WO2006081755A1

WO2006081755A1 - Wood-modifying composition and method for its preparation, as well as its uses

Info

Publication number: WO2006081755A1
Application number: PCT/CN2006/000140
Authority: WO
Inventors: Wanli Chen; Ziliang Wu
Original assignee: Yang, Jun; Gao, Zhonghai
Priority date: 2005-02-07
Filing date: 2006-01-25
Publication date: 2006-08-10
Also published as: CN1644334A; CN100540244C

Abstract

A novel wood-modifying composition and a method for its preparation, as well as its uses are disclosed. The composition is made mainly from the following starting materials: 37% formaldehyde, borax, aqueous ammonia, urea, melamine, boric acid, cyanoguanidine phosphate, higher alkyl quaternary ammonium salt, sodium dodecyl sulfate, alkylphenol ether sulfosuccinate Na salt, decyl phenol polyoxyethylene ether, N-methylol acrylamide, butyl acrylate, styrene, isooctyl acrylate, acrylic acid, tert-dodecyl mercaptan, ammonium persulfate, sodium hydrogen carbonate, sodium metabisulfite, chlorinated paraffin having chlorine content of 50-60%, an microemulsion of silica which has solids content of 45% and/or an microemulsion of aluminum oxide hydrate which has solids content of 40%. The artificial forest woods and inferior woods modified by the invention composition have excellent flame-retarding, mothproofing, mildewproofing, and preservative properties in addition to the marked improved physical-mechnical properties. Morever, such drawbacks of prior art as that the existent wood preservatives often have heavy metal ions and other toxic components are overcomed.

Description

The invention relates to a wood modification composition, a preparation method thereof and a use thereof. The invention relates to a wood modification composition and a preparation method thereof, in particular to a modification composition applied to artificial wood and other low-grade wood. It belongs to the field of forestry and chemical industry. Background technique

The wood is densified and modified to increase its density, and the physical and mechanical properties such as hardness and strength are also increased, which is a feasible method for improving the quality of wood. For example, if an unsaturated olefin monomer or prepolymer is injected into the wood tissue, and then it is polymerized and solidified into wood-plastic composite material in the wood under the initiation of a thermal initiator or a heat radiation source (Zhu Wei, Guo Fengping. New Developments of Hemu Research[J] Journal of Northwest Forestry University, 1998, 13(4): 82~91; edited by Lu Wenda. Wood Modification Technology [M] Harbin: Northeast Forestry University Press, 1993; Feist WC, Rowell R M. Moisture sorption and accelerated weathering of acetylated and methacrylatedaspen [J] . Wood and Fiber Science, 1991, 23(1): 128~136); injecting soluble inorganic compounds into wood to form water-insoluble by chemical reaction Inorganic matter, deposited in the cell cavity or cell wall of wood to form a new composite material containing inorganic substances (Zhang Shuangbao, Zhou Yu, Zhao Li. Research on Wood Composites (I), (2) [J]. Chinese Wood, 1 1997.(3): 20~22, 2 1997.(4): 17~20; Liu Lei, Zhu Wei, Zhao Wei. Preliminary Study on the Treatment Process of Poplar I Inorganic Silicide Composites[J].Wood Industry, 2001, 15(3): 8~11; Ouyang Mingba. Wood size stabilizer Sexual treatment of wood [J]. Forestry Science and Technology Newsletter: 1995, (6): 28~30); or with water-soluble phenolic (PF), urea-formaldehyde (UF), melamine-formaldehyde (MF) and other resins and polyethylene glycol (PEG The treatment of wood with macromolecular organic compounds (Yu Jixue, Jin Zhongwei, He Wenyou. UFC aldehyde concentrate (UFC) modified poplar wood resistance and physical and mechanical properties [J] Wood Industry, 1989, 3 (3) : 1~4.; Kania S. Thermal conductivity of natural and modified wood [J]. Przemysl Przewny, 1990, 41(8): 17~20; Fang Guizhen, Li Shujun, Cui Yongzhi, et al. PF prepolymer to poplar Fixation of Compressive Deformation[J]. 林产化工通讯, 1998,(5): 16~19): There is also compaction treatment of wood (Sl kla S, Bhatnagar RCA note on the effect of compression on strength properties of Populus Deltoides and Populusciliata [J]. Journal of Timber Development Association of India. 1989, 35(1): 17-25; Zhang Daowei, Li Jiangtao, Zhu Jinmei. Application of Modification in Plywood [J]. Forestry Science and Technology Development, 1998(2): 8~10), etc. However, due to high processing cost, complicated equipment and process, unstable treatment liquid, easy curing and deterioration, the wood densification modification technology has not been widely applied.

