JP2832407B2 - Deodorant paint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention has excellent deodorizing power,
The present invention relates to a deodorant paint that can be widely used for household odors generated from homes and industrial odors generated from factories and the like.

[0002]

2. Description of the Related Art Along with the urbanization and diversification of living environment, interest in the smell around us has increased, and criticism of offensive odor has been particularly severe. Conventionally, as a deodorizing paint, a deodorizing and moisture-absorbing paint obtained by mixing and emulsifying zeolite fine powder with an emulsion paint (JP-A-50-322)
No. 33), an organic polycarboxylic acid and a binder resin, or a deodorizing paint obtained by adding a ferrous salt thereto (JP-A No. 61-151273) are known.

[0003] Among them, physical adsorption by zeolite or the like generally has a drawback that the adsorption capacity is limited and the adsorption power decreases relatively early. The method using a carboxylic acid or the like is effective for ammonia and amines, but is insufficient for a sulfur system such as mercaptan.

[0004] In order to improve this point, deodorizing paints for buildings containing an enzymatic deodorizing agent and a deodorizing agent containing phytontide as active ingredients (Japanese Patent Application Laid-Open No. 1-217083), titanium, aluminum, magnesium, calcium, silicon Deodorizing coating composition comprising agglomerated oxide particles containing zinc and at least one element selected from the group consisting of:
No. 2967), a deodorizing paint containing at least one selected from phosphoric acid, phosphorous acid, hypophosphorous acid, chloric acid, chlorous acid, hypochlorous acid or a salt thereof (Japanese Unexamined Patent Publication (Kokai) No. 2-3).
No. 05867), and a coating composition in which at least one acid selected from ascorbic acid and oxypolybasic acid or a salt thereof is bonded to manganese (II) ion (Japanese Patent Application Laid-Open No. Hei 3-12463). Have been.

Although the above deodorant paints have both improved deodorant capacity and selectivity of deodorant effect, they are still insufficient in that various malodorous components can be quickly deodorized to below the threshold of humans. Not something.

[0006]

DISCLOSURE OF THE INVENTION The present invention has an excellent deodorizing effect on various malodors, and has a high deodorizing speed.
An object of the present invention is to provide a deodorant paint having excellent durability.

[0007]

As a result of various studies, the present inventors have found that (a) an aluminosilicate and (b) an oxidizing agent are blended in a paint, and the aluminosilicate and the oxidizing agent are mixed. It has been found that a paint having an excellent deodorizing effect against various malodors can be obtained by setting the pigment volume concentration in the coating film including the pigment to 20 to 45%, thereby completing the present invention.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As the component (a) in the present invention, those having a three-component composition ratio expressed as an oxide having the following formula 2 are preferable.

[0009]

Embedded image (M represents at least one metal selected from zinc, copper, silver, cobalt, nickel, iron, titanium, barium, tin and zirconium, and n represents the valence of the metal)

The aluminosilicate of the component (a) is obtained as a white or light-colored powder, and has a water-soluble silicate, a water-soluble metal salt, a water-soluble aluminum salt and / or a water-soluble aluminum salt in an amount corresponding to the above composition ratio. It is produced by reacting a basic aluminate in the presence of water and heating the resulting precipitate in the presence of water as required.

As the oxidizing agent of the component (b), percarbonate,
Preferred are persulfates such as sodium persulfate, potassium persulfate, ammonium persulfate and potassium monopersulfate, and organic peracids such as hydrogen peroxide, diperoxidedecandioic acid and magnesium perphthalate, and salts thereof.

The deodorant paint of the present invention contains the above-mentioned components (a) and (b) as essential components. If necessary, both components may be mixed as powders or granules, or ( The component (b) is attached to the component (a), and the amphoteric components (a) and (b) are kneaded and granulated under the condition of holding the solvent.

[0013] In order to make full use of the capabilities of these deodorants, it is necessary that when a film is formed, its function is exhibited without hiding the deodorant by the binder.
For this purpose, the deodorant must always be brought into contact with the outside air in a porous coating state.
% To 45%, more preferably 3% to 45%.
5 to 42%. The pigment volume concentration is defined as ((a),
(Volume of pigment content in coating film including aluminosilicate as component (b)) / (total coating film volume).

That is, when the pigment volume concentration is less than 20%, the deodorant is concealed by the binder as described above, and the effect is reduced. On the other hand, when the pigment content is more than 45%, the brittleness of the coating film which cannot be practically used is unbearable. Is not preferred.

(A) The aluminosilicate and the (b) oxidizing agent are (a) / (b) = 1/99 to 99.9 / by weight ratio.
0.1, more preferably 50/50 to 99.5 / 0.5
It is preferable to coexist in the range of.

As the binder resin, a urethane resin, an acrylic resin, a vinyl acetate resin, or the like is suitable, but any of the resins used for various other paints can be used alone or in combination.

