JPS59218806A - Method of improving woody material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for modifying an essential material with good productivity and without causing the strength to deteriorate.

Wood and its processed materials, such as Ki 41 Deck and Kikanbup, are light and strong, and have unique physical properties and a moonlit feel, making them ideal for building materials and furniture. It is used for a wide range of other purposes.

However, in −)j, erosion by various fungi and ゛white! 1
Due to damage from insects such as 7I1 °C' l1i5 (easy to sip, J3C in recent years has a high degree of airtightness, and the development of heating systems has made it difficult for J3C to succumb to such problems.) In fact, it has been increasing and is becoming a serious problem as one of the causes of the decrease in the durability of essential materials.

J:lζ, Wood M'A +4 LAlthough it absorbs moisture such as moisture according to the surrounding environmental conditions and dissipates it, it has good breathability, but on the other hand, it does not absorb such moisture, etc. This is due to the woody nature of deformations such as warping, twisting, expansion and contraction due to repeated use.

” - Note To improve problems related to rotting, it is common to incorporate preservatives and insecticides into essential materials, such as CreA sort songs. In this method, it is well known that chemical treatment such as acedelization is applied to 4i to chemically protect the hydroxyl groups in the component. .It is not a single material, but has an MJ711 component composition and a complex M1 weave structure. This method requires a long time for the reaction, it is extremely difficult to remove the excess reaction solution and catalyst, and the quality of the wood material is slightly reduced. There is a problem that it is difficult to carry out industrial production.

The present invention has been developed in view of these problems, and has the following advantages:2. The present invention provides a method for modifying wood materials that can produce highly productively modified wood 1" [4A] which also causes deformations such as warping, twisting, elongation 1+i, etc. be.

However, in the method of the present invention, after impregnating 11 JtA of water with an acetate aqueous solution, drying the wood material and applying an acetyl reaction solution to the wood according to an appropriate method, this modification Quality method (゛There is.

The method according to the present invention will now be explained.

The wood materials used in the present invention include water-containing veneers, unfavorable veneers, wood depths, etc., and are first thoroughly immersed in an aqueous acetate solution as a catalyst. f
It is also possible to do this by immersing the wood in an aqueous solution of itate salts, or at 40°C to 80°C to speed up the process.
Using an acetate aqueous solution warmed to about
1 J for pressurized injection: Lilium T9, 1 for such acetic acid will not deteriorate wood materials, and J for water washing.
C- is preferred because it is easy to remove and the reaction described below can be carried out satisfactorily and quickly.

Note that the concentration of the acetate aqueous solution in V is not particularly limited to B, but it is usually J if a concentration of about 5 to 30% is used.

In order to carry out the first reaction efficiently, it is particularly desirable to carry out the reaction at such a time that the moisture content of the wood 4A is 10% or less.

The dried catalyst ○Ij wood (Δ) is then treated with an acylation reaction solution to react with the hydroxyl groups of the 44 components of wood. !L water MY
A mixture of ITt or acetic anhydride and a stone (step solvent) can be used;
Aromatic hydrocarbons such as
21'I can be used.

This kind of right Yang i melt A1 ゛)1! -Water (to acid) In addition to becoming good at glacial acetic acid, I also learned that Fuha (strong sting of glacial acetic acid)
Improve the working environment by reducing the strength of wood (A) by reducing the strength of wood (A) by reducing the strength of wood (A) by reducing the strength of
・It has the advantage of being a clear screen.

In the method of the present invention, the reaction between wood K14A and the i-hytylation reaction solution is carried out in the following manner.

First, the above reaction solution is injected into the wood material 41 which has been dried after being impregnated with the catalyst. Even if one person gets stuck in immersing the wood 5 in the reaction solution, it is necessary to degas it by vacuum suction (to remove the air in the voids). is desirable.

) (1 reaction solution was injected and 71444 anti-In>
'/+ and react with X'i L/. This is the reaction caused by immersion.
t"!, 1, reaction n near is long << 2 τ, usually 1
Humidification of 00°C to 150°C 1. : It is preferable to carry out the reaction in the reaction solution.
It can also be carried out in a J pot under a JF. Furthermore, J
, 7'J rA J'J, it is also possible to perform the reaction at the i·λ temperature of the reaction solution.

In this way, the reaction solution was injected for 10 days within a month, and the reaction in the reaction solution was complicated.
A 4-meter building is located 1' to the right at the V' entrance A to perform a good and rapid acetylation reaction.''--Especially Ishikawa.