Wood fire retardant and antiseptic treatment is an important part of wood protection. The wood should meet the flame retardant B1 grade flame retardant index in GB50222 "Fireproof Code for Interior Decoration Design of Buildings". According to the performance of wood flame retardants widely used at home and abroad, the feasible method is to use water-soluble impregnation to water-soluble. The flame retardant is injected into the interior of the wood. Commonly used flame retardants are: ammonium phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, ammonium polyphosphate, urea, melamine, dicyandiamide, borax, boric acid, etc. (Liu Yanji. One of the lectures on the burning and flame retardant of wood materials) Wood Industry, 1996, 10(6): 37~39). These flame retardants have a good flame retardant effect, especially the phosphorus-nitrogen-boron-based ternary flame retardant, and the flame retardant ability is stronger due to the synergistic effect of the three elements of phosphorus, nitrogen and boron. However, the disadvantage is that the flame retardant is only physically bonded in the wood, and is easily separated and has poor resistance to leaching. Therefore, the wood after the flame retardant treatment is easily damaged by moisture absorption and corrosion, and the flame retardant is easy to seep out the surface of the wood, which may cause the paint and adhesive properties of the wood to deteriorate; the anticorrosive wood suitable for civilian use, considering the home environment and the like. The impact of the ideal wood treatment preservatives are: 1 high efficiency and low toxicity, meet strict environmental requirements; 2 with anti-corrosion, anti-mildew and anti-mite effect; 3 with better anti-leak; 4 best colorless , basically does not change the color of the wood after use. Ammonia (S An) copper-soluble high-carbon alkyl quarter saddle salt ACQ wood anti-corrosion consisting of high-carbon alkyl quaternary ammonium salts, copper ions and ammonia (or amine) introduced in recent years!] (American Wood-preservers ' American Wood-preservers 'Association Standards, 2001. 135-190), which gives wood a good anti-corrosion, anti-mildew, anti-mite and anti-leakage properties, and overcomes the widely used arsenic or boron and chromium in the past. The wood-based preservative composed of copper and inorganic materials has the disadvantages of high toxicity and anti-corrosion wood waste, but it still uses heavy metal copper ions (although its toxicity is lower than that of arsenic and chromium), it will still cause certain problems to the environment and people. Harm, and the public's fear of heavy metal hazards is ingrained. In addition, due to the strong alkalinity of the preservative, it is highly corrosive to wood-modified equipment and has a certain destructive effect on wood fibers.

The medium and high-grade timber resources used in the timber industry, decoration industry, construction industry and other industries are increasingly scarce, and the protection of resource forests and ecological forests has been recognized by all countries in the world. Therefore, artificially cultivated fast-growing and high-yield forests (plantation forest) are used instead of resources. Forests and ecological forest wood are the general trend. However, due to the short growth period of plantation wood, most of them have loose wood, low density, poor processing performance and long service life.

2 Short shortcomings. Therefore, the densification and modification of artificial forest materials and other low-grade woods can improve the physical and mechanical properties such as density, hardness and strength, and can be used as medium and high-grade wood to replace precious wood to meet industrial production and people's living needs. Is one of the effective ways to resolve conflicts.

Wood, flammable and mildew, decay, insects (especially plantation wood), can be deformed or damaged by the atmosphere and other factors, affecting the appearance, reducing the strength and even losing the value of use. Anti-corrosion and flame-retardant treatment of wood is an effective measure to avoid, reduce the degradation of wood caused by the above reasons, extend the life cycle of wood products, or reduce the risk of fire.

The densification and modification of common woods, especially artificial forest materials and other low-grade woods, has the disadvantages of high cost, complicated process and high equipment requirements. The obtained densified modified material has a single function and generally cannot be used as a flame retardant wood or a preservative wood, and can not be used as a flame retardant and anticorrosive (both flame retardant and anticorrosive) wood. The applicant's prior invention patent application (Application No. 03107131. 7) discloses a water-soluble resin for post-treatment of wood, which comprises acrylamide, decyl alcohol, formaldehyde, urea-containing hydrazine group compound, polyhydroxy organic compound, phosphoric acid, ammonia water. It is synthesized. The resin modified with the resin can greatly improve the density, hardness and strength of the wood, and has good flame retardant resistance to degradation, and has the advantages of low cost, relatively simple process and equipment, and the like. When the hardness and strength of the wood are high, the densification and reinforcement of the resin are still insufficient. Further, the anticorrosive property of the treated material of the water-soluble resin is not sufficiently remarkable.

