JPH0642902B2 - Gel type deodorant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention uses a gelling agent to gel a deodorant and installs it in an odor generating place (for example, in a refrigerator, a toilet, a room, a car, etc.). The present invention relates to a deodorant capable of removing a bad odor just by performing.

(Prior Art and Problems to be Solved by the Invention) There are a large number of patented inventions relating to deodorants.
It can be classified into various methods.

(1) Sensation (acts on olfaction) (2) Physical adsorption (3) Microorganism (4) Chemical reaction For these, (1) is a so-called masking method using a fragrance, , It may be mixed with a foul odor and feel uncomfortable. In (2), activated carbon is the mainstream, but it is weak against moisture, and it also absorbs odors that are preferable to humans. In (3), the fast-acting effect is weak and the tube method is often difficult.
On the other hand, (4) is a method that is effective instantaneously, is extremely easy and safe to handle by properly selecting the drug to be used, and can surely achieve the target deodorization.

The present invention provides a gel type deodorant containing the chemical reaction type deodorant in a gel. Currently, odors are generated in the refrigerator and toilets (home,
It can be said that it is a place where a closed space is easily formed in any case such as a bus, a vehicle, an airplane, etc.) and an automobile, and the odor diffusion efficiency is extremely poor. It is desirable to avoid spraying a drug or the like into such a space as much as possible, and the most commonly used solution is activated carbon or a fragrance. Both of them have deodorizing ability, of course, activated carbon, but activated carbon deteriorates due to moisture, and in addition to bad odors, it also absorbs scents from fragrances and odors that do not feel bad, and the actual bad odors When they do occur, their abilities are often diminished. On the other hand, the chemical reaction type gel deodorant selectively reacts with only the bad odor depending on the contained agent, and the water contained in the gel evaporates with the passage of days, and the gel shrinks. Therefore, there is an advantage that the replacement time can be visually judged. Further, a method of putting a liquid deodorant in a container at the place where the odor is generated is also possible, but when vibrated or collapsed, the liquid easily flows out and contaminates the surrounding area. However, such problems can be solved all at once by gelling the liquid deodorant. Further, there are gel type deodorizing agents which are currently on the market, but they do not have a satisfactory deodorizing ability (described in Example 3 as a comparative product).

(Means for Solving the Problems) The present invention has been made to solve the above problems, and provides a novel gel-type deodorant. That is, the gel type deodorant of the present invention has a molecular weight of 40,000 to 300,00.
2 to 30% by weight of sodium polyacrylate or ammonium polyacrylate up to 0 and 1 to 10% by weight of diglycidyl ether or polyglycidyl ether
And 5 to 40% by weight of a chemically reactive deodorant containing a betaine compound as an active ingredient, and the balance being water.

According to the Chemical Dictionary (Kyoritsu Shuppan Co., Ltd., 1981 edition), the gel here refers to "a state in which colloidal particles or polymer solutes lose their independent motility due to an interaction and have an assembled structure and are solidified. . "Is described. Many gel substances are found in our daily lives such as tofu, konjac, kamaboko, pudding, zee, eggs, and other foods, disposable diapers, sanitary products, and fragrances. Gel-forming substances are usually classified into natural products and synthetic products, and representative substances are as follows.

Natural products: agar, gelatin, egg white, starch, carrageenan, sodium alginate, etc. Synthetic products: polyvinyl alcohol, carboxymethyl cellulose, sodium polyacrylate, polyacryloamide, etc. It is generally dependent on intermolecular force, and exhibits reversible behavior between gel and sol by heating / cooling. On the other hand, the compound may be three-dimensionally reticulated by a crosslinking reaction by light or radiation, or may be three-dimensionally reticulated by a crosslinking agent. At this time, since the bonding portion at the cross-linking point is a covalent bond, the reversibility between the gel and the sol due to temperature change becomes very poor as in a natural product, and it can be said that it is irreversible. We are considering the use of the gel type deodorant in the above-mentioned refrigerator, toilet, automobile, etc. The operating temperature in these cases is 50 to 70 ° C in the automobile parked in summer and 0 in the refrigerator. It is under a wide range of severe temperature conditions of ~ 4 ° C. Therefore, it is not preferable to have reversibility between the gel and the sol by heating and cooling such as natural products. For these reasons, we have selected a gel-forming substance and a cross-linking agent which are not reversible between gel and sol due to temperature change, and have tried to incorporate a deodorant into the resulting gel. The molecular weight of sodium polyacrylate or ammonium polyacrylate used was 10,000, 40,000, 140,000, 2
There are four types of 80,000. However, as will be described later in the examples, it was found that a molecular weight of 10,000 was not suitable, so it was decided to exclude it from the present invention. Further, the amount thereof is set to 2 to 30% by weight of the total composition because it is a preferable range for obtaining a suitable gel.

