KR20190084613A - The reactive floor coating material composition and preparation method thereof - Google Patents

Abstract

The present invention relates to a floor coating material composition and a production method thereof and, more specifically, to a reactive floor coating material composition applied to form a paint film for flooring or road coating, and quickly cured at the room temperature, to a production method thereof, and to a paint film constructed using the same.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactive floor coating composition and a process for producing the same,

The present invention relates to floor coating compositions and processes for their preparation. More particularly, the present invention relates to a reactive floor coating composition capable of rapid curing at room temperature, which is applied to form a coating film for floor coating or road coating, a method for producing the same, and a coating film applied using the composition.

Generally, a coating film formed on the surface of a floor material such as concrete or asphalt is required to have surface strength and abrasion resistance according to long-term use. If the abrasion resistance is lowered, the deterioration of the flooring component such as the aggregate becomes worse with time and the slip prevention effect can be greatly reduced. Also, when the difference in expansion coefficient between the flooring material and the coating film occurs due to the difference in temperature between the winter season and the summer season, dust or noise is generated due to deterioration of physical properties such as cracking, .

On the other hand, a composition having various compositions for a coating film having excellent physical properties has been proposed, but it has not exhibited a satisfactory effect and has a problem that the workability is low, such as complicated construction or a long time, A research and development on a floor coating composition which can be applied to a floor coating composition is required.

Korean Patent No. 10-0799501 (2008.04.24.) Korean Patent No. 10-0832038 (May 19, 2008)

The present invention is applied to forming a coating film for a flooring material or a road coating material, and is excellent in workability at the time of construction, and can be rapidly cured at room temperature, and at the same time, it can reduce the physical properties of the coating film due to the difference in thermal expansion coefficient with the substrate, And to provide a reactive floor coating composition which is capable of preventing the occurrence of cracks.

The present invention also relates to a reactive floor coating composition capable of enhancing adhesion to a substrate to prevent cracking of the coating film, lifting and detaching of aggregates, and improving mechanical properties such as long-term durability, abrasion resistance and tensile strength, And a method thereof.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein,

A first liquid containing an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, an alcohol compound having an unsaturated group, and an alkyl (meth) acrylate having a hydroxy group; A second liquid containing an acrylic resin, an alkyl (meth) acrylate, an inorganic filler and a curing accelerator; And a hardener. ≪ Desc / Clms Page number 2 >

In the floor coating composition according to an embodiment of the present invention, the isocyanate-terminated polyurethane may be obtained by reacting the polyisocyanate in a molar ratio of 1 to 4 with respect to the polyol.

In the floor coating composition according to an embodiment of the present invention, the alcohol compound having an unsaturated group may have a KOH hydroxyl group content of 160 to 180 mg / g.

In the floor coating composition according to an embodiment of the present invention, the weight ratio (a / b) of the first liquid (a) and the second liquid (b) may be 0.1 to 1.0.

The first liquid comprises 20 to 80% by weight of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, 10 to 40% by weight of an alcohol compound having an unsaturated group, and a hydroxyalkyl (Meth) acrylate and 20 to 40% by weight of a (meth) acrylate.

The second liquid comprises 5 to 20% by weight of an acrylic resin, 30 to 60% by weight of an alkyl (meth) acrylate, 20 to 60% by weight of an inorganic filler and 0.2% by weight of a curing accelerator By weight to 2% by weight.

In the floor coating composition according to an embodiment of the present invention, the inorganic filler may be at least one selected from the group consisting of silica, alumina, calcium carbonate, talc, barium sulfate, clay, aluminum hydroxide and magnesium hydroxide .

In the floor coating composition according to an embodiment of the present invention, the alumina may have an average particle size of 10 nm to 100 nm.