The wood modification treatment liquid containing water-soluble silicate such as water glass as the main component has low cost, and the obtained wood-inorganic silicide composite material has high hardness and strength, and has certain flame retardant and anti-mite properties. However, this treatment material has strong moisture absorption, indicating that it is easy to permeate alkali. Due to the strong alkalinity of the water-soluble silicate, the potential damage to the wood fiber cannot be neglected. The combination of metal calcium, magnesium, iron and the like forms a metal ion-silicate poorly soluble substance. Although the surface infusion can be well fixed, the depth and uniformity of the infiltration permeation are questionable.

The high carbon alkyl quaternary ammonium salt (ammonyx) gives the wood the desired corrosion protection. It is used in small amounts and is safe to use, but it is water-soluble. It is seriously drained when it is treated with infusion of wood alone, and is not particularly suitable for outdoor use. Therefore, high-carbon alkyl quaternary ammonium salts are often used together with heavy metal ions such as copper to form stable high-carbon decyl quaternary ammonium salt-heavy metal complexes to achieve leaching resistance. However, the long-term, large-scale use of heavy metal ions can cause irreversible pollution and harm to both the human body and the surrounding environment. Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide an environmentally-friendly wood modification capable of significantly enhancing wood density, loss-resistant flame retardant, anti-mite, mildewproof and anti-corrosion properties without heavy metal ions. Use the composition.

The technical problem to be solved by the present invention is achieved by the following technical means:

A wood modification composition, which is mainly made of the following raw materials by weight:

37% formaldehyde 400~500 parts, borax 30~40 parts, ammonia water 5~40 parts, urea 150~195 parts, melamine 50~85 parts, boric acid 10~15 parts, dicyandiamide 80 / ulOO parts, high carbane 10~18 parts of base quaternary ammonium salt, 3~6 parts of sodium dodecyl sulfate, 10~18 parts of alkylphenol ether sulfosuccinate sodium salt, 10~18 parts of nonylphenol ethoxylate, N- 4 to 6 parts of methylol acrylamide, 100 to 125 parts of butyl acrylate, 300 to 320 parts of styrene, 130 to 150 parts of isooctyl acrylate, 4 to 6 parts of acrylic acid, 0.15 to 0.2 parts of t-dodecyl mercaptan, 2.5 to 3 parts of ammonium persulfate, 1 to 3 parts of sodium hydrogencarbonate, 0.8 to 1 part of sodium metabisulfite, 20 to 25 parts of chlorinated paraffin containing 50 to 60% of chlorine, silica microemulsion of 45 % solid content, and / or 40% solid content of hydrated aluminum oxide microemulsion 300~350 parts, 0~7 parts of phosphoric acid, 1800~2200 parts of water.

Preferably, it is: 37% of formaldehyde, 450 parts, borax 35 parts, 20 parts of ammonia water, 175 parts of urea, 65 parts of melamine, 12 parts of boric acid, 90 parts of dicyandiamide, 14 parts of high carbon alkyl quaternary ammonium salt, and 12 fluorenyl groups. 4.5 parts of sodium sulfate, 14 parts of nonylphenol sulfosuccinate sodium salt, 14 parts of nonylphenol ethoxylate, 5 parts of N-methylol acrylamide, 110 parts of butyl acrylate, 310 parts of styrene, 140 parts of isooctyl acrylate, 5 parts of acrylic acid, 0.18 parts of t-dodecyl mercaptan, 2.7 parts of ammonium persulfate, 2 parts of sodium hydrogencarbonate, 0.9 parts of sodium metabisulfite, 22 parts of chlorinated paraffin containing 50 to 60% of chlorine, 45% solids content of silica microemulsion and/or 325 parts of 40% solids hydrated alumina trioxide microemulsion, 3 parts of phosphoric acid, and 2000 parts of water.

The high carbon decyl quaternary ammonium salt is preferably dodecyldimethylbenzylammonium chloride, didecyldimethylammonium chloride or a combination of the two.

All of the materials used in the present invention are commercially available and are manufactured to industry standards. In the technical solution of the present invention, the high-carbon alkyl quaternary ammonium salt and the sodium lauryl sulfate, the nonylphenol ether sulfosuccinate nano salt and the nonylphenol polyoxyethylene ether three water-soluble organic-inorganic macromolecules The substance is compatible and prepared as a mixed emulsifier, which can be protected with the following components in the formulation. Glue (preparation method see below) miscible: 37% formaldehyde, borax, ammonia, urea, melamine, boric acid, dicyandiamide,

The water-soluble organic-inorganic macromolecular substance contained in the wood modifying composition of the present invention, when the water of the composition is volatilized, the long-chain macromolecule is further cross-linked, enlarged to become a polymer substance, solidified in the wood, and wood The structure is tightly combined, and the polymer material is insoluble in water, non-corrosive, and light in color after curing, so that the densified wood has good weather resistance and service life, and the flame retardant component and antiseptic component in the wood can also be It is well fixed and is not easily leached by water or moisture, which means it is resistant to loss. Specifically, the styrene-acrylate copolymer microemulsion (the microemulsion particle size is mostly smaller than the common emulsion but slightly larger than the colloidal semi-colloid half emulsion) is added to the wood modification composition of the present invention. The aqueous dispersion of macromolecular inorganic particles, such as hydrated silica microemulsion and/or hydrated aluminum oxide microemulsion, is sufficiently small to further enhance the densification and reinforcement effect on wood.

