JP5198787B2 - Aldehyde deodorant composition - Google Patents

Description

  The present invention relates to an aldehyde deodorant composition used for automobiles, building materials and the like.

  In each field of automobiles and building materials such as fiber, wallpaper, adhesive, urethane foam, paint or plywood, it is required to deodorize the causative substance of sick house syndrome. For example, Patent Documents 1-3 disclose a deodorant for formaldehyde that is one of the causative substances of sick house syndrome.

By the way, as a causative substance of sick house syndrome, there are acetaldehyde and the like, and there is a high need for deodorization of acetaldehyde. However, the deodorizers of the above documents have problems such as safety concerns and insufficient deodorizing properties against acetaldehyde.
Japanese Patent Laid-Open No. 11-46965 JP-A-11-59744 JP-A-11-128329

  An object of the present invention is to provide a deodorant composition that exhibits high-performance deodorization even for acetaldehyde, which is considered to be extremely difficult with formaldehyde and a highly safe deodorant.

According to the present invention, the following aldehyde deodorant composition is provided.
1. An aldehyde deodorant composition comprising an ammonium salt and urea.
2. The aldehyde deodorant composition according to 1, wherein the amount of the ammonium salt is 1 to 43 parts by mass and the amount of urea is 1 to 33 parts by mass when the total composition is 100 parts by mass.
3. The aldehyde deodorizing composition according to 1 or 2, wherein the ammonium salt is at least one selected from monoammonium phosphate, diammonium phosphate, and ammonium sulfate.
4). The aldehyde deodorizing composition according to any one of 1 to 3, comprising 45 to 97 parts by mass of water and 0 to 15 parts by mass of a binder resin, when the total composition is 100 parts by mass.
Aldehyde deodorant hardened | cured material obtained by drying the aldehyde deodorant composition of 5.4.
6. A gypsum board obtained by blending the aldehyde deodorant composition according to any one of 1 to 3.

According to the present invention, it is possible to provide a highly safe aldehyde deodorizing composition that exhibits high deodorizing properties not only to formaldehyde but also to acetaldehyde.
In addition, since the ammonium salt and urea, which are components of the aldehyde deodorant composition of the present invention, are both highly water-soluble and highly safe, the aldehyde deodorant composition of the present invention is extremely easy to handle.

The aldehyde deodorant composition of the present invention is characterized by containing an ammonium salt and urea.
As the ammonium salt, an inorganic acid or an organic acid ammonium salt can be used.
Ammonium salts of inorganic acids include: 1 ammonium phosphate, 2 ammonium phosphate, ammonium chloride, ammonium sulfate, ammonium citrate, ammonium chloride, ammonium sulfite, ammonium bisulfite, ammonium nitrate, ammonium fluoride, ammonium sulfide, ammonium carbonate, carbonic acid Examples include ammonium hydrogen.

  Examples of the organic acid ammonium salt include ammonium acetate, ammonium formate, ammonium propionate, ammonium oxalate, ammonium acrylate, ammonium stearate, ammonium adipate, ammonium benzoate, and ammonium citrate.

  In the present invention, an ammonium salt of an inorganic acid is preferably used from the viewpoint of cost, water solubility and the like. Among them, ammonium sulfate, monoammonium phosphate, or diammonium phosphate can be particularly preferably used from the viewpoint of solubility in water and thermal stability during drying.

  As urea, commercially available urea can be used, but when it is dissolved in water, granules or powders are preferred.

The aldehyde deodorant composition of the present invention has an ammonium salt content of 1 to 43 parts by mass and a urea content of 1 to 33 parts by mass when the total composition is 100 parts by mass. Is preferred. If the amount is less than 1 part by mass, the deodorizing property may not be sufficiently imparted, and if it exceeds 43 parts by mass of ammonium salt or more than 33 parts by mass of urea, the solubility in water may be lowered, and the coatability may be deteriorated.
As for the compounding quantity of ammonium salt and urea, it is especially preferable that ammonium salt is 3-30 mass parts and urea is 3-25 mass parts.

In addition, as other materials constituting the composition of the present invention, for example, water, binder resin, surfactant, thickener, foaming agent, antifoaming agent, dispersing agent, etc. may be used appropriately according to the application. Can do.
Further, the composition of the present invention includes other adsorbing components and deodorizing components such as porous silica, activated carbon, zeolite, activated clay, silica gel, alumina, montmorillonite, titanium oxide, zinc oxide, iron oxide and the like. Inorganic substances and amine compounds such as organosilicon amines, aromatic amines, and hydrazine derivatives can be added.

