JPH06312909A - Permeable antifouling-mildewproofing agent composition having water repellency - Google Patents

Abstract

PURPOSE:To obtain a permeable antifouling mildewproofing composition having water repellency extremely effective against the surface of a porous material, having excellent stain resistance and mildew resistance, maintaining effect for a long period of time. CONSTITUTION:A permeable antifouling.mildewproofing composition having water repellency useful for a porous material is obtained by adding 0.03-20wt.% of 10,10'-oxybisphenoxyarsine to a low-molecular siloxane having 100-5,000 molecular weight.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a water-repellent penetrating antifouling / antifungal composition suitable for porous bodies such as concrete, mortar, slate board, foam concrete, stone, brick, silica board and wood. Regarding things.

[0002]

2. Description of the Related Art Civil engineering and building materials lose their weather resistance outdoors due to moisture such as rain and humidity, stain on the surface, and eventually deteriorate inside. Conventionally, in order to prevent this stain and deterioration, epoxy resin, acrylic resin,
It has been covered with a coating material such as urethane resin or protected by a water-repellent penetrating water-absorption inhibitor containing silicone as a main component.

However, the former coating method has a problem in that the coated surface becomes glossy or the coated surface becomes a dark color, impairing the color of the porous body itself. In addition, there is a restriction that the use places are limited because the coating material impairs the air permeability of the porous body. on the other hand,
With a water-repellent permeable water-absorbing agent containing silicone as the main component, the material's breathability is not impaired, and the water absorption rate of the material can be greatly reduced, and moisture wicking is hardly affected. Therefore, the drying function can be maintained without change, but in humid places and factories that use fungi (food, liquor, etc.), mold and surface deterioration of the material was observed.

Therefore, in recent years, water absorption inhibitors prepared by mixing a fungicide with various methods have come to the market. However, the method of mixing the water absorption inhibitor mixed with the antifungal agent is not completed by simple dissolution, and most of them are performed by a method such as forced dissolution by heating. In this case, there is a problem in that the effect of the antifungal agent may not flow out because the antifungal agent may flow out after the application to the porous body depending on the storage condition thereafter. In addition, there is a possibility that the water absorption prevention effect may be adversely affected, and further study is necessary.

Further, it is natural to use a low toxicity and non-polluting antibacterial agent to be mixed, but the action is limited depending on the kind of antibacterial agent, and a long-term effect is expected with an ordinary antibacterial agent. could not.

[0006]

[Means for Solving the Problem] Therefore, the molecular weight of 100-
A porous body obtained by adding 0.003 to 20% by weight of 10,10'-oxybisphenoxyarsine to 5,000 low-molecular weight siloxaso by using a penetrating antifouling and antifungal agent having extremely useful water repellency Solved the problem.

As the low-molecular siloxane used in the present invention, those represented by the following formula can be used.

[0008]

[Chemical 1]

The antibacterial agent which can be used in the present invention is 10,1.
It is 0'-oxybisphenoxyarsine. this is,
A pre-dissolved dimethylsiloxane may be used so that it can be easily dissolved in the low-molecular siloxane.

The antibacterial agent is added in the composition of the present invention in an amount of 0.03 to
It is desirable to mix it so as to contain 20% by weight,
The above range may be exceeded depending on the storage state of the antibacterial agent. For example, 10,10′-oxybisphenoxyarsine itself is a solid at room temperature, and therefore it may be difficult to dissolve it directly in the low-molecular weight Shiroxashi. Therefore, considering the compatibility with the low-molecular-weight siloxane, it is considered to use the antibacterial agent dissolved in a solvent such as dimethylsiloxane in advance. In such a case, if a solvent having good compatibility is used, the addition amount of 10,10′-oxybisphenoxyarsine can be relatively small. If the compounding ratio of the antibacterial agent is 0.03% by weight or less, almost no antifungal effect can be expected, and if it is 20% by weight or more, the surface after application may be sticky or uneconomical.

In the present invention, a diluent may be added to the porous body to facilitate the application of the composition of the present invention. Examples of the diluent include paraffinic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, alcohols and alcohols, ketones, esters, mineral oils, etc. These may be used alone or in combination of two or more. When the above composition is used after diluting the low-molecular-weight siloxane 1 to 2 to 20 times with a diluent, the permeability to the porous body is improved and the drying property can be accelerated, and the dispersion of fungi is also possible. It is extremely effective in terms of workability such as helping.

[0011]

EXAMPLES The following various tests were conducted using the compositions having the formulations shown in Table 1.

Outdoor exposure test (1 year): 200 ml / sample
m ² (twice applied) was applied to the entire surface of a U-shaped groove having a length of 2 m and a height of 0.5 m with a roller and dried. Evaluation method-: No generation of mold was observed. +: The generation of mold was slightly recognized. ++: Occurrence of mildew was slightly observed.

Water absorption test (initial): vertical 15c in dry state
mortar with m, width 15 cm, and thickness 10 cm.
After applying 0 ml / m ² (twice applied) with a brush and curing at room temperature for 3 days, the weight change when immersed in water for 24 hours was measured. The water absorption rate is shown in% by volume.

Water absorption test (weather meter 1000 hr
After): 1 mortar treated as in the water absorption test (initial)
After a lapse of 1000 hours at a rate of 6 minutes of water injection,
The change in weight was measured.

The results are shown in Table 1.

[0016]

[Table 1]

10, 1 of the composition having the composition shown in Table 1
Table 2 shows the results of a comparative test in which 0'-oxybisphenoxyarsine was replaced with various antibacterial agents shown in Table 2.
The various test methods were the same as in Examples 1-9.

[0018]

[Table 2]

[0019]

EFFECTS OF THE INVENTION The composition obtained by the present invention is different from the conventional penetrating fungicides in that it has excellent antifungal properties and water repellency and has a long-lasting effect. Further, since there is almost no discoloration when applied to the surface of the porous body, the goodness of the material can be fully utilized.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display area C09D 183/04 PMT 8319-4J

Claims (2)

[Claims] 1. A water repellent property which is very useful for a porous body characterized by comprising 0.03 to 20% by weight of 10,10'-oxybisphenoxyarsine added to a low molecular weight siloxane having a molecular weight of 100 to 5,000. Penetrating antifouling / antifungal agent composition having 2. A low-molecular-weight siloxane having a molecular weight of 100 to 5,000 is added with 0.03 to 20% by weight of 10,10'-oxybisphenoxyarsine, and further added with a diluent.
A penetrating antifouling / antifungal agent composition having water repellency, which is extremely useful for a porous body characterized by being diluted 20 times