JP-7856876-B2 - Plastering materials, coating methods, and coated products

Inventors

• 藤本 祐之

Assignees

• 有限会社フジモト工業

Dates

Publication Date

20260512

Application Date

20230123

Claims (6)

1. A plastering material primarily composed of synthetic resin emulsion, consisting of short fibers with a fiber length of 1 to 30 mm and coloring materials. A plastering material for undercoating in which the content (A) of the short fibers per unit of solids is 0.1 to 9% by weight, The synthetic resin emulsion, the coloring material, and the short fibers are comprised of the above, A plastering material for topcoating, wherein the content (B) of the short fibers per unit of solids is less than 1% by weight, A plastering material characterized in that the ratio (D)/C (total weight parts of short fibers in the topcoat plastering material to weight parts of short fibers in the undercoat plastering material) is 0.15 or less .
2. The plastering material according to claim 1, characterized in that the short fibers are cellulose fibers of cotton, linen, or rayon, and at least a portion of them are colored.
3. The plastering material according to claim 2, characterized in that the short fibers are obtained by crushing a woven or knitted fabric.
4. A method for applying plastering materials, characterized by comprising the steps of: applying a plastering material according to any one of claims 1 to 3 with a trowel to form an undercoat layer having irregularities on a substrate; and applying one or more layers of a plastering material on the obtained undercoat layer with a trowel, wherein the material contains a synthetic resin emulsion and a coloring material, the ratio of the total weight parts (D) of short fibers in the topcoat layer to the weight parts (C) of short fibers in the undercoat layer ((D)/(C)) is 0.15 or less, and the content (B) of short fibers per solid content of the topcoat layer is less than 1% by weight, to smooth the surface, thereby forming a pattern of light and dark shades on the painted surface.
5. A method for applying plastering materials according to claim 4, characterized in that it includes an intermediate layer between the undercoat layer and the topcoat layer.
6. A coated product having a base coat layer and a top coat layer formed on a substrate, wherein the base coat layer is a plastering material cured product containing short fibers with a fiber length of 1 to 30 mm and a coloring material in a synthetic resin emulsion cured product, the top coat layer is a plastering material cured product containing a coloring material in a synthetic resin emulsion cured product, the content of short fibers per unit solid content (B) is less than 1% by weight, the ratio ((D)/(C)) of the total weight parts of short fibers in the top coat layer (D) to the weight parts of short fibers in the base coat layer (C) is 0.15 or less, the interface between the top coat layer and the layer adjacent to it below it has irregularities, the surface of the coated product is smooth, and the surface of the coated product has a pattern of light and dark shades.

Description

Applicable under Article 30, Paragraph 2 of the Patent Law. Posted on the website on June 29, 2022. [Publications, etc.] Provided to Isetan Property Design on July 2, 2022. [Publications, etc.] Posted on the website on July 3, 2022. [Publications, etc.] Tables delivered and exhibited at the "Okawa Summer Colors Exhibition 2022" from July 4 to July 7, 2022. [Publications, etc.] Side tables displayed in the showroom of Fujimoto Kogyo Co., Ltd. on July 10, 2022. [Publications, etc.] Samples of denim picture frames provided to MIKATA Professionals, a general incorporated association, on October 27, 2022. The present invention relates to a plastering material, a coating method using the plastering material, and a coated product obtained by the coating method. More specifically, it relates to a plastering material mainly composed of a synthetic resin emulsion and containing a specific amount of short fibers of a specific length, a coating method in which a topcoat layer is applied after troweling the plastering material, and a coated product obtained by the coating method having a smooth surface and a shading pattern. Traditionally, plastering materials have been widely used in the fields of architecture and civil engineering, and many improvements and inventions have been made to enhance their workability, durability, water resistance, and aesthetic appeal. For example, reinforcing fibers for plastering materials, plastering materials, and plastering methods have been proposed, consisting of polyamide fibers with specific single-fiber fineness, fiber length, elongation, and strength, for the purpose of good dispersibility in plastering materials and preventing cracking after plastering work (see Patent Document 1). Regarding coating methods using plastering materials, methods of applying multiple layers of coating are known to create specific patterns or decorative surfaces. For example, a method has been proposed in which a base layer is formed by preparing an aggregate-containing base material and applying it to a substrate so that it has irregularities, and then a pattern is created by applying one or more layers of semi-fluid paint with a trowel while wiping it so that the irregular surface becomes almost smooth, and this trowel-applied layer forms a decorative surface with shading or light and dark patterns (see Patent Document 2). Japanese Patent Publication No. 2002-274903Japanese Patent Application Publication No. 11-62162 The present invention will be described in detail below. The plastering material of the present invention consists of a plastering material mainly composed of a synthetic resin emulsion, short fibers, and a coloring material. Plastering materials are used to create walls, interior walls (such as those in Japanese-style rooms), and floors of buildings, using trowel-based application techniques. They harden through chemical reactions with water and air. Representative plastering materials include lime plaster, diatomaceous earth, Juraku plaster, mortar, and cement mortar, and materials mixed with polymers are also used. The plastering material of the present invention is not particularly limited as long as it is mainly composed of a synthetic resin emulsion, and any such material can be used. There are no particular restrictions on the synthetic resin emulsion, and any known commercially available product can be used. Specifically, examples include acrylic acid, acrylic acid derivatives such as 2-ethylhexyl acrylate, methacrylic acid, methacrylic acid derivatives such as 2-ethylhexyl methacrylate, vinyl acetate, butadiene, styrene-butadiene copolymer, methyl methacrylate, and acrylonitrile. Short fibers are the most important material for exhibiting the effects of the present invention. While there are no particular restrictions on the material of the short fibers as long as the fiber length is 1 to 30 mm, cellulose fibers such as cotton, linen, and rayon are preferred due to their good compatibility with plastering materials, ease of dispersion, and miscibility with plastering materials. The fiber length is in the range of 1 to 30 mm, but the range of 2 to 20 mm is preferred, and the range of 3 to 15 mm is even more preferred. Fibers with a length of less than 1 mm cannot be produced industrially stably. On the other hand, if the length exceeds 30 mm, aggregation of short fibers occurs in the plastering material, making it impossible to obtain a uniform plastering material. The content of short fibers per unit solids in the plastering material (A) is 0.1 to 9% by weight. Preferably, it is 0.15 to 8% by weight, and more preferably, 0.5 to 5% by weight. When the content of short fibers per unit solids in the plastering material is less than 0.1% by weight, the dispersion of short fibers in the plastering material is good, the plastering material is uniform, and the trowel application is good, but the resulting coating lacks shading patterns and has poor aesthetic appeal. On the other hand