As the crosslinking agent, usually an aldehyde compound, an amine compound,
Although an oxirane compound or the like is used, the oxirane compound is selected in the present invention. This is because other aldehyde compounds and amine compounds generally have strong odors and are judged to be unsuitable. Furthermore, commercially available diglycidyl ether or polyglycidyl ether was selected as the oxirane compound. Examples of diglycidyl ethers include ethylene glycol glycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and polyglycidyl ethers such as trimethylolpropane polyglycidyl ether and polyglyceride. Examples include roll polyglycidyl ether, glycerol polyglycidyl ether, and diglycerol polyglycidyl ether. The blending amount is set to 1 to 10% by weight of the total composition because this is also a preferable range for obtaining a suitable gel.

As the chemical reaction type deodorant containing a betaine type compound as an active ingredient, a commercially available drug “In-house product, trade name: Epolion (registered trademark)” was used. The compounding amount with respect to the total composition was set in the range of 5 to 40% by weight, but in this range, the correlation with the gel strength (whether or not to maintain the form as a gel),
It can be arbitrarily selected. This deodorant is a commercial product of the one disclosed in Japanese Patent Application Laid-Open No. 62-102760 (Japanese Patent Application No. 62-242922) relating to the invention of the present inventor. The reason for selecting this deodorant in the present invention is that it is excellent in deodorizing ability especially against alkaline odors such as ammonia or trimethylamine and acidic odors such as hydrogen sulfide or methyl mercaptan among the chemical reaction type deodorants and it is colorless and transparent. It is a liquid, does not color when contained in a gel, and is odorless. By the way, many of the deodorants called natural extracts on the market have a unique odor.

(Action) Table-1 shows our own products, Epolion ER-10 type, Epolion N-
Deodorant test results for 100 type and Epolion S type, and a solution type deodorant commercially available for comparison, A
~ The deodorizing ability for four types of Company D is described.

Test method: Headspace method using a 500 ml Erlenmeyer flask.

(1) Amount of deodorant used = 1.0 ml (2) Amount of water used = 10.0 ml (Used so that the deodorant can be uniformly mixed in the flask during shaking.) (3) Temperature = room temperature (25 ° C) (4) Shaking time = 5 minutes (5) Odor gas concentration = described as a blank value in Table-1. (1.0 ml of each preliminarily prepared odor solution was weighed into a flask.) (6) Measurement method = Kitagawa type gas detector tube A hole pipette was used to measure each liquid amount.
As is clear from Table 1, when comprehensively considering the appearance, odor, pH, deodorizing ability, etc., it is judged that Epolion N-100 type is suitable as the deodorant contained in the gel.
Further, the reaction mechanism for various odorous substances is as follows (JP-A-62-102760).

(1) -COOH + NH ₃ → -COONH ₄ (2) -COOH + N (CH ₃ ) ₃ → -COONH (CH ₃ ) ₃ (3) (Four) Therefore, when the gel contains a deodorant, a reaction similar to the above formula occurs on the gel surface, and the deodorization reaction proceeds.

(Example) The content of the present invention will be described in more detail based on examples.

Example 1 (Formation of gel) Table 2 shows the gelation state when four types of sodium polyacrylate having different molecular weights and polyethylene glycol diglycidyl ether were used as the glycidyl ether. In addition, sample Nos. A and b in the table are comparative examples.

Further, in Table 2, the gelling condition was 55 ° C. × 24 hr.

