KR20120048061A - Aqueous type hybrid (meth)acryl polyol resin composition, method of the same and aqueous paint including the same for furniture - Google Patents

Abstract

PURPOSE: An aqueous paint for furniture is provide to have excellent hardness, gloss 60°, attaching property and weatherability, and to improve indoor environment in case of using for furniture because of environment-friendly properties. CONSTITUTION: A manufacturing method of aqueous hybrid (meth)acrylpolyol resin composition comprises: a step of polymerizing 100.0 parts by weight of a monomer in water phase comprising 50-250 parts by weight, under the presence of 0.5-5 parts by weight of a surfactant, 0.1-2 parts by weight of a radical polymerization initiator; a step of manufacturing (meth)acrylpolyol resin by controlling the pH of product to 7.5-10.0 by controlling with a pH modifier; and a step of reacting the (meth)acrylpolyol resin and silicon alkoxide by adding 1-20 parts by weight of silicon alkoxide.

Description

Aqueous type hybrid (meth) acryl polyol resin composition, method of the same and aqueous paint including the same for furniture}

The present invention relates to an aqueous hybrid (meth) acrylic polyol resin composition, a method for preparing the same, and an aqueous paint for furniture comprising the same.

In recent years, interest in indoor environment is increasing in consideration of health, and in particular, as the use of furniture products containing various harmful chemicals increases, many studies on the reduction of various human harmful substances generated in furniture, etc. have. Generally, a two-component urethane paint is used as a coating material for finishing furniture, and the two-component urethane paint has a serious effect on the human body by using a volatile organic material including an organic solvent.

In order to solve the problems associated with the use of oil-based two-component urethane paint using a conventional organic solvent, there has been an attempt to use an aqueous paint containing no volatile organic compound as a furniture coating paint. However, water-based two-component urethane paint has a disadvantage in that it is hardly applied to furniture due to inferior physical properties such as coating hardness, gloss, water resistance, paintability, and durability compared to oil-based two-component urethane paint.

Accordingly, the present inventors completed the present invention after studying a paint for furniture exhibiting excellent properties such as coating hardness, gloss, water resistance, paintability, durability when applied to furniture.

An object of the present invention is to provide a water-based coating material for furniture, which is excellent in physical properties such as coating hardness, gloss, water resistance, paintability, durability when applied to furniture.

It is another object of the present invention to provide an aqueous hybrid (meth) acrylic polyol resin composition and a method for producing the same, which can be usefully used for the aqueous coating material for furniture.

In order to achieve the above object, the present invention provides 100 parts by weight of a monomer comprising a (meth) acrylic acid ester monomer and an aromatic vinyl monomer containing a hydroxyl group-containing (meth) acrylic acid ester monomer containing at least one hydroxyl group in a molecule thereof. In the presence of 0.5 to 5 parts by weight of surfactant and 0.1 to 2 parts by weight of a radical polymerization initiator, the polymer was polymerized in an aqueous phase containing 50 to 250 parts by weight of water, and then adjusted to a pH of 7.5 to 10.0 with a pH adjusting agent to obtain a (meth) acryl polyol resin. To prepare a method for producing an aqueous hybrid (meth) acrylic polyol resin composition characterized in that 1 to 20 parts by weight of silicone alkoxide is added thereto and silicon alkoxide reaction with the (meth) acrylic polyol resin.

It is preferable that the hydroxyl group-containing (meth) acrylic acid ester monomer is contained in an amount of 5 to 60% by weight in the (meth) acrylic acid ester monomer.

The monomer may be composed of 60 to 90 parts by weight of the (meth) acrylic acid ester monomer and 10 to 40 parts by weight of the aromatic vinyl monomer based on 100 parts by weight of the total.

0.1 to 3 parts by weight of a molecular weight regulator for controlling the molecular weight during the monomer polymerization may be added.

0.1 to 2 parts by weight of a buffer for pH stabilization may be added before and after polymerization of the monomer.

It is preferable that the said (meth) acryl polyol resin has a glass transition temperature of 0-30 degreeC.

In addition, in order to achieve the above object, the present invention provides an aqueous hybrid (meth) acrylic polyol resin composition, which is prepared by the above production method.