In the synthesis of styrene-acrylate copolymer microemulsion, in order to make the particle size of the microemulsion small enough, the protective rubber is prepared from the following raw materials by weight: 37% formaldehyde 400-500 parts, borax 30~40 parts, ammonia water 5 to 25 parts, 150 to 195 parts of urea, 50 to 85 parts of melamine, 10 to 15 parts of boric acid, and 80 to 100 parts of dicyandiamide are used in large amounts. The microemulsion particle size of the hydrated silica microemulsion and the hydrated alumina trioxide microemulsion is sufficiently small to be used in a commercially available product having a translucent appearance and a blue fluorescence.

The hydrated silica microemulsion and the hydrated aluminum oxide microemulsion itself are vitrified when the water volatilizes, that is, they are coagulated and solidified into a glassy solid, insoluble in water, and have high hardness and strength. When used in combination with a styrene-acrylic copolymer microemulsion, an inorganic-organic glass body is formed after vitrification, so that the hardness and strength of the modified wood are greatly increased.

The flame retardant component in the wood modifying composition of the present invention is a P-N-B type ternary high-efficiency flame retardant. Among them, P (phosphorus) and N (nitrogen) are added in the form of nitrogen-containing organic matter, nitrogen-phosphorus organic substance, phosphoric acid and ammonia water, and B (boron:) is added in the form of boric acid or sodium borate. Another role of B is to have a good anti-mite effect and a certain anti-corrosion effect on wood.

The water-soluble macromolecular substance, the flame-retardant component, and the antiseptic component in the wood-modifying composition of the present invention are not only simple mechanical mixing. The flame retardant component may be contained in a water-soluble macromolecule or, at the same time, phosphoric acid, boric acid, ammonia water, and borax as a catalyst (acid-base regulator:) in synthesizing a macromolecular substance. The antiseptic component of the high carbon decyl quaternary ammonium salt is used as part of the surfactant used in the composition to stabilize or The action of emulsifying water-soluble macromolecules is stabilized in the composition of weakly acidic rather than alkaline due to the coexistence of other surfactants, avoiding the use of high-carbon alkyl quaternary ammonium wood preservatives such as ACQ. The modified equipment is highly corrosive and has the disadvantage of destroying wood fibers.

The wood modifying composition of the present invention is colorless after drying and solidifying. If the color of the wood is to be changed, a wood coloring agent can be added to the composition to obtain a uniform color, fully permeable dyeing material.

Another technical problem to be solved by the present invention is to provide a process for preparing the wood modifying composition of the present invention, which is as follows:

1) Weigh each raw material according to the following weight ratio:

37% formaldehyde 400-500 parts, borax 30~40 parts, ammonia water 5~40 parts, urea 150~195 parts, melamine 50-85 parts, boric acid 10~15 parts, dicyandiamide 80~100 parts, high carbon 垸10~18 parts of base quaternary ammonium salt, 3~6 parts of sodium dodecyl sulfate, 10~18 parts of nonylphenol sulfosuccinate sodium salt, 10~18 parts of nonylphenol ethoxylate, N- 4 to 6 parts of methylol acrylamide, 100 to 125 parts of butyl acrylate, 300 to 320 parts of styrene, 130 to 150 parts of isooctyl acrylate, 4 to 6 parts of acrylic acid, 0.15 to 0.2 parts of t-dodecyl mercaptan, 2.5-3 parts of ammonium persulfate, 1 to 3 parts of sodium hydrogencarbonate, 0.8 to 1 part of sodium metabisulfite, 20 to 25 parts of chlorinated paraffin containing 50 to 60% of chlorine, 45% solid content of silica microemulsion and I or 40% solid content of hydrated alumina trioxide microemulsion 300~350 parts, phosphoric acid 0-7 parts, water 1800~2200 parts,

2) Preparation of protective glue: Add formaldehyde and borax to the reaction kettle, adjust pH=8-8.5 with ammonia water, then add urea and melamine, heat up to 92-95 °C, keep warm for 0.5~1.5 hr, cool down to 70+5, C, add boric acid, heat for 15-30min, add dicyandiamide and then keep it for 15-30min, adjust the pH of the material with boric acid or ammonia water: 5.8-6.2, cool down to 45~55 °C, ready for use.

