JPH02245040A - Clay-like molding material - Google Patents

Abstract

PURPOSE:To obtain a clay-like molding material excellent in handleability and workability by adding a water-soluble oxidizing agent to a liquid mixture before kneading it with a powdery material based on a starch powder, a PVA powder and a surfactant. CONSTITUTION:A powdery material based on a starch powder, a PVA powder and a surfactant powder and optionally an inorganic filler (e.g. diatomaceous earth) is kneaded with a liquid mixture comprising water, a polyol, a plasticizer (e.g. liquid paraffin) and a polyvinyl acetate emulsion after a water-soluble oxidizing agent (e.g. hydrogen peroxide, chlorine oxide, an alkali peroxide, an alkali percarbonate or ozone) is added to the above liquid mixture. A clay- like molding material excellent in handleability and workability can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clay-like molding material, which can be used as a daily necessities material,
The purpose is to supply molding materials of excellent quality and easy to handle, useful as work materials, interior materials, filling materials, etc., to various fields at low cost.

[Conventional technology and its problems]

Conventionally, various starch-based clay-like molding materials are commercially available, but many of them have a unique odor, and when handled in large quantities, it may cause an unpleasant feeling during work, molding, and drying, depending on the individual. This is a source of public complaints.

As a result of extensive research to eliminate these drawbacks, the inventor of the present invention found that the problem was caused by various impurities contained in the raw materials. It was recognized that the task was to stabilize quality by removing or reducing the concentration of

[Means for solving problems]

The present inventor has developed a powder material consisting mainly of starch-based powder, polyvinyl alcohol powder, and surfactant powder, and water and a powder material containing an inorganic filler as the main ingredients.

When kneading a liquid mixture consisting of a polyol, a plasticizer, and a polyvinyl acetate emulsion, a water-soluble oxidizing agent is added in advance to the liquid mixture, resulting in a clay of excellent quality and high commercial value that has never been seen before. They learned that it was possible to supply molding materials in large quantities and at low cost. The water-soluble oxidizing agent is at least one substance from the group consisting of hydrogen peroxide, chlorine oxide, oxygen-containing chloric acid and its salts, alkali peroxide, alkali percarbonate, alkali perborate, and ozone.

Starch-based powder is one or a mixture of two or more of wheat flour, barley flour, rice flour, corn tL miscellaneous Ft flour, corn starch, various potato starch, bracken starch, kubiokaden flour 1 bulb starch, etc. Depending on the case, some or all of these starch-based powders may be alpha-ized, and their composition can be changed freely.

What is polyvinyl alcohol powder? Polyvinyl alcohol,
It can be selected from partially saponified polyvinyl acetate, partially acetalized polyvinyl alcohol, and partially methylolated polyvinyl alcohol, and in some cases, these may be mixed as long as they are in powder form.

Surfactant powder can be any of anionic surfactants, nonionic surfactants, and cationic surfactants, but the most commonly used are nonionic surfactants, specifically sucrose fatty acid esters and sorbitan fatty acid esters. , water-soluble glucose derivatives, water-soluble fiber derivatives, water-soluble starch derivatives, konjac mannan, carrageenan, sodium alginate.

There are zarep7nan, seaweed mucilage, etc. Among these surfactants, those having a high molecular weight also act as dispersants, so their amount may be relatively small.

In addition, if necessary, inorganic fillers used to improve the moldability of clay include diatomaceous earth, aerosil silica, white carbon, silica gel powder, alumina powder, iron oxide powder, carbon blank, titanium oxide, Aluminum silicate (clays), magnesium silicate (talc).

Examples include calcium silicate (wollastonite).

Even if the above-mentioned powder materials are not in an absolutely dry state, it is preferable that the powders be sufficiently mixed together in advance so that the appearance is uniform.

A small amount of aluminum sulfate, aluminum acetate, iron sulfate, alum, potassium alum, aluminum hydroxide, or magnesium hydroxide may be added as an astringent or coagulation aid.

Polyols include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol trimethyl glycol, and dipropylene glycol.

triflopylene gelicol, butylene glycol.

Dibutylene glycol, ethylene propylene glycol, glycerin, diglycerin, glycerin monofatty acid ester, glycerin monoether, etc., and these can be used alone or as a mixture. Both are soluble in water, which acts as a wetting agent and improves the flexibility of clay during molding and its sterilization properties during storage.

Plasticizer is a high boiling point organic solvent, liquid paraffin
Phthalic acid dialkyl ester, phosphoric acid triester, adipic acid diester, cepatic acid diester, glycerin diester, glycerin triester, glycol higher fatty acid ester.These are used to prevent elongation of clay-like molding materials during molding and cracking caused by rapid drying. It is useful for preventing adhesion to hands and utensils, and for preventing damage to molded products.

