JPH0687889B2 - Washing-resistant deodorant and its manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel deodorant and a method for producing the same, and more particularly to a deodorant that is rich in quick-acting and long-lasting and has wash resistance, and a method for producing the same.

The living environment that surrounds us has many sources of offensive odors and gives us discomfort and dislike.

This malodor has been called three major pollutions along with noise and vibration, and it has been seriously concerned and legally regulated so as to actively eliminate it. However, these have not penetrated into the actual living environment around us.

The present invention is intended to eliminate a small foul odor generated at home from a broadly defined foul odor.

In general, extinguishing a bad odor is usually expressed as deodorization or deodorization, but in a broad sense, it is understood as the same meaning and is referred to as deodorization here.

At present, observing the odors around us, we find sweaty underwear, socks, bedding, cigarette-smelling outerwear, diapers, sheets, closets, clogs, locators, meeting rooms, toilets, refrigerators, and trash cans. , Pets, incubators, and so on.

Conventionally, the most popular method for removing these odors is the adsorption method using activated carbon. This activated charcoal, which is a powdery charcoal, has restrictions in handling, and also has restrictions in use such as its effectiveness disappearing when it absorbs water.

Under such circumstances, the investigation of the chemical components of odor has progressed, and a new deodorizing method corresponding to this has been found. That is, when categorized from the mechanism, (1) a method of removing by adsorption, (2) a method of decomposing and removing, and (3) a method of deodorizing by chemical reaction. Furthermore, when classifying from the form used,
(1) Aerosol type, (2) Liquid type, (3) Powder granule type, etc.

With these combinations, a deodorant or deodorant according to the purpose is produced. Here, the deodorant is used as a single form by diluting a deodorizing component with another gas, a liquid or a solid substance, whereas a deodorant is a deodorant in these forms such as fiber. It is to be defined as being used in the form of being supported and fixed to a sheet-like material or a plastic sheet-like article.

As mentioned above, so-called deodorant has been permeated and used in industrial materials and household products as much as activated carbon.

When used as an industrial material, it is common knowledge that a large amount of it is used and recycled, but in household products, such a concept has never existed.

As a result of intensive studies to develop a better method of utilizing the deodorant, the present inventors have shown that the deodorant itself has excellent durability and washing resistance and can be easily recycled without impairing the rapid effect of the deodorant itself. The inventors have succeeded in developing a deodorant having a remarkable effect and a manufacturing method thereof, and have reached the present invention.

That is, the deodorant according to the present invention is one in which the guest is the deodorant as the inclusion of the polyurethane porous film layer in which the inclusion is the deodorant as the guest is dispersed and carried on the support. It is preferably produced by mixing and dispersing the product in the form of powder in a polyurethane resin solution, applying this to a support, and then subjecting it to a solvent removal treatment or a foaming treatment to form a porous film layer.

The deodorant used in the present invention is appropriately selected from known deodorants. The deodorant may belong to any of the above-mentioned mechanisms as long as it can form a clathrate as a guest, but a chemical reaction type deodorant is most preferable. This chemical reaction type is various reactions defined in the field of chemistry such as neutralization, oxidation, addition, condensation, etc., and various deodorants such as iron compounds, aluminum compounds, tree extracts, tea extracts, etc. Are known.
Further, the chemical reaction type has a feature that it can be used in combination with an adsorption-removal type and a decomposition-removal type, and has an effect of deodorizing ability, stability, ease of use, and the like as well as an effect of expanding the range of use by combined use. The combined use of activated carbon and the like is usually preferable in order to enhance the deodorizing power.

In the present invention, it is essential to combine the deodorant as a guest compound with the polyurethane in the form of an inclusion complex, but the host compound which is one of the components forming the inclusion complex also has a known inclusion complex formation property. Selected from host compounds. Specific examples include crystalline cellulose, cyclodextrin, silica micro beads, acrylic balloons and the like. 5A
It is desirable that the guest compound having a pore size of ° to 1 µ and the clathrated guest compound not being easily released by water or a solvent, and especially cyclodextrin shows an excellent effect in the present invention.

In addition, an appropriately known method can be applied to the production of the clathrate. Usually, the mixed and clathrate mixture obtained from the saturated aqueous solution method or the kneading method is dried and pulverized by freeze-drying, ventilation drying, spray drying or vacuum drying to obtain a powdery clathrate.

This shape includes spherical powder, powdery material, dendritic material, flaky powder, horny powder, spongy powder, irregularly shaped powder and the like. In use, any shape may be used, but in order to define the size, spherical powder will be representatively shown here.
A diameter of 150 μm is suitable.

