JPH05329805A - Method for forming colorless transparent protective layer in wood in impregnate state - Google Patents

Abstract

PURPOSE:To enable treatment preventing the penetration of rainwater, corrosion ageing and salt blocking discoloration and fading without changing the quality feeling and hue of wood by a method wherein a specific treatment agent having a dimethylsiloxane structure is applied to and infiltrated in wood to form a colorless transparent protective layer. CONSTITUTION:A treatment agent forming a colorless transparent permeable protective layer on wood in order to enhance the water resistance of the wood consists of 4 pts.vol. of silicone oil having a dimethylsiloxane structure, 40 pts.vol. of a silicone oil viscosity control solvent (consisting of 150 pts.vol. of methanol, 50 pts.vol. of methyl ethyl ketone, 50 pts.vol. of ethyl acetate and 230 pts.vol. of trichloroethylene), 100 pts.vol. of methanol, 100 pts.vol. of a silicone type silane compd. solution and 0.8 pts.vol. of ultrafine particles of hydrophobic anhydrous silica. This treatment agent is applied to and infiltrated in wood to form a colorless transparent protective layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention allows a colorless, transparent, and permeable liquid to penetrate into the internal structure of wood without impairing the appearance (texture and texture) of wood and the rustic feel peculiar to white wood. The method of forming a waterproof property inside the coated body is to protect the wood from rainwater, as it also protects it from wood-destroying fungi.Therefore, the useful life of the wood depends on the conventional coating film formation. First, it is a method of protecting wood from water without changing the surface texture of wood.

[0002]

2. Description of the Related Art Conventional outdoor coating systems are oil-based paints, synthetic resin-based paints, phthalate resin enamel, synthetic resin emulsion paints, etc. Normally, these coating films last about 3 to 5 years and cause chalking or cracking. , Peeling became noticeable and it was necessary to repaint and repair. For those who do not want to hide the wood with the above materials, clear coating with urethane resin or the like is performed. Alternatively, there is a type of oil-tin-based paint that does not form a coating film by coating and impregnating wood.
For those who value the wood's unique grain and texture,
It is not a satisfactory painting system. It is necessary to transform wood into a durable one without changing the hue and texture of this material. Urekun resin, etc. is used for clear clear coating, but there is a change in hue due to resin application (changes to pale yellow). Furthermore, environmental conditions outdoors are severe, and relatively high-grade resin is used. However, regardless of this, partial deterioration occurs early, especially near the mouth surface, water is likely to stagnate, horizontal parts and corners are prone to deterioration,
Clear coating is yellowing, cracking, or peeling. When the clear clear coating deteriorates and needs to be repaired again,
Since the old deteriorated coating film must be completely peeled off, the economic loss is large. In particular, it is extremely difficult to protect white wood from various external factors without changing its hue or texture.

[0003]

The natural texture and hue of wood, especially of white wood, is particularly required. As described above, the pure Japanese-style house is unpopular in the conventional method because the original texture of Shiraki is lost. For the wood facing the outside, it is necessary to select a durable material suitable for various conditions such as swelling, shrinkage, moisture absorption and release due to moisture.
In addition, it is necessary to prevent discoloration due to light (ultraviolet rays) and to prevent stains from occurring → discoloration → fading due to scattering of rainwater. In view of the above problems, an object of the present invention is to prevent rainwater from entering, prevent corrosion and aging, and prevent salt discoloration and fading without changing the texture and hue of wood. It is an object of the present invention to provide a method for forming a colorless, transparent and impregnable protective layer.

[0004]

[Means for Solving the Problems] Wood, especially white wood, is exposed to severe environmental conditions (preventing intrusion of rainwater, preventing corrosion deterioration, etc.), texture and hue (colorless and transparent), and ease of repair maintenance (not coating film formation. , Colorless permeable protective layer) should be considered. As a means to protect from rainwater and various pollution factors without changing the hue and texture of the wood surface,
The solution consists of the following composition. (Compounding ratio) Silicone oil having a dimethylsiloxane structure: 4 parts by volume (viscosity 10000 CS) Silicone oil viscosity adjusting solvent: 40 parts by volume Silicone silane compound solution ……………… 100 parts by volume Ultrafine hydrophobic anhydrous silica ……………………………… 0.8 parts by volume Methanol ……………………………………………… ... 100 parts by volume The composition of the silicone oil viscosity adjusting solvent is shown below. From the above-mentioned mixing ratio, the Natsutsu solution is applied and permeated on the surface of the wood base material and dried to protect the wood from rainwater and other pollution factors. A water repellent / pollution control layer can be formed on the surface of the wood base material.