3) Preparation of mixed emulsifier: Mixing high-carbon alkyl quaternary ammonium salt, sodium lauryl sulfate, alkylphenol ether sulfosuccinate nano salt and nonylphenol polyoxyethylene ether,

4) Synthesis of pre-emulsified monomer: water of 1 14 by weight, mixed emulsifier of 2 I 3 of total weight, and N-methylol acrylamide are added to the reaction vessel and stirred uniformly, and the mixed monomer is placed. Butyl acrylate, styrene, isooctyl acrylate, acrylic acid and tert-dodecyl mercaptan are stirred to make a uniform emulsion.

5) Emulsion synthesis: Add protective glue, water of 1 I 10 total weight and mixed emulsifier of 1 I 3 to the total weight of the reactor, raise the temperature to 82~88 ° C, add ammonium persulfate, pre-emulsified monomer Ammonium sulfate, Sodium bicarbonate, tempered at 85-95 Torr for 1~1, 5hr, cooled to 60~70 °C with sodium metabisulfite, continue to cool down, add chlorinated paraffin at a temperature of 50~55 °C, at a temperature of 40~45° C add 1 / 2 of the total weight of water, adjust the pH = 6.0 ± 0.5 with ammonia or phosphoric acid, add silica microemulsion and I or hydrated aluminum oxide microemulsion, stir evenly and then add the rest of the water to the combination The total solid content of the material is 35-45wt, which is obtained by discharging through a 250 mesh screen.

In the existing wood preservative technology, high-carbon alkyl quaternary ammonium salts are often used together with heavy metal ions such as copper to form a stable high-carbon quaternary ammonium salt-heavy metal complex to obtain leaching resistance.

In the present invention, three high-carbon alkyl quaternary ammonium salts are combined with sodium lauryl sulfate, alkylphenol ether sulfosuccinate nanosalt and nonylphenol polyoxyethylene ether. Compatibility, prepared as a mixed emulsifier, the prepared mixed emulsifier can be effectively miscible with the protective adhesive. After curing, the high-carbon alkyl quaternary ammonium salt can be stably combined with the protective rubber to achieve the same compatibility with the heavy metal. The anti-leak effect overcomes the shortcomings of existing ACQ and CCA wood preservatives containing heavy metal ions and other toxic components that cause pollution to the human body and the surrounding environment. Therefore, the wood modifying composition of the present invention not only has excellent anticorrosive properties, but also overcomes the drawbacks of the conventional wood preservatives which generally contain heavy metal ions and other toxic components.

The wood modification composition of the invention is prepared by using a general wood flame-retardant or anti-corrosion treatment tank, and the wood density is increased by 0.1-0.3 g I cm ³ after one dipping and drying, followed by hardness, Strength and other physical and mechanical properties are also improved by 60-120%. For higher density and better hardness and strength, more than two times of infusion can be performed. In addition, defects such as cracking and deformation during drying and use of wood are effectively avoided or reduced. Moreover, the wood has an ideal anti-leakage flame retardant, anti-mite, anti-mildew and anti-corrosion function, and its flame retardant ability reaches the "B1 grade flame-retardant material" of GB8624 standard, and the anti-corrosion ability is comparable with ACQ anti-corrosion wood.

The wood modified with the wood modification composition of the present invention (this treatment material) is compared with the ACQ anticorrosive treatment material and the ammonium polyphosphate monoboric acid flame retardant treatment material, and the leaching resistance is performed by running water soaking method (room temperature water immersion 24 hr, 103 The results were as follows: The average weight loss of the treated materials was 0.37%, the average weight loss of the ACQ anticorrosive treated materials was 1.72%, and the average weight loss of the ammonium polyphosphate-boronic acid flame retardant treated materials was 4.79%. Soaked in still water. The method (the sample is equal in weight, and immersed in water of 5 times sample weight for 72 hr, respectively) to determine the leaching amount of the high carbon sulfhydryl quaternary ammonium salt of the treated material and the ACQ preservative treated material, and the result is as follows: the high carbon alkyl quaternary ammonium salt leaching of the treated material The amount is 0.0072g IL, ACQ anti-corrosion treatment material high carbon alkyl quaternary ammonium salt dip The yield was 0.0471 g IL. Therefore, it can be considered that the treated material has good resistance to bleed.

The modified wood produced by using the wood modifying composition of the invention has good processing performance and can be used as a raw material for solid wood furniture, solid wood flooring, solid wood doors, solid wood decoration, etc. instead of medium and high grade wood. Its moisture absorption is basically the same as that of ordinary wood, and it can be used as a fabric. The modified wood has no odor and is safe to use. When the composition is dye-free, the color of the modified wood is basically the same as that of the log, and the dye can be used to obtain wood of various colors. detailed description

The invention is further described by the following examples, which are intended to be illustrative only and not to limit the scope of the invention.

