DEODORANT DISPERSION, DEODORANT-CONTAINING PROCESSING SOLUTION, AND METHOD FOR PRODUCING DEODORANT PRODUCT

Abstract

The deodorant dispersion of the present invention includes (A) two or more powdery inorganic chemical adsorbents, (B) a dispersing agent, and (C) a dispersion medium, a content proportion of the component (A) is in a range from 10% to 30% by mass based on a total of the deodorant dispersion, a content proportion of the component (B) is in a range from 1% to 10% by mass based on a total of the deodorant dispersion, and a median particle diameter of a dispersoid is in a range from 0.1 m to 0.4 m. A gas adsorption capacity of the component (A) is preferably 25 mL/g or more.

Claims

1: A deodorant dispersion comprising: (A) two or more powdery inorganic chemical adsorbents, (B) a dispersing agent, and (C) a dispersion medium, wherein a content proportion of the component (A) is in a range from 10% to 30% by mass based on a total of the deodorant dispersion, wherein a content proportion of the component (B) is in a range from 1% to 10% by mass based on a total of the deodorant dispersion, and wherein a median particle diameter of a dispersoid is in a range from 0.1 m to 0.4 m.

2: The deodorant dispersion according to claim 1, wherein a gas adsorption capacity of the component (A) is 25 mL/g or more.

3: The deodorant dispersion according to claim 1, wherein at least one of the inorganic chemical adsorbents constituting the component (A) is an amorphous substance.

4: The deodorant dispersion according to claim 1, wherein the component (A) comprises a compound represented by a formula (1):
aM.sup.1.sub.2O.bM.sup.2O.cM.sup.3.sub.2O.sub.3.dM.sup.4O.sub.2.eP.sub.2O.sub.5.fH.sub.2O(1) wherein M.sup.1 represents an alkali metal atom, M.sup.2 represents a bivalent metal atom, M.sup.3 represents a trivalent metal atom, M.sup.4 represents a tetravalent metal atom, at least one of a, b, c, d and e is a positive number and the rest of a, b, c, d and e are each 0 or a positive number, and f is a positive number.

5: The deodorant dispersion according to claim 4, wherein M.sup.1.sub.2O in the formula (1) is Na.sub.2O.

6: The deodorant dispersion according to claim 4, wherein M.sup.2O in the formula (1) is MgO, ZnO or CuO.

7: The deodorant dispersion according to claim 4, wherein M.sup.3.sub.2O.sub.3 in the formula (1) is Al.sub.2O.sub.3.

8: The deodorant dispersion according to claim 4, wherein M.sup.4O.sub.2 in the general formula (1) is SiO.sub.2, TiO.sub.2 or ZrO.sub.2.

9: A deodorant containing processing solution comprising the deodorant dispersion according to claim 1, and an adhesive agent.

10: A production method of a deodorant product, comprising: a process for applying the deodorant containing processing solution according to claim 9 on a base material, and a process for drying a coated article.

Description

EXAMPLES

[0074] Hereinafter, the present invention will be described in more detail with reference to Examples, but is not limited to these Examples. It is to be noted that % refers to % by mass.

1. Production and Evaluation of Deodorant Dispersions

[0075] Deodorant dispersions were produced using the following raw materials.

1-1. Inorganic Chemical Adsorbent Powders

[0076] Inorganic chemical adsorbent powders shown in Table 1 were used.

TABLE-US-00001 TABLE 1 Specific Gas adsorption surface capacity area Compound Inorganic chemical adsorbent powder (m.sup.2/g) Name (mL/g) Amorphous sodium aluminum silicate 220 Ammonia 40 Amorphous aluminum silicate A 250 Ammonia 40 B 220 Ammonia 40 C 240 Ammonia 40 Amorphous magnesium silicate 130 Ammonia 25 Amorphous aluminum phosphate 130 Ammonia 70 Amorphous aluminum zinc oxide A 80 Hydrogen 85 sulfide Acetic acid 33 B 90 Hydrogen 85 sulfide Acetic acid 32 Amorphous magnesium aluminate 90 Acetic acid 31 Amorphous zirconium hydroxide 35 Acetic acid 28 Amorphous copper silicate 280 Acetic acid 25 Hydrogen 85 sulfide Amorphous silica 330 Ammonia 25 Amorphous titanium oxide A 90 Ammonia Acetic acid 27 B 70 Ammonia 70 Acetic acid 5 Crystalline titanium oxide 6 Acetic acid 5 Crystalline aluminum silicate 240 Ammonia 20 Crystalline aluminum zinc oxide 11 Acetic acid 5 Hydrogen 15 sulfide Crystalline titanium phosphate 15 Ammonia 155