As the solvent or dispersion medium, alcohol,
Ketones, esters, ethers, aliphatic hydrocarbons, aromatic hydrocarbons, other organic solvents, or mixed solvents thereof can be used, but are not particularly limited.

The compounding method may be either at the time of or after the preparation of each coating agent.
It is preferable to mix and disperse sufficiently uniformly by a mixing means such as a roll, a sand mill, an attritor, a kneader or the like.

[0019] In forming the coating, a molecular sieve is used so that the deodorant is uniformly distributed in the formed coating film.
It is desirable to mix . In addition, it is optional to add organic or inorganic coloring pigments, extender pigments, thickeners, film-holding colloid agents, film-forming assistants, defoamers, dispersants, and other additives that are usually used in paints.

However, the auxiliary pigment having a function of remarkably improving the deodorizing effect according to the present invention has a flaky shape such as talc, which relieves the shrinkage stress of the coating film and improves the water resistance, and Those having a large oil absorption are desirable.

[0021]

The deodorizing mechanism of the deodorant paint of the present invention is not clear, but it is considered that physical adsorption proceeds at a very high speed until equilibrium adsorption, followed by a chemical reaction. That is, by combining the aluminosilicate of the component (a) and the oxidizing agent of the component (b), the speed at which malodor is adsorbed to the aluminosilicate having a large specific surface area and the chemical reaction due to the adsorbed malodorous oxidizing agent are improved. It is thought that they act synergistically and deodorize more effectively.

Further, by controlling the pigment volume concentration in the coating film within an appropriate range, the deodorant base can be effectively deodorized without being hidden by the binder resin in the coating film.

Further, the malodor caught by the adsorption and the chemical reaction is no longer a odor and is not released again, so that the odor, which is a drawback of deodorization by physical adsorption, is suppressed, and the deodorizing effect is reduced. It is considered that the sustainability has improved.

[0024]

According to the deodorant paint of the present invention, the aluminosilicate (a) and the oxidant (b) are used in combination.
By controlling the volume concentration of the pigment in the coating film within an appropriate range, excellent deodorizing power is exhibited, and the deodorizing effect is quickly exhibited, and the effect is excellent in persistence.

Therefore, various odor components are mixed in the odor generated in the human body, indoors, living environment, industrial facilities and the like, and the deodorant paint of the present invention quickly eliminates these odors.
Further, since the deodorizing effect is maintained for a long period of time, it can be widely used.

The deodorant paint of the present invention can be applied to wood, ceramics, gypsum board, metal materials, plastics, and the like in walls, toilets, bathrooms, around kitchens, in passenger compartments, and the like in dwellings, public facilities, hospitals, and the like.

Further, since the deodorant used in the present invention is a white powder, it can freely match the color tone desired for decoration and is suitable for cosmetic use.
Furthermore, since it is excellent in water resistance, adhesion to various materials, oil resistance, crack resistance, aging resistance, etc., it can be expanded to various applications. Hereinafter, examples of the deodorant paint and evaluation results thereof will be sequentially described, but the present invention is not limited to these examples.

[0028]

EXAMPLES Example 1 As a liquid A, a three-component composition ratio of SiO ₂ : 31 mol%, Z
Aluminosilicate and potassium persulfate corresponding to nO: 54 mol% and Al ₂ O ₃ : 15 mol% are mixed at a mixing ratio of 95 /
25 parts (by weight, the same applies hereinafter) mixed with 5
7.5 parts of molecular sieve powder (Showa Denko KK) and silicon carbide having an average particle size of 0.3 μm as a matting agent
Ranaru Nipseal 220A (Nippon Silica Co., Ltd.)
1.5 parts and mix gently. After leaving for about 10 minutes,
18.1 parts of a hydroxyl group-containing acrylic polyol (Dainippon Ink and Chemicals, Inc.) and 15 parts of butyl acetate are added and sufficiently mixed with a high-dispersion device.

Next , an acrylic resin having an average particle size of 0.2 μm
Pigment and deodorant in coating liquid
To prevent the sedimentation of the components and to disperse the components in the coating film.
2 parts of a microgel (Mitsui Toatsu Chemical Co., Ltd.) giving thixotropic properties are added and mixed, and 15 parts of cellosolve acetate is added to make a mill base. This mill base was dispersed by a motor mill for two passes, and after taking out the mill base, the inside of the mill was washed with 9 parts of ethyl acetate and 5.7 parts of toluene, and then butyric acetate cellulose (20% liquid).
0.6 parts, 0.5 parts of a silane coupling agent and 0.1 parts of zinc octate are added, and mixed with a high disper to form a coating. This is filtered through a 150 mesh sieve and stored.

As a liquid B, 7 parts of a burette type polyisocyanate liquid (Asahi Kasei Kogyo Co., Ltd.) and 3 parts of toluene are sufficiently stirred, filled with nitrogen gas and stored. These A liquids,
Solution B blending weight ratio, solution A: solution B: thinner = 100: 1
The mixture was sufficiently mixed at 0:40, spray-coated on the ABS resin, and dried at 25 ° C. for 8 hours.