Example 1

Synthesis of protective glue:

Add 37% formaldehyde 500kg, borax 40kg to the reaction kettle, adjust pH=8 with ammonia water, then add 190kg of urea and 80kg of melamine, heat up to 92°C, keep warm for about lh, cool down to 65'C, add 14kg of boric acid, keep warm for 15min Add 100 kg of dicyandiamide and keep warm for 20 min. Adjust the pH of the material with ammonia water to 5. 8. Cool down to about 50 °C.

Preparation of mixed emulsifier: 15kg of dimethyl dimethyl ammonium chloride, 4kg of sodium lauryl sulfate, 13kg of alkylphenol ether sulfosuccinate sodium salt and 13kg of nonylphenol ethoxylate are uniformly mixed. Got it.

Pre-emulsified monomer synthesis: 500kg water, mixed emulsifier 30kg, methacrylamide

6kg was added to the reaction kettle and stirred evenly. 110 kg of butyl acrylate, 320 kg of styrene, 150 kg of isooctyl acrylate, 5 kg of acrylic acid and 0.15 kg of molecular weight regulator t-dodecyl mercaptan were placed in a mixed reactor, and stirred for 30 min to make a uniform emulsion. , pump into the high tank for standby;

5公斤 (5kg first). 5kg (5kg first). 5kg (first use 5kg) The water was dissolved well. After 5 minutes, the pre-emulsified monomer was slowly added dropwise to the reaction vessel. After 25 minutes, the initiator solution (2.2 kg of ammonium persulfate, 2 kg of sodium hydrogencarbonate, 45 kg of water, and pre-dissolved) was added dropwise. After the pre-emulsified monomer is added, all the initiator solution that has not been added is added, and then kept at about 88 ° C for 1.5 hr, and the temperature is lowered to 65 ° C. The second initiator sodium sulfite is added, and the temperature is continued. Add 50kg of chlorinated paraffin containing 52% chlorine at 50~55°C, and add 1000kg of water at 40~45 °C. Ammonia water adjustment pH = 6.5, adding 40% solid content of hydrated aluminum oxide microemulsion 300kg, after mixing evenly, add the remaining water to the total solid content of the composition is 35~45%, through 250 mesh sieve output A half-transparent blue-fluorescent emulsion is the composition for wood modification of the present invention.

Using a general wood fire-retardant or anti-corrosion treatment tank, the composition prepared in the present embodiment is immersed into wood by a full cell method, and dried to become a densified material having greatly improved physical and mechanical properties such as density, hardness, strength, and wood. It has ideal anti-leakage flame retardant, anti-mite, anti-mildew and anti-corrosion functions.

Example 2

Synthesis of protective glue:

Add 37kg of formaldehyde and 35kg of borax to the reaction kettle, adjust pE 8.5 with ammonia water, then add 160kg of urea and 60kg of melamine, and raise the temperature to 92° (:, keep warm for about 1hr, cool down to 70.5 °C, add boric acid 12kg, keep warm for 30min Add 90kg of dicyandiamide and keep it for 30min. Adjust the material pH=6.2 with boric acid and cool down to about 50°C.

Preparation of mixed emulsifier: 18kg of dodecyldimethylbenzylammonium chloride, 6kg of sodium dodecyl sulfate, 13kg of alkylphenol ether sulfosuccinate sodium salt and 13kg of nonylphenol ethoxylate Mix evenly.

Synthesis of pre-emulsified monomer: 500kg of water, 33.5kg of mixed emulsifier and 5kg of N-methylol acrylamide were added to the reaction kettle and stirred evenly. 110kg of butyl acrylate, 300kg of styrene, and isobutyl acrylate were mixed. Ethyl ester 145kg, acrylic acid 5kg and molecular weight regulator t-dodecyl mercaptan 0.2kg, stirred for 30min to become a uniform emulsion, pumped into the high tank for standby;