In the floor coating composition according to an embodiment of the present invention, the alkyl (meth) acrylate having a hydroxy group may be selected from the group consisting of 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) Hydroxybutyl (meth) acrylate, 5-hydroxypentyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 7-hydroxyheptyl And the rate may be one or more selected from the group consisting of:

In the floor coating composition according to one embodiment of the present invention, the polyisocyanate is 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4-diphenylmethane diisocyanate, 2,4-diphenyl Methane isocyanate, 1,5-naphthalene diisocyanate, 4,6-xylene diisocyanate, para-phenylenediisocyanate, 3,3-tolylene-4,4-diisocyanate, 3,3- , 4-diisocyanate, 4,4-dicyclohexylmethane diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, bis (isocyanatomethyl) cyclohexane and tetramethylxylene diisocyanate May be one or more selected from the group consisting of

In a floor coating composition according to an embodiment of the present invention, the curing agent is selected from the group consisting of ketone peroxide, diacyl peroxide, hydroperoxide, dialkyl peroxide, peroxytart, alkylperester, cumene hydroperoxide, diisopropyl Benzene hydroperoxide, and dibenzoyl peroxide.

The floor coating composition according to one embodiment of the present invention can be used as a floor coating composition in the form of a plasticizer, an ultraviolet absorber, an antistatic agent, a thickener, a thixotropic agent, a leveling agent, a wax, a defoaming agent, a dispersant, an aggregate, a pigment, a lubricant, An antioxidant, an ultraviolet stabilizer, and a processing aid. The antioxidant may be at least one selected from the group consisting of an antioxidant, an antioxidant, a UV stabilizer, and a processing aid.

In another aspect of the present invention, a first liquid containing a polymer prepared by reacting a reaction product of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol and an alcohol compound having an unsaturated group with a hydroxyalkyl (meth) acrylate is produced And mixing the first liquid with a second liquid containing an acrylic resin, an alkyl (meth) acrylate, an inorganic filler and a curing accelerator, and then adding a curing agent and reacting the mixture. will be.

In the method for producing a floor coating agent according to an embodiment of the present invention, the isocyanate-terminated polyurethane may be prepared by reacting a polyisocyanate to polyol in a molar ratio of 1 to 4.

In the method of manufacturing a floor coating agent according to an embodiment of the present invention, the mixing weight ratio of the first liquid and the second liquid may be 0.1 to 1.0.

In the method for producing a floor coating agent according to an embodiment of the present invention, the first liquid comprises 20 to 80% by weight of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, 10 to 40% by weight of an alcohol compound having an unsaturated group, And 20 to 40% by weight of a hydroxyalkyl (meth) acrylate.

In the method for producing a floor coating agent according to an embodiment of the present invention, the second liquid may contain 5 to 20 wt% of acrylic resin, 30 to 60 wt% of alkyl (meth) acrylate, 20 to 60 wt% of inorganic filler, And 0.2 to 2% by weight of an accelerator.

The reactive floor coating composition according to the present invention significantly improves the adhesion of various substrates to the surface, and at the same time has elasticity, which can prevent the coating film from cracking and lifting due to changes in temperature during the winter season or summer season, It is possible to realize excellent wear resistance and long-term durability without deteriorating the mechanical strength such as tensile strength. Specifically, when the composition is coated on skin complexes, the present invention can shorten the construction time since the curing speed is fast and drying is possible. In addition, it is resistant to chemicals such as calcium chloride, which is used for snow removal in the winter, because of its excellent durability, weather resistance and chemical resistance, and can prevent lifting and cracking of the coating film of the floor and road surface coating layer. In addition, since the abrasion resistance is remarkably improved, it is possible to effectively prevent the abrasion from being caused by friction even when the coating film is exposed to the external force for a long period of time, thereby improving the durability of the coating film. , It is possible to easily form a coating film, and furthermore, it is possible to maintain excellent physical properties of the coating film even if the repair is performed only in the area required for repairing, which is advantageous in terms of construction and cost.

Hereinafter, the floor coating composition of the present invention and its production method will be described in detail. The invention can be better understood by the following examples. The following examples are for illustrative purposes only and are not intended to limit the scope of protection defined by the appended claims. The technical terms and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise defined.

Unless otherwise specified in the present invention, " (meth) acrylate " is used to refer to both acrylate and methacrylate.

