JPS58151366A - Preservation of clay articles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention prevents deformation and cracking caused by volatile components in the clay, adhesion of dust, and fading of color by coating the surface of a clay model with a film of an organic polymer substance. This article relates to a method for preserving clay sculptures for a long period of time without damaging their original shape or color.

Generally, clay is widely used as children's toys and school teaching materials, and this clay is used to create shaped objects in the shape and color of oak trees. Therefore, there have been requests to preserve these clay sculptures for a long time in their original shape and appearance as future mementos. Here, the clay is usually fine hydrated silicic acid or I
It is prepared by mixing an appropriate amount of water with RIpj powder and kneading it together, but if this clay is left for a long time, the water will evaporate, causing it to lose its shape and cracks, and if the clay is too viscous, it will fade and discolor. The invention solves the above problems and improves the original shape of the clay model.
To provide a method for preserving clay sculptures for a long period of time without impairing their appearance or color.

The method of the present invention involves applying a solution or latex of a polymeric substance and/or a polymerizable compound to the surface of a clay model, and forming the clay model by a polymerization reaction of the polymerizable compound and/or dry removal of the solvent. It is characterized in that the surface of the product is coated with a film of the organic polymer substance.

The organic polymeric substances used in the present invention are plastics, such as polymethyl methacrylate, polyethylene, polypropylene, polyvinyl alcohol, polyvinyl acetate, polystyrene, metal salt crosslinked products of ethylene and unsaturated carboxylic acid copolymers (on request). 7-), polyvinyl chloride, etc., or elastomers such as natural rubber, styrene-1-butadiene rubber, butyl rubber, butadiene rubber, etc., which are 4 molecules soluble in organic or inorganic solvents.

Further, the polymerizable compounds used in the present invention are, for example, if, J
(vinyl chloride, methyl methacrylate), vinyl monomers such as iH, styrene, methacrylic acid, acrylic acid, acrylonitrile, tetrahydrofuran, trioxane,
In addition to ring-opening polymerizable monomers such as lactam and lactam, starting materials for forming plastics for polybonding threads such as alkyd resins, unsaturated polyester resins, polycarbonate resins, and epoxy resins, phenol/formalin resins, urea/formalin resins , melamine/formalin resin, polyurethane, and other starting materials for forming the plastics of addition condensed fibers, but also includes so-called prepolymers obtained by polymerization reaction of these with partial polyurethane.

In the method of the present invention, the organic four-common substance, the polymerizable compound, or a mixture thereof is dissolved in an appropriate solvent to form a solution. Here, when making a solution, when dissolving an organic polymer substance with a solvent, when dissolving a mixture of an organic polymer substance and a polymerizable compound with a solvent, when dissolving a polymerizable metal compound with a solvent, when dissolving an organic polymer substance with a solvent, When dissolving a substance with a polymerizable metal, there is a mode in which the polymerizable compound is used alone, but when using a polymerizable compound, it is necessary to control the polymerization reaction by adding a catalyst and heating to cause the polymerization reaction. However, it has the disadvantage that it is difficult to store because it is polymerized even in a solution state.
It is more desirable to use an i14Ktil dissolved solution.

The solvent used in the present invention is an organic or inorganic solvent such as alcohols, ketones, esters, aliphatic hydrocarbons, aromatic hydrocarbons, water, acidic water, basic water, etc., especially low boiling point solvents. N, t, ethyl alcohol, methyl alcohol, acetone, methyl ethyl ketone, and water are preferable, and water and ethyl alcohol are particularly preferred from the viewpoint of safety for children and the like.

After drying and removing the solvent in the solution containing the polymeric substance, etc., it is necessary to adjust the concentration appropriately so as to form a coating layer of the polymeric substance with a predetermined thickness. Adjust to concentration.

In the present invention, latexes of the above-mentioned organic polymer substances or reactive compounds can also be used. Latex here refers to something in which particles of an organic polymer substance are uniformly dispersed in water and stabilized by an emulsifier (mainly a surfactant). Latex is produced by emulsion polymerization of vinyl monomers or by dispersing a polymer solution in an aqueous solution containing an emulsifier.

A latex with a solid content of 50% by weight or less is usually used.

Therefore, in order to apply a solution or latex of this organic polymer substance to the surface of a clay model, the clay model is immersed in a container containing the solution, or the solution is sprayed onto the clay model. Alternatively, a method may be adopted in which the solution is applied to the clay model with a brush. Drying of a lazy solvent can be carried out by natural drying or hot air drying.

