JP2003245904A - Penetration aid for lumber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a penetration aid for lumber which deeply penetrates lumber preserving agents such as a lumber antiseptic agent, an ant-proof agent, an insecticide, a fire retardant, a dyeing agent, perfume, a synthetic resin on the like deep into the lumber at a low cost only by lumber treatments of coating, soaking, punching and injecting methods without requiring equipment or materials for pressurized injection. <P>SOLUTION: The penetration aid for lumber is made by mixing aromatic hydrocarbons, a lower alcohol, dimethyl sulfoxide (DMSO), and methyl isopropyl ketone and fulfills a role as a carrier for deeply penetrating the lumber preserving agents such as the antiseptic agent, the insecticide, the ant-proof agent, the fire retardant, the dyeing agent, perfume, the synthetic resin or the like into the lumber. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention opens a wall hole closure by chemically decomposing and removing a filling material deposited in a wall hole (pit) of an infiltration route which is a plant tissue of wood.
The present invention relates to a penetration aid that allows a drug to penetrate deeply inside a member quickly and at low cost even if it is a difficult-to-penetrate tree species.

[0002]

Wood is an assembly of many small rooms separated by walls. The wall between the small rooms has a part (hole) equipped with a valve called a wall hole (pit), which serves as a passage for sap flow in trees and plays a role of a water movement control valve. In the coniferous trees such as cypress, which are responsible for the permeation of water and liquids in wood, is the tracheid, which is an aggregate of elongated bell-shaped cells, and the cells are hollow,
The wall of this cell has many wall holes (pits).
Each wall hole has a valve called a torus that is hung by a radial thread that connects it to the surrounding wall. The valve is in an open state when it fulfills a water-passing function in trees, but when water is lost due to heartwood or felling, the surface tension of the water causes the valve to move and block the wall hole. Since this is an irreversible phenomenon, it is not easy to return it to the open state. In hardwood, since the elements that make up the wood structure are more differentiated and developed, the conduit plays a major role in liquid flow, unlike the artificial conduit and wood fibers, so penetration of the liquid agent is easier than in the softwood temporary conduit. However, the vessel is often closed with a foamy substance called tylose. And various substances are deposited in the closed wall hole, which makes the liquid flow difficult.

In materials used under severe environmental conditions such as exterior members (exterior wood), which have recently been increasing, expected durability due to good or poor permeability to wood in addition to the effect of preservatives. The function is often affected, and also in the composite treatment of wood and plastic or inorganic matter, the problem is how to introduce the treatment liquid into the material quickly and evenly and to the target depth. That's what it means.

In response to the challenge of reducing total carbon dioxide emissions by 30% for the Japanese industry as a whole, the Chairman of the Architectural Institute of Japan has set the useful life of wooden structures to 1
He suggested that it should be extended in 2000. In other words, it means that the wooden structure must be tripled. It will not last for 100 years without a drug at least a minimum of 2 cm from the surface of a 10 cm square wood section. However, with the current technology, not only the coating and dipping method, but also the pressure injection method or the hot and cold bath method cannot be used even by insizing. (See Koichi Nishimoto, Special Feature on the 20th Anniversary Special Roundtable of the Japan Timber Conservation Society Publishing)

As the prior arts for improving the permeability which are being researched today, biological treatment methods (treatment with decay fungi, treatment with bacteria, enzyme treatment), chemical treatment methods, physical treatment methods (compression treatment, freezing treatment) Treatment, treatment using heat and steam), and sting treatment method (insizing treatment).
(Mr. Yuji Imamura, Wood Research Material, No. 31, 1995,
(See "Injecting chemicals into wood")

However, from the viewpoint of practical application at present, the biological treatment method is difficult to establish as a general-purpose technique unless a microorganism capable of selectively and efficiently decomposing the wall pore portion is found. is there.

The physical treatment method is a method of improving the permeability by physically destroying the cell wall (membrane) of wood, but a large amount of new investment is required to carry out a series of operations. Have to buy. Therefore,
There are problems such as high energy consumption, long processing time, high running cost, and high processing technology.

The puncture treatment method has many improvements such as damage to the surface of the material and unevenness in the degree of infiltration.