The inventor of the present invention is capable of accelerating the curing at room temperature and improving the performance of the coating. Further, due to the difference in thermal expansion coefficient between the coating film and the substrate due to extreme temperature fluctuations during the winter season or the summer season, Mechanical strength and long-term durability, which can solve the problems of deterioration of physical properties of the coating film such as cracking of an isocyanate-terminated polyurethane, an isocyanate-terminated polyurethane and an alcohol compound having an unsaturated group and an alkyl (Meth) acrylate and a combination of the components in the composition to improve the tensile strength, the compressive strength, the impact strength and the weather resistance, and the heat resistance and the low temperature flexibility are improved, Can be prevented, and excellent It is possible to realize an abrasion resistance and a long-term durability, thereby completing the present invention.

Specifically, one embodiment of the present invention relates to a method for producing a polyurethane foam comprising a first liquid containing an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, an alcohol compound having an unsaturated group and an alkyl (meth) acrylate having a hydroxy group; A second liquid containing an acrylic resin, an alkyl (meth) acrylate, an inorganic filler and a curing accelerator; And a curing agent.

According to one embodiment of the present invention, the polymer contained in the first liquid is obtained by reacting a polyisocyanate and a polyol to react an polyurethane having an isocyanate group at the terminal thereof with an alcohol compound having an unsaturated group to introduce an unsaturated group into the isocyanate-terminated polyurethane (Meth) acrylate having a hydroxyl group at the same time, the physical and chemical bonding is enhanced in combination with other components in the composition to improve the adhesive strength and control the elastic modulus, thereby improving the physical properties of the coating film.

The polyisocyanate may be an aromatic, aliphatic or alicyclic group having at least two isocyanate groups, and is not particularly limited, but specific examples thereof include 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, Phenylmethane diisocyanate, 2,4-diphenylmethane isocyanate, 1,5-naphthalene diisocyanate, 4,6-xylene diisocyanate, para-phenylene diisocyanate, 3,3- 1,3-dimethyl-diphenylmethane-4,4-diisocyanate, 1,6-hexamethylene diisocyanate, 1,6-hexamethylene diisocyanate trimer, 1,6-hexamethylene diisocyanate burette, 1,6 -Hexamethylene diisocyanate allophanate, 4,4-dicyclohexylmethane diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, bis (isocyanatomethyl) cyclo Any one selected from acids and tetramethyl xylene diisocyanate group consisting of may be one or more.

The polyol is not particularly limited as long as it is capable of reacting with the polyisocyanate, and specific examples thereof include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, and neopentyl glycol A straight chain aliphatic diol such as ethylene glycol; A diol having a repeating unit of an alicyclic structure such as 1,4-cyclohexane dimethanol, hydrogenated bisphenol A and tricyclodecane dimethanol; Aromatic diols such as bisphenol A and xylenediols; Polyether glycols such as diethylene glycol, triethylene glycol, polyethylene glycol, polytrimethylene glycol, polytetraethylene glycol and polypropylene glycol; Polyester polyols such as polyethylene adipate, polytrimethylene adipate, polytetramethylene adipate, polyhexamethylene adipate, polyneopentylene adipate and polycaprolactam; And polycarbonate polyols; And the like. More specifically, at least one polyether polyol selected from polyethylene glycol, polypropylene glycol, polytrimethylene glycol and polytetraethylene glycol can be used, but is not limited thereto.

The polyol may have a number average molecular weight of 500 to 10,000, more specifically a number average molecular weight of 1,000 to 8,000, although the molecular weight of the polyol is not particularly limited. When the above range is satisfied, it is effective in securing flexibility and physical properties such as strength, water resistance, chemical resistance and weather resistance of the coating film, but this is only a non-limiting example and is not limited to the above numerical range.

At this time, the isocyanate-terminated polyurethane may contain 15 to 50% by weight, specifically 20 to 45% by weight, based on the total weight of the first liquid, of the polyol. The polyisocyanate may be 5 to 25% by weight, more preferably 10 to 20% by weight based on the total weight of the first liquid.

Further, the molar ratio of the polyisocyanate to the polyol may be 1 to 4, preferably 1.4 to 3.2. When the above range is satisfied, the density of the urethane bond in the polymer can be increased to increase the bonding force with other components in the composition, and at the same time, the elastic modulus is increased, which is effective in enhancing physical properties such as crack prevention of the coating film.