[0005]

[Function] On the surface of the wood base material, the above-mentioned silicone oil / silicone oil viscosity adjusting solvent / methanol / silicone silane compound / superfine hydrophobic anhydrous silica is preferable (4: 40: 100: 100: 0.8). The treatment agent obtained by mixing and stirring the mixture is applied and permeated. Methanol and a silicone-based silane compound, which is a low molecular weight oligomer having a low molecular weight as a main component, and a silicone oil whose molecular weight has been lowered by a viscosity adjusting solvent of a silicone oil, also penetrates into the base material at the same time. In addition, ultrafine anhydrous silica is
It has an effect of improving water resistance and abrasion resistance, and each of these chemical agents exerts a mutual effect to form a waterproof protective layer inside and on the surface of the wood base material. This waterproof performance
Being excellent, it also protects the wood from corrosion in order to prevent mold and black spots from breaking out of the wood under the influence of water. In addition, due to the addition of ultrafine silica anhydrous, it is caused by the action of light (ultraviolet rays). It can be expected to prevent color burn and discoloration, and also has an effect as an impermeable additive.

[0006]

[Examples] The procedure for producing a treating agent for a method of impregnating a colorless and transparent protective layer on wood is shown below. (1) 40 parts by volume of silicone oil having a dimethylsiloxane structure is weighed, and 400 parts by volume of silicone (viscosity 10000 CS) silicone oil viscosity adjusting solvent is weighed. (2) The measured silicone oil viscosity adjusting solvent is added dropwise to the silicone oil while mixing and agitating the silicone oil so that they are in a well-homogeneous state. Pour the entire amount (3) Next, add 1000 parts of the silicone-based silane compound solution.
Measure by volume and pour into the solution of (2) above. (4) Weigh 1000 parts by volume of methanol and pour into the solution of (3). (5) Weigh 8 parts by volume of ultrafine hydrophobic anhydrous silica and add exactly the whole amount to the solution of (4) so that fine powder does not scatter around, and mix gently and well. The above work is completed. Then, it is colorless and transparent to wood. A transparent protective layer forming treatment agent is completed.

[0007]

EXAMPLES The working steps for coating and impregnating wood with the treatment agent produced by the above procedure are shown below. (Test example) A Environmental condition Specimen (Outdoor temperature: 17.5 ° C Humidity 68%, Cloudy with occasional fine weather) Tree species Kusamaki Approx.
At the second place, the treating agent is mixed well by stirring, and then the treating agent is included in the varnish brush and applied to the wood base material. Leave to dry outdoors. After 20 hours, the dried state of the coated surface was confirmed. Since the surface was not wet, water was made to flow down from the cup toward the cut small section for the waterproof effect test. Not only was water not retained in the forehead cross section at all times, but the forehead cross section as well as other applied parts did not have a wet color, and a waterproof and drainage effect was confirmed. (Test example) B Environmental conditions (outdoor temperature 21 ° C, humidity 65%) It was applied to one entire surface. Leave to dry outdoors. After 18 hours of drying, a water resistance performance test is carried out.
Immerse the treated specimen in a water bath. After 65 hours, the test piece is pulled up and observed. It was confirmed that the test piece did not become a wet color at all, and that it was a waterproof and water repellent effect.

[0008]

The treatment agent of the present invention having waterproof and dustproof properties is
It retains the excellent properties of wood and is characterized by a very low water absorption rate due to a chemical treatment method that improves water resistance. In particular, it is expected that the application will be expanded as a material that requires durability for outdoors, bathrooms, basements, etc. where water resistance is strongly demanded, and that can also secure the natural texture of wood. Also, as a supplementary effect, it is a typical rot fungus. It has been confirmed that it has strong resistance to brown and white rot fungi after being left in an actual rot environment. Also, by applying this treatment agent, cracks on the surface of wood are also prevented. be able to. In a wood processing plant, it is possible to form a waterproof and drainage protection layer on wood by an easy method without applying pressure reduction or heat treatment. In addition, the weather resistance of the wood of the existing building is improved by bleaching and removing existing stains and stains and then coating and permeating the treating agent. It is an economical processing method without the need for special equipment or processing facilities.

Claims (1)

[Claims] 1. As a treating agent for forming a colorless and transparent penetrating protective layer for improving water resistance of wood, 4 parts by volume of silicone oil and 40 parts by volume of silicone oil viscosity adjusting solvent (150 parts by volume of methanol) having a dimethylsiloxane structure.・ Methyl ethyl ketone 50 parts by volume ・ Ethyl acetate 50 parts by volume ・ Trichlorethylene 230 parts by volume) ・ Methanol 100 parts by volume ・ Silicone-based silane compound solution 100 parts by volume ・ Ultrafine hydrophobic anhydrous silica 0.8 parts by volume Composed. A treatment method characterized by applying and treating a treating agent and impregnating and forming a colorless transparent protective layer on wood.