When using a polymerizable compound, it is necessary to add a small amount of a polymerization initiator, such as a peroxide, an acid catalyst, or a chilkali catalyst, and the polymerization reaction is carried out at a predetermined temperature (for example, 80°C to 10°C).
G''C)K This is done by heating or by leaving it at room temperature.

The thickness of the film of the organic polymer substance can be adjusted by adjusting the concentration of the solution, and can further be adjusted by applying the solution several times.

Note that the type of polymeric substance and the type of solvent must be selected depending on the type of clay used. The clay used in the present invention is made by mixing fine hydrated silicon #II salt with an appropriate amount of water and kneading it, or clay made of maple clay, wheat flour, rice flour, potato flour, corn flour, etc., mixed with an appropriate amount of water. Places made by mixing and kneading #Ornaments/clay, elast 7 - Rubber clay made by mixing one or more types of ingredients, plastic clay or paper made by mixing plastics with a specified plasticizer, etc. Clay etc. For example, for clays that contain water, such as inorganic clays or accessory clays, it is recommended to use the above-mentioned solvents, such as ethanol, acetone, etc., that have a high affinity for water, so that a coating film with a uniform thickness can be obtained. desirable for formation. On the other hand, for materials that easily dissolve in w4# agents such as rubber clay and plastic clay, it is recommended to select a solvent that does not dissolve the rubber component or plastic component but is difficult to dissolve, such as ethanol or water. −
Delicious. Furthermore, when the organic polymer substance used in the coating film is used for clay or grain clay, it is necessary that it is insoluble in water. This is because the moisture inside the clay dissolves the polymeric material of the coating film on the surface. Therefore, in this case, it is also possible to form a coating film of an insoluble polymeric substance and then form a coating film of another type of polymeric substance thereon. If the clay is colored, it is desirable to select a material for the coating film made of polymeric material so as to make it transparent in order to maintain the color. For example, methyl methacrylate, acrylonitrile, etc. are used. Furthermore, if the coating film requires flexibility, an elastomer material can be selected, or a rigid plastic can be selected to maintain strength with the main purpose of preventing the clay model from crumbling.

As an application example of the method of the present invention, as shown in FIG. Case(
1) can be commercialized as a product.

However, in the method of the present invention, a coating film is formed on the surface of the clay model using a flexible elastomer or hard plastic, so water, etc. does not evaporate from inside the clay, and the mold (slip and cracks are prevented from occurring). Furthermore, it imparts the luster and strength unique to plastics, and has the effect of preventing clay from fading and contamination, making it extremely effective for long-term preservation.

Example I A grain clay composition with the following composition was prepared.

Composition ^ Wheat flour (strong flour) 100g water
20 parts ethylene glycol 10 parts salad oil 5 parts A model is created using the above grain clay, and its surface is coated with natural rubber latex (composition: 60% water, 85% rubber, protein, soap, fatty acids, styrene, 5% or more F). When a thin film of natural rubber was formed on the surface of the modeling island by applying and air drying, there was no discoloration of the clay and the surface was glossy.

Example 2 A solution of polymethyl methacrylate dissolved in acetone at a concentration of 16% was applied to the surface of a clay model having the same composition as in the example, and the acetone was air-dried.

A transparent, hard coating film was formed on the surface of the modeling island, and the strength of the modeled product was high, causing it to deform and separate.

Example 8 Polymethyl methacrylate dissolved in methyl methacrylate monomer at 20% by weight and a small amount of peroxide added thereto was applied to the surface of a clay model having the same composition as in Example 1. When left at warm temperature (25°C), about 10
After a period of time, the polymerization reaction of the methyl methacrylate was completed, and substantially the same product as in Example 2 was obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of application of the method of the invention. 1... Combination set case of clay and a solution that forms a coating film 2... Clay 8 - Solution that forms a coating film

Claims (5)

[Claims] (1) Apply a solution or latex of an organic tetraaromatic substance and/or polymerizable compound to the surface E1m of the clay model! A method for preserving a clay-shaped article, characterized in that the surface of the clay-shaped article is coated with a film of the organic polymer substance by a polymerization reaction of the polymerizable compound and/or dry removal of the solvent. (2) The method according to claim 1, wherein the organic molecular substance is transparent plastic. (3) The method according to claim 1, wherein the polymerizable compound is a vinyl monomer, a ring-opening polymerizable monomer, a condensation polymerizable compound, or a prepolymer thereof with a low degree of polymerization. (4) The method according to claims 1 to 8, wherein the latex is an emulsion polymerized latex of elastomer or plastic. (5) The method according to claims 914, wherein the clay is grain clay.