In addition, in order to achieve the above object, the present invention is a hardener comprising a main and an isocyanate compound containing 25 to 70 parts by weight of the aqueous hybrid (meth) acrylic polyol resin composition and 10 to 30 parts by weight of the pigment prepared by the production method It provides a water-based paint for furniture, characterized in that consisting of.

The aqueous aqueous paint according to the present invention comprises an aqueous hybrid aqueous (meth) acrylic polyol resin composition obtained by introducing a silicone alkoxide compound into the (meth) acrylic polyol resin, and thus has excellent hardness and excellent 60 ° glossiness. In addition, it has excellent adhesion and weather resistance, and in particular, unlike conventional oil-based two-component furniture paints, water-based two-component furniture paints have eco-friendly properties, which shows a useful effect of improving the indoor environment when applied to furniture.

The aqueous paint for furniture according to the present invention comprises a main agent and a curing agent comprising an aqueous hybrid (meth) acrylic polyol resin composition and a pigment.

The aqueous hybrid (meth) acrylic polyol resin composition interfaces a monomer including a (meth) acrylic acid ester monomer including an hydroxyl group-containing (meth) acrylic acid ester monomer containing at least one hydroxyl group in a molecule with an aromatic vinyl monomer. Polymerization in an aqueous phase in the presence of an activator and a radical polymerization initiator, and then adjusted to a pH of 7.5 to 10.0 with a pH adjuster to prepare a (meth) acrylic polyol resin, by adding a silicon alkoxide to the (meth) acrylic polyol resin and silicone It is prepared by reacting an alkoxide.

Hereinafter, first, an aqueous hybrid (meth) acrylic polyol resin composition and a method of preparing the same will be described in detail. As used herein, (meth) acryl includes acryl or / and methacrylic, for example, (meth) acrylic acid means acrylic acid and / or methacrylic acid.

The aqueous hybrid (meth) acrylic polyol resin composition according to the present invention is prepared by preparing a (meth) acrylic polyol resin in an aqueous phase and adding a silicon alkoxide thereto to react the (meth) acrylic polyol resin with a silicon alkoxide.

The (meth) acrylic polyol resin is 100 parts by weight of a monomer comprising a (meth) acrylic acid ester monomer and an aromatic vinyl monomer containing a hydroxyl group-containing (meth) acrylic acid ester monomer containing at least one hydroxyl group in a molecule thereof. It is prepared by polymerizing in an aqueous phase containing 50 to 250 parts by weight of water in the presence of 0.5 to 5 parts by weight and 0.1 to 2 parts by weight of the radical polymerization initiator, and then adjusting the pH to 7.5 to 10.0 with a pH adjuster.

The (meth) acrylic acid ester monomer may be used without limitation as long as it contains at least one (meth) acrylate group in its molecule.

According to the present invention, the (meth) acrylic acid ester monomer includes a hydroxyl group-containing (meth) acrylic acid ester monomer containing at least one hydroxyl group in a molecule. It is preferable that the said hydroxyl-containing (meth) acrylic acid ester monomer is contained 5 to 60 weight% in a (meth) acrylic acid ester monomer.

The hydroxyl group in the hydroxyl group-containing (meth) acrylic acid ester monomer reacts with the isocyanate group (NCO) group of the curing agent in the aqueous coating material for furniture according to the present invention to induce curing.

When the content of the hydroxyl group-containing (meth) acrylic acid ester monomer is included in less than 5% by weight in the (meth) acrylic acid ester monomer, when the final manufactured paint is applied to furniture, the desired hardness and gloss may be obtained. There is a problem that can not be, and if included in more than 60% by weight, there is a problem that the stability is lowered, the coating film is too hard to be broken easily, the hydroxyl group-containing (meth) acrylic ester monomer is 5 in the (meth) acrylic ester monomer It is preferably included to 60% by weight.

Examples of the hydroxyl group-containing (meth) acrylic acid ester monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, and 2-hydroxybutyl (Meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, etc. can be illustrated, The present invention is not limited thereto. The hydroxyl group-containing (meth) acrylic acid ester monomers may be used alone or in combination of two or more thereof.