That is, - month injection place 111! Do -C put,
Rapidly from inside the wood] 11 A: The reaction actually progresses, and the acetic acid produced as a by-product of the reaction leaches into the reaction solution and enters the wood 4A. A phenomenon occurs in which the acid anhydride infiltrates, resulting in a uniform reaction.
1) Using 0, t) J, Ino is of course.

It should be noted that such injection (the reaction solution and the reaction solution used in this case can be used repeatedly).
, Tsute a1 born fil'n's, vinegar 1 and 61
Contains a double salt with an acid acid or a small amount of woody Ishin extract. .

Therefore, in the J3 method of the present invention, since the wood material is impregnated with n1 salt in advance with an aqueous solution, the I'll n salt is uniformly and efficiently deposited in the wood material. Since water is removed by drying, the acetic anhydride that has penetrated into the wood Y'1 reacts well with the 44 wood components (. 1 water tFf fi! 4'6-
After impregnation, U1 drying penetrates into the wood 4A and the acid reacts with the water in the wood to form l'l.
The conversion to i acid will result in less overcoating (Φ), and therefore - [1 dry overlay - will reduce the efficiency of such a reaction: 1
ζ II (-F'a can be prevented) Since the conversion to IT rlQ is suppressed from Australia 1, this J, "i'i IJ's low strength is reduced (Sarumono de Although acetate is not soluble in water, it is effective in removing acetic acid from the reaction solution, but it does not require a compound interest mechanism like that of wood. - In the case of I materials, it is a national strength to expect a good catalytic effect of acetate.

In addition, the use of catalysts such as tau-face acid salts (1. A spout for cleaning wood materials (can be easily removed).

In addition, in the method of the present invention, the water quality (4) is injected into the catalyst-containing wood material in advance, and then the reaction is carried out. It doesn't take much time to complete one office IJj well within a short 11iY interval.
However, in order to prevent the extraction of wood 44 components, it is possible to create a processing chamber that does not reduce strength, which is a great practical effect.

-Example- 3mm thickness 601unx 55mm, so 10 pieces of L Zomatsu 111 board 5i-F 96r':= Jfi (1
) nl acid-)-t-jJ'/mu aqueous H'i medium 1w immersion L7, reduced I [pressure injected into the veneer
Aqueous solution of 1~lium acid, meta 4: silene:) 1 ((water nt chuu - 60: 40 (7) IT! Reaction based on the ratio of W1, if!? The mixed solution was injected into the veneer.

Next, hold the board J111711 at about 125° (C
>D, irz into a reaction solution with the same ir mixture ratio as above, heated to 100 ml, and reacted for about 20 minutes while maintaining the heated state. After the reaction is completed, the mixed solution remaining in the veneer is It was removed by carbonization, washed with warm water, and dried to obtain an acedelized deck with an average avidelization rate of about 25%.

In this J,) acedelization of the 4f deck was carried out 10 times under the same conditions T'C'' while repeatedly using the reaction solution. The Acedel 1 Hq1 plate exhibiting a fluorinated rate was t':I/.This acetylated veneer was in good condition with no cracks or the like.

-Comparative Example- 10 sheets of 1 piece tI1. The treatment deck was immersed in the same reaction solution as in the example at about 125'C.
The mixture was reacted for 20 minutes, carbonized, washed, and dried while maintaining a heating temperature of f111, and the sol conversion rate was 18% on average.

On the other hand, the reaction solution was reacted with -C for 40 minutes in the same column 1'1, and the reaction solution was dyed with the extracted components of the essence by Higashikawa in 7 colors, and the reaction was carried out. When the liquid is cooled, a double salt of 1 is precipitated.

This J, Uniki Ganmei I, L 'j' rail conversion place J!
J! Between 11 and 9. In addition to improving the '1-Jlr property, it is also possible to reduce the number of strokes by increasing the usage cycle of the reaction solution to Reijin 1+. Is it possible to prevent component extraction of wood? °l(Δ
The decline in the strength of the system is a major cause of concern.

28-

Claims (2)

[Claims] (1) After impregnating the essential material with an acetate aqueous solution and drying it, injecting the acetylation reaction solution into the essential material by an appropriate method, then further adding the reaction solution-injected wood material to the heated acetylation reaction solution. 22 inside! 71. A method for reforming essential materials, characterized by reacting with L'i Ll and aretylating the hydroxyl groups of the essential materials components. (2) The modified M-horn method for producing essential materials according to claim 1, wherein the reaction solution is a mixture of an organic solvent such as aromatic carbonized small wood, etc., 1 (1) and glacial acetic acid.