JPS61141609A - Production of stable foamable composition - Google Patents

Abstract

PURPOSE:To obtain a foamable composition having high storability and soluble rapidly in water generating carbon dioxide gas bubbles, by contacting carbon dioxide gas with a water-soluble carbonate, bicarbonate, or with a mixture containing both salts and an organic acid solid at normal temperature, and molding the reaction product. CONSTITUTION:A water-soluble carbonate, bicarbonate, or a mixture containing both salts and an organic acid which is solid at normal temperature is made to contact with carbon dioxide gas, and the product is molded to obtain the objective foamable composition. The carbonate and bicarbonate are sodium or potassium salt, and the organic acid is tartaric acid, oxalic acid, citric acid, succinic acid, malic acid or their mixture.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing a foamable composition that has good storage stability and rapidly dissolves carbon dioxide gas in water while foaming.

[Conventional technology]

Forming a mixture containing a carbonate or/and bicarbonate and an organic acid into an effervescent composition by tabletting or granulation can be used as a detergent, bleach, disinfectant for sol, bath agent, bath salt, etc. It is applied to products such as water purifiers. When these products are added to water, their components react and generate carbon dioxide gas, which has the advantage of quickly dissolving the product. At the same time, it provides consumers with a comfortable feeling of use, which has the effect of increasing the value of the food product. Especially in bath additives, the blood circulation promoting effect of the carbon dioxide gas generated is extensively utilized.

[While the invention is trying to solve the problem @ point]

However, when carbonate and/or bicarbonate coexist with an organic acid, a reaction occurs even with a small amount of water, so the internal pressure of the container increases due to the generation of carbon dioxide gas, causing the container to swell and, in some cases, may cause damage.

If such a problem occurs, not only will the product value be significantly impaired, but there is also a high risk that consumers will lose their interest in 1g. Moreover, in order to obtain a stable product, it is most important to thoroughly prevent the contamination of moisture. Therefore, raw materials and processes are strictly controlled during manufacturing, and attention is paid to preventing moisture from entering the product.Furthermore, after manufacturing, the product is sealed and packaged to keep it safe until it is used by consumers, to prevent moisture absorption. Preventing. Nevertheless, the problem has not been completely solved.As is well known, carbonates, especially the commonly used sodium salts, absorb moisture from the air and easily turn into monohydrates. . Sodium carbonate monohydrate has a water vapor pressure equivalent to about 20% of the relative temperature at room temperature, and if this water vapor condenses at the point of contact between the carbonate or bicarbonate in the product and the organic acid, a reaction will begin. become. However, in order to remove crystal water, it is necessary to heat the water to 100℃ or higher, or to remove it at a humidity of 2.
It is necessary to keep it below 0% and leave it alone, but it is hard to say that it is economically advisable to take such measures.

In addition, bicarbonate decomposes to produce carbonate, carbon dioxide gas, and water, resulting in the above problem.

Therefore, conventionally, when producing foamable compositions, it is necessary to completely remove the water in the organic acids and other raw materials as well as the carbonates and bicarbonates, which makes the production complicated. there was.

[Means for solving problems]

Therefore, the inventors of the present invention have conducted intensive research in order to overcome such problems. , carbonates or/and bicarbonates and organic acids? : We succeeded in stabilizing the product by bringing the mixture containing carbon dioxide into contact with it to chemically change the water and remove water from the system, thereby completing the present invention.

Therefore, the present invention provides a method for producing a foamable composition, which comprises bringing a mixture containing a water-soluble carbonate or/and bicarbonate and an organic acid that is solid at room temperature into contact with carbon dioxide gas, and then molding the mixture. It provides:

In the present invention, water-soluble carbonates and bicarbonates may be used alone or in combination. These counterions include sodium, potassium, and the like. As the organic acid, one selected from tartaric acid, oxalic acid, citric acid, chlorinated acid, malic acid, etc., which are solid at room temperature, or two or more thereof is used. The composition of the pond should be substantially water-free or below 50°C, preferably 1°C.
Organic or inorganic compounds are used that do not liberate water of crystallization at temperatures below 00°C.