The polyvinyl acetate emulsion acts as a binder for the powder material mentioned above, contributing to temporary moldability and permanent shape preservation. Water is required as the primary wetting agent and plasticizer during kneading and molding. If necessary, boric acid as a preservative, sodium dehyde acetate, sorbic acid, biocide, an antioxidant, and a coloring agent may be appropriately added.

What is important in the present invention is to add a water-soluble oxidizing agent to the liquid mixture in advance when kneading the powder material and the liquid mixture. Hydrogen water, Oxidol, Oxyflu, 5
% chlorine dioxide aqueous solution.

These include an aqueous solution of sodium hypochlorite, a low-temperature neutralized aqueous solution of antiformin 5 sodium peroxide, a low-temperature neutralized aqueous solution of sodium percarbonate, an aqueous solution containing perborate, Perbon, and ozone-saturated water. Among these, those that are industrially important are 5% chlorine dioxide aqueous solutions, such as Diodora (K., Soken Chemical Co., Ltd.).

Existing chemical substance number 1m243) is easy to use.

The addition of this water-soluble oxidizing agent may vary depending on the odor of the liquid mixture.
．． It is used in an amount of 5 to 5.0% by weight, but it goes without saying that it should be added with care so as not to affect the moldability, flexibility, and strength of the clay-like molding material.

〔Example〕

The present inventors have clarified the superiority of the present invention as described above through numerous experiments, and below, the first embodiment will be shown and its embodiments will be explained.

Example 1 50,000 g of corn starch flour, pregelatinized wheat'FA2
000g, roasted diatomaceous earth 3000g, polyvinyl alcohol powder 2000g, aluminum sulfate powder 30h
, 300g of sucrose fatty acid ester is blended and mixed thoroughly to prepare a powder material. Meanwhile, 10,000g of water
liquid halafine 3000g, propylene glycol 1
An aqueous dispersion was prepared by mixing 600 g of Span, 80,800 g of Span, 540 g of dibutyl phthalate 1-1, 300 g of Biocide, and 10,000 g of a 40% polyvinyl acetate emulsion. Next to this is Diodora-100
After confirming that the state of the aqueous dispersion did not change significantly, this liquid mixture was added to the powder material and vigorously kneaded at 50 to 60 °C. It is cooled to room temperature to form a clay-like molding material. This material is almost odorless and easy to process during actual use.
When 0g was added and the same procedure was performed, the resulting clay-like molding material had a very acidic odor, and many complaints occurred during processing.

Example 2 Wheat flour (2 types of combination product) 26000g, Halichodendron flour 1000g, Polyvinyl alcohol powder 1000g,
Alum powder 200g, sucrose fatty acid ester 200g
, 100 g of sodium devidroacetate and 50 g of sorbic acid are mixed thoroughly to prepare a powder material.

On the other hand, 20,000 g of water, 7 ml of liquid rose 20
00g, butylene gellicol 800g, dibutylazibe-I-200g, titanium oxide 100g,
An aqueous dispersion was prepared by mixing 20,000 g of a 40% polyvinyl acetate emulsion. Next, 150 g of Diodora was added to this and stirred at 40°C for 2 hours. After confirming that the state of the aqueous dispersion did not change significantly, this liquid mixture was added to the above powder material and stirred at about 60°C. After kneading, the mixture is cooled to room temperature to obtain a clay-like molding material.

This material is almost odorless and has good moldability. In this example, when 100 g of water was added without adding Diodora and the product was made in the same way, it had a strong chemical odor, which was extremely unpleasant when molded in large quantities, and caused itching on the skin.

〔Effect of the invention〕

With the completion of this invention, a clay-like molding material with excellent handling and workability not found in conventional products will be available on the market, and will be widely used by both amateur molders and professional molders. It is now guaranteed that you can use it with peace of mind.

In addition, the product of the present invention after one month has become slightly paler than the conventional product, and furthermore, the product of the present invention is almost odorless, so it is possible to add a scent of your choice by adding various fragrances. This allows the user to work comfortably. Therefore, the effects of the present invention are tremendous.

Claims (2)

[Claims] (1) From a powder material consisting mainly of starch powder, polyvinyl alcohol powder, and surfactant powder, with inorganic filler added if necessary, and water, polyol, plasticizer, and polyvinyl acetate emulsion. A clay-like molding material characterized in that a water-soluble oxidizing agent is added in advance to the liquid mixture when kneading the liquid mixture. (2) The water-soluble oxide is at least one substance selected from the group consisting of hydrogen peroxide, chlorine oxide, oxygen-containing chloric acid and its salts, alkali peroxide, alkali percarbonate, alkali perborate, and ozone. The clay-like molding material according to claim (1).