KR101392725B1 - Water-basesd fireproofing coating composition, method of preparing fireproofing wood, and fireproofing wood thereof - Google Patents

Abstract

The present invention relates to a water-soluble flame retardant solution forming a fine film since an absorption rate is high without the generation of efflorescence or dew condensation on the surface of wood, a flame retardant processing method for wood and flame retardant wood thereby. The flame retardant solution of the present invention is an environmentally-friendly flame retardant solution which does not use organic compounds harmful to human bodies such as a phenol based resin, chloroparaffin and the like and is able to prevent indoor air pollution caused by processing products. Additionally, the water-soluble flame retardant solution of the present invention is able to maintain natural wood incense and temperature and humidity control functions which are the intrinsic characteristics of wood by minutely forming a film since the absorption rate is high. The flame retardant wood of the present invention has antifungal and antifreezing functions without efflorescence or dew condensation.

Description

FIELD OF THE INVENTION [0001] The present invention relates to wood flame retardant, water-soluble flame retardant, wood flame retardant, flame retardant wood, flame retardant wood,

FIELD OF THE INVENTION The present invention relates to a water-soluble flame retardant, a flame-retardant processing method for wood, and a flame retardant wood. More particularly, the present invention relates to a water-soluble flame retardant, a method for treating flame-retardant wood, and a flame-retardant wood by which a whitening phenomenon or a condensation phenomenon does not occur on the surface of wood and a water absorption rate is high to form a microcapsule.

Wood, plywood, medium density fiberboard, paper, etc. are widely used as furniture and building interior materials. Wood is decomposed into wood or wood gas by heating, and inflammable wood gas is oxidized, burning the building in an instant, causing damage to property and human life. Therefore, effective flame retarding and flame retarding treatment are required.

BACKGROUND ART [0002] Wood-related flame retardant compositions consist of a halogen-based flame retardant, a phosphorus flame retardant, a mixture of an inorganic flame retardant and a polymer, and are coated on the surface of the donor body.

The conventional flame retardant or flameproofing composition imparts flame retardancy by forming a flame retardant coating on the surface of the wood. In the formation of the flame retardant coating film, the absorption of the flame retardant composition is extremely small in the coated body and the drying speed of the coating film is very slow, There is a problem that the coating film is cracked when left for a long time. In order to solve such a problem, a two-liquid type coating material having a high hardening speed is also used, and a volatile substance such as thinner is used as a diluting agent, thereby causing indoor air quality contamination.

In addition, conventional flame retardant or flame retardant agent forms a relatively thick film by coating type to delay the spreading of flames during a fire, and when some flame retardant liquid is applied to the surface of wood, after a predetermined period of time, As a result, dew condensation occurs, and when condensation hardens, whitening occurs.

Korean Patent No. 10-644770 discloses a transparent flame retardant coating composition having improved flame retardancy, and a chlorine rubber resin, a phenolic resin, a polyester resin, a chlorinated paraffin, and an organic solvent are used. There is a problem that the resin contains a large amount of a toxic compound such as wastewater or paraffin harmful to human body in an organic solvent.

It is an object of the present invention to provide a water-based flame retardant solution which minimizes the use of harmful substances to human body.

Another object of the present invention is to provide a water-soluble flame retardant solution having a high water absorption rate of flame-retarding solution and a high drying speed when forming a coating film.

Another object of the present invention is to provide flame retardant wood which does not cause whitening or condensation on the surface of wood.

According to one aspect of the present invention,

 A phosphorus flame retardant, a guanidine-based compound, and an acrylic polyol.

According to another aspect of the present invention,

The present invention relates to a wood flame retarding process comprising the steps of providing a dried wood, applying wood with the water-soluble flame retardant, and drying the wood.

Another aspect of the present invention relates to a flame retardant wood applied with the above water-soluble flame retardant.

The water-soluble flame retardant of the present invention is an environmentally friendly flame retardant solution that reduces the use of organic compounds such as phenolic resin and chlorinated paraffin which are harmful to the human body, and can prevent indoor air pollution. Further, the water-soluble flame retardant of the present invention has a high water absorption rate and thus can finely form a coating film, so that it can maintain temperature and humidity control characteristics and natural wood aroma, which are characteristics inherent in wood. In addition, the flame retardant wood of the present invention is free from whitening and yellowing, and has antifungal and anti-freezing properties.

Further, the flame retardant of the present invention is quick in drying and has a high water absorption rate, which can save working time in the field.

Fig. 1 shows the flame retardancy evaluation result according to the flame retardant application amount.

The present invention can be all accomplished by the following description. The following description should be understood to describe preferred embodiments of the present invention, but the present invention is not necessarily limited thereto.

The water-soluble flame retarding solution of the present invention includes a phosphorus flame retardant, a guanidine-based compound and an acrylic polyol.

The flame retardant may further include a phosphonic acid as a catalyst.

