JPH0490301A - Composition to be impregnated into wood, wood impregnated with resin and preparation thereof - Google Patents

Abstract

PURPOSE:To obtain a resin-impregnated wood sufficiently holding impact resistance and hardness by a method wherein a wood is impregnated with a compsn. for impregnation of wood contg. a compd. of a specified formula and a curing agent as essential ingredients and the impregnated wood is cured. CONSTITUTION:A resin-impregnated wood is prepd. by impregnating a wood with a compsn. for impregnation of wood contg. a compd. or formula (I) and a curing agent as essential ingredients and curing the impregnated wood. In the formula (I), R is a hydrogen or a methyl group; R' is a 2-6C alkylene group or a 4-6C oxalalkylene group wherein two or more segments of at least 2C alkylene chains are bonded together through an oxygen atom; R'' is formula (II); n is 0 or 1. As the curing agent, a polymn. initiator such as an org. peroxide is used and if necessary, an accelerator is used. In this case, it is especially pref. that benzoyl peroxide is used as a curing agent and N,N-dimethyl-p- toluidine is used as the accelerator.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a composition for impregnating wood, a resin-impregnated wood, and a method for producing the same.

(Conventional technology) Traditionally, cypress, pine, oak, etc. are made up of 9% wood, but because they have poor impact resistance and hardness, when they are painted and used as flooring materials for construction, they are not coated with wood during construction work. Accidents have occurred where the paint film lifts off the wood and turns white due to falling tools or materials. As a countermeasure against this accident, there are a method of increasing the thickness of the top coat and a method of using laminated wood. In the former case, it depends on the age.

It has the disadvantage of being prone to cracking.

On the other hand, as for laminated wood, unsaturated polyester resin and epoxy acrylate are injected under a reduced pressure of 10 mmHH, and the injection Veneer't
-Place on plywood coated with adhesive.

Pressure 5 kg/cm2. fJMFK 10 at 120℃
It is known that the product is made by heat pressing for a minute. The manufacturing process for this type of laminated wood is complex and takes a long time.

It becomes expensive. Furthermore, since the laminated wood itself requires vacuum equipment and hot pressing, it has the disadvantage that there are restrictions on the size of the molded product.

(Problem to be solved by the invention) The present invention solves these problems.

Wood impregnating compositions that can be cured under normal pressure, have little odor, and have low viscosity, making them excellent in painting work and impregnating properties, as well as resin-impregnated wood that maintains sufficient impact resistance and hardness for flooring, etc. and a manufacturing method thereof.

(Ninth Means for Solving the Problems) The present invention is based on the general formula (I); represents an oxaalkylene group having a total of 4 to 6 carbon atoms, in which two or more segments of an alkylene chain having at least 2 atoms are bonded via an oxygen atom, and is represented by r'u, where n is 0 or 1; A composition for impregnating wood containing the compound shown in ) and a curing agent as essential components, impregnating wood with the composition,
This invention relates to resin-impregnated wood obtained by curing and its manufacturing method.

The compound represented by the general formula (I) in the present invention is a known compound, and the manufacturing method is also a known method (for example,
Special Publication No. Sho 61-43337 2% Release Sho 57-2003
The method described in Publication No. 31 etc.) can be followed.

The specific compounds are as follows: CFL+0 Hs 0 HJ 0 H30 CoutO. ) In the present invention, one or more compounds represented by the general formula (I) are used. Furthermore, it is also possible to use other known acrylic esters, methacrylic esters, etc. in combination without impairing the effects of the present invention. In this case, it is preferable to use it together in an amount of 75% by weight or less, particularly 50% by weight or less, based on the total amount of the compound represented by the general formula (I), since the effects of the present invention are less likely to be impaired.

In addition to the above, the composition for impregnating wood of the present invention contains a curing agent, and if necessary, additives and accelerators.

As the curing agent, a polymerization initiator such as an organic peroxide is used. Preferred organic peroxides include peroxides, hydroperoxides, etc. derived from hydrocarbons having 2, for example, about 2 to 18 carbon atoms, which are easily soluble in the above compounds. Specifically, t-butyl hydroperoxide, cumene and droperoxide, methyl ethyl ketone hydroperoxide, diinopropylbenzene hydroperoxide.

Penduyl peroxide, t-butylberbenzoate.

2-bis-(t-butylperoxy)-butane.

≠Nakatebisu(I-hydroxy-cyclohexyl)-peroquindo, t-butylperoxyisopropyl carbonate, and the like. These curing agents have the general formula (I
) or the total amount of this and other acrylic esters and methacrylic esters, 0.5 to 6
Preferably, it is used in an amount of 1% to 5% by weight.

It promotes the action of As a promoter.

Aromatic amines are used, specifically aniline,
N,N-dimethylaniline, N,N-diethylaniline, toluidine, N,N-dimethyl-p-)luidine, N,N-di(hydroxyethyl)toluidine,
Examples include p-dimethylaminobenzaldehyde.

When using these accelerators.

With respect to the total amount of the compound represented by general formula (I) or this and other acrylic esters and methacrylic esters,
Preference is given to using 0 to 4% by weight, especially 0.5 to 3% by weight.

Benzoyl peroxide as curing agent, N, N- as accelerator
Particular preference is given to using dimethyl-p-)luidine.

Additives used as necessary further accelerate the action of the curing agent or the accelerator and promote oxidative curing.

Examples of the additive include polyvalent metal salts and/or polyvalent metal complexes such as naphthenic acid and fatty acids having up to 30 carbon atoms. Examples of these metal components are calcium, copper (■), and zinc (■).