Emulsion synthesis: Add 250kg of water, 250kg of water and 16.5kg of another mixed emulsifier prepared in the above steps, start the mixer, start the mixer, raise the temperature to 88 °C, add 0.5kg of the initial initiator ammonium persulfate (5kg first) The water was dissolved well. After 5 minutes, the pre-emulsified monomer was slowly added dropwise to the reaction vessel. After 25 minutes, the initiator solution (2.5 kg of ammonium persulfate, 2 kg of sodium hydrogencarbonate, 45 kg of water, and pre-dissolved) was added dropwise. After the pre-emulsified monomer is added, all the initiator solution not added is added, and then kept at about 88 ° C for 1.5 hr, cooled to 65 ° C plus a second initiator sodium metasulfite 0.8 kg, continue to cool, when the temperature Add 50kg of chlorinated paraffin with 52% chlorine content at 50-55°C, add 1000kg of water at 40-45°C, adjust pH=6.0 with phosphoric acid, add 320kg of silica microemulsion with 45% solid content. After stirring evenly, the remaining water is added to the total solid content of the composition of 35 to 45%, and the half-transparent blue-fluorescent emulsion is discharged through the 250 mesh sieve, which is the wood modification composition. Using a general wood fire-retardant or anti-corrosion treatment tank, the composition prepared in the present embodiment is immersed into wood by a full cell method, and dried to become a densified material having greatly improved physical and mechanical properties such as density, hardness, strength, and wood. It has ideal anti-dusting flame retardant, anti-mite and function. Synthesis of protective glue:

Add 37kg of formaldehyde to 450kg, borax 35kg, adjust pH=8.3 with ammonia water, then add 175kg of urea and 65kg of melamine, heat up to 95°C, keep warm for about 1hr, cool down to 70°C, add boric acid 12kg, keep warm for 20min Add 90kg of dicyandiamide and keep it for 20min. Adjust the pH of the material with ammonia water to 6.0, and cool down to about 50 °C.

Preparation of mixed emulsifier: 8kg of dodecyldimethylbenzylammonium chloride, 7kg of dimercaptodimethylammonium chloride, 6kg of sodium lauryl sulfate, and nonylphenol succinate 17 kg of salt and 17 kg of nonylphenol ethoxylate are uniformly mixed.

Pre-emulsified monomer synthesis: 500kg water and pre-dispersed wood dye, mixed emulsifier 37kg, N-light methacrylamide 5kg into the reaction kettle and stirred evenly, put the mixed monomer butyl acrylate 110kg, benzene 310kg of ethylene, 140kg of isooctyl acrylate, 5kg of acrylic acid and 0.18kg of molecular weight regulator t-dodecyl mercaptan, stirred for 30min to become a uniform emulsion, pumped into the high tank for standby;

Emulsion synthesis: Add 250kg of water, 250kg of water and another part of mixed emulsifier, which are synthesized in the above steps, into the reaction kettle, start the mixer, heat up to 85 °C, add 0.5kg of ammonium persulfate as primer (5kg water first) After dissolution, the pre-emulsified monomer was slowly added dropwise to the reaction vessel after 5 minutes. After 25 minutes, the initiator solution (2.5 kg of ammonium persulfate, 2 kg of sodium hydrogencarbonate, 45 kg of water, and pre-dissolved) was added dropwise. After the pre-emulsified monomer is added, all the initiator solution that has not been added is added, and then kept at about 88 ° C for 1.5 hr, and cooled to 65 ° C plus a second initiator of sodium metasulfite 0.9 kg, continue to cool, when the temperature Add 50kg of chlorinated paraffin with 52% chlorine content at 50~55°C, add 1000kg of water at 40~45°C, adjust pH=6.0 with phosphoric acid, add 325kg of silica microemulsion with 45% solid content. After stirring evenly, the remaining water is added to the total solid content of the composition of 35 to 45%, and the half-transparent blue-fluorescent emulsion is discharged through the 250 mesh sieve, which is the wood modification composition.

Claims

1. A composition for wood modification, which is mainly prepared from the following raw materials by weight:

37% formaldehyde 400~500 parts, borax 30~40 parts, ammonia water 5~40 parts, urea 150~195 parts, melamine 50-85 parts, boric acid 10~15 parts, dicyandiamide 80~100 parts, high carbane 10~18 parts of quaternary ammonium salt, 3~6 parts of sodium lauryl sulfate, 10~18 parts of nonylphenol sulfosuccinate sodium salt, nonylphenol ethoxylate 10~: 18 parts, N - 4 to 6 parts of methylol acrylamide, 100 to 125 parts of butyl acrylate, 300 to 320 parts of styrene, 130 to 150 parts of isooctyl acrylate, 4 to 6 parts of acrylic acid, 0.15 to 0.2 of tert-dodecyl mercaptan a portion, 2.5 to 3 parts of ammonium persulfate, 1 to 3 parts of sodium hydrogencarbonate, 0.8 to 1 part of sodium metabisulfite, 20 to 25 parts of chlorinated paraffin containing 50 to 60% of chlorine, and silica fine of 45 % solid content 300 to 350 parts of emulsion and I or 40% solid content hydrated alumina trioxide microemulsion, 0 to 7 parts of phosphoric acid, and 1800 to 2200 parts of water. begging