Examples of the (meth) acrylic acid ester monomers other than the hydroxyl group-containing (meth) acrylic acid ester monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, and i-propyl (meth). Acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, allyl (meth) acrylate, benzyl (meth) Acrylate, cyclohexyl (meth) acrylate, phenyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, methoxydiethylene glycol (meth) acrylate, Methoxytriethylene glycol (meth) acrylate, methoxypropylene glycol (meth) acrylate, methoxydipropylene glycol (meth) acrylate, isobornyl (meth) acrylate, dicyclopentadienyl (meth) acrylate, Glee Cerolo mono (meth) acrylate etc. can be illustrated, These can be used individually or in combination of 2 or more types, respectively.

The (meth) acrylic acid ester monomer according to the present invention is preferably used so as to contain 60 to 90 parts by weight based on 100 parts by weight of the monomer used for preparing the (meth) acrylic polyol resin. If the addition amount of the (meth) acrylic acid ester monomer is less than 60 parts by weight based on the above standards, there is a problem that it is difficult to obtain the properties such as the desired durability when applying the final manufactured paints to furniture, and if it exceeds 90 parts by weight When applying paint to furniture, there is a problem that it is difficult to obtain desired physical properties such as coating hardness and gloss.

As the aromatic vinyl monomer, those generally known may be used without limitation. Specifically, the aromatic vinyl monomers may include styrene, alpha-methylstyrene, beta-methylstyrene, and 4-methylstyrene. These can be used individually or in combination of 2 or more, respectively.

The aromatic vinyl monomer is preferably used so that 10 to 40 parts by weight based on 100 parts by weight of the monomer used in the production of (meth) acrylic polyol resin. When the amount of the aromatic vinyl monomer added is less than 10 parts by weight based on the above criteria, there is a problem that it is difficult to obtain the desired coating film hardness, glossiness, and the like when applying the final manufactured paint to furniture, and when it exceeds 40 parts by weight, yellowing of the coating film There is a problem that this is worse durability.

The polymerization of the monomers takes place in the water phase in the presence of a surfactant and a radical polymerization initiator. At this time, the amount of water does not necessarily need to be limited, but the water is preferably added 50 to 250 parts by weight based on 100 parts by weight of the monomer. If the amount of the water is less than 50 parts by weight based on the above standard, there is a problem in that it is difficult to obtain a stable resin during the reaction of the prepared (meth) acrylic polyol resin, and when the content exceeds 250 parts by weight, the viscosity of the prepared (meth) acrylic polyol resin There is a problem that it is difficult to obtain the desired workability when applying the final manufactured paint to the furniture is lowered.

The surfactant is used to disperse the monomer and the prepared (meth) acrylic polyol resin in water, and those generally used in the art may be used without limitation. Specifically, the surfactant may be an anionic surfactant and a nonionic surfactant.

Examples of the anionic surfactants include sodium lauryl sulfate and sodium dodecylbenzenesulfonate. As said nonionic surfactant, an ethylene oxide propylene oxide block copolymer, polyoxy ethylene lauryl ether, polyoxy ethylene cetyl ether, polyoxy ethylene stearyl ether can be illustrated. The surfactants may be used alone or in combination of two or more thereof.

The surfactant is preferably added to include 0.5 to 5 parts by weight based on 100 parts by weight of the monomer. When the amount of the surfactant is less than 0.5 parts by weight based on the above standard, the dispersion properties are lowered, and the stability of the prepared (meth) acrylic polyol resin is lowered. When the amount of the surfactant is more than 5 parts by weight, the durability and There is a problem that it is difficult to obtain physical properties such as water resistance.

The radical polymerization initiator can be used without limitation so long as it can induce polymerization of the monomer used in the present invention.

Preferably, the radical polymerization initiator may use at least one selected from potassium persulfate, sodium persulfate and ammonium persulfate.

The radical polymerization initiator may be added in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of the monomer. If the added amount of the radical polymerization initiator is less than 0.1 parts by weight based on the above-mentioned standards, there is a problem that the polymerization reaction is not made smoothly, and if it exceeds 2 parts by weight, there is a problem in that the stability surface of the prepared (meth) acrylic polyol resin falls.