The content of the isocyanate-terminated polyurethane in the first liquid may be 20 to 70% by weight, specifically 25 to 65% by weight based on the total weight of the first liquid. When the above range is satisfied, it is more effective in realizing the desired properties of the present invention.

The alcohol compound having an unsaturated group is capable of introducing an unsaturated group into the terminal isocyanate polyurethane, and may specifically be an ether alcohol compound having an unsaturated group. At this time, the alcohol compound having an unsaturated group may have a KOH hydroxyl group content of 160 to 180 mg / g. If the range is satisfied, the flexibility and adhesion performance of the coating film can be ensured and the mechanical strength and long- Although effective in terms of height, this is a non-limiting example and is not limited to the above numerical range. An example of the alcohol compound having an unsaturated group may be a compound represented by the following formula (1).

[Chemical Formula 1]

More specifically, the ether alcohol compound having an unsaturated group may have a viscosity of 70 to 120 cps at 25 DEG C, and a commercial example thereof may include, but is not limited to, Carbowite LITE 2020. Hereinafter, the compound of formula (1) will be referred to as vinyl ether alcohol.

The alcohol compound having an unsaturated group may be contained in an amount of 10 to 40% by weight, specifically 15 to 35% by weight based on the total weight of the first liquid. When the above range is satisfied, it is more effective in improving physical properties such as mechanical strength, water resistance, chemical resistance and weather resistance as well as increasing the curing rate.

According to an embodiment of the present invention, there is included a combination of an arrangement in which an alcohol compound having an unsaturated group and an alkyl (meth) acrylate having a hydroxy group are simultaneously reacted from the isocyanate-terminated polyurethane. This is effective in improving the water resistance, acid resistance and alkali resistance of the coating film, improving the physical properties such as adhesion strength and appearance, and ensuring the pot life, and in terms of the workability in shortening the drying time.

The alkyl (meth) acrylate having a hydroxy group may be selected from the group consisting of 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (Meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 7-hydroxyheptyl (meth) acrylate and 8-hydroxyoctyl But is not limited thereto. Specifically, it may be at least one selected from 4-hydroxybutyl (meth) acrylate and 2-hydroxyethyl (meth) acrylate.

The alkyl (meth) acrylate having a hydroxy group may be contained in an amount of 20 to 40% by weight, specifically 20 to 35% by weight based on the total weight of the first liquid. When the above range is satisfied, the coating film properties such as water resistance and viscosity control of the composition at the time of construction can be easily controlled, which is more effective in terms of workability improvement.

According to one aspect of the present invention, the second liquid comprises an acrylic resin, an alkyl (meth) acrylate, an inorganic filler, and a curing accelerator.

The acrylic resin is used in combination with the polymer in the first liquid to improve the physical properties of the coating film by improving the adhesive force through strong physical and chemical bonding with various skin complex substrates and controlling the elastic modulus. (Meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl , A polymer obtained by polymerizing at least one monomer selected from the group consisting of glycidyl (meth) acrylate, (meth) acrylic acid, vinyl acetate, styrene, (meth) acrylonitrile and alpha methylstyrene. At this time, the types of the monomers are not limited to those listed above. In addition, polymerization methods using these monomers include suspension polymerization, bulk polymerization, solution polymerization, and the like, but are not limited thereto.

The acrylic resin may have a weight average molecular weight of 5,000 to 250,000 g / mol, more specifically 10,000 to 200,000 g / mol, although the molecular weight of the acrylic resin is not particularly limited. When the above range is satisfied, it is effective in enhancing the adhesion performance as well as enhancing the physical properties of the coating film in combination with other components in the composition, and also facilitating viscosity control so as to improve work performance at the time of construction, And is not limited to the above numerical range.

The weight average molecular weight was measured by dissolving the sample in tetrahydrofuran (THF) and using gel permeation chromatography (GPC) (analytical column: Styragel HR manufactured by WATERS Co., standard material: polystyrene (PS)).

The acrylic resin may have a glass transition temperature of 40 to 100 ° C, specifically 50 to 80 ° C.