1-2. Dispersing Agent

(1) Polycarboxylic Acid-Based Dispersing Agent

[0077] Nopcosperse 44-C (trade name) manufactured by San Nopco was used.

(2) Higher Alcohol Alkylene Oxide-Based Dispersing Agent

[0078] NOIGEN LF-202N (trade name) manufactured by DKS Co. Ltd. was used.

1-3. Dispersion Medium

[0079] Water was used.

Examples 1-1 to 1-6 and Comparative Examples 1-1 to 1-9

[0080] The inorganic chemical adsorbent powder(s), the dispersing agent, and water were mixed based on formulations shown in Tables 2 and 3, and the mixtures were subjected to wet pulverization using a bead mill to obtain deodorant dispersions (D1) to (D15). The color, median diameter, viscosity, and storage stability of the obtained deodorant dispersions were evaluated by the following methods. The results are shown in Tables 2 and 3.

(1) Specific Surface Area of Inorganic Chemical Adsorbent Powder

[0081] The surface area per gram of the inorganic chemical adsorbent powder was measured with a BET specific surface area meter.

(2) Gas Adsorption Capacity of Inorganic Chemical Adsorbent Powder

[0082] At about 20 C., the inorganic chemical adsorbent powder was placed in a test bag (inner volume: 4 L) made of a vinyl alcohol-based polymer, the test bag was sealed, and 3 L of an odor gas (ammonia gas, acetic acid gas, or hydrogen sulfide gas) of 100 to 1000 ppm was introduced into the sealed test bag. Then, immediately after the introduction of an odor gas and after two hours, the concentration of the odor gas remaining in the test bag was measured. A time at which the residual gas concentration was 1/10 or more of the initial gas concentration was determined to be a breakpoint with respect to deodorizing performance, and then the difference between the residual gas concentration at this time and the total sum of the initial gas concentrations was used to determine the total volume of the gas adsorbed by the adsorbent powder. The total adsorbed gas volume (mL) was divided by the amount (g) of the inorganic chemical adsorbent powder used in the test to determine a gas adsorption capacity (mL/g).

(3) Median Particle Diameter of Dispersoid in Dispersion

[0083] The dispersion as a sample was subjected to a measurement with a laser diffraction particle size distribution analyzer MS 2000 (model name) manufactured by Malvern Instruments Ltd., and the median particle diameter D50 of a dispersoid contained in the deodorant dispersion was analyzed on a volume basis.

(4) Viscosity of Deodorant Dispersion

[0084] B-type viscometer was used to measure the viscosity of the deodorant dispersion at a temperature of about 20 C.

(5) Storage Stability of Deodorant Dispersion

[0085] One liter of the deodorant dispersion placed in a polyethylene bottle was stored in a thermostat at a temperature of 50 C. for 1 month. After the storage, the polyethylene bottle was shaken by hand to evaluate storage stability according to the following criteria: redispersibility was excellent and viscosity was increased less than two times; and x viscosity was increased two times or more or the deodorant dispersion was not redispersed.