According to the present invention, a molecular weight regulator for controlling the molecular weight at the time of polymerization of the monomer may be added.

The molecular weight modifier may specifically exemplify dodecanethiol, ethyl mercaptoacetate, t-butyl mercaptan, benzenethiol, ethanethiol, butanethiol and carbon tetrafluoride, each of which may be used alone or in combination of two or more. have.

The molecular weight modifier may be added 0.1 to 3 parts by weight based on 100 parts by weight of the monomer. Glossiness and workability may be lowered when the amount of the molecular weight modifier is added in an amount of less than 0.1 part by weight based on the above standard, and when it exceeds 3 parts by weight, it is difficult to obtain physical properties required by the aqueous paint for furniture.

After the polymerization of the monomers is completed, a pH adjuster is added.

The pH adjusting agent is added to impart stability to the (meth) acrylic polyol resin prepared by adjusting the pH to 7.5 to 10.0 after the polymerization reaction is completed and to prevent unnecessary side reactions. The pH does not need to exceed 10.0, and if it is less than 7.5, there is a problem that the viscosity of the prepared (meth) acrylic polyol resin is lowered and the viscosity is increased.

The pH adjusting agent can be used without limitation as long as it can change the pH of the reaction solution after the polymerization reaction to alkaline. Preferably the pH adjusting agent may exemplify organic amines such as 2-dimethylaminoethanol, ammonia, triethylamine, diethanolamine, triethanolamine and the like.

A buffer for pH stabilization may be added before or after the polymerization of the monomers. Specifically, the buffer may include sodium carbonate, sodium bicarbonate, ammonium carbonate, monosodium dihydrogen phosphate, disodium hydrogen phosphate, and the like, which may be used alone or in combination of two or more.

The buffer is preferably added in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of the monomer in consideration of pH stability and stability of the prepared (meth) acryl polyol resin.

When the polymerization of the monomer is carried out for 1 to 6 hours at a temperature of 90 ° C. or lower, preferably 30 to 90 ° C., the (meth) acrylic polyol resin can be easily obtained.

The (meth) acrylic polyol resin prepared as described above preferably has a glass transition temperature of 0 to 30 ° C. If the glass transition temperature of the prepared (meth) acrylic polyol resin is less than 0 ° C., contaminants adhere to the dried coating film, and the coating film is contaminated. Thus, a soft coating film is formed, resulting in poor hardness of the coating film. On the other hand, when the glass transition temperature exceeds 30 ℃, there is a problem that the film forming ability is poor, it is difficult to form a uniform coating film.

When the preparation of the (meth) acrylic polyol resin is completed, the silicon alkoxide is added to the reaction solution to react with the (meth) acryl polyol resin and the silicon alkoxide. When the reaction is completed, an aqueous hybrid (meth) acrylic polyol resin composition according to the present invention can be obtained.

The silicon alkoxide compound is added to increase the mechanical and chemical properties.

As the silicone alkoxide compound, those generally known may be used without limitation, and those containing an alkoxy group such as ethoxy or methoxy are preferably used.

More specifically, the silicon alkoxide compound may include aminoethylaminopropyltrimethoxysilane, aminoethylaminopropyltrimethoxysilane, aminopropyltrimethoxysilane, chloropropyltrimethoxysilane, chloropropyltriethoxysilane, and glycidoxy. Propyl trimethoxysilane, methacryloxylpropyl trimethoxysilane, vinyl trimethoxysilane, etc. can be illustrated. Preferably glycidoxypropyltrimethoxysilane can be used.

It is preferable to add 1-20 weight part of said silicone alkoxide compounds with respect to 100 weight part of monomers used for manufacture of (meth) acryl polyol resin. If the addition amount of the silicon alkoxide compound is less than 5 parts by weight based on the above standards, when applying the final manufactured paints to furniture can not be expected to improve the physical properties such as hardness and weather resistance, if it exceeds 20 parts by weight of the viscosity of the aqueous hybrid (meth) There is a problem that the storage stability of the acrylic polyol resin composition is poor.