The phosphorus flame retardant may be a phosphorus-containing polymer having a carbon atom. The phosphorus-based flame retardant may be phosphoric acid, ammonium phosphate, ammonium polyphosphate, phosphorus polymer, phosphoric acid urea, urethane phosphoric acid compound or phosphoric acid compound.

The phosphoric acid may be used as a catalyst rather than a flame retardant function to dissolve a phosphorus flame retardant.

Examples of the guanidine-based flame retardant include guanidine, guanidine sulfamate, and guanidine phosphate.

The phosphorus flame retardant is a polymer in which phosphorus and nitrogen are bonded, has excellent adhesive strength, is easy to crosslink, and has a high flame retardancy. In addition, the phosphorus flame retardant having a carbon atom is dried and adhered to fine pores such as cell lumen and cell gap in the wood, and even if it remains on the surface of the wood, whitening does not occur, so that adhesion, painting and appearance are not affected.

The phosphorus flame retardant and the guanidine compound may partially react with each other to form a guanidine phosphate compound.

The guanidine phosphate compound is adsorbed on fine pores in the wood and remains on the surface to prevent the occurrence of whitening.

The flame retardant may be 10 to 70 parts by weight of a phosphorus flame retardant, 5 to 30 parts by weight of phosphoric acid, and 2 to 30 parts by weight of a guanidine flame retardant per 100 parts by weight of water.

The acrylic polyol is used for the formation of a microfilm and the promotion of drying. The acrylic polyol may have a weight average molecular weight of 10,000 to 40,000 and can be cured at room temperature. The acrylic polyol resin is preferably contained in an amount of 2 to 20 parts by weight based on 100 parts by weight of water. If the content of the acrylic polyol resin in the total composition is less than 2 parts by weight, quick drying becomes difficult and moisture resistance is lowered. When the content of the acrylic polyol resin exceeds 20 parts by weight, the flame retardancy is lowered and there is a problem of forming a thick coating film.

The flame retardant may further contain 1 to 5 parts by weight of ethylene glycol per 100 parts by weight of water. Examples of the water soluble glycols usable in the present invention include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, trimethylene glycol, propylene glycol, butanediol, pentanediol, neopentyl glycol, hexamethylene glycol, dodecamethylene glycol Etc., preferably ethylene glycol. As the water-soluble glycols, a polymer resin may also be used. Examples thereof include polyethylene glycol, poly (styrene glycol) (meth) acrylate, poly (styrene glycol diacrylate), diethylene glycol diglycidyl ether, polypropylene glycol Methacrylate, and the like. The water-soluble glycols preferably have a molecular weight of 1,000 or less, more preferably 500 or less.

The water-soluble glycols can prevent the water-soluble flame retardant from evaporating, soften the wood, impregnate the inside of the wood to improve the dimensional stability of the wood, and also provide a function as a cryoprotectant to prevent the water-soluble flame retardant from being frozen during the winter season.

The flame retardant of the present invention may contain other additives.

Other additives may further include 1 to 5 parts by weight of antimicrobial agent, preservative, coloring agent, aromatic agent, etc. based on 100 parts by weight of water. In addition, it may contain an inorganic component such as porous alumina, silica gel, calcium chloride and the like which can perform a humidifying function.

The flame retardant of the present invention can remarkably improve the dew condensation and whitening phenomenon by using the guanidine compound and the phosphoric acid flame retardant at the same time, and by using the acrylic polyol, the drying of the flame retardant treated wood can be improved. In addition, the flame-retardant liquid used water as a solvent and minimized the use of chemical compounds harmful to the human body, thereby enhancing the environment-friendliness.

In another aspect, the present invention relates to a flame retarded product to which the flame retardant is applied. The flame retardant product is a product in which the above water-soluble flame retardant solution is applied to wood, paper, wallpaper, interior decoration agent, furniture, carpet, curtain or film. However, the product to which the flame retardant is applied is not limited to the flame retardant product mentioned above.

In another aspect, the invention relates to a process for treating wood flame retardants. The method includes providing a dry wood, applying the wood with the water-soluble flame retardant, and drying the wood.

The dried wood may have a water content of 15% or less, preferably 12% or less.

As the water-soluble flame retardant, the flame retardant described above may be used.

The application amount of the flame retardant is 30 to 300 g / m 2, preferably 100 to 150 g / m 2.

The drying step is preferably performed within 1 hour, preferably within 30 minutes.

The drying step is a step of drying the wood at room temperature and room temperature. The drying step can dry the wood at a moderate temperature of less than 100 degrees Celsius, for example, at a temperature greater than 0 degrees and less than 100 degrees Celsius, preferably 20 to 80 degrees Celsius, most preferably 20 to 60 degrees Celsius . Since yellowing may occur when the drying temperature is 70 ° C or higher, it is preferable to dry it at a middle temperature of 60 ° C or lower.