The content of the acrylic resin is not particularly limited, but may be specifically 5 to 20% by weight, more specifically 10 to 15% by weight based on the total weight of the second liquid.

The alkyl (meth) acrylate may be at least one selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, (Meth) acrylate, hexyl (meth) acrylate, glycidyl (meth) acrylate, (meth) acrylic acid, vinyl acetate, styrene, (meth) acrylonitrile and alpha methylstyrene But is not limited thereto. It may be contained in the composition as a monomer in an amount of 30 to 60% by weight, specifically 35 to 50% by weight based on the total weight of the second liquid. When the above range is satisfied, a coating film is easily formed by combination with the acrylic resin, But this is a non-limiting example and is not limited to the above numerical range.

According to one aspect of the present invention, the second liquid comprises an inorganic filler together with the acrylic resin and the alkyl (meth) acrylate. The inorganic filler improves the mechanical properties of the coating film. In particular, the inorganic filler has good dispersibility due to the combination of the acrylic resin and the alkyl (meth) acrylate, and has properties that uniform physical properties can be realized at the time of coating film formation. Examples of the inorganic filler include at least one selected from the group consisting of silica, alumina, calcium carbonate, talc, barium sulfate, clay, aluminum hydroxide, and magnesium hydroxide. The inorganic filler may include, but is not limited to, silica, alumina, and calcium carbonate in terms of realizing the desired physical properties of the present invention.

The alumina may have an average particle size of 10 nm to 100 nm, specifically 20 nm to 80 nm. The alumina is more effective in achieving the object of the present invention because it is contained in the second liquid in the form of a solution in order to increase dispersibility as particles in the nano size range.

According to one aspect of the present invention, the second liquid is characterized in that the inorganic filler includes a nano-alumina solution in which nano-alumina is dispersed on a solution. That is, the composition according to an embodiment of the present invention is characterized in that it comprises a nano-alumina solution which is a nano-inorganic substance, and may further include other inorganic filler components besides the use of the nano-alumina solution have. At this time, the nano-alumina is dispersed in a solution, other inorganic filler components are contained in a solid phase, and the uniformity of the coating film according to the combination of these components is more effective in improving the physical properties of the coating film. The alumina solution may be prepared by dispersing nano-alumina in an acrylic monomer. The content of the solid content in the solution is not particularly limited, but is preferably 5 to 50% by weight, more preferably 10 to 45% by weight. The present invention is more effective in improving the physical properties according to the present invention and enhancing the dispersibility. However, the present invention is not limited to the above-mentioned numerical range. At this time, the dispersion medium is not limited to acrylic monomers.

The content of the alumina solution is not particularly limited, but may be in the range of 10 to 30% by weight, specifically 15 to 25% by weight based on the total weight of the second liquid. If the range is satisfied, , Particularly in terms of improving wear resistance.

The silica is used to prevent sedimentation of inorganic substances in the composition and to control thixotropy, and the kind thereof is not particularly limited, but fumed silica can be used. It can also be used with bentonite, but is not limited thereto.

The content of the silica is not particularly limited, but preferably 0.1 to 5% by weight, specifically 0.5 to 3% by weight based on the total weight of the second liquid. If the range is satisfied, viscosity control is easy And storage stability can be ensured, and it is advantageous in terms of coating film formation due to good flowability.

The inorganic filler preferably includes a combination of the alumina solution and silica, and may further be mixed with at least one component selected from calcium carbonate, barium sulfate, clay, aluminum hydroxide, and magnesium hydroxide. At this time, the content of these components is not particularly limited, but may be specifically 5 to 25% by weight, more specifically 10 to 20% by weight based on the total weight of the second liquid in terms of the strength and appearance of the coating film.