After the silicone alkoxide compound is added, the reaction is carried out at room temperature for 1 to 6 hours to obtain an aqueous hybrid (meth) acrylic polyol resin composition according to the present invention. The obtained aqueous hybrid (meth) acrylic polyol resin composition exhibits excellent properties such as coating film hardness, gloss, water resistance, paintability, and durability when applied for furniture.

Hereinafter will be described in detail with respect to the aqueous coating material for furniture comprising the aqueous hybrid (meth) acrylic polyol resin composition according to the present invention prepared by the above-described manufacturing method.

The aqueous aqueous paint for furniture according to the present invention is a two-component paint made of a water-based paint containing a main agent and a curing agent.

The subject matter comprises an aqueous hybrid (meth) acrylicpolyol resin composition and pigment prepared according to the invention described above.

Since the aqueous hybrid (meth) acrylic polyol resin composition is as described above, its detailed description is omitted here.

The aqueous hybrid (meth) acrylic polyol resin composition is preferably included from 25 to 70 parts by weight based on 100 parts by weight of the whole aqueous paint. If the content of the aqueous hybrid (meth) acrylic polyol resin composition is less than 25 parts by weight based on the above standards, the water resistance and durability of the coating film after curing becomes poor, and if it exceeds 70 parts by weight, the coating workability becomes poor due to an increase in viscosity. There is a problem.

The pigment may be used without limitation, those generally used in the paint field. For example, the pigment is titanium dioxide as a white pigment, carbon black or iron oxide pigment as a black pigment, phthalocyanine organic pigment as a blue and green pigment, chrome yellow and yellow iron oxide as a yellow and orange pigment. Iron oxide based inorganic pigments, azo based inorganic pigments, quinacridone based inorganic pigments and the like can be used as the system, titanium yellow, chrome orange, molybdate orange and red pigments. These can be used individually or in mixture of 2 or more, respectively.

The pigment is preferably contained 10 to 30 parts by weight based on 100 parts by weight of the whole aqueous paint. When the content of the pigment is included in the above range can not only express a good color but also exhibits excellent properties of the paint.

The subject can be further added to the water to adjust the viscosity of the paint as needed, which can be made optionally.

The curing agent is used to cure the subject, and in the present invention, an isocyanate compound which reacts with a polyol component in the aqueous hybrid (meth) acrylic polyol resin composition to form a urethane bond is used.

The isocyanate compound is preferably used a compound containing at least two isocyanate groups in the molecule. Such isocyanate compounds include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane, 1,8-diisocyanatooctane, 1,12-diisocyanatodecane, 1,5-diisocyanato-2 -Methylpentane, trimethyl-1,6-diisocyanatohexane, 1,3-bis (isocyanatomethyl) cyclohexane, trans-1,4-cyclohexene diisocyanate, 4,4-methylenebis (cyclohexyl isocyanate) ), Isophorone diisocyanate, toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, xylene-1,4-diisocyanate, tetramethylxylene-1,3-diisocyanate, 1-chloro Methyl-2,4-diisocyanate, 4,4-methylenebis (2,6-dimethylphenylisocyanate), 4,4-oxybis (phenylisocyanate), hexamethylene diisocyanate, and the like, and the like, each of which can be exemplified. It may be used alone or in combination of two or more.

The curing agent may be added in an amount of 5 to 50 parts by weight based on 100 parts by weight of the whole aqueous paint. If the curing agent is less than 5 parts by weight based on the above criteria, the hardness of the required coating film cannot be obtained. If the curing agent is more than 50 parts by weight, the cured coating film is easily broken even in a small impact.

The aqueous water-based paints according to the present invention may further include at least one additive selected from the group consisting of a wetting agent, an antifoaming agent, a flow control agent, a matting agent within the scope not departing from the object of the present invention in addition to the above components.

The aqueous water-based paints according to the present invention can be easily obtained by mixing the above components at room temperature. When the aqueous coating material for furniture according to the present invention is applied to a furniture and mixed with a main agent and a curing agent, the polyol contained in the aqueous hybrid (meth) acrylic polyol resin composition and the isocyanate group of the curing agent react to cure. In particular, the water-based paint for the furniture according to the present invention exhibits excellent properties such as hardness, gloss, weather resistance, adhesion, etc. as water-based, environmentally friendly and water-based hybrid (meth) acrylic polyol resin composition, unlike conventional oil-based paints.