By the drying step, the water content of the resin-impregnated wood can be adjusted to 15%, preferably 12% or less.

As the water is evaporated through the drying step, the components of the resin for impregnating wood are present as solid (resin). Particularly, a guanidine phosphate compound produced by reaction of a phosphorus flame retardant and a part of a guanidine compound in a flame retardant resin composition is present in the interior of the wood or on the surface. The guanidine phosphate compound is adsorbed on fine pores in the wood and remains on the surface to prevent the occurrence of whitening.

The flame retardant of the present invention has excellent penetrability in the interior of wood, and can form a finer coat than conventionally flame retardant.

In another aspect, the present invention relates to fire resistant wood. The flame retardant wood comprises the flame retardant liquid solid content on the inside or on the surface thereof. The flame-retardant liquid solid component means a component remaining after evaporation of water in the water-soluble flame retardant liquid composition. As described above, the solid content includes a guanidine phosphate compound produced by reacting a phosphorus flame retardant and a part of a guanidine compound in the flame retardant resin composition.

The flame retardant wood according to the present invention can provide an excellent flame retardancy because the flame retardant remains on the inside or on the surface of the wood. Further, since the flame retardant film forms a fine film on the surface, the temperature and humidity control function of the wood can be maintained to some extent have.

Further, the flame retardant wood of the present invention can also have antibacterial and anti-freezing function.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the embodiments of the present invention can be modified in various ways, and the scope of the present invention is not limited by the embodiments.

Example  One

A flame retardant solution was prepared at a ratio of 1,000 g of water, 70 g of phosphoric acid, 200 g of ammonium polyphosphate, 50 g of guanidine, 10 g of ethylene glycol, 30 g of acrylic polyol and 10 g of preservative.

The prepared flame retardant solution was applied to a larchy sheet having a thickness of 10 mm and a width of 100 mm at a weight of 150 g / m 2.

Then, the fire-resistant wood was prepared by drying the wood at a water content of about 12% in an artificial drier.

Comparative Example  One

The performance of the flame retardant wood was compared by applying the flame retardant (trade name: antawood) sold in the market in the same manner as in Example 1.

Comparative Example  2

A flame retardant wood was prepared by applying the flame retardant (commercially available from Flamesde Co., USA) in the same manner as in Example 1.

Experiment 1

The flame retardant performance of Example 1 and Comparative Examples 1 and 2 was evaluated according to the Ministry of Emission and Democratic Administration Notice No. 2009-31 and the flame retardant material standard.

Fig. 1 shows the flame retardancy evaluation result according to the flame retardant application amount. Referring to FIG. 1, the performance of Example 1 was the best, and Comparative Examples 1 and 2 showed that whitening occurred severely. In addition, it can be confirmed that the flame-retarding effect is excellent because the carbonization area is the smallest in Example 1.

Table 1 below shows that the flame retarding liquid of Example 1 is applied to wood and wallpaper and the flame retardancy is measured. Referring to Table 1, it was confirmed that the flame retardancy was acceptable when the coating amount was 100 g / m 2 or more.

 [Table 1]

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (13)

A phosphorus-based flame retardant, a guanidine-based compound, an acrylic polyol, and a phosphonic acid as a catalyst. delete The flame retardant of claim 1, wherein the flame retardant comprises 10 to 70 parts by weight of a phosphorus flame retardant, 5 to 30 parts by weight of phosphoric acid, 2 to 30 parts by weight of a guanidine flame retardant, and 2 to 25 parts by weight of an acrylic polyol, Water-soluble flame retardant which is characterized. 4. The water-based flame retardant liquid according to claim 3, wherein the flame retardant further comprises 1 to 5 parts by weight of ethylene glycol per 100 parts by weight of water. 4. The water-soluble flame retardant solution according to claim 3, wherein the flame retardant further comprises 1 to 5 parts by weight of preservative based on 100 parts by weight of water. The water-soluble flame retardant solution according to claim 1, wherein the flame-retardant solution comprises a guanidine phosphate compound, and the guanidine phosphate compound is formed by reacting part of the phosphorus-based flame retardant and the guanidine compound. The water-soluble flame retardant solution according to claim 1, wherein the phosphorus flame retardant is ammonium monophosphate, ammonium polyphosphate or phosphoric acid. The water-soluble flame retardant solution according to claim 1, wherein the guanidine-based compound is guanidine, guanidine sulfamate or guanidine phosphate. A flame retardant wood comprising the surface of the water-soluble flame retardant solution according to any one of claims 1 to 8. Providing a dry wood; And
Applying the wood with the water-soluble flame retardant solution of any one of claims 1 to 8; And
And drying the wood. ≪ RTI ID = 0.0 > 11. < / RTI > 11. The method of claim 10, wherein the dry wood has a water content of 12% or less. The method according to claim 10, wherein the amount of the flame retardant applied is 100 g / m 2 or more. The method according to claim 10, wherein the drying step is performed within one hour.

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