Manganese (II), Manganese (DI), Lead (If),
Cobalt (II), # (If), Vanadium (
(2), zirconium (2), etc. Examples of acid components include resin acid (ie, rosin acid), tall oil fatty acid, linseed oil fatty acid, 2-ethylhexanoic acid, and lauric acid.

Palmitic acid, myristic acid, oleic acid, linoleic acid, lylunic acid, behenic acid, cerotic acid, and molystic acid may be used. These are compounds represented by general formula (I) or other acrylic esters thereof.

0 to 2% by volume 2% based on the total amount of methacrylic acid ester
It is preferable to use 0.3 to 1.0% by volume.

Each of the above ingredients is preferably added immediately before use.

A composition is prepared by mixing by a known method, and the mixture is applied to the wood surface by spraying, dip coating, or roll coating to impregnate it, and then hardened.

The wood to which the composition is applied, impregnated, and cured includes coniferous trees such as pine, cypress, and hemlock, elm, and oak.

Wide-ranging trees such as ash, Japanese zelkova, and zelkova are used.

The application rate of the composition varies depending on the type of wood, use, etc., but is 0.01 to 1.00 kg/m'', especially 0.0
Preferably, 5 to 0.5 kg/m2 is used.

Moreover, the curing conditions are about 10 minutes to 24 hours at 30 to 80°C. For example, conditions such as 5 hours at 50°C and 30 minutes at 70°C are applied.

The resin-impregnated wood obtained in the above manner is coated with a well-known air-drying alkyd paint 2 for the purpose of improving weather resistance and making it beautiful.
and acid-curing amino alkyd paints.

Further, a known UV paint such as acrylic, polyester, or urethane epoxy can be applied.

The obtained resin-impregnated wood can also be laminated onto plywood as a veneer, for example, 1 mm thick, and used as a long-sheet composite board.

The resulting resin-impregnated wood is used for various applications. For example, it is used as a material for flooring, doors, walls, etc. of houses, and furniture.

(Example) The present invention will be explained with reference to an example. In addition, "part" in an Example is a weight part, and "%" is weight%.

Example 1 1 part of cumeno-hydrobar oxide (80% product 2 manufactured by NOF ■, trade name Barkmill H) was added as a curing agent to 100 parts of dicyclopentenyloxyethyl methacrylate H30, and further as a drying accelerator. A composition (A) was obtained by adding 0.5 part of 6% cobalt naphthenate (manufactured by Inu Nippon Ink Industry Co., Ltd.). This composition (2) was applied to an oak veneer at a concentration of 100 g/m2 by roll coating, and then heated at 70°C for 3
After drying for 0 minutes (7 days), it was left to stand for 7 days, and the impregnability, DuPont impact and hardness were evaluated.

Example 2 A composition (B) was obtained by blending dicyclopentenyloxyethyl methacrylate with dicyclopentenyloxyethyl methacrylate.

Composition (B) was applied in the same manner as in Example 1 to obtain an oak veneer. Characteristics were evaluated in the same manner as in Example 1.

Example 3 Dicyclopentenyl acrylatenol = -70/instead of dicyclopentenyloxyethyl methacrylate
30) 30 parts were added to obtain paint. ■) Example 1
An oak veneer was obtained by painting in the same manner as above. Characteristics were evaluated in the same manner.

A composition (C) having the same formulation as in Example 1 was obtained.

The composition (C1) was coated in the same manner as in Example 1 to obtain an oak veneer.The properties were evaluated in the same manner.

Comparative Example 1 Acid-curing amino alkyd resin (Melan 4 manufactured by Hitachi Chemical Co., Ltd.)
92) 100 parts, 10 parts of 50X Paratoluene sulfonic acid and thinner (toluene/button) Measuring method of coating film properties (I) Impregnability: The cut surface was observed with a magnifying glass and the impregnated depth was determined with the naked eye.

(2) DuPont impact: Evaluated by dropping a soog load according to JIS K 5400.

(3) Hardness: Evaluated by pencil hardness (Mitsubishi Uni).

(Effects of the Invention) The composition for impregnating wood of the present invention has excellent impregnating properties compared to conventional paints, and has a high boiling point and is non-soluble, so it has good workability.

Furthermore, the resulting resin-impregnated wood has significantly improved impact resistance and hardness, and is therefore useful as a building material.

Danji X-\ , 2゛J+′

Claims (1)

[Claims] 1. General formula (I); ▲ Numerical formulas, chemical formulas, tables, etc. 6 alkylene group or an oxaalkylene group having a total number of carbon atoms of 4 to 6 in which two or more segments of an alkylene chain having at least 20 carbon atoms are bonded via an oxygen atom, R' is ▲ Formula, Chemical formulas, tables, etc. ▼, ▲Mathematical formulas, chemical formulas, tables, etc.▼ or ▲Mathematical formulas, chemical formulas, tables, etc.▼ (where n is 0 or 1) Compounds and curing agents are essential ingredients. A composition for impregnating wood comprising: 2.Claim 1 containing an organic peroxide as a curing agent
Composition for impregnating wood as described. 3. The composition for impregnating wood according to claim 1 or 2, further comprising a polyvalent metal salt and/or a polyvalent metal complex as an additive. 4. Resin-impregnated wood obtained by impregnating wood with the composition for impregnating wood according to claim 1, 2 or 3 and curing it. 5. A method for producing resin-impregnated wood, which comprises applying the composition for impregnating wood according to claim 1, 2, or 3 onto the surface of the wood, impregnating it, and curing it.