JP2003305111A - Deodorizing composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a deodorant usable without generating a feeling of physical disorder upon the contact with the body and especially effective for deodorizing an article around the body such as a diaper or the like. <P>SOLUTION: A deodorizing composition is prepared by compounding a metal salt of a fatty acid, an inorganic metal compound and a carbonyl compound with a styrene/maleic anhydride copolymer. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to deodorant compositions. More specifically, the present invention relates to a novel deodorant effective for deodorizing odors familiar to daily life such as dirt, body odor, and indoor odor.

[0002] In recent years, interest in environmental hygiene has increased with the improvement of living standards, and deodorization and deodorization have become major issues. As a method of reducing the malodorous components, a method of masking the odor with a strong fragrance, a physical method such as adsorption by a porous adsorbent such as activated carbon, alumina, zeolite, a catalytic combustion method, an oxidation method by ozone ,
A chemical method such as a neutralization method using a chemical agent, or a biochemical method such as decomposition by bacteria is known.

At present, as deodorants for personal use, there are liquid deodorants by spraying, deodorants used in the form of gel or particles installed indoors. However, the most frequently used water-soluble liquid deodorant wets the surroundings and stains clothes, and is not preferable for care products such as colostomy or diapers that touch the skin or clothes. Further, both the sheet in which the deodorant is impregnated and the activated carbon sheet have a sticky feeling, and the activated carbon sheet has no effect on the smell of ammonia.

As described above, none of the conventional deodorants has satisfactory performance. Further, familiar malodors that are actually a problem in daily life are composed of various components such as acidic odor and basic odor, and it is necessary to realize an effective deodorant against any of these malodorous components.

[0005]

OBJECT AND SUMMARY OF THE INVENTION An object of the present invention is to use a deodorant which is solid at room temperature and does not cause stickiness or pollution even if it touches the body, and can be used without any uncomfortable feeling, and has an excellent deodorizing ability. In particular, it is to provide a deodorant composition that is effective for deodorizing diapers and the like. As a result of various studies to solve the above-mentioned problems, the present inventors used a specific maleic anhydride-based copolymer, and further excellent fatty deodorant by combining a fatty acid metal salt and an inorganic metal compound. The present invention has been completed based on the knowledge that an effect can be obtained.

The present invention provides structural units of the following formulas (1) and (2):

[Chemical 2] The present invention provides a deodorant composition comprising a copolymer having the formula (1) as an active ingredient. The deodorant of the present invention preferably contains a fatty acid metal salt and / or an inorganic metal compound,
Further, it is preferable to add a carbonyl compound.

[0007]

DETAILED DESCRIPTION OF THE INVENTION (a) Styrene-maleic anhydride copolymer The copolymer used as an active ingredient of the deodorant of the present invention comprises the following structural units (1) and (2):

[0008]

[Chemical 3] Is a maleic anhydride-based copolymer having The weight average molecular weight of this styrene-maleic anhydride copolymer was 1,
000 to 20,000, preferably 1,000 to 10,000
00.

This copolymer is a solid such as powder and can be formed into a film or coated on a fibrous material such as a non-woven fabric. A typical example of such a styrene-maleic anhydride copolymer is SMA-
SMA resins such as 1000 (manufactured by Elf Atchem Japan Co., Ltd.) and other commercial products are known. Although such polymer compounds have been conventionally known, no deodorant having such deodorant action and deodorant having this as an active ingredient is known.

(B) Fatty Acid Metal Salt In another invention of the present application, a fatty acid metal salt is used in combination with the copolymer. As such a fatty acid metal salt,
A saturated or unsaturated fatty acid metal salt having 1 to 30 carbon atoms is used. Such fatty acid metal salts include acetic acid, propionic acid, undecylenic acid, palmitic acid, lauric acid, myristic acid, palmitic acid, stearic acid, saturated fatty acids such as behenic acid; or oleic acid, sorbic acid, linoleic acid, linolenic acid, Metal salts of unsaturated carboxylic acids such as ricinoleic acid and arachidonic acid are preferred.

In the present invention, these fatty acids, divalent or trivalent compounds are used.
Metal salts with valent metals are used, such as zinc, copper, iron,
Examples thereof include metal salts such as molybdenum, cobalt, aluminum, titanium, manganese, nickel and silver. Of these, zinc salts and aluminum salts are particularly preferable. The amount of the fatty acid metal salt compounded is 1 to 120 parts by weight, preferably 2 to 50 parts by weight, based on 100 parts by weight of the styrene-maleic anhydride copolymer.