TABLE-US-00002 TABLE 2 Deodorant dispersion Median particle Viscos- Storage Inorganic chemical adsorbent Dispersing agent Water diameter ity stabil- Type Parts Type Parts Parts Type Color (m) (cPs) ity Example 1-1 Amorphous sodium aluminum silicate 10 Polycarboxylic 5 75 D1 White 0.21 330 Amorphous titanium oxide 5 acid-based Amorphous aluminum zinc oxide 5 1-2 Amorphous magnesium silicate 16 Higher alcohol 5 60 D2 White 0.25 880 Amorphous zirconium hydroxide 8 alkylene Amorphous aluminum zinc oxide 4 oxide-based 1-3 Amorphous aluminum silicate 8 Higher alcohol 7 69 D3 Light 0.33 600 Amorphous aluminum zinc oxide 16 alkylene yellow oxide-based 1-4 Amorphous aluminum phosphate 8 Higher alcohol 8 68 D4 Light 0.19 580 Amorphous copper silicate 16 alkylene blue oxide-based 1-5 Amorphous aluminum silicate 8 Higher alcohol 8 68 D5 White 0.24 680 Amorphous magnesium aluminate 8 alkylene Amorphous aluminum zinc oxide 8 oxide-based 1-6 Amorphous silica 8 Higher alcohol 5 71 D6 Light 0.30 710 Amorphous aluminum zinc oxide 16 alkylene yellow oxide-based

TABLE-US-00003 TABLE 3 Deodorant dispersion Median particle Viscos- Storage Inorganic chemical adsorbent Dispersing agent Water diameter ity stabil- Type Parts Type Parts Parts Type Color (m) (cPs) ity Comparative 1-1 Amorphous aluminum silicate 4 Higher alcohol 2 90 D7 White 0.19 250 x Example Amorphous aluminum zinc oxide 4 alkylene oxide-based 1-2 Amorphous aluminum silicate 8 Higher alcohol 4 72 D8 White 0.80 310 x Crystalline titanium oxide 16 alkylene oxide-based 1-3 Crystalline aluminum silicate 8 Higher alcohol 4 72 D9 White 1.20 450 x Crystalline aluminum zinc oxide 16 alkylene oxide-based 1-4 Amorphous titanium oxide 24 Higher alcohol 4 72 D10 White 0.90 230 alkylene oxide-based 1-5 Amorphous aluminum silicate 20 Higher alcohol 8 57 D11 White 0.06 2200 x Amorphous aluminum zinc oxide 15 alkylene oxide-based 1-6 Amorphous magnesium silicate 8 None 0 76 D12 White 0.55 330 x Amorphous zirconium hydroxide 16 1-7 Amorphous magnesium silicate 12 Higher alcohol 10 54 D13 White 0.06 2200 x Amorphous zirconium hydroxide 24 alkylene oxide-based 1-8 Amorphous magnesium silicate 8 Polycarboxylic 4 72 D14 White 2.30 210 x Amorphous zirconium hydroxide 16 acid-based 1-9 Crystalline titanium phosphate 20 Polycarboxylic 4 76 D15 White 0.60 180 x acid-based

[0086] As is apparent from Table 2 and Table 3, when the deodorant dispersion has an inorganic chemical adsorbent content of a range from 10% to 30% and a median particle diameter of the dispersoid of a range from 0.1 m to 0.4 m, excellent storage stability is obtained.

2. Production and Evaluation of Deodorant Containing Processing Solutions and Deodorant Products

Examples 2-1 to 2-6 and Comparative Examples 2-1 to 2-10

[0087] The deodorant dispersions (D1) to (D15) obtained in Examples 1-1 to 1-6 and Comparative Examples 1-1 to 1-9, the following emulsion binders (E1) to (E4), and water were mixed to prepare deodorant containing processing solutions whose inorganic chemical adsorbent concentration was 2% (see Table 4). Subsequently, each of the deodorant containing processing solutions was applied to a polyester cloth having a basis weight of 200 g/m.sup.2 such that the deodorant was spread in an amount of 2 g/m.sup.2, and the coated cloth was dried (105 C.) to obtain a polyester deodorant cloth. Then, the thus obtained polyester deodorant cloth was subjected to the following deodorant test and washing test. In Comparative Example 2-10, the deodorant test and the washing test were performed on the polyester cloth before the spreading process. These results are shown in Table 4.