According to one aspect of the present invention, the second liquid may include a curing accelerator. The curing accelerator is used in consideration of workability such as securing the degree of curing of the coating film and the pot life and shortening the drying time. Specifically, tri-n-butylamine, N-ethyl- (2-hydroxypropyl) p-toluidine, cobalt naphthalenate, cobalt octylate, cobalt acetylacetonate, di (2-hydroxyethyl) Dibutyl tin dilaurate, dioctyl tin dilaurate, dibutyltin oxide, dibutyl tin oxide, tetra butyl titanate, naphthyl tin dilaurate, The organic bismuth compound, triethylene diamine, triethylene amine, tetramethylenediamine, N, N-dimethyl ethanolamine, and dimethyl A group consisting of dimethyl imidazole But it is at least one selected from, but are not necessarily limited thereto.

The content of the curing accelerator is not particularly limited, but may be specifically 0.2 to 2% by weight, more specifically 0.5 to 1.0% by weight based on the total weight of the second liquid. When the above range is satisfied, it is effective in that the potting time and the drying time can be easily controlled and the workability can be improved at the time of coating film construction.

The second liquid may further include additional components in consideration of various characteristics other than the above-mentioned components. Examples of the additive component include a plasticizer, an ultraviolet absorber, an antistatic agent, a thickener, a leveling agent, a leveling agent, a wax, a defoaming agent, a dispersant, an aggregate, a pigment, a lubricant, a colorant, A stabilizer, and a processing aid.

At this time, the antifoaming agent is used to prevent pinholes or air pockets from being formed in the process of forming a coating film, and it may use at least one of vegetable oil, animal oil, and silicone oil. The content of the antifoaming agent is not particularly limited, but may be 0.1 to 1.5% by weight, specifically 0.2 to 1.2% by weight based on the total weight of the second liquid in terms of durability, appearance and mechanical strength of the coating film.

The wax is used for internal hardening of a uniform coating film. Examples of the wax include a paraffin wax, a silicone wax, a polyethylene wax, and a polyimide wax, but is not limited thereto. The content of the wax is not particularly limited, but may be 0.1 to 1.5% by weight, specifically 0.2 to 1.2% by weight based on the total weight of the second liquid in terms of curing degree and uniformity as well as physical properties of the coating film.

The pigment may be selected from inorganic or organic pigments in order to produce a hue of the coating film. The content of the pigment may be controlled within a range that does not deviate from the intended physical property range of the present invention. Specifically, Relative to 2 to 10 wt%, more specifically 3 to 8 wt%.

The aggregate is used for improving slip resistance and abrasion resistance, and may be any one or more selected from artificial silica sand, gold sand, silica sand and steel slag, but is not limited thereto. At this time, the size of the aggregate is not particularly limited, but it may be 0.1 to 3.0 mm, specifically 0.2 to 2.5 mm. The amount of the aggregate may be 1 to 10% by weight, specifically 2 to 8% by weight based on the total weight of the second liquid. When the range is satisfied, the abrasion resistance can be improved and the adhesion performance between the composition and the skin complex can be improved The aggregate component can be effectively prevented from being separated from the aggregate, but the present invention is not limited thereto.

According to one embodiment of the present invention, the composition may be such that the weight ratio (a / b) of the first liquid (a) and the second liquid (b) is 0.1 to 1.0, specifically 0.2 to 0.8. When the above range is satisfied, it is more effective in achieving the desired properties of the present invention.

According to one aspect of the present invention, the composition comprises a curing agent for curing the composition simultaneously with the first liquid and the second liquid component combination. The curing agent may be selected from the group consisting of ketone peroxide, diacyl peroxide, hydroperoxide, dialkyl peroxide, peroxytart, alkyl perester, cumene hydroperoxide, diisopropylbenzene hydroperoxide and dibenzoyl peroxide But it is not necessarily limited thereto.

The content of the curing agent may be 3 to 30 parts by weight, specifically 7 to 25 parts by weight based on 100 parts by weight of the first liquid. When the above range is satisfied, it is possible to control the curing speed, to secure the pot life without lowering the physical properties of the coating film, to shorten the drying time, and to improve the work performance at the time of construction.

According to one embodiment of the present invention, the composition can increase the adhesion and abrasion resistance of various kinds of skin complexes, and is excellent in mechanical strength such as tensile strength, water resistance, acid resistance and alkali resistance, It is possible to easily carry out work by using a spray, a roller, a brush or the like in the coating process to be formed.