Hereinafter, the present invention will be described in more detail with reference to the following examples, which are only presented to aid the understanding of the present invention and the present invention is not limited thereto.

≪ Example 1 >

A thermometer, a condenser, a stirrer, a dropping funnel, and a temperature raising device were attached to the four-necked glass flask. 363.1 g of deionized water, 1.4 g of sodium carbonate as a buffer, 3.5 g of sodium lauryl sulfonate as a surfactant, and 10.5 g of ethylene oxide propylene oxide block copolymer were added thereto, and the temperature was increased to 80 ° C.

Into another container, 87.6 g of methyl methacrylate, 104.7 g of butyl acrylate, 34.9 g of styrene, 34.9 g of isobutyl methacrylate, 79.9 g of 2-hydroxyethyl methacrylate, and 6.9 g of methacrylic acid were stirred. The monomer liquid mixture was prepared.

A portion (35 g) of the monomer mixture was added to the flask, and 2.8 g of potassium persulfate, a radical polymerization initiator, was dissolved in 140 g of deionized water. Then, the remaining monomer mixture was slowly added dropwise to the flask (for 3 hours) and further reacted for 3 hours. A solution obtained by diluting a solution of 6.1 g of 2-dimethylaminoethanol, which is a pH adjusting agent, in 21 g of deionized water was gradually added thereto to adjust the pH of the reaction solution to 8 to prepare a (meth) acrylic polyol resin. The nonvolatile content of the (meth) acryl polyol resin thus prepared was 40.1%, and the glass transition temperature was 25 ° C.

107.1 g of glycidoxy propyl trimethoxysilane was slowly added to the pH-controlled reaction solution, followed by reaction for 6 hours to obtain an aqueous hybrid (meth) acrylic polyol resin composition.

An aqueous coating material for furniture was prepared using the prepared aqueous hybrid (meth) acrylic polyol resin composition, the composition of which is shown in Table 1 below.

<Example 2>

A thermometer, a condenser, a stirrer, a dropping funnel, and a temperature raising device were attached to the four-necked glass flask. 369.7 g of deionized water, 1.4 g of sodium carbonate, 3.6 g of sodium lauryl sulfonate, and 10.7 g of ethylene oxide propylene oxide block copolymer were added thereto, and the temperature was increased to 80 ° C.

89.2 g of methyl methacrylate, 106.6 g of butyl acrylate, 35.6 g of styrene, 35.6 g of isobutyl methacrylate, 81.4 g of 2-hydroxyethyl methacrylate, and 7.1 g of methacrylic acid were added to a separate container, The monomer liquid mixture was prepared.

A portion (35 g) of the monomer mixture was added to the flask, and 2.8 g of potassium persulfate was added to 140 g of deionized water. Then, the remaining monomer mixture was slowly added dropwise to the flask (for 3 hours) and further reacted for 3 hours.

A solution of 6.1 g of 2-dimethylaminoethanol diluted in 21 g of deionized water was slowly added thereto to adjust the pH of the reaction solution to 8.3 to prepare a (meth) acrylic polyol resin. The nonvolatile content of the (meth) acrylic polyol resin thus prepared was 40.5%, and the glass transition temperature was 25 ° C.

91 g of glycidoxy propyl trimethoxysilane was slowly added to the pH-controlled reaction solution, followed by reaction for 6 hours to obtain an aqueous hybrid (meth) acrylic polyol resin composition.

An aqueous coating material for furniture was prepared using the prepared aqueous hybrid (meth) acrylic polyol resin composition, the composition of which is shown in Table 1 below.

<Example 3>

A thermometer, a condenser, a stirrer, a dropping funnel, and a temperature raising device were attached to the four-necked glass flask. 378.3 g of deionized water, 1.5 g of sodium carbonate, 3.6 g of sodium laurylsulfonate, and 10.9 g of ethylene oxide propylene oxide block copolymer were added thereto, and the temperature was raised to 80 ° C.