(C) Inorganic Metal Compound In the present invention, an inorganic metal compound may be combined with the copolymer instead of or in combination with the fatty acid metal. Examples of the inorganic metal compound include oxides, hydroxides and inorganic metal salts of metals such as calcium, magnesium, zinc, aluminum, copper, iron and titanium. Therefore, as the oxide, CaO, MgO, A
l ₂ O ₃ , ZnO, CuO, Cu ₂ O, FeO, Fe ₂
O ₃ , TiO ₂ ; hydroxides such as Ca (OH) ₂
Examples of the inorganic metal salt include chlorides, sulfates and nitrates of the above metals. Of these, preferred are specifically ferrous sulfate, iron hydroxide, zinc hydroxide, titanium hydroxide, zinc hydroxide, titanium hydroxide, copper sulfate, copper nitrate, copper hydroxide, titanic acid, etc. Is mentioned. The blending amount of such an inorganic metal compound is 1 to 200 parts by weight, preferably 2 to 100 parts by weight, based on 100 parts by weight of the copolymer.

(D) Carbonyl compound In still another invention of the present application, a carbonyl compound such as ketocarboxylic acid or aldehyde acid is used in combination with the above copolymer. Examples of such a carbonyl compound include glycerin aldehyde, pyruvic acid, levulinic acid, aldehyde nonanoic acid, glyoxylic acid, and aldehyde acid. The compounding amount of the carbonyl compound is 1 to 200 with respect to 100 parts by weight of the styrene-maleic anhydride copolymer.
Parts by weight, preferably 5 to 80 parts by weight.

In the deodorant of the present invention, the above-mentioned copolymer exhibits excellent adsorbing power and deodorizing effect mainly to substances causing odor around the body such as amines and decomposition products thereof such as ammonia. On the other hand, fatty acid metal salts, inorganic metal compounds, and carbonyl compounds absorb sulfur-based malodorous substances such as hydrogen sulfide and mercaptan. Therefore, for most odor-causing odors such as amine compounds,
Even if only the styrene-maleic anhydride copolymer is used, a sufficient deodorizing effect can be obtained. Further, it is preferable to use the deodorant of the present invention in which a fatty acid metal salt, an inorganic metal compound or a carbonyl compound is used in combination as the malodor causing substance having a large amount of sulfur malodor. As described above, it is presumed that both the nitrogen-based and sulfur-based odors can be reliably removed by using the copolymer in combination with the fatty acid metal salt or the like.

In the production of the deodorant composition, the solvent used for mixing the styrene-maleic anhydride copolymer, the fatty acid metal salt, the inorganic metal compound, the carbonyl compound, etc., which are the deodorant components, dissolves these. There is no particular limitation so long as it is dimethylformamide, dimethylsulfoxide, water and the like. The amount of these solvents used is preferably 2 to 50 parts by weight with respect to 1 part by weight of the deodorant component.

The deodorant composition of the present invention further contains various adhesive materials for adjusting the texture and appearance, or for adhering to and applying to a substrate composed of a sheet-shaped or thread-shaped molded product. You may. As such a compound, an appropriate polymer compound can be used, and examples thereof include vinyl acetate-acrylic copolymer, polyvinyl alcohol, urethane resin, ethylene-vinyl acetate copolymer, and carboxymethyl cellulose. . These may be used alone or in combination. The blending amount of these adhesives is preferably 10 to 200 parts by weight with respect to 100 parts by weight of the deodorant component.

In actual use, the deodorant composition is applied or impregnated as a layer on a substrate having various shapes to increase the surface area of the deodorant composition to improve the deodorant effect. Is preferred. As such a base material, a non-woven fabric
(Cotton, rayon, polypropylene, polyethylene, polyester, acrylic fiber), woven fabric, yarn, fibrous material such as monofilament, granular material, paper or zeolite, sepiolite, diatomaceous earth, porous material such as activated carbon etc. alone , Or a combination thereof, and particularly, a nonwoven fabric made of cotton is preferable because it has good hygroscopicity. In addition, in the case of paper-like material, it is preferable to use a porous material and pulp together.

The amount of the deodorant composition used is 100
0.1 to 50 parts by weight, preferably 10 to 10 parts by weight
20 parts by weight. The amount of the deodorizing composition applied or impregnated on these base materials is about 0.1 to 100 g / m ^{2 in} the case of a sheet when expressed in terms of area ratio. Also, filamentous,
In the case of granules (powder), 0.1 to 50% by weight with respect to the base material
It is a degree.

The deodorant composition may be incorporated into a nonwoven fabric or paper. The mixing ratio of the deodorant component to the non-woven fabric and the paper is 0.1 to 50 parts by weight, preferably 1 to 20 parts by weight with respect to 100 parts by weight of these. If it is less than this range, the deodorizing effect cannot be obtained, and if it is more than this range, it is difficult to manufacture nonwoven fabric and paper.

The material of paper is preferably pulp, and the proportion of pulp or linter in the whole paper is 50 to 99% by weight. Nonwoven fabric is pulp
Cotton, polyethylene, polypropylene, acrylic,
A material such as rayon is preferable, and one containing at least 30% by weight of pulp and cotton is preferable. In this way, the odor can be comfortably removed without wetting the futon as in the conventional liquid deodorant.