Another aspect of the present invention is a process for producing a first liquid containing a polymer prepared by reacting a reaction product of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol and an alcohol compound having an unsaturated group with a hydroxyalkyl (meth) And mixing the first liquid with a second liquid containing an acrylic resin, an alkyl (meth) acrylate, an inorganic filler and a curing accelerator, and then adding a curing agent and reacting the mixture. .

The step of producing the first liquid may be a process for producing a polyurethane having an unsaturated ether terminal, which comprises reacting a reaction product of a polyurethane having an isocyanate group at an end with an alcohol compound having an unsaturated group, a hydroxyalkyl (meth) acrylate ≪ / RTI > to produce a polymer. This can improve the heat resistance and low-temperature flexibility by containing acryl, long-chain unsaturated group and urethane group in the polymer resin framework, and it is possible to maintain a strong long-term adhesive force with the substrate and to maintain a strong adhesive force with the aggregate for a long time, And a polymer capable of enhancing the physical properties of the coating film to prevent cracking and dislocation of the substrate. In this case, the alcohol compound having an unsaturated group may have a reactive hydroxyl value of 160 to 180 (mg / g, KOH), which can introduce an unsaturated group such as a vinyl group at the terminal of the polyurethane, The desired properties of the present invention can be achieved through the reaction with an alkyl (meth) acrylate.

The first liquid may comprise 20 to 80 wt% of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, 10 to 40 wt% of an alcohol compound having an unsaturated group, and 20 to 40 wt% of a hydroxyalkyl (meth) acrylate have. At this time, it is more effective to achieve the object of the present invention by allowing the isocyanate-terminated polyurethane to react in a molar ratio of polyisocyanate to polyol within the range of 1 to 4.

The first liquid is introduced into a second liquid containing 5 to 20% by weight of an acrylic resin, 30 to 60% by weight of an alkyl (meth) acrylate, 20 to 60% by weight of an inorganic filler and 0.2 to 2% by weight of a curing accelerator, And mixed with the first liquid. In this case, the mixing weight ratio of the first liquid and the second liquid may be 0.1 to 1.0. Thereafter, a curing agent is added to the mixture of the first solution and the second solution to cure the coating solution to form a coating film on the skin complex. The components in the composition including the curing agent are as described above.

The following examples illustrate the floor coating composition according to the present invention, but the present invention is not limited to the following examples.

(evaluation)

(1) Tensile strength and elongation: Measured at KS M3006 standard, specimen dumbbell No. 1, at 7 days x 10 ° C

(2) Concrete adherence strength and asbestos adhesion strength: Measure according to KS F 2476, ◯ when adhesion strength is 1.5 MPa or more, △ if 1.0 MPa or more and less than 1.5 MPa, × if less than 1.0 MPa

(3) Ascontaining film state: After one year, look at the appearance of the coated film adhered to the ascon. If there is no area where the film is peeled off or cracked, it indicates that there is one or two defective areas in the entire film, If it is bad, it is marked with ×.

(4) Internal wear rate: Measured according to KS F 2813

(5) Pot life: Measured according to AASHITO T 237

(6) Drying time: Measured according to KS M 5000

(7) Acid resistance and alkali resistance: Each of the specimens having a thickness of 3 mm formed on the slate plate was dipped in 50 wt% sulfuric acid solution and 10 wt% caustic soda solution, respectively. ○, when 1 or 2 defective parts are found in the whole coating film △, otherwise, if it is defective in general, marked with ×

(8) Self leveling: When the composition is applied to the bottom surface, then saw marks are scratched when scratched with saw blade rake. ×, otherwise marked as ○.

(9) Roller workability: When the roller is painted, if the roller mark is left or there is an apparent abnormality, it is written as ×, otherwise it is marked as ○.