Hereinafter, the example which uses the composition of this invention as a surface treating agent is demonstrated.
For use as a surface treatment agent, water and a binder resin are blended in addition to the above-described ammonium salt and urea. The binder resin is used, for example, in the form of a water emulsion.
As the binder resin, urethane resin, acrylic resin, or a copolymer thereof can be used. In particular, an acrylic resin having a methylol group or a copolymer thereof is preferably used.

In the surface treatment agent, each component is blended in an amount of 100 parts by mass of the entire composition, 1 to 43 parts by mass of ammonium salt, 1 to 33 parts by mass of urea, 0 to 15 parts by mass of binder resin and 45 water. It is preferable that -97 is a mass part.
Particularly preferably, the ammonium salt is 3 to 30 parts by mass, urea is 3 to 25 parts by mass, the binder resin is 0 to 15 parts by mass, and water is 55 to 92 parts by mass.
In addition, when the binder resin is less than 1 part by mass, there is a possibility that the adherence to an object to be coated is not sufficient. On the other hand, when the amount of the binder resin is more than 15 parts by mass, the material hardness may be increased or the appearance may be deteriorated.

The surface treatment agent can be applied to an object to be coated by various coating methods. As a coating method, a known processing method such as a dipping method, a gravure coating method, a knife coating method, an air frost method, or a spray processing can be adopted.
Although the required viscosity of the surface treatment agent varies depending on the processing method, it can be appropriately adjusted using an acrylic or cellulose thickener.
By applying the surface treatment agent and then drying, a deodorant film (cured product) made of the composition of the present invention can be formed on the surface of the object to be coated, thereby obtaining a deodorant product.

The amount of the surface treatment agent varies depending on the required characteristics of the coating object, preferably, from 1 to 20 g / ^{m 2} by dry weight relative to the coating object, particularly preferably, a 2 to 15 g / ^{m 2} It is desirable.
The surface treatment agent (water emulsion) is applied to the surface of, for example, fibers, non-woven fabrics, wallpaper, adhesives, urethane foam, paint products, plywood products, board products, etc. It can be given a deodorant product. Thereby, the air of the external environment can be deodorized. In particular, it can be suitably used as a surface treatment agent for fibers, nonwoven fabrics, wallpaper or urethane foam.
Moreover, the generation amount of an aldehyde can be reduced by apply | coating the composition of this invention to the generation source of an aldehyde.

In addition, the composition of this invention can add deodorizing property while suppressing generation | occurrence | production of the aldehyde from these by mixing with the material which comprises a gypsum board, wallpaper, an adhesive agent, urethane foam, or a coating material. That is, a deodorant product can be produced. In this case, the compounding quantity of ammonium salt with respect to 100 mass parts of dry mass of each product. It is preferable that the blending amount of 0.5 to 20 parts by mass and urea is 0.5 to 20 parts by mass. If the blending amount is less than 0.5% by mass, the deodorizing effect may not be sufficient. On the other hand, if it exceeds 20% by mass, the physical properties as a substrate may be reduced.
In particular, a gypsum board containing a composition containing ammonium sulfate and urea is preferable because of its excellent formaldehyde deodorizing properties and curing speed.

  Moreover, the deodorizer of this invention is especially useful as a formaldehyde deodorant composition for adhesive compounding. For example, it can be used as an adhesive for particle boards. Specific examples of the adhesive include melamine resin adhesives and urea resin adhesives.

Example 1
(1) Preparation of deodorant composition 10% by mass of diammonium phosphate (manufactured by Kanto Chemical Co., Ltd., deer grade 1), 10% by mass of urea (manufactured by Kanto Kagaku Co., Ltd., deer grade 1), alkyl acrylate copolymer aqueous emulsion ( A deodorant composition was prepared by mixing 10% by mass of Gantz Kasei, 50 wt% water emulsion) and 70% by mass of water.