Another form of the actual use of the deodorant composition is to disperse or mix it in various polymer compounds, or to dissolve it into a polymer blend by mutual dissolution with a base polymer, and to form a mixture of the mixture into a sheet, It may be formed into a film or the like.

For example, 0.01 to 30 parts by weight, preferably 0.1 to 6 parts by weight, is added to 100 parts by weight of an olefin polymer such as polyethylene or polypropylene, and the mixture is molded by a known method. It should be a film. If the compounding amount of the deodorant composition is less than this, the desired deodorizing effect cannot be obtained, while if it is more than this, the resins do not dissolve each other and it is difficult to form a film. When dust and dirt are put in a bag made of such a film and sealed, when an odor-causing substance permeates the film from the contents, it is absorbed and decomposed by the deodorant in the film, and a bad odor is not released to the outside. Such a film is particularly useful as a dust bag, a waste bag, a deodorant bag for a diaper after use, a bag for storing raw food such as fish.

(Production Method) In order to produce the deodorant of the present invention, first, a predetermined amount of styrene-maleic anhydride copolymer,
Further, a fatty acid metal salt, an inorganic metal compound, etc. are mixed in a solvent and dissolved by heating. Next, if necessary, an adhesive such as a vinyl acetate-acrylic copolymer emulsion is added and uniformly mixed to obtain a solution of the deodorant composition. This solution is impregnated into a sheet-shaped or thread-shaped substrate or applied, and then heated and dried to obtain a deodorant.

[0024]

EXAMPLES Next, the present invention will be described more specifically based on examples.

[Example 1] 45 g of pulp, styrene-maleic anhydride copolymer (Elf Atchem Japan
(Co., Ltd .: SMA-1000) 5 g, polyvinyl alcohol 0.1 g, zinc oxide 0.9 g and polyethylene oxide 0.9 g were added to 10 L of water, and dispersed by stirring with a mixer. Then, papermaking was performed using a papermaking machine. The sample was dried to give 50 g / m ² of paper.

[Examples 2 to 4] Paper was produced in the same manner as in Example 1 except that the components and compositions shown in Table 1 were used.

(Test) Ammonia 50 in a test container (1 L)
0 ppm and 50 ppm of hydrogen sulfide were enclosed, and the test paper obtained in the example was put as a deodorant test piece (10 cm × 10 cm) and sealed. When the gas concentration in the test container after each elapsed time (0 to 120 minutes) was measured, it was as shown in Table 1.

[0028]

[Table 1]

[Example 5] Styrene-maleic anhydride copolymer (manufactured by Elf Atchem Japan Co., SMA-1)
000) 20 g, zinc oxide 2 g, polyethylene-vinyl acetate copolymer 20 g and polyethylene 958 g were mixed and dispersed into a kneader, and the mixture was heated and dissolved at 180 ° C. to obtain a film (thickness 50 μm) by an inflation method. A bag (10 × 10 cm) was prepared using this film. 2m of 1 / 10mol ammonia water on filter paper (5x5cm)
What was impregnated with 1 was put in the above bag, sealed, and then sealed in a 5 L glass bottle. When the ammonia concentration in the glass bottle was measured after a predetermined time, it was as follows.

[0030]

[Table 2]

[Examples 6 to 12] An inflation film was molded in the same manner as in Example 5 except that the base resin and the deodorant component were used according to the compositions shown in Table 3 below, and the ammonia concentration in the glass bottle was measured. Evaluated.

[0032]

[Table 3]

[0033]

EFFECTS OF THE INVENTION The deodorant of the present invention is a solid and can be used without feeling uncomfortable without causing stickiness or contamination even if it touches the body. In particular, it is a deodorant that can comfortably absorb the bad odors around you such as diapers, and can be mixed with the base resin of a garbage bag to obtain an inexpensive and high-performance deodorant bag.

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Claims (7)

[Claims] 1. Structural units of the following formulas (1) and (2): A deodorant composition comprising a copolymer having the formula (1) as an active ingredient. 2. The deodorizing composition according to claim 1, further comprising a fatty acid metal salt and / or an inorganic metal compound. 3. The deodorant composition according to claim 2, wherein the metal salt is a zinc salt. 4. The deodorant composition according to claim 1, which further comprises a carbonyl compound. 5. Further comprising at least one polymer compound selected from vinyl acetate-acrylic copolymer, polyvinyl alcohol, urethane resin, ethylene-vinyl acetate copolymer and carboxymethyl cellulose. Item 4. A deodorant composition according to any one of items 1 to 4. 6. A deodorant obtained by adhering the deodorizing composition according to any one of claims 1 to 5 to a substrate made of fibrous material, granular material, paper, non-woven fabric, woven cloth or porous material. 7. A polymer film containing the deodorizing composition according to claim 1.