The clathrate thus obtained is dispersed in a film-forming polyurethane solution. A well-known polyurethane is appropriately used as the polyurethane. For the application of polyurethane and the subsequent foaming treatment, well-known foamed polyurethane label forming conditions can be appropriately adopted. As the foaming treatment, either a dry method or a wet method can be adopted, but the wet method is particularly preferable. In the wet method, the clathrate is added and kneaded to a viscous liquid consisting of an organic solvent of polyurethane, and the mixture is coated on a support and then passed through a coagulation bath such as water to resinify and foam. Is done. Even in the dry method, the progress of resinification and foaming are similar. In the process of resinification and foaming, gas escapes through the interface between the clathrate and the viscous liquid, resulting in interfacial separation between the clathrate and the polyurethane, and the pores of the porous polyurethane generated by the foaming. A film incorporating the clathrate is formed in such a manner that a part of the material adheres to polyurethane and a part of the material communicates with the outside through the hole. Incidentally, it may be preferable to add an appropriate amount of an insoluble solid having the same shape as the clathrate to the polyurethane solution, since this acts as a space forming auxiliary agent. Examples of the insoluble solid include inorganic particles such as titanium oxide and silicon oxide, metal particles such as copper and aluminum and fillers thereof, organic polymer compound particles such as fluorine and polystyrene resin, and fillers thereof. The size of the pores of the porous polyurethane is preferably in the range of 5-250μ.

In the present invention, the support may be appropriately selected depending on the purpose of use of the deodorant, etc., as long as it can withstand washing, dry cleaning and the like. Specific examples include films, sheets, papers, non-woven fabrics, mats, films, plastics, molded products, wood, woven fabrics, knitted fabrics, etc., but ordinary fiber products and plastic products are preferable. Of these, textile products are preferable.

As the method for applying the polyurethane solution to the support, usual methods such as coating, padding, spraying and impregnation are adopted. It may be applied only to the surface, or may be impregnated to the inside with a thick non-woven fabric or the like.

The ratio of each component in the deodorant of the present invention can be varied within a wide range, but usually the deodorant to the inclusion host compound is in a weight ratio.
Clathrate to polyurethane in a weight ratio of 0.01: 1 from 0.1: 1 to 1.5: 1
A range of up to 0.2: 1 is preferred.

FIG. 1 shows a sectional view of the deodorant body of the present invention.

The spherical particles 1 are clathrate particles in which a deodorant is included in a microporous body, and the film particles 2 are a polyurethane resin film layer. In addition, the space around the coating shows the communicating pores 3 of the resin porous body, and 4 shows the base material that becomes the support. Since the deodorant inclusions are randomly distributed and fixed inside and outside the polyurethane film, the deodorant is in a state of being easily contacted with the outside air.

The deodorant body of the present invention can be cut into a desired shape such as a granular shape or a ribbon shape depending on the purpose of use, while it can be laminated in a sandwich shape and can be sandwiched between other materials. You can also

The deodorant body of the present invention is derived from the above-mentioned specific structure, and its effect is stably maintained for a long period of time without impairing the rapid effect of the deodorant used, and is excellent in washing resistance. This washing resistance is accompanied by the effect that the deodorizing effect is regenerated by the washing treatment (laundry, dry cleaning), and the repeated washing treatment makes it possible to maintain the effect for a long period of time.

The deodorizing effect of the present invention was confirmed by checking ammonia gas (alkaline) and hydrogen sulfide gas (acidic), which are typical malodorous gases. The odor can be measured by a direct display method, an air dilution method as a sensory test method, or a gas chromatograph method, a detection tube method, and a colorimetric method as a chemical component measurement method. In the present invention, a check was performed using a Kitagawa detection tube.
That is, a fixed concentration of ammonia gas or hydrogen sulfide gas is injected into a 500 ml closed container, and 8 × 20 cm deodorant is put in at the same time.
The deodorant effect was checked economically by measuring the residual gas concentration with a gas detector tube. Gas detector tubes used were Gas Tech ammonia 3L and hydrogen sulfide 4LL manufactured by Kitazawa Sangyo Co., Ltd.

Washing was repeated 10 times according to JIS L217-103 method, and dry cleaning was repeated 10 times according to JIS L-1018E method.

Next, the method of the present invention will be described based on examples. These are one of the preferred embodiments, but the production method of the present invention is not limited to the exemplified methods.