In the method of the present invention, the mixture containing the above components is brought into contact with carbon dioxide gas before the molding step, for example, in a mixer, in a storage tank provided between the mixer and the molder, or during the transfer process. The amount of carbon dioxide to be brought into contact with the mixture is 2 by volume.
It is preferable that it is twice or more. The contacting method may be either a solid particle packed bed or a moving 1 fluidized bed.

The mixture thus brought into contact with carbon dioxide gas is molded into a product by a conventional method such as tableting or granulation. It is preferable to prevent this mixture from absorbing moisture from the atmosphere as much as possible after it comes into contact with carbon dioxide gas and until it is molded, and the molded product is stored in sealed packaging.

〔Example〕

Examples and test examples of the present invention are shown below, but the present invention is not limited thereto.

Example 1 Sodium bicarbonate 30% by weight (hereinafter simply referred to as %), sodium carbonate 20%, succinic acid 40%, Glauber's salt 6.3%,
? 10 KPf of a mixture consisting of 3.5% diethylene glycol and 0.2% fragrance was charged into a Nauta mixer [Honkawa Micron m14 Nx-8m, volume 30j]K.

Mixing was carried out for 10 minutes while blowing pure carbon dioxide gas at a flow rate of t 3 Nj/min from a gas blowing nozzle attached to the bottom of the Nauta mixer. The apparent specific gravity of the mixed powder was 0.8; M/-. Next, this powder was sieved using a 16-mesh sieve to remove coarse particles, and then pressed into a tablet machine.
Compress the effervescent tablets with a DC-WD model made by Masina ■ to a ratio of 4 of 1/2 to 100%. I! ! did. this? Also, put aluminum foil on top of the lysopyrene? Laminated with polyethylene terephthalate)L.

The product was placed in a bag made of plastic film and completely sealed using a heat sealer.

Example 2 In Example 1, the flow rate of pure carbon dioxide gas was changed to 25 N/
Effervescent tablets were prepared in the same manner as in Example 1, except that the effervescent tablet was increased to /min, and sealed and packaged in the same manner as in Example 1.

Example 3 Raw material powders in the same amount as in Example 1 were mixed for 10 minutes using a Nauta mixer, and then stored in a conical hotpot 9- with a volume of 30 J before being transferred to a tablet press. At that time, pure carbon dioxide gas was blown at a flow rate of 3 Nj/min for 30 minutes through a Qide inserted into the stored powder bed.

Thereafter, the mixture was sieved, tableted, and sealed in the same manner as in Example 1.

Comparative Example An effervescent tablet was prepared in the same manner as in Example 1, except that pure carbon dioxide gas was not blown into the tablet.

Test Example The effervescent tablets manufactured by rA in Examples 1 to 3 and Comparative Example were tested for stability.

The test method for evaluating the stability of tablets is to test 10 packaged products by
The sample was left in a constant temperature bath at 50° C. for 24 hours, the volume change of each sample was measured before and after that, the average value was taken, and the smaller the volume change, the higher the stability. In order to accurately measure the change in volume, we used a method of placing a water tank (volume 31)'f on an electronic balance and submerging all the packaged tablets in the water tank to measure the weight change of the increased volume of water. The results of the tests used are shown in Table 1. *n=l0 [Effects] As is clear from the results of the stability test range in Table 1, the present invention allows molding to be brought into contact with carbon dioxide gas before molding. The resulting foamable composition exhibited less volume increase during storage and was extremely stable compared to those obtained by conventional methods.

that's all

Claims (1)

[Claims] 1. After contacting a mixture containing a water-soluble carbonate or/and bicarbonate and an organic acid that is solid at room temperature with carbon dioxide gas,
A method for producing a foamable composition, the method comprising molding the composition. 2. The manufacturing method according to claim 1, wherein the carbonate and bicarbonate are sodium or potassium salts. 3. The manufacturing method according to claim 1, wherein the organic acid is one or more selected from tartaric acid, oxalic acid, citric acid, succinic acid, and malic acid.