As described above, the major advantage of the gel type deodorant is that the replacement time can be visually determined. That is, ideally, it is desirable to have no residue at the final stage, but this is not possible. Therefore, when a gelling agent is used, it is preferable to select a gel-forming substance that gels with a use amount as small as possible. Therefore, the conditions to be selected from the results in Table 2 are that the molecular weight is 40,000, 140,000 and 28.
This is the case when 0,000 sodium polyacrylate is used.

Example 2 The gelation state of gels using sodium polyacrylates having molecular weights of 40,000, 140,000 and 280,000 containing Epolione N-100 having excellent deodorizing ability in the deodorizing agents shown in Table 1 The results are shown in Table-3. Thus, gelling to form a gel and incorporation of a deodorant into the gel were performed simultaneously. As is clear from Table 3, if the content of the deodorant is increased, the gelation will not occur unless the amounts of sodium polyacrylate and polyethylene glycol diglycidyl ether are proportionally increased. Therefore, the target gel-type deodorant can be obtained by selecting the amount of deodorant according to the target odor intensity and further selecting the gelling conditions.

In Table 3, polyethylene glycol diglycidyl ether was used as the glycidyl ether, but instead of this, ethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, polyglycerol polyglycidyl ether, and glycerol polyglycidyl ether were used for gelation. As a result of observing and comparing the states, gelation was good in all cases.

Also, when ammonium polyacrylate was used instead of sodium polyacrylate, the same behavior as the sodium salt was exhibited, and a similar gel-type deodorant was obtained.

Example 3 The gel used in the deodorizing ability test was prepared under the condition of sample No. 5 and cut into a size of 2.0 g. 500 for the exam
Using a Erlenmeyer flask of ml, the odorous gas (ammonia, trimethylamine, hydrogen sulfide, and methyl mercaptan 4 kinds) and gel type deodorant (2.0 g) were put in the flask, and the relationship between the elapsed time and the deodorization rate The test temperature was 4 ° C. (the flask was left in the refrigerator), 25 ° C. (the flask was left indoors), and 50 ° C. (the flask was left in a constant temperature bath). The currently marketed product was subjected to a one-point test.
The gel prepared under the conditions of sample NO.i in Table-2 is sample NO.5.
The gel was cut into a size of 2.0 g in the same manner as the gel.

The deodorization rate for each odorous gas is as follows.

Deodorization rate for ammonia Deodorization rate for trimethylamine Deodorization rate for hydrogen sulfide Deodorization rate for methyl mercaptan From the series of deodorization test results described above, it is understood that the deodorizing ability of Sample No. 5 is extremely excellent. In addition, it can be seen from the result of the blank product that the nitrogen odor is easily absorbed in the gel, but the sulfur odor is hardly absorbed.

Example 4 The gel type deodorant of Sample No. 5 used in Example 3 was selected for the monitor test of a household refrigerator.

The monitor test conditions are as follows.

(1) Deodorant: Put 100 g of the gel type deodorant in a plastic container (diameter 60 mm), tightly stopper and remove the lid at the time of use.

(2) Target: Refrigerator for general household (200 l capacity) (3) Period: Continuous use for one month (4) Judgment method: Those who mainly use it (mostly housewives)
The effect is judged by the sensory sensation. Almost all households use some kind of deodorant in the refrigerator, but they were removed at the start of the test. Therefore, it can be compared with the products that have been used so far as the determination of the effect.

(5) Judgment Criteria: a ... (The effect is noticeable) b ... The odor was reduced.

 (Effects are recognized) c. (No effect) d ... The odor was strong.

(Negative effect or less effective than previously used deodorant) (6) Number of monitors: 30 Household test results are shown in Table-4.

As is clear from the results shown in Table 4, 80% or more of households have a deodorizing effect even after one month.

(Effect of the invention) The gel-type deodorant of the present invention contains a chemically reactive deodorant having an excellent deodorizing effect against various malodors in the gel, so that it can be used as a stationary deodorant for buildings, transportation, and the like. It is particularly useful for deodorizing living closed spaces or closed equipment such as in an engine.

Claims (1)

[Claims] 1. A betaine compound as an active ingredient, 2 to 30% by weight of sodium polyacrylate or ammonium polyacrylate having a molecular weight of 40,000 to 300,000, 1 to 10% by weight of diglycidyl ether or polyglycidyl ether. And 5 to 40% by weight of the chemical reaction type deodorant, wherein the balance is water.