The chemical treatment method is to extract the substance adhering to the wall hole (pit) of the permeation route and to chemically decompose it. In particular, a major cause of poor injection efficiency in the core material is deposition of the core material components on the pit membrane, which is a chemical treatment for dissolving them out using a solvent. Further, the permeation direction of the chemical liquid is roughly divided into a lateral direction (radiation and tangential direction) and a longitudinal direction (fiber direction) of wood. Of these, the best permeability is in the fiber direction, which is also clear from the structure of the wood that absorbs water from the root. With today's chemical treatment methods, it is easy to penetrate in the fiber direction, but it is usually difficult to penetrate more than 1.6 mm in the radial and tangential directions, and it takes a long time to process. It is not practical in that respect. (Wood Handbook 199
9, Chapter 14, Page 21, For
est Products Laboratory,
U. S. Department of Agricul
"Ture", US Department of Agriculture, Wood Handbook 1999
See annual edition, chapter 14, page 21).

In order to solve the above-mentioned drawbacks of the conventional wood infiltration technique, the inventor of the present invention promptly decomposes the substance deposited in the wall holes (pits) of the infiltration route by the chemical treatment according to the present invention. Made it possible. Therefore, by reopening closed wall holes (pits), the chemical injection into wood can be performed by dipping, coating, perforating, or spraying only the difficult-to-penetrate wood such as cedar or cypress. We proposed a "chemical agent penetration method for wood" that penetrates deeply, quickly, and at low cost.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the fact that it is difficult to impregnate wood with a treating chemical solution in terms of woody cytology, and does not destroy woody tissue. The first technical problem is to chemically decompose the substance deposited in the wall hole (pit) of the permeation path.

The second technical problem of the present invention is that not only the permeation aid penetrates but the permeation aid serves as a carrier, and the antiseptic treatment, insect repellent treatment, termite repellent treatment, flame retardant treatment,
It is an object of the present invention to provide an auxiliary agent technology which plays a role of a carrier for simultaneously permeating a chemical agent for performing a modification treatment, a dyeing treatment, a fragrance addition treatment, a synthetic resin injection treatment and the like into a deep portion of wood.

Further, the third technical problem of the present invention is that despite the chemical treatment, the target of the injection amount (1) for the pressure injection method shown in the Japanese Industrial Standard (JIS standard).
20 kg / m3) can be achieved, so simple equipment can be used without the large-scale capital investment and large energy required for installation of the pressure injection method and insizing method.
Moreover, it is to provide an economical method capable of permeating deep wood in a short time.

[0014]

Means for Solving the Problems Toluene, xylene, isopropanol, and dimethyl sulfoxide (DMS)
The penetration aid consisting of O) is 5 in the fiber direction of bay pine.
A patent application 20 is to realize a penetration of 40 mm within a minute, and a penetration of 20 mm after 4 hours in the radial and tangential directions.
No. 01-323982, the amount and rate of permeation is further improved by adding more aliphatic ketones (eg, methyl isopropyl ketone) to this mixture,
As confirmed in the fiber shape photographs of FIGS. 6 to 7, permeation of 150 mm or more within 1 minute in the fiber direction of Beige pine, and 10 mm after radiation and tangential direction in 1 hour,
The feature is that the first technical problem is solved by adopting a means of realizing penetration of 30 mm or more after 4 hours.

By adopting the means for confirming the affinity between the penetration aid of the present invention and the drug (active ingredient) and the stability in the penetration aid in FIGS. 1 to 4, the above-mentioned second technique is adopted. The characteristic of the method is that it solves the technical problem.

The solvent which constitutes the penetration aid of the present invention is easily available because it is used in general commercial paints and the like, and it does not require a new large-scale investment for processing equipment. In addition to being able to greatly reduce the cost for wood preservation, it uses a solvent that is all registered under the Chemical Substances Control Law (Law concerning the examination of chemical substances and the regulation of manufacturing etc.) Therefore, the third technical issue was solved because immediate sales activities are possible.

[Examples] Hereinafter, a method for permeation-containing permeation aids for wood according to the present invention will be described with reference to Examples.