Into a separate container, 83.3 g of methyl methacrylate, 109.1 g of butyl acrylate, 36.4 g of styrene, 36.4 g of isobutyl methacrylate, 83.3 g of 2-hydroxyethyl methacrylate, and 7.3 g of methacrylic acid were stirred and The monomer liquid mixture was prepared.

A portion (35 g) of the monomer mixture was added to the flask, and 2.8 g of potassium persulfate was added to 140 g of deionized water. Then, the remaining monomer mixture was slowly added dropwise to the flask (for 3 hours) and further reacted for 3 hours. A solution of 6.4 g of 2-dimethylaminoethanol diluted in 22 g of deionized water was slowly added thereto to adjust the pH of the reaction solution to 8.2 to prepare a (meth) acrylic polyol resin. The nonvolatile content of the (meth) acryl polyol resin thus prepared was 39.9%, and the glass transition temperature was 25 ° C.

70 g of glycidoxy propyl trimethoxysilane was slowly added to the pH-controlled reaction solution, followed by reaction for 6 hours to obtain an aqueous hybrid (meth) acrylic polyol resin composition.

An aqueous coating material for furniture was prepared using the prepared aqueous hybrid (meth) acrylic polyol resin composition, the composition of which is shown in Table 1 below.

Comparative Example 1

A thermometer, a condenser, a stirrer, a dropping funnel, and a temperature raising device were attached to the four-necked glass flask. 406.6 g of deionized water, 1.5 g of sodium carbonate, 3.9 g of sodium lauryl sulfonate, and 11.7 g of ethylene oxide propylene oxide block copolymer were added thereto, and the temperature was raised to 80 ° C.

Into a separate container, 98.1 g of methyl methacrylate, 117.3 g of butyl acrylate, 39.1 g of styrene, 39.1 g of isobutyl methacrylate, 89.5 g of 2-hydroxyethyl methacrylate, and 7.8 g of methacrylic acid were stirred. The monomer liquid mixture was prepared.

A portion (35 g) of the monomer mixture was added to the flask, and 2.8 g of potassium persulfate was added to 140 g of deionized water. Then, the remaining monomer mixture was slowly added dropwise to the flask (for 3 hours) and further reacted for 3 hours. A solution of 6.8 g of 2-dimethylaminoethanol diluted in 23 g of deionized water was slowly added thereto to adjust the pH of the reaction solution to 8.5 to prepare a (meth) acrylic polyol resin. The nonvolatile content of the (meth) acrylic polyol resin thus prepared was 39.8%, and the glass transition temperature was 25 ° C.

Using the solution containing the (meth) acrylic polyol resin prepared for the aqueous coating material for furniture, the composition is shown in Table 1 below.

Furtherance Comparative example Example 2 4 5 6 subject Resin of Comparative Example 1 50 - - - Resin Composition of Example 1 - 50 - - Resin Composition of Example 2 - - 50 - Resin Composition of Example 3 - - - 50 Titanium dioxide 14 14 14 14 Humectant ¹⁾ 0.4 0.4 0.4 0.4 Dispersant ²⁾ 1.0 1.0 1.0 1.0 Antifoam ³⁾ 0.8 0.8 0.8 0.8 Fluidity regulator ⁴⁾ 1.0 1.0 1.0 1.0 water 12.8 12.8 12.8 12.8 Curing agent ^{5 )} 20 20 20 20 Sum 100 100 100 100

※ Note 1) Body wetting agent: AD-01 by Air product

         2) Dispersant: BYK-151 BYK Chemie

         3) Defoamer: TEGO-3062 from Evonik

         4) Fluidity regulator: Cognis's DSX-1514

         5) Hardener: Bayer's Bayhydur 3100

Experimental Example

The water-based two-component urethane coating composition for each furniture having the composition of Table 1 was evaluated for viscosity (DIN cup, 4 mm), pencil hardness, adhesion, weather resistance and gloss (60 °), workability, and the results are shown in Table 2 below. Shown in

1. Adhesiveness:

In accordance with ASTM D3359 Test Method-B, using a tool such as a sharp blade, a 2 mm gap is used so that the tip of the cutting tool reaches the material from the painted coating of the specimen. 25 square scales were made to cross each other, and the peeled state was observed when the film was sufficiently pressed with a tape of KS-S1528 standard and pulled in the 90 ° direction.