(2) Coating of deodorant composition The deodorant composition prepared above was applied to a polyester non-woven fabric (50 g / m ² basis weight) with a simple spray. Then, it dried at 120 degreeC for 4 minute (s), and obtained the deodorizing polyester nonwoven fabric.
This deodorizing nonwoven fabric was coated with 7.5 g / m ² of a deodorizing composition on a dry mass basis.

(3) Evaluation of deodorant composition About said deodorant nonwoven fabric, the deodorizing ability of formaldehyde and acetaldehyde was evaluated.
Specifically, 5 μL of a formaldehyde or acetaldehyde aqueous solution (5% concentration) was filled in a 2.5 L Erlenmeyer flask and left for 1 hour to adjust the gas concentration in the Erlenmeyer flask. The initial concentration in the flask was 32 ppm for formaldehyde and 24 ppm for acetaldehyde.
The above-mentioned deodorant nonwoven fabric cut into 10 cm square was sealed in this flask and left for 2 hours. Two hours later, the gas concentration of formaldehyde or acetaldehyde in the flask was measured with a detector tube manufactured by Gastec. The results are shown in Table 1.

Examples 2-7 Comparative Examples 1-5
A deodorized nonwoven fabric was prepared and evaluated in the same manner as in Example 1 except that the composition of the deodorant composition was changed to the ratio shown in Table 1. In Comparative Example 5, the deodorizing property of the nonwoven fabric not coated with the deodorizing composition was evaluated. The results are shown in Table 1.

Example 8
In the gypsum board test production apparatus, 2.5 parts by mass of a composition comprising 20% by mass of ammonium sulfate, 20% by mass of urea and 60% by mass of water is blended with respect to 100 parts by mass of gypsum, and the thickness is 12.5 mm. A gypsum board having a specific gravity of 0.7 was produced. The gypsum curing time was 20 minutes. This gypsum board was cut into 10 cm square.
5 μL of a 5% formaldehyde aqueous solution was introduced into a 5 L sealed container, and after 1 hour, the initial formaldehyde concentration was measured with a detector tube manufactured by GASTEC, and found to be 15 ppm. The cut gypsum board was then placed in a sealed container and the formaldehyde concentration measured after 2 hours was 2 ppm.

Example 9
In the gypsum board test production apparatus, a gypsum board was produced by blending 1 part by mass of a composition comprising 20% by mass of ammonium sulfate, 20% by mass of urea and 60% by mass of water with respect to 100 parts by mass of gypsum. A deodorization test was carried out in the same manner as in Example 8. The gypsum curing time was 24 minutes, and the formaldehyde concentration after 4 hours after placing the gypsum board in a closed container was 4 ppm.

Comparative Example 6
A deodorization test was carried out in the same manner as in Example 8 except that the gypsum board was produced without blending the deodorant composition with the gypsum board using the gypsum board test production apparatus. The gypsum curing time was 38 minutes, and the formaldehyde concentration after 2 hours after placing the gypsum board in a sealed container was 10 ppm.

Example 10
Example, except that 2.5 parts by mass of a composition composed of 20% by mass of diammonium phosphate, 20% by mass of urea and 60% by mass of water is blended with 100% by mass of gypsum in a gypsum board test production apparatus. A deodorization test was conducted in the same manner as in FIG. The gypsum curing time was 80 minutes, and the formaldehyde concentration 2 hours after the gypsum board was placed in a sealed container was 3 ppm.

  As shown in Table 2, the ammonium sulfate / urea composition was particularly excellent in terms of gypsum curing rate and formaldehyde deodorization.

  The aldehyde deodorant composition of the present invention can be used as a deodorant for fibers, nonwoven fabrics, wallpaper, gypsum board, adhesives, urethane foam, paint products and the like.

Claims (4)

An aldehyde deodorant composition comprising at least one ammonium salt selected from monoammonium phosphate, diammonium phosphate and ammonium sulfate and urea ,
The aldehyde deodorant composition whose compounding quantity of the said ammonium salt is 1-43 mass parts and the compounding quantity of the said urea is 1-33 mass parts when the whole composition is 100 mass parts . The aldehyde deodorant composition according to claim 1 , comprising 45 to 97 parts by mass of water and 0 to 15 parts by mass of a binder resin when the total composition is 100 parts by mass. An aldehyde deodorant cured product obtained by drying the aldehyde deodorant composition according to claim 2 . The gypsum board formed by mix | blending the aldehyde deodorant composition of Claim 1 .