Dissolution test: In the dissolution test, chemicals used for the purpose of preserving wood and controlling termites were used. Isocyanuric acid-based tripropyl isocyanurate (TPI
C), organophosphorus fenitrothion, pyrethroids silafluofene and etofenprox, nicotinoid acetamiprid, and carbamate phenobcarb were dissolved at 30% concentration. There wasn't. Acetamiprid was confirmed to dissolve up to a maximum concentration of 10%.

Stability test: Etofenbrox, fenitrothion and tripropyl isocyanurate (TP
IC), stability in penetration aid was tested. (Stability test-1) Etofenprox: Etofenprox was dissolved in a penetration aid at a concentration of 30% (volume%), left standing at room temperature and normal pressure, and subjected to time-dependent high performance liquid chromatography (HPL).
Followed by C), the stability of etofenprox in the auxiliaries was confirmed, as shown in FIGS. 1 and 2. As shown in FIG. 3 and FIG. 4, no remarkable change was observed even after one week, which proved to be stable in the penetration aid. (Conditions) Used Column: Mightysil RP-8 G
P 250-4.6 (CicaReagent) Flowing solvent Eluent: acetonitile / w
ater 60/40 Flow rate Flow Rate: 1.0 ml / min Detection: 275 nm

(Stability test-2) Fenitrothion: Fenitrothion is stable against aromatic hydrocarbons and methyl isopropyl ketone, and therefore, it is dissolved in dimethyl sulfoxide (DMSO) and various alcohols and left at room temperature and normal pressure. , Analyzed by gas chromatography as specified by the residual pesticide test method.
As a result, as shown in FIG. 4, no remarkable change was observed even after 1 week, and it was proved that the composition was stable in the penetration aid.

(Stability Test-3) Tripropyl isocyanurate (TPIC); DM d
Dissolve in SO (DMSO-d6) and change with time to ¹ H-N
It was measured by MR. As a result, no remarkable change was observed even after 1 week, and it was proved that it was stable in the penetration aid.

(Penetration Test-1) (Case of Normal Temperature and Normal Humidity) Etofenprox and triproisocyanurate (TP) are three types of agents to be mixed with the penetration aid of the present invention.
IC) and fenitrothion are selected and the concentration is 5% each.
Unified to (weight). The size of the test tree is 40 × 40 × 4
It was unified to 0 mm (64 cm3). These test trees were completely immersed in the liquid agent in the developing tank, and the amount of the drug absorbed was measured by the weight change after a predetermined time. The amount of drug absorbed was quantified by the following method. Quantitative method: The test tree was subdivided and continuously extracted with acetone for 4 hours using a Soxhlet extractor. Then, acetone was distilled off under reduced pressure, and the residue was subjected to silica gel column chromatography (ethofenprox and TP).
IC) or neutral alumina (fenitrothion) for purification, and the drug amount was measured. Each of the three drugs is listed in Table 1.
And as shown in the drug penetration amount (g) in Table 2, for example, 5
It was proved that 5% of the absorbed amount in the wood was the drug when adjusted by the concentration of%. That is, it was confirmed that the active ingredient surely penetrated into the wood according to the adjusted drug concentration.

[0022]

[Table 1]

[0023]

[Table 2]

(Permeation test-2) Drying case: 10
The change in the amount of absorption was measured using cedar, cypress, bay pine and hemlock which were dried in a convection oven under the condition of 0 ° C. for 3 hours. The results are shown in Tables 3 and 4. As shown in FIG. 5, it was proved that the change in the absorption amount was absorbed at once in the initial absorption stage (1 hour), and then gradually absorbed in a gentle curve. Also, Table 3
As shown in, even after 1 hour, the injection amount of pressurized injection (120 kg / m3) targeted by the JIS standard.
It showed a higher injection amount. 148kg / m for cedar
3, the injection rate of 161 kg / m3 was measured for cypress. Specimen: 40 × 40 × 40 mm (64 cm3) Mixed drug: Fenitrothion drug concentration: 5% (weight)

[0025]

[Table 3]

[0026]

[Table 4]

(Penetration test-3): In the penetration aid of the present invention,
5% by weight of antitermite (fenitrothion), and antibacterial agent (n-hexadecyltrimethylammonium bromide) 1.
5% by weight was added, the test woods were completely soaked in a developing tank, and the weight change after a predetermined time was measured. The results are shown in Table 6.