(Score: 0% peeled area, 5B ↔ 0B, peeled area 60% or more)

2. Pencil Hardness:

Using a pencil hardness tester (CT-PC1, Coretech.), The pencil for measuring pencil hardness was inserted at an angle of 45 ^° , and it was measured by applying a constant 500g load. A Mitsubishi pencil was used as a pencil, and a pencil showing strengths such as H-9H, F, HB, and B-6B was used.

3. Polished:

The formed coating film was measured 60 ° gloss using a gloss meter (Micro-gloss 60 °, BYK Gardner). The measured value was measured five times, and the average of three values except the highest and lowest value was calculated and recorded.

4. Weather resistance:

After 300 hours of testing with a QUV / SE model (Q-Lab Coporation), the gloss retention rate (%) was measured.

Test result Comparative example Example 2 4 5 6 Viscosity (DIN cup, 4 mm) 24 sec 24 sec 24 sec 26 seconds Pencil hardness HB H F F Adhesion 5B 5B 5B 5B Weatherability 72% 78% 75% 75% Glossy (60 °) 71 85 79 77 Workability Very good Very good Very good Very good

As shown in Table 2, the aqueous water-based paints of Examples 4 to 6 according to the present invention comprising an aqueous hybrid aqueous (meth) acrylic polyol resin composition have a hardness and 60 ° gloss as compared to the paint of Comparative Example 2 which does not include the same. Not only is this excellent but also weather resistance can be seen to exhibit excellent properties. In particular, unlike conventional oil-based two-component furniture paints, water-based two-component furniture paints have eco-friendly properties, and when applied to furniture has a useful effect to improve the indoor environment.

Claims (8)

0.5 to 5 parts by weight of a surfactant and a radical polymerization of 100 parts by weight of a (meth) acrylic acid ester monomer containing a hydroxyl group-containing (meth) acrylic acid ester monomer containing at least one hydroxyl group in the molecule and a monomer comprising an aromatic vinyl monomer (Meth) acrylic polyol resin was prepared by polymerizing in an aqueous phase containing 50 to 250 parts by weight of water in the presence of 0.1 to 2 parts by weight of an initiator, and then adjusting the pH to 7.5 to 10.0 with a pH adjusting agent, wherein the silicone alkoxide 1 to 20 was prepared. A method for producing an aqueous hybrid (meth) acrylic polyol resin composition, wherein a weight part is added to cause the (meth) acrylic polyol resin and silicon alkoxide reaction. The aqueous hybrid (meth) acrylic according to claim 1, wherein the (meth) acrylic acid ester monomer comprises 5 to 60% by weight of a hydroxyl group-containing (meth) acrylic acid ester monomer containing at least one hydroxyl group in a molecule thereof. Method for producing a polyol resin composition. The aqueous hybrid (meth) acrylic polyol according to claim 1, wherein the monomer comprises 60 to 90 parts by weight of the (meth) acrylic acid ester monomer and 10 to 40 parts by weight of the aromatic vinyl monomer, based on 100 parts by weight of the monomer. Method for producing a resin composition. The method for producing an aqueous hybrid (meth) acrylic polyol resin composition according to claim 1, wherein 0.1 to 3 parts by weight of a molecular weight regulator for controlling molecular weight during the monomer polymerization is added. The method for producing an aqueous hybrid (meth) acrylic polyol resin composition according to claim 1, wherein 0.1 to 2 parts by weight of a buffer for stabilizing pH is added before and after polymerization of the monomer. The method according to claim 1, wherein the (meth) acrylic polyol resin has a glass transition temperature of 0 to 30 ° C. An aqueous hybrid (meth) acrylic polyol resin composition, which is prepared by the method according to any one of claims 1 to 6. Claims 1 to 6 characterized in that consisting of a hardener comprising a main and an isocyanate compound containing 25 to 70 parts by weight of the aqueous hybrid (meth) acrylic polyol resin composition prepared by the method of any one of claims 1 to 6 and 10 to 30 parts by weight of the pigment Waterborne paints for furniture.