Example 1 Cerdal NA (Shoko Chemical's deodorant) and Cerdex N
(Nippon Shokuhin Kako's host compound) was kneaded at a ratio of 1: 1 and then dried under reduced pressure to obtain a deodorant inclusion product. Next, 40 parts by weight of dimethylformamide was added to 8 parts by weight of this clathrate and sufficiently stirred, and further 100 parts by weight of Crisbon 8116 (urethane resin manufactured by Dainippon Ink and Chemicals) was added and stirred for 30 minutes to obtain a mixed solution. Next, this solution was applied to one side of a polyester non-woven fabric (100 g / m ² ) by a reverse coater so that the coating amount was 50 g / m ² (resin solid content conversion), and then immediately solidified in water for 5 minutes, and further 60 It was immersed in warm water at 0 ° C for 10 minutes, dehydrated with mangle, and dried at 120 ° C for 5 minutes to obtain a deodorant having a polyester nonwoven fabric as a support.

Comparative Example 1 The non-woven fabric used in Example 1 was dipped in a 20% aqueous solution of Cerdal NA (a deodorant manufactured by Shoko Chemical Co., Ltd.), squeezed with a mangle so that the squeezing rate was 120%, and dried at 120 ° C. for 5 minutes to remove the odor. An odor was obtained.

Comparative Example 2 Microporous inclusions containing the deodorant obtained in Example 1
10 parts by weight of toluene 20 parts by weight, Chris coat P1019 (Dainippon Ink Industries acrylic resin) 100 parts by weight, Chris Bonn NX (Dainippon Ink Industries isocyanate crosslinking agent) 1.5
A part by weight was added and stirred for 30 minutes to obtain a mixed solution. Next, after applying a reverse coater to one side of the non-woven fabric used in Example 1 so as to have a coating amount of 50 g / m ² (converted to resin solid content), 15
It was dried at 0 ° C for 30 minutes to obtain a deodorant product.

Using the deodorants obtained in the above Examples and Comparative Examples, the deodorizing effect on ammonia gas and hydrogen sulfide gas was measured. The results are shown in Tables 1 and 2.

Example 2 Asahi Guard AG-710 (fluorine-based water repellent manufactured by Asahi Glass) 5%
Nylon taffeta water-repellent treated with an aqueous solution (70d / 24f, Sutra 210
This product × 90 wefts) was treated in the same manner as in Example 1 to obtain a deodorant product.

Next, a mixed solution of 75 parts of polyester film (manufactured by Toray) and 30 parts by weight of toluene to 100 parts by weight of Crisbon 4070 (urethane resin manufactured by Dainippon Ink and Chemicals Co., Ltd.) was applied with a reverse roll coater at an application amount of 40 g / m ² (resin solid And then dried at 150 ° C. for 3 minutes.

Next, the porous film surface of the deodorant obtained above and the resin-coated surface of the polyester film are pasted together by passing them between a heat roll having a surface temperature of 130 ° C. and a heat roll consisting of a rubber roll, and then Nairona Taffeta By removing, an odor eliminating body having a polyester film as a support was obtained.

The deodorant obtained was used to measure the deodorizing effect on ammonia gas and hydrogen sulfide gas. The results are shown in Tables 3 and 4.

Example 3 Super Clean KS-YM-O (deodorant manufactured by Coconoe) and silica microbeads (host compound manufactured by Catalysts & Chemicals Industries) were used.
The mixture was kneaded at a ratio of 1: 1 and then dried under reduced pressure to obtain a deodorant clathrate. Next, to 6 parts by weight of this clathrate, 6 parts by weight of Egret AM-50 (Takeda Chemical Industries activated carbon) and 40 parts by weight of dimethylformamide were added, and further 100 parts by weight of Crisbon 8116 (polyurethane resin manufactured by Dainippon Ink and Chemicals). The mixture was added and stirred for 30 minutes to obtain a mixed solution.

Next, apply this solution to one side of nylon non-woven fabric (75 g / m ² ) with a reverse roll coater at a coating amount of 45 g / m ² (converted to resin solids)
Immediately after application, the product is solidified in water for 5 minutes, further immersed in hot water at 60 ° C for 10 minutes, dehydrated by mangle and dried at 120 ° C for 5 minutes, and the nylon non-woven fabric is used as the support. An odor was obtained. The deodorant obtained was used to measure the deodorizing effect on ammonia gas and hydrogen sulfide gas. The results are shown in Tables 5 and 6.

[Brief description of drawings]

FIG. 1 is a schematic enlarged cross-sectional view showing the structure of the deodorant body according to the present invention. 1 ... clathrate particles, 2 ... film layer, 3 ... communicating pores, 4
...... Substrate, 5 ... Porous film layer, 6 ... Support layer.

Claims (3)

[Claims] 1. A deodorant body comprising a support and a porous polyurethane film on which a clathrate, which is a deodorant, is dispersed and carried by a guest. 2. A first support according to claim 1, wherein the support comprises fibers.
Deodorant according to the item. 3. A clathrate in which a guest is a deodorant is mixed in a powder form in a polyurethane solution and dispersed, and this is applied to a support, and then foamed to form a porous film layer. Deodorant manufacturing method.