[0028]

[Table 5]

(Penetration test-4); The penetration aid of the present invention,
5% by weight of the ant-preventive agent acetamiprid (trade name: Mospiran granules manufactured by Nippon Soda Co., Ltd.) was dissolved, the test tree was completely immersed in the developing tank, and the change in amount after a predetermined time was measured. The results are shown in Tables 7 and 8.

[0030]

[Table 6]

[0031]

[Table 7]

(Penetration test-5): In the penetration aid of the present invention,
Chloronicotinyl-based acetamiprid (trade name: Mospiran granules manufactured by Nippon Soda Co., Ltd.), ant-repellent and insect repellent, organophosphorus fenitrothion (trade name: Sumition manufactured by Sumitomo Chemical Co., Ltd.), pyrethroid-like etophene Brox (ethofenprox, chemical name: 2- (p-
ethoxypheny1) -2-methylpro
pyl 3-phenoxbenzylether),
Nippon Kasei Co., Ltd.'s tribropyr isocyanurate (T
PIC) was dissolved by 5% (by weight), the test tree was completely immersed in the developing tank, and the weight change after 4 hours and 24 hours was measured. The results are shown in Table 8, Table 9, Table 10, and Table 11.

[0033]

[Table 8]

[0034]

[Table 9]

[0035]

[Table 10]

[0036]

[Table 11]

[0037]

Among the techniques for impregnating wood preservatives, there is a physical treatment as a treatment method that can accelerate permeation to some extent. Specifically, there are a compression treatment, a freezing treatment, a treatment utilizing heat and steam, and an insizing sting treatment. Among them, the pressure treatment is predominantly performed. However,
All of them require high equipment costs, low energy efficiency, and the impregnation efficiency is not sufficient. When the penetration aid of the present invention is used, it is possible to penetrate deeply from the surface by simply treating the wood with a treatment chemical such as an ant-preventive agent and an antiseptic agent. Can be significantly reduced. Further, since the penetration aid of the present invention has high permeability to wood, the impregnation work can be completed in a short time, the treatment efficiency is dramatically improved, and a large amount of batch treatment is possible.

Furthermore, even under normal temperature and humidity environment, JIS
Since it can be penetrated to around the target value of the standard, it is possible to easily impregnate a treatment chemical liquid such as an antiseptic agent or an anti-termite agent even with an undried material. Therefore, since it is possible to adopt the immersion method and the spraying method and the injection method such as injection into a hole (diameter 2 mm) opened by a small diameter drill, it is possible to treat wood on site. The penetration aid technology of the present invention can mix not only wood preservatives but also other termite-preventing agents, xylem-treating agents, dyeing agents, flame retardants, etc. at the same time, if necessary, and various applications of wood are possible. By making it possible to use them for a long time, this is an epoch-making wood technology that can transform the life of Japanese wooden structures from 30 years of life to 100 years of life comparable to those in Europe and the United States.

[Brief description of drawings]

FIG. 1 is a diagram showing the dissolution stability of etofenprox alone.

FIG. 2 is a view showing a result of a dissolution stability test (after 30 minutes) in which etofenprox was mixed with a penetration aid.

FIG. 3 is a diagram showing the results of a dissolution stability test (after 1 week) in which etofenprox was mixed with a penetration aid.

FIG. 4 is a view showing the results of a dissolution stability test (after 30 minutes and after 1 week) in which fenitrothion was mixed with a penetration aid.

FIG. 5 is a diagram showing changes in the absorption amount of dried wood.

FIG. 6 is a photograph of a fiber shape showing penetration in the fiber direction.

