JPS6068859A - Aromatic composition - 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 relates to room fragrance compositions. Specifically, the present invention relates to a paste-like fragrance that can emit a uniform fragrance over a long period of time and does not leave any unvolatilized fragrance at the end of use.

Traditionally, commercially available air fresheners can be roughly divided into solid types;
There are three types: solution type and spray type. Solid type fragrances, excluding sublimable solids such as parachlorobenzole, are often solidified using gelling agents such as carrageenan and agar (Japanese Patent Application Laid-Open No. 1204-1989).
6, Japanese Patent Publication No. 51-98337). The rate of volatilization of the fragrance in this type of fragrance is fast at the beginning of use, but
Due to the high gel strength, even if a considerable amount of solid matter remains in the later stages of use, the fragrance is solidified (encapsulated) inside the gel, so the volatilization of the fragrance is greatly reduced, or it does not volatilize at all and remains. was there.

On the other hand, in the case of solution-type fragrances, since they are low-viscosity solutions, they have the disadvantage that the liquid spills during use.
It is necessary to devise measures such as capping with porous material to allow only the fragrance vapor to escape. In addition, attempts have been made to add thickeners such as xanthan gum to solution-type fragrances to create a highly viscous solution, but in order to maintain the persistence of the fragrance, the container is often shaken or the fragrance is stirred. It is necessary and practically inconvenient (Special Publication No. 56-33104)
).

In addition, spray-type air fresheners require a special set of books and special manufacturing equipment, and have a major disadvantage in that they must be handled each time they are used.

Therefore, the present invention eliminates the drawbacks of these various types of indoor air fresheners, and without changing the original scent of the fragrance.
The present invention was achieved as a result of studies aimed at obtaining a fragrance that maintains a constant volatilization rate over a long period of time and does not leave any unvolatilized fragrance at the end of use.

That is, the present invention is a paste-like indoor air freshener composition characterized in that an absorbent material made of a thermally crosslinked carboxymethyl cellulose alkali metal salt is added to an air freshener whose main components are water and fragrance. The thermally crosslinked carboxymethyl cellulose alkali metal salt (thermally crosslinked CMC) of the absorbent material used in the present invention can be produced by a known method as described in JP-A-56-28755 and JP-A-58-104901. In other words, partially acid type carboxymethylcellulose in which free carboxylic acid groups and alkali metal carboxylic acid salts coexist is heated to 80 to 200°C to crosslink it. The characteristics of this thermally crosslinked CMC are its high water absorption and high water retention properties, and its ability to absorb hundreds of times its own weight in pure water and tens of times its own weight in water containing salt such as table salt, and under pressure. It is an absorbent material that can retain water even in the middle of the day.

The shape of the thermally crosslinked CMC used in the present invention may be powder, granule, lPj, or fibrous, and the amount added varies depending on the degree of polymerization and crosslinking of the crosslinked CMC, but the amount of the thermally crosslinked CMC used in the fragrance may vary depending on the degree of polymerization and crosslinking of the crosslinked CMC. The range is 3 to 15 F'I+IL%, preferably 1 to 5%.

The fragrance used in the present invention is not particularly limited,
Perfume-based, citrus-based, fruit-based, and other types of products can be used depending on the location of use, such as living room, kitchen, conference room, reception room, dining room, waiting room, and toilet. Also,
In the case of lipophilic fragrances, surfactants may be added as necessary to ensure uniform dispersion in water, and if necessary, lower alcohols, coloring agents, and sterilizers may be used as fragrance dissolving and dispersing agents. Agents, antifreeze agents, etc. may be added and blended.

The reason why the addition of thermally crosslinked CMC, which is a feature of the present invention, gives the fragrance good volatilization properties is considered as follows. That is, the J1%ft carboxylic acid group of partially acidified carboxymethyl cellulose alkali gold M salt (CMC) and the unreacted hydroxyl group in the nearby CMC molecules are dehydrated by high temperature heat treatment to form an ester/l/type. Since the crosslinked portion is insoluble in water, microscopically, the pasty fragrance of the present invention has a loose network structure intersected by water-insoluble ester crosslinks. Therefore, in the early and middle stages of use of this fragrance, the volatilization rate of water and fragrance is moderately suppressed due to the strong hydrophilicity and water retention properties of CMC due to the osmotic pressure effect, and furthermore, in the later stages of use, the rate of volatilization of water and fragrance is moderately suppressed. Unlike other cases, thermally crosslinked CMC has a loose network structure consisting of water-insoluble crosslinks, so it forms a porous film structure and does not inhibit the volatilization of the fragrance and water remaining inside, so it maintains a constant volatilization rate. It shows. In addition, the reason why the original scent of the fragrance, which is one of the features of the present invention, does not change is that the thermally crosslinked CMC itself does not cause any peculiar reaction with various fragrances. This is because the third substance of (1) and (1) is not added at all.

This will be explained below using examples.

Examples 1 to 3 and Comparative Example 1 Water 100. Add fragrance (perfume type) iog and 0.31 surfactant to li', and add 1 g of thermally crosslinked CMC (Example 1).
), 3g (Example 2), 6. ? (Example a) Addition t"C1
Each was stirred with a homomixer.

After that, each was placed in a precisely weighed container (opening area: 32 cA), reweighed, and left unsealed for about a month.
For comparison purposes, the same test was conducted on samples without the addition of heat-crosslinked CMC, in which weight changes due to volatilization of fragrance and water were measured, and the presence or absence of 5 fragrances was confirmed. (Comparative Example 1) Changes in the amount of M (volatilization ratio per 5 days relative to the total weight of the fragrance immediately after preparation) of these fragrances are shown in the table below.

As shown in the table above, it was confirmed that by adding highly absorbent thermally crosslinked CMC, the volatilization rate of fragrance and water could be significantly suppressed, and an effective fragrance could be emitted for 30 to 40 days. In addition, the situation of the residue after the test was that in both Examples 1 to 3, there was always a thin film of thermally crosslinked CMC that adhered to the container (S1), and the fragrance was completely (no residue remained in Comparative Example 2 and 3゜For comparison, we used carrageenan (Comparative Example 2) and agar (Comparative Example 3) in place of thermally cross-linked CMC in the formulation of Example 2, and prepared gel-like fragrances by dissolving them by heating and then cooling them. I did a volatilization test.

As a result, the residual amount (wt%) after 40 days was 6% in the case of carrageenan and sX in the case of agar, and both of these residues were in the form of a hard lump containing the flavoring agent, and the amount of the remaining amount was 6% in the case of carrageenan and sX in the case of agar. I could hardly feel any divergence.

patent applicant Daicel Chemical Industries, Ltd.

Claims (1)

[Claims] A fragrance composition characterized by adding an absorbent material made of a thermally crosslinked carboxymethylcellulose alkali metal salt to a fragrance whose main components are water and fragrance.