JPH0557222B2 - - Google Patents

Description

[Detailed description of the invention]

{Industrial Application Field} The present invention is applicable to buildings and other earthen walls, various wooden boards,
Stains, plasters, fiber walls, etc. formed over a base made of cement mortar etc.
The present invention relates to a composition for Juraku wall and other indoor walls. {Prior Art} For indoor walls formed on a base surface made of earthen walls, wooden boards, etc., compositions such as plaster and plaster have conventionally been made from slaked lime, various aggregates, fibers, etc. and glue. As the glue, a natural glue such as ginkgo biloba or kelp juice, or a synthetic glue such as MC (methyl cellulose) is used. In addition, the composition of indoor walls such as fiber walls and Juraku walls is composed of various aggregates, natural fibers and other materials, and synthetic glues such as CMC (sodium carboxymethyl cellulose). Then, water is added to each of the above-mentioned compositions and kneaded, and the mixture is applied to a soil wall, wooden board, cement mortar, or other base surface and dried to form the above-mentioned interior walls. (Problems to be Solved by the Invention) In the above-mentioned conventional indoor wall compositions, when the base surface is a clay wall or a wooden board, when the base surface is a clay wall or a wooden board, the blemishes or stains are removed from the applied composition. There is a problem that the surface of the formed wall is often contaminated because it easily penetrates into the surface of the wall. To prevent contamination of this wall, the composition is applied in multiple layers or thickly. Therefore, the construction period becomes longer,
Problems such as an increase in the amount of the composition used and an increase in cost occur. When the above-mentioned fiber wall, Juraku wall, etc. compositions are applied to cement mortar or a base material containing a large amount of calcium salt, the stability of CMC deteriorates and changes in quality, resulting in a decrease in adhesive strength and the formation of walls. There are problems such as often peeling off when external force is applied to it. In addition, when each of the above-mentioned compositions is kneaded with water and placed in a container and left for a long period of time, each material will settle and separate, for example, the pigment will separate and adhere to the inner surface of the container. However, it has the drawback of lacking mechanical stability and storage stability. Therefore, it is difficult to store the composition as a kneaded product, and it is necessary to knead the composition with water during construction, which increases the time and effort during construction. The present invention solves the above-mentioned problems, and is capable of preventing stains on the base surface from seeping onto the surface of the applied composition, and improving adhesion to the base surface. The object of the present invention is to provide a composition for interior walls that is free from the risk of peeling. {Means for Solving the Problems} The indoor wall composition of the present invention is characterized in that it is composed of aggregate and/or fiber, a synthetic sizing agent, and succinoglucan, and is kneaded with water. . Examples of the aggregate include slaked lime, shell ash, gypsum, ore powder, ore grains, unfoamed or foamed rubber, plastic, and foamed mineral powder or granules. Or use two or more types. Examples of the fibers include natural fibers, synthetic fibers, inorganic fibers, and pulp, and one or more of these may be cut or crushed. Examples of the synthetic adhesive include cellulose-based adhesives such as methylcellulose, sodium carboxymethylcellulose, and hydroxyethylcellulose, polyvinyl alcohol, and sodium polyacrylate. The succinoglucan improves the stability of the adhesion between the kneaded composition and the underlying surface, and prevents stains and grime generated from the underlying material from penetrating the applied composition and exuding onto the surface. It is a polymer with a main chain consisting of galactose and glucose with a molecular weight of about 2 million or more. The structure of this succinoglucan is as follows. If the amount of succinoglucan added is too small, the effect of the addition will be low, and if it is too large, the viscosity will increase and the workability during kneading will decrease.
In addition, since the coating effect may be reduced, the amount is suitably about 0.2 to 10 parts by weight, preferably about 0.5 to 8 parts by weight, based on 100 parts by weight of the water. In addition, if the viscosity of the above-mentioned materials kneaded with water is too low, fluidity will occur and the thickness will tend to be uneven during application, and if it is too high, the viscosity will be too thin when applied to the base surface. It is appropriate to set the poise to about 5 to 500 poise, but preferably 20 to 100 poise.
It's about a poise. In this composition for indoor walls, the aqueous solution of succinoglucan maintains its viscosity stably over a long period of time without being affected by pH or high concentration of salts, and is capable of preventing sedimentation and separation of each material. In order to prevent this and improve the mechanical stability and storage stability of the kneaded product, each composite material is kneaded with water in advance.
It is also possible to seal it in a container and store it, and then take it out from the container and apply it at the time of construction. In addition, the aggregate and/or fiber, synthetic sizing agent, and succinoglucan are mixed in advance, and water is added to and kneaded at the construction site before use. It is also possible to mix them at the construction site and knead them with water for use. In addition to the above-mentioned components, pigments, dispersants, surfactants, resin emulsions, extenders, etc., which are required depending on the type of wall, etc., can be optionally added. {Function} As mentioned above, this composition for indoor walls is used by kneading each component with water, and is suitable for use on earthen walls, wooden boards, cement mortar, and other arbitrary base surfaces.
Apply with a trowel and dry to form a wall. Due to its dispersibility, high molecular weight, molecular structure, etc., succinoglucan prevents stains or stains generated from the base material from seeping onto the surface of the applied composition, and furthermore, the aqueous solution of succinoglucan Due to its high stability against PH and high concentration of salts, it maintains strong adhesion even to cement mortar and base materials containing a large amount of calcium salt, and prevents walls from peeling off from the base surface. prevent. {Example} Examples of the composition for indoor walls of the present invention will be described with respect to solid walls. The composition for tough walls of this example uses slaked lime and anhydrite as aggregates, methylcellulose as a synthetic sizing agent, and glass fiber as fibers, to which succinoglucan is added,
Prepared by kneading with water. As a comparative example, a composition was prepared in which succinoglucan was removed from the above example. The amount and viscosity of each material in the above examples and comparative examples,
The results are shown in Table 1 below.

