crystallinity, a crystal length of 1-10 mm, a crystal size of 0.1-15 μm, and a pH of a mixture of the profiled silica particles, the hydrophobic resin particles, water and the mold-resistant particles being alkaline at 9-11.

Inventors

• Nan Chubu
• YASUHIRO YOSHIDA
• Koyama natsumi
• ANDO YOSHINORI

Assignees

• 三菱电机株式会社

Dates

Publication Date

20260508

Application Date

20231013

Claims (15)

1. 1. A coating composition comprising shaped silica particles having an average particle diameter of 12-250 nm, hydrophobic resin particles having an average particle diameter of 50-500 nm, and hardly water-soluble mold-resistant particles having rod-like, needle-like or fibrous crystallinity, a crystal length of 1-10 mm, a crystal thickness of 0.1-15 μm, And (3) mixing the irregularly-shaped silica particles, the hydrophobic resin particles, the water and the mildew-resistant particles to obtain a mixed solution with an alkaline pH of 9-11.
2. 2. The coating composition of claim 1, wherein the shaped silica particles are chain-like or beaded.
3. 3. The coating composition according to claim 1 or 2, wherein the weight ratio of the shaped silica particles to the hydrophobic resin particles is 70:30 to 95:5.
4. 4. The coating composition according to any one of claims 1 to 3, wherein the irregularly shaped silica particles are 0.1wt% or more and 15wt% or less in the mixed solution.
5. 5. The coating composition according to any one of claims 1 to 4, comprising sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium silicate or lithium silicate.
6. 6. The coating composition according to any one of claims 1 to 5, wherein the hydrophobic resin particles are fluorine resins.
7. 7. The coating composition according to any one of claims 1 to 6, wherein the anti-mildew particles comprise a benzimidazole-based or iodine-based anti-mildew agent, and have a solubility in water of 0.1% or less.
8. 8. The coating composition according to any one of claims 1-6, wherein the anti-mildew particles are IPBC.
9. 9. The coating composition according to any one of claims 1 to 8, further comprising a water-soluble antimycotic agent.
10. 10. The coating composition according to any one of claims 1 to 9, wherein the mold-resistant particles have rod-like crystallinity, and a ratio of a short diameter to a long diameter is 1.2 or more.
11. 11. A coating film comprising irregularly shaped silica particles having an average particle diameter of 12-250 nm, hydrophobic resin particles having an average particle diameter of 50-500 nm, and hardly water-soluble mold-resistant particles having rod-like, needle-like or fibrous crystallinity, a crystal length of 1-10 mm, and a crystal thickness of 0.1-15 μm.
12. 12. The coated film of claim 11, wherein the attached water exhibits alkalinity.
13. 13. A method for producing a coating film, which comprises a step of applying a coating composition onto a substrate, and a step of natural drying or warm air drying, The coating composition comprises profiled silica particles having an average particle diameter of 12-250 nm, hydrophobic resin particles having an average particle diameter of 50-500 nm, hardly water-soluble mold-resistant particles having rod-like, needle-like or fibrous crystallinity and having a crystal length of 1-10 mm, a crystal thickness of 0.1-15 μm, and water.
14. 14. The method for producing a coated film according to claim 13, wherein the substrate is a ceiling material or a wall material having water absorption property.
15. 15. The method for producing a coating film according to claim 13 or 14, comprising a step of applying the coating composition to the substrate using a brush or a roll.

Description

Coating composition, coating film, and method for producing coating film Technical Field The present disclosure relates to a coating composition formed on a substrate or the like, a coating film, and a method for producing a coating film. Background In an indoor space, for example, a ceiling or a wall around the refrigerator or the freezer is cooled by cold radiation from the refrigerator or the freezer, and condensation may be easily generated in combination with warm air flowing from the outside. In addition, it is also often possible to see a scene in which dew condensation or dirt is generated on a ceiling or a wall in the vicinity of an outlet of an air conditioner. In such a place, since mold is likely to be generated by moisture or dirt due to dew condensation as a nutrient, countermeasures for suppressing the generation of mold are required in view of recent improvement in the requirement for cleanliness. As a countermeasure against the occurrence of mold, a technique has been developed in which dew condensation, dirt, and mold caused by them are prevented from occurring by optimizing the air conditioning capacity. Patent document 1 discloses a method of containing a water-insoluble mold inhibitor in a gypsum board as a ceiling material. Patent document 2 discloses a technique for imparting antifouling property and antibacterial property by using an aqueous coating agent composed of a photocatalytic oxide, a hydrophobic resin emulsion, and silica particles. Prior art literature Patent literature Patent document 1 Japanese patent No. 5520603 Patent document 2 Japanese patent laid-open publication No. 2005-105053 Disclosure of Invention Problems to be solved by the invention However, in order to optimize the air conditioning capacity in each indoor space, time and cost are required in design, and an exact effect may not be obtained due to environmental and equipment restrictions. In addition, as in patent document 1, in order to use a mildew-resistant gypsum board as a ceiling material, a conventional ceiling is constructed on a large scale, and the cost increases. Further, as in patent document 2, the effect of the functional coating agent using the photocatalyst in the dark portion is limited. It is necessary to suppress dew condensation, dirt, and mold generation due to them in the conventional ceiling, wall, or other articles. The present disclosure has been made to solve the above-described problems, and an object of the present disclosure is to provide a coating composition, a coating film, and a method for producing a coating film, which can suppress dew condensation, dirt, and mold generation caused by the dew condensation, dirt, and dirt with respect to a conventional ceiling, wall, or other article. Means for solving the problems The coating composition comprises profiled silica particles having an average particle diameter of 12-250 nm, hydrophobic resin particles having an average particle diameter of 50-500 nm, and water-insoluble mold-resistant particles having rod-like, needle-like or fibrous crystallinity and having a crystal length of 1-10 mm, a crystal size of 0.1-15 μm, wherein a mixed solution of the profiled silica particles, the hydrophobic resin particles, water and the mold-resistant particles is alkaline having a pH of 9-11. ADVANTAGEOUS EFFECTS OF INVENTION According to the present disclosure, dew condensation, dirt, and mold generation due to them can be suppressed for existing ceilings, walls, or other articles. Thereby, the cleanliness can be maintained. Drawings Fig. 1 is a schematic cross-sectional view showing a coating film according to embodiment 1. Fig. 2 is a schematic diagram showing chain-shaped irregularly shaped silica particles according to embodiment 1. Fig. 3 is a schematic diagram showing a candid shaped irregularly shaped silica particle according to embodiment 1. Detailed Description Embodiments of a coating composition, a coating film, and a method for producing a coating film of the present disclosure are described below with reference to the drawings. The present disclosure is not limited to the embodiments described below. In the drawings, the relationship between the sizes of the constituent members may be different from the actual relationship. In the following description, terms indicating directions are appropriately used for explaining the present disclosure, and these terms do not limit the present disclosure, in order to facilitate understanding of the present disclosure. The terms indicating the direction include, for example, "upper", "lower", "right", "left", "front" and "rear". Embodiment 1. Fig. 1 is a schematic cross-sectional view showing a coating film 5 according to embodiment 1. As shown in fig. 1, the coating film 5 is formed by applying a coating composition, which is an aqueous mixture liquid containing the irregularly shaped silica particles 2, the hydrophobic resin particles 3, and the mold resistant particles 4, to the substrate