FIG. 7: Photograph of fiber shape showing radiation and tangential penetration

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[Procedure amendment]

[Submission date] February 14, 2002 (2002.2.1
4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014]

Means for Solving the Problems Toluene, xylene, isopropanol and dimethyl sulfoxide (DMSO)
Japanese Patent Application No. 2001-331, in which the penetration aid consisting of (4) achieves a penetration of 40 mm within 5 minutes in the fiber direction of Beige pine and a penetration of 20 mm after 4 hours in the radial and tangential directions.
As shown in -3239982, the amount and rate of permeation is further improved by adding more aliphatic ketones (for example, methyl isopropyl ketone) to this mixture.
As confirmed in the fiber shape photograph of Fig. 7, permeation of 150 mm or more within 1 minute with respect to the fiber direction of Bay pine,
In addition, the first technical problem has been solved by adopting a means of realizing penetration of 10 mm after 1 hour with respect to the radiating and tangential directions and 30 mm or more after 4 hours .
Furthermore, the organic sulfur compound dimethyl sulfoxide (DMS
O) instead of acetone, ketones, amides, tet
Lamethylurea, N, N-dimethylacetamide of amides
Dimethylformamide (DM)
F), N-methyl-2-pyrrolidone of amides, amides
1,3-dimethylimidazolidinones of the class 3 of amides
-Methyl-2-oxazolidinone, N, N 'of amides
-Dimethylpropyleneurea, amide epsilon-ca
Prolactam, aliphatic nitro compound nitromethane, fat
Aliphatic nitrile acetonitrile (AN), sulfamide
Of tetraethylsulfamide (TES), sulfami
Tetrahydrothiophene-1,1-dioxides
(Sulfolane), a phosphoric acid amide of pentamethylphos
A penetration aid mixed with phononic diamide can also be used for
And adopting a means of achieving similar results.
Is characterized in that the above-mentioned first technical problem is solved by . ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 15, 2002 (2002.7.1)
5)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

A second technical problem of the present invention is that not only the permeation aid penetrates but the permeation aid serves as a carrier for preservative treatment, insect repellent treatment, termite repellent treatment and flame retardant treatment for wood materials. Chemical treatment, modification treatment, dyeing treatment, fragrance addition treatment,
Resin injection processing, chemical processing of musical instrument parts, engineering
Processing, wood / plastic composite, organic composite,
The first role is as a carrier to simultaneously permeate chemicals for waterproofing and strengthening deep into the wood .
It has the second stability, and these drugs are hardened in the material semipermanently.
It is an object of the present invention to provide a penetration aid technology which has a third role of allowing the material to be fixed and not appearing on the surface of the material .

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

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[0014]

[Means for solving the problem] Toluene, xylene, etc.
Aromatic hydrocarbons, lower alcohols such as isopropanol
Organic such as Cole and dimethylsulfoxide (DMSO)
Sulfur compounds, 3-methyl-2-butanone or 4-me
Penetration of aliphatic ketones such as chill-2-pentanone
Auxiliary agent, methylene chloride (also known as dichloromethane), etc.
Processing aids for organic chlorine solvents, styrene polymers, etc.
Agents, organic sulfur such as dimethylsulfoxide (DMSO)
Compounds, methyl isopropyl ketone and methyl isobutyl
Aliphatic ketones such as ketones, low levels such as 1-butanol
Japanese Patent Application No. 2001-323982 discloses that a penetration aid for wood, which is composed of a graded alcohol , achieves a penetration of 40 mm within 5 minutes in the fiber direction of bay pine and a penetration of 20 mm in 4 hours after radiation and tangential direction. The amount and rate of permeation was further improved by adding more aliphatic ketones (for example, methyl isopropyl ketone) to this mixture, which is confirmed by the fiber shape photographs in FIGS. 6 to 7. 1 minute within 1 minute of the fiber direction of the bay pine
By adopting a means of realizing a penetration of 50 mm or more and a penetration of 10 mm after 1 hour with respect to the radiation and tangential directions and a penetration of 30 mm or more after 4 hours, the above-mentioned first technical problem is solved and further organic Instead of the sulfur compound dimethylsulfoxide (DMSO), the ketones acetone, amide tetramethylurea, amides N, N-
Dimethylacetamide (DMA), amides dimethylformamide (DMF), amides N-methyl-2-
Pyrrolidone , amides of 1,3-dimethylimidazolidinone, amides of 3-methyl-2-oxazolidinone,
Amides N, N'-dimethylpropyleneurea, amides epsilon-caprolactam, aliphatic nitro compound ditromethane, aliphatic nitrile acetonitril (A
N), sulfamide tetraethylsulfamide (T
ES), tetrahydrothiophene-1,1-dioxai
The permeation aid obtained by mixing pentamethylphosphonic diamide of phosphoric acid amide with phosphoric acid amide also achieves the same result in terms of the degree of infiltration by the above-mentioned first technical problem. It is characterized in that it has been resolved.