2. A wood modifying composition according to claim 1, wherein the parts by weight of each raw material are: 37 parts of formaldehyde, 450 parts, 35 parts of borax, 20 parts of ammonia water, 175 parts of urea, 65 parts of melamine, 12 parts of boric acid, 90 parts of dicyandiamide phosphate, 14 parts of high carbon alkyl quaternary ammonium salt, 4.5 parts of sodium dodecyl sulfate, 14 parts of alkylphenol ether sulfosuccinate nano salt, 14 parts of nonylphenol ethoxylate, 5 parts of N-methylol acrylamide, 110 parts of butyl acrylate, 310 parts of styrene, 140 parts of isooctyl acrylate, 5 parts of acrylic acid, 0.18 parts of t-dodecyl mercaptan, 2.7 parts of ammonium persulfate, sodium hydrogencarbonate 2 Parts, 0.9 parts of sodium metabisulfite, 22 parts of chlorinated paraffin containing 50 to 60% of chlorine, SiO2 microemulsion of 45 % solid content and/or 325 parts of hydrated alumina trioxide microemulsion of 40% solid content, phosphoric acid 3 parts, 2000 parts of water.

A wood modifying composition according to claim 1, wherein: said higher alkyl quaternary ammonium salt is selected from the group consisting of dodecyl dimethyl benzyl ammonium chloride and/or dimercapto dimethyl hydride. Ammonium chloride.

4. A method of preparing the wood modifying composition of claim 1 wherein the steps are as follows:

1) Weigh each raw material according to the following weight ratio:

37% formaldehyde 400~500 parts, borax 30~40 parts, ammonia water 5~40 parts, urea 150~195 parts, melamine 50~85 parts, boric acid 10~15 parts, dicyandiamide 80~100 parts, high carbon 垸10~18 parts of base quaternary ammonium salt, 3~6 parts of sodium lauryl sulfate, 10~18 parts of nonylphenol ether sulfosuccinate nano salt, 10~18 parts of nonylphenol ethoxylate, N- 4 to 6 parts of methylol acrylamide, 100 to 125 parts of butyl acrylate, 300 to 320 parts of styrene, 130 to 150 parts of isooctyl acrylate, and C 4 to 6 parts of enoic acid, 0.15 to 0.2 parts of t-dodecyl mercaptan, 2.5 to 3 parts of ammonium persulfate, 1 to 3 parts of sodium hydrogencarbonate, 0.8 to 1 part of sodium metabisulfite, and chlorination of 50 to 60% of chlorine. Paraffin wax 20~25 parts, 45% solid content silica microemulsion and/or 40% solid content hydrated alumina trioxide microemulsion 300~350 parts, phosphoric acid 0~7 parts, water 1800~2200 parts,

2) Preparation of protective glue: Add formaldehyde and borax to the reaction kettle, adjust pH=8~8.5 with ammonia water, then add urea and melamine, heat up to 92~95 °C, keep warm for 0.5~1.5hr, cool down to 70±5° C, add boric acid, keep warm for 15~30min, add dicyandiamide phosphate and keep warm for 15~30min, adjust the pH of the material with boric acid or ammonia water=5.8~6.2, cool down to 45~55°C for discharge,

3) Preparation of mixed emulsifier: Mixing high-carbon decyl quaternary ammonium salt, sodium lauryl sulfate, nonylphenol ether sulfosuccinate nano salt and nonylphenol ethoxylate ether,

4) Synthesis of pre-emulsified monomer: water, 1 14 of the total weight of the mixed emulsifier, N-methylol acrylamide is added to the reaction vessel and stirred uniformly, and the mixed monomer is placed. Butyl acrylate, styrene, isooctyl acrylate, acrylic acid and tert-dodecyl mercaptan are stirred to make a uniform emulsion.

5) Emulsion synthesis: Add protective glue, water of about 1 I 10 total weight and mixed emulsifier of total weight 1 I 3 into the reaction kettle, raise the temperature to 82~88 ° C, add ammonium persulfate, pre-emulsifying single Body, ammonium sulfate, sodium bicarbonate, heat at 85~95 °C for 1~1.5hr, cool to 60~70 °C and add sodium metabisulfite, continue to cool down, add chlorinated paraffin when the temperature is 50~55 °C, Add 40/45 ° C to the total weight of 1/2 of water, adjust the pH to 6.0 ± 0.5 with ammonia or phosphoric acid, add silica microemulsion and I or hydrated aluminum oxide microemulsion, stir evenly and then make up The remaining water is added to the total solids content of the composition of 35 to 45 wt%, which is obtained by passing through a 250 mesh screen.

Use of the wood-modifying composition according to any one of claims 1 to 3 for wood modification or wood processing.

6. Use according to claim 5, characterized by the use in the modification of artificial timber and other low-grade wood.