JP-7856998-B2 - Heat-resistant coatings, heat-resistant fabrics, and heat-resistant products

Inventors

• 山本 雅章
• 山本 章一
• 山本 大樹

Assignees

• 有限会社比土工業

Dates

Publication Date

20260512

Application Date

20210712

Claims (5)

1. A heat-resistant coating material that is applied to the surface of a fabric, The aforementioned heat-resistant coating material is used in heat-resistant products used in environments where molten metal is scattered. This is a coating drying agent that contains silicone as its main component and also contains aluminum hydroxide, a metal hydroxide, as a slurry. The aforementioned silicone includes silicone rubber and silicone oil. The slurry contains 50% to 70% by mass of silicone and 30% to 40% by mass of metal hydroxide, based on the total solid mass. The heat-resistant coating material is characterized by containing a pigment and being colored with the pigment to a color other than white.
2. The heat-resistant coating material according to claim 1, characterized in that the silicone is contained in an amount of 60% to 70% by mass and the metal hydroxide in an amount of 30% to 40% by mass, based on the total solid mass of the slurry.
3. The heat-resistant coating material is characterized by containing silica particles, wherein the silica particle content is 0.5% to 3% by mass relative to the total solid mass of the slurry, as described in claim 1 or 2.
4. A heat-resistant fabric comprising a woven fabric and a covering material covering its surface, wherein the covering material is a heat-resistant covering material according to any one of claims 1 to 3 .
5. A heat-resistant product characterized by being sewn with the heat-resistant fabric described in claim 4 , wherein the heat-resistant covering material is the outer fabric and the woven fabric is the lining.

Description

This invention relates to a heat-resistant coating material used in heat-resistant products used in environments where high-temperature splatters such as molten metal are scattered, such as in the metal manufacturing industry; a heat-resistant fabric equipped with this heat-resistant coating material; and a heat-resistant product. Work performed in electric furnaces and smelting furnaces, as well as welding operations, often involves the scattering of high-temperature flying materials such as molten metal, spatter, and sparks (hereinafter simply referred to as molten metal, etc.). To protect workers from such harsh environments, heat-resistant clothing is generally used. Heat-resistant clothing requires properties such as heat resistance and flame retardancy. Traditionally, heat-resistant clothing has been made from 100% cotton fabric. Heat-resistant clothing made from 100% cotton fabric is widely available because it is less flammable than clothing made from common synthetic resin fibers (such as polyester), and also has a pleasant feel against the skin. Other materials, such as aramid and polyimide fibers, have also been proposed as materials with high heat resistance and flame retardancy (see, for example, Patent Document 1). However, with cotton and synthetic resin fabrics, there is a concern that molten metal may adhere to the surface and penetrate through the folds where the fibers are intertwined, potentially causing molten pores. One known solution to this problem is to coat the surface of the fabric with a coating material such as resin. For example, Patent Document 2 proposes a protective clothing fabric made of aramid fibers coated with a predetermined fluororesin. This fabric, due to the predetermined fluororesin, possesses not only heat resistance but also spatter resistance to molten metals and the like. Japanese Patent Publication No. 2001-214318Japanese Patent Application Publication No. 8-158262 This figure shows an example of the heat-resistant fabric of the present invention. The heat-resistant coating material of the present invention is used in heat-resistant products (e.g., heat-resistant clothing) that protect workers and objects from high-temperature flying debris generated in places such as steel blast furnaces, aluminum electrolysis and casting plants, and welding plants. It is formed on the side that comes into contact with the high-temperature flying debris. The heat-resistant coating material of the present invention contains silicone as its main component and also contains metal hydroxides to further improve flame retardancy and adhesion resistance. This allows the fabric to exhibit heat resistance, flame retardancy, and anti-adhesion properties, while maintaining its flexibility even when coated on the surface, resulting in excellent processability for clothing and equipment. Therefore, the coating material's effects are fully realized, and the fabric itself boasts superior durability. For example, heat-resistant clothing made with this fabric can be thinner than conventional 100% cotton heat-resistant clothing, improving comfort and stretchability, and contributing to reduced burden on workers. An example of a heat-resistant fabric equipped with the heat-resistant coating material of the present invention will be explained with reference to Figure 1. As shown in Figure 1, the fabric 1 has a coating material 2 formed on the surface of a cloth 3. The coating material 2 is formed by adhering a predetermined slurry to the cloth 3 by spraying, brushing, or dipping, and then drying a dispersion medium such as water or alcohol. In this case, either natural drying or forced drying may be used. This fabric 1 can be appropriately processed into heat-resistant products used in environments where high-temperature flying materials are scattered, such as heat-resistant clothing. Coating material 2 is a coating and drying material consisting mainly of silicone and a slurry containing metal hydroxide. Furthermore, "slurry-based coating and drying material" refers to a component obtained by coating a fabric with the above slurry and drying it. The following provides a detailed explanation of the components of the covering material 2 in fabric 1. <Silicone> Silicone is the main component of the coating material and is a component that imparts heat resistance, flame retardancy, flexibility, and other properties to the coating material. In the present invention, the silicone only needs to be capable of forming an organopolysiloxane coating layer, and there are no particular restrictions on its molecular structure, the type of organic group bonded to the silicon atom, the type of group or atom other than the organic group bonded to the silicon atom, or the degree of polymerization of the siloxane. In this invention, "silicone" is a concept that includes silicone rubber, silicone oil, and silicone resin. These may be used individually or in combination of two or more types. Examples of silicone ru