【table】

[Table] "Kneaded product viscosity" in Table 1 above indicates the viscosity of the composition obtained by kneading each of the respective composite materials, and these were measured using a rotating cylinder type viscometer. "Addition ratio of succinoglucan" indicates the number of parts by weight of succinoglucan to 100 parts by weight of water, and "workability of application" indicates the workability when applying each composition to the underlying surface with a trowel. showed his sexuality. Also,
"Presence of stains and other contamination" refers to the presence or absence of contamination due to stains or grime that ooze out onto the surface of the wall when each of the above-mentioned compositions is applied to the underlying surface. As the methylcellulose, "hi-Metrose 90SH-15000" manufactured by Shin-Etsu Chemical Co., Ltd. was used. Each of the compositions obtained by kneading the materials of Examples 1 and 2 and Comparative Examples 1 and 2 shown in Table 1 was
The product was applied to a multilayer plywood board measuring 18 cm wide and 9 mm thick using a trowel to a thickness of approximately 1 mm. Note that the 2-3 mm wide portion of the periphery of the plywood board was sloped so that the end portion was thinner. Table 1 shows the results of examining the workability of applying each composition and the contamination of walls formed with each composition due to stains and grime on the base material after being left for two weeks. As is clear from Table 1, the stiff walls formed with the compositions of Examples 1 and 2 to which succinoglucan was added were not contaminated by stains or grime. Since each of these tough walls has good workability and is formed in one coat, the work period can be shortened and the composition can be coated unnecessarily thickly. Since it is unnecessary, it is clear that it can also contribute to cost reduction. However, each of the tough walls formed with the compositions of Comparative Examples 1 and 2 in which no succinoglucan was added was contaminated by stains and grime on the base material. From these results, it is clear that succinoglucan prevents stains and grime from the base material from penetrating into the walls and contaminating them. Next, examples of the composition for indoor walls of the present invention will be described for Juraku walls. The composition of the Juraku wall in this example uses aggregate, colored mountain sand, and black natural sand, a 5% aqueous solution of carboxymethyl cellulose as a synthetic sizing agent, pulverized pulp as a fiber, and an 8% aqueous solution of succinoglucan. It was used. As a comparative example, a composition was prepared by removing the succinoglucan aqueous solution from the above example. The amount and viscosity of each material in the above examples and comparative examples,
The coating results are shown in Table 2.

[Table] "Kneaded product viscosity" in Table 2 above indicates the viscosity of the composition obtained by kneading each of the respective composite materials, and these were measured using a rotating cylinder viscometer. "water"
is a 5% carboxymethylcellulose aqueous solution,
The amount added is shown excluding the water contained in the 8% succinoglucan aqueous solution. As for the 5% carboxymethylcellulose aqueous solution, Sanyo Kokusaku Pulp
8% of "Sunrose F10MG" (product name) manufactured by Co., Ltd.
As the succinoglucan aqueous solution, "Cielflow" (trade name) manufactured by Ciel Chemical Co., Ltd. was used. Each of the compositions obtained by kneading the materials of Examples 3 and 4 and Comparative Examples 3 and 4 shown in Table 2 was prepared in a 25 cm vertical and horizontal It was applied to a cement board measuring 18 cm and 5 mm thick in one coat with a trowel to a thickness of approximately 1 mm when wet. After application, the Juraku wall was left to dry for one week, and the resulting Juraku wall was scratched with a plastic spatula to check for peeling. The results are shown in Table 2. As is clear from the presence or absence of peeling in Table 2, the walls formed in Examples 3 and 4, in which succinoglucan was added, did not peel off easily even when scratched with a plastic spatula; Therefore, it is not affected by the pH or salts of the base material,
It is clear that strong adhesion is maintained. However, when the walls formed with the compositions of Comparative Examples 3 and 4 to which succinoglucan was not added were scratched with a plastic spatula, they all peeled off. {Effects of the Invention} As described above, the composition for indoor walls of the present invention is one in which aggregate and/or fiber, synthetic glue, and succinoglucan are kneaded with water, and the aqueous solution of succinoglucan is The composition is hardly affected by pH or high concentration of salts, and exhibits strong adhesion even to cement mortar and base materials containing large amounts of calcium salts, so the composition can be applied to any base material. It is possible to form a wall with strong adhesion and no risk of peeling. In addition, when the composition is applied to a base material that is prone to stains or scum, such as earthen walls, plywood boards, or other wood boards,
Succinoglucan prevents stains and grime from penetrating the composition due to its dispersibility, high molecular weight, and molecular structure. Therefore, various types of walls can be formed by applying the composition in one coat to a base material made of any material without being contaminated with stains or grime, allowing various walls to be formed efficiently and efficiently. It can be obtained at low cost. This composition for walls can be used by mixing each material except for water and kneading it with water at the construction site, or by mixing each material at the construction site and kneading it with water. However, since succinoglucan increases the mechanical stability and storage stability of the kneaded material, each material is kneaded with water and sealed in a container, which is then taken out from the container and used at the construction site.
It is also possible to eliminate the need for kneading each material at the construction site.

Claims (1)

[Claims] 1. An interior wall composition composed of aggregate and/or fiber, a synthetic sizing agent and succinoglucan and kneaded with water. 2. The indoor wall composition according to claim 1, wherein the amount of succinoglucan added is 0.2 to 10 parts by weight per 100 parts by weight of water. 3 The viscosity of the kneaded product consisting of each composition is 5 to 500.
The indoor wall composition according to claim 1 or 2, which is set to poise.