<Emulsion Binders>

[0088] (E1) Silicone emulsion KM-2002L-1 (trade name) manufactured by Shin-Etsu Chemical Co., Ltd.
(E2) Acrylic emulsion NK Binder R-5NH (trade name) manufactured by Shin Nakamura Chemical Co., Ltd.
(E3) Urethane emulsion Newcoat UR-300Z (trade name) manufactured by Shin Nakamura Chemical Co., Ltd.
(E4) A mixture of (E1) and (E3) in a mass ratio of 1:2

(1) Deodorant Test

[0089] The polyester deodorant cloth (10 cm10 cm) was placed in a test bag made of a vinyl alcohol-based polymer film, 3 L of air containing 30 ppm of acetic acid, 100 ppm of ammonia, and 8 ppm of hydrogen sulfide was introduced into the test bag, and the test bag was sealed. After 2 hours, the concentration of each of the gases was measured using a gas detector tube. At the same time, a blank test was performed in the same manner as described above except that the polyester deodorant cloth was not placed in the test bag. A deodorant level was calculated by taking the concentration of the residual gas of the blank test as 100%.

(2) Washing Test

[0090] Water was placed in a washing tub of a washing machine, and the temperature of the water was set to 40 C. Then, a nonionic detergent was added in an amount of 0.54 g per liter of water to prepare a solution for washing. Subsequently, the polyester deodorant cloth or the polyester cloth and a dummy cloth (cotton towel) were put into the washing tub at a bath ratio of 1:30. The size of each of the cloths is about 1000 cm.sup.2. Washing was conducted for 5 minutes, and the cloths were dehydrated with a dehydrator. Then, the cloths were rinsed with new water at ordinary temperature for 2 minutes at the same bath ratio. This process was regarded as one washing, and repeated 10 times. After that, the deodorant test described in (1) above was performed.

TABLE-US-00004 TABLE 4 Deodorant containing Deodorant processing Drying Deodorant level After 10 washings dispersion Emulsion solution temperature Acetic Hydrogen Acetic Hydrogen Type Parts *.sup.1 Type Parts *.sup.2 Type ( C.) Ammonia acid sulfide Ammonia acid sulfide Example 2-1 D1 100 E4 20 P1 100 100 100 100 100 100 91 2-2 D2 100 E4 35 P2 100 100 100 100 89 100 91 2-3 D3 100 E1 10 P3 100 100 100 100 100 100 100 2-4 D4 100 E4 10 P4 100 100 100 100 91 100 100 2-5 D5 100 E1 15 P5 100 100 100 100 80 92 91 2-6 D6 100 E2 20 P6 100 100 100 100 80 100 81 Comparative 2-1 D7 100 E3 10 P7 Air 100 100 100 56 62 61 Example drying 2-2 D8 100 E3 20 P8 100 100 58 20 53 40 11 2-3 D9 100 E3 20 P9 100 100 65 35 53 55 18 2-4 D10 100 E3 25 P10 50 89 35 10 65 32 0 2-5 D11 100 E3 30 P11 100 100 100 100 67 58 47 2-6 D12 100 E3 10 P12 100 100 100 20 55 45 11 2-7 D13 100 E4 10 P13 100 100 100 20 72 69 11 2-8 D14 100 E3 10 P14 100 100 100 20 35 35 5 2-9 D15 100 E4 10 P15 Air 100 5 0 22 5 0 drying 2-10 32 35 5 24 30 0 *.sup.1 An amount of inorganic chemical adsorbent. *.sup.2 A solid content of resin.

[0091] As is apparent from Table 4, the deodorant towels obtained using the deodorant containing processing solutions of Examples 2-1 to 2-6 had a high deodorizing effect on a complex odor of ammonia, acetic acid, and hydrogen sulfide, and a sufficient deodorizing effect of 80% or more was obtained even after 10 washings. On the other hand, in Comparative Examples 2-1 to 2-9, a deodorizing effect was significantly reduced by washing.

INDUSTRIAL APPLICABILITY

[0092] The deodorant dispersion of the present invention is suitable as a raw material of a deodorant containing processing solution for use in obtaining a deodorant product effective for a complex odor. Further, the method for producing a deodorant product of the present invention is suitable for producing deodorant products having excellent washing durability, such as deodorant products obtained by imparting a deodorizing effect to paper, woven fabrics, nonwoven fabrics, and polymer sheets or processed products thereof (e.g., clothes, interior accessories, nursing care products, medical products, filters, bags, shoes, building materials, and car interior materials).