[Procedure amendment 4]

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The first carrier of the penetration aid of the present invention
Roles are shown in Tables 1 and 2. Weight before immersion
The difference between the weight after soaking and the weight after soaking is the amount of drug absorbed.
The ratio of absorption and absorption is shown as drug penetration.
Make sure that the drug penetrates at the same rate at the same time as the penetration aid.
Can understand. The second stability is shown in Figs.
Melt stability test after 30 minutes and 1 week as shown
It is shown in the result of G. Furthermore, the drug that is the active ingredient
The third role that is fixed in the material and does not appear on the surface of the material
Percentage is a styrene polymer that is a processing aid or a similar synthetic
The solution was achieved by adding the resin to a penetration aid. General
Water-based active ingredients are typically antiseptics, termites or flame retardants.
As you can see in the agents, the treated wood gets wet,
The active ingredient is contained in the season or place where the humidity is high.
There is a drawback that gradually emerges from, and the effectiveness is significantly impaired. Difficulty
In the case of a fuel, it is effective whether it is organic or inorganic.
It has a serious defect that the components come out of the material and crystallize.
On the other hand, processing aids such as styrene polymer and similar
By adding synthetic resin to the penetration aid,
It can be solved by fixing it in the material semipermanently
It was The characteristic of the method is that these solve the second technical problem.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hayao Ito             Tsujimura Building 401, 33 Noto-cho, Shinjuku-ku, Tokyo             issue F term (reference) 2B230 AA27 AA30 BA01 CB04 CB07                       EA30 EB01                 4H011 AA01 AC01 AC03 BA01 BA06                       BB03 BB04 BB09 BB11 BB17                       BC01 BC03 BC04 BC05 BC06                       BC07 BC08 BC09 BC10 BC14                       DA13 DD07

Claims (5)

[Claims] 1. A wood penetration aid containing an organic sulfur compound and an aliphatic ketone as essential components, and containing aromatic hydrocarbons and a lower alcohol in combination. 2. Toluene 40 to 6 which is an aromatic hydrocarbon.
0% by weight, aromatic hydrocarbons xylene 5 to 15% by weight, lower alcohol isopropanol 5 to 15
A wood penetration aid which is 5% by weight, 5 to 25% by weight of dimethyl sulfoxide (DMSO) which is an organic sulfur compound, and 5 to 25% by weight of methyl isopropyl ketone which is an aliphatic ketone. 3. Toluene 40 to 7 which is an aromatic hydrocarbon.
0% by weight, lower alcohol isopropanol 5
A permeation aid for wood comprising 15% by weight, 5 to 25% by weight of dimethyl sulfoxide (DMSO) which is an organic sulfur compound, and 5 to 25% by weight of methylisopropylketone which is an aliphatic ketone. 4. The wood penetration aid according to claim 1, wherein the lower alcohol is any one of isopropanol, methanol and 1-butanol, or a mixture of two or more thereof. 5. The method according to claim 1, wherein acetone, which is a ketone, tetramethylurea, which is an amide, and N, N-dimethylacetamide, which is an amide, are used in place of dimethyl sulfoxide (DMSO) which is an organic sulfur compound. DM
A), amides dimethylformamide (DMF), amides N-methyl-2-pyrrolidone, amides 1,
3-dimethylimidazolidinone, amides 3-methyl-2-oxazolidinone, amides N, N'-dimethylpropyleneurea, amides epsilon-caprolactam, aliphatic nitro compounds nitromethane, aliphatic nitriles acetonitrile ( AN), tetraethylsulfamide (TES) of sulfamides, tetrahydrothiophene-1,1-dioxide (sulfolane) of sulfamides, pentamethylphosphonic diamide of phosphoramides, or two or more thereof. Penetration aid for wood which is a mixture of.