The pigment volume concentration in this coating film was 41.7%, and the temperature dispersion in the viscoelastic properties of the coating film was as follows: glass transition temperature 70-80 ° C., Tan δ = 0.7-0.8. It was an ideal area showing the range. In addition to this,
The general properties of the coating film are shown in Table 1 below.

Example 2 The composition ratio of the three components of the aluminosilicate was 41 mol% of SiO ₂ , 38 mol% of ZnO, 21 mol% of Al ₂ O ₃ , and the mixing weight ratio was oxidizing agent as hydrogen peroxide. 90/10
A deodorant paint was obtained in the same manner as in Example 1 except that the deodorant mixed in the above was used.

Example 3 The composition ratio of the three components of the aluminosilicate was 55 mol% of SiO ₂ , 28 mol% of CoO, and 17 mol% of Al ₂ O ₃ , and the compounding weight was assuming that the oxidizing agent was potassium permanganate. A deodorant paint was obtained in the same manner as in Example 1 except that a deodorant mixed at a ratio of 80/20 was used.

Example 4 The three-component composition ratio of the aluminosilicate was 55 mol% of SiO ₂ , 28 mol% of NiO, and 17 mol% of Al ₂ O ₃ , and the oxidizing agent was diperoxide decandioic acid. A deodorant paint was obtained in the same manner as in Example 1 except that a deodorant mixed at a weight ratio of 55/45 was used.

Examples 5 to 8 Deodorant coatings were obtained in the same manner as in Example 1 except that the raw materials described in Tables 2 and 3 were used. Note that the same molecular sieve powder, hydroxyl group-containing acrylic polyol, and buret type polyisocyanate liquid as in Example 1 were used.

Comparative Example 1 A deodorant paint was obtained in the same manner as in Example 1, except that activated carbon was used as the deodorant.

Comparative Example 2 The deodorizing paint was obtained in the same manner as in Example 1 except that the raw materials described in Tables 2 and 3 were used. These deodorizing performances were evaluated according to the following evaluation methods, and the evaluation results are shown in Table 4 together with Comparative Examples.

<Evaluation of Deodorizing Effect> Meat, vegetables, fish and the like were placed in a 6-liter desiccator and allowed to stand for 2 weeks to produce an artificial garbage odor. The deodorant paint piece applied on the ABS resin was cut into a size of 5 × 10 cm, and placed in a 1.8-liter wide-mouth bottle to obtain a sample. Into this jar, put 10 ml of headspace gas of artificial garbage smell from the 6 l desiccator,
The odor intensity over time was evaluated organoleptically according to the following criteria.

[0039] The evaluation was conducted by a professional panel of 5 people.
Name averages are rounded.

[0040]

[Table 1] Test items result Test condition Paint appearance White matting Visual judgment  Adhesiveness 100/100 Make 100 squares of 1mm square to reach the substrate Find out the number of Impact resistance Pass Load applied to painted surface by DuPont impact tester give. Weight 500g, head 50cm Heat-adhesive pass 5 layers of 50mm square gauze, 500g weight And leave at 50 ° C for 24 hours. Warm water resistance Pass Immersion in 40 ° C warm water for 240 hours After 100/100, the adhesion test is performed. Moisture resistance Pass Leave at 50 ° C-95% for 240 hours, 24 hours at room temperature After storage for 100/100 hours, perform an adhesion test. Heat cycle resistance passed 50 ℃ ± 30 ℃ × 1 hour as 1 cycle, 30 cycles No cracks Observe changes after cycling. Weather resistance No cracks After 500 hours of Q.U.V. Observe 100/100 adhesion. Aging resistance No abnormal appearance After 70 hours at 240 ℃ Observe 100/100 adhesion.

[0041]

[Table 2]

[0042]

[Table 3]

[0043]

[Table 4]

────────────────────────────────────────────────── ─── Continued on the front page (72) Minoru Kishi 7-13-12 Hirai, Edogawa-ku, Tokyo Rion Co., Ltd. Research and Development Headquarters (58) Field surveyed (Int.Cl. ⁶ , DB name) C09D 5/00 C09D 7/12

Claims (3)

(57) [Claims] 1. A coating composition comprising (a) an aluminosilicate and (b) an oxidizing agent, wherein the pigment has a pigment volume concentration (including the aluminosilicate and the oxidizing agent) of 20% to 45%. Characteristic deodorant paint. 2. The aluminosilicate of the component (a),
In the three-component composition ratio expressed as an oxide, (M represents a composition corresponding to at least one metal selected from zinc, copper, silver, cobalt, nickel, iron, titanium, barium, tin and zirconium, and n represents a valence of the metal). The deodorant paint according to claim 1. 3. The oxidizing agent of the component (b) is an organic peracid or a salt thereof, a percarbonate or a persulfate.
Or the deodorant paint according to 2.