(Example 1)

16.4% by weight of methylene diisocyanate and 0.1% by weight of stannous octoate were added to 16.7% by weight of polypropylene glycol having a number average molecular weight (Mn) of 1,000, and the mixture was heated to 80 DEG C and reacted at 400 rpm for 90 minutes with stirring. 33.4% by weight of vinyl ether alcohol (Lite 2020, Cardolite) was added and reacted for 60 minutes while stirring at 400 rpm. Then, 33.3% by weight of 4-hydroxybutyl acrylate was added and reacted for 60 minutes to prepare a first liquid Respectively. A mixture of 23.9% by weight of methyl methacrylate, 11.9% by weight of butyl acrylate, and 29.9% by weight of an alumina solution (NANOBYK-3601, 40 nm, 30% sol n in TPGDA (Tripropylene Glycol Diacrylate) After raising the temperature to 75 캜 and stirring at 400 rpm, 9.0 wt% of polymethyl methacrylate (weight average molecular weight 10,000 g / mol) was added and dissolved for 90 minutes to obtain an acrylic resin solution. 0.3 wt% of N, N-dimethylaniline, 0.3 wt% of paraffin wax (weight average molecular weight of 400 g / mol), 0.3 wt% of defoamer (FOAMEX 840, TEGO) and dispersant (BYK-330, BYK) were mixed. Next, the mixed solution was cooled to room temperature, and 3.6 wt% of pigment (DJR-1300, Yukseong Chemical Co.), 14.9 wt% of heavy carbon (Omyacarb® 5-HB, OMYAKOREA) and 0.6 wt% of silica were added, 800 rpm) for 2 hours and dispersed sufficiently. Then, 4.8% by weight of aggregate was added and mixed for 30 minutes to prepare a second liquid.

Then, 25 parts by weight of benzoyl peroxide (BPO) was added as a curing agent based on 100 parts by weight of the first liquid, and the mixture was stirred for 3 minutes using a stirrer (stirring speed: 800 rpm) After mixing, the coatings were evaluated by applying roller on asphalt.

(Example 2)

As shown in the following Table 1, polypropylene glycol having a number average molecular weight of 3,000 was used instead of polypropylene glycol having a number average molecular weight of 1,000, isoprene diisocyanate was used instead of methylene diisocyanate, and 4-hydroxybutyl acrylate The procedure of Example 1 was repeated except that 2-hydroxyethyl methacrylate was used in place of the 2-hydroxyethyl methacrylate and the component content was changed.

(Example 3)

As shown in the following Table 1, instead of polypropylene glycol having a number average molecular weight of 3,000, polypropylene glycol having a number average molecular weight of 2,000 was used, and 2-hydroxyethyl acrylate was used instead of 2-hydroxyethyl methacrylate And the content of the components was changed. The results are shown in Table 1. < tb > < TABLE >

(Example 4)

As described in the following Table 1, polypropylene glycol having a number average molecular weight of 2,000 was used instead of polypropylene glycol having a number average molecular weight of 1,000, and the same procedure as in Example 1 was carried out except that the component content was changed .

(Example 5)

The procedure of Example 2 was repeated, except that the component content was changed as described in Table 1 below.

(Comparative Example 1)

The procedure of Example 2 was repeated except that the vinyl ether alcohol (Lite 2020, Cardolite) was not added in the preparation of the first liquid as described in Table 1 below.

(Comparative Example 2)

As described in the following Table 1, the same procedure as in Example 2 was carried out except that 4-hydroxybutyl acrylate was not added in the preparation of the first liquid.

Category (% by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Polypropylene glycol
(Mn = 1000) 16.7 - - - - - - Polypropylene glycol
(Mn = 2000) - - 38.2 26.6 - - - Polypropylene glycol
(Mn = 3000) - 48.1 - - 39.3 56.6 56.6 Methylene diisocyanate 16.4 - - 17 - - - Isoprene diisocyanate - 10.2 12.1 - 10.8 16.5 16.5 Vinyl ether alcohol
(Lite2020) 33.4 20.8 24.8 28.4 25.0 - 26.8 4-hydroxybutyl acrylate 33.4 - - 27.8 - - - 2-hydroxyethyl methacrylate - 20.8 - - 24.8 26.8 - 2-hydroxyethyl acrylate - - 24.8 - - - - Sternus octoate 0.1 0.1 0.1 0.2 0.1 0.1 0.1 The first sum 100 100 100 100 100 100 100 Methyl methacrylate 23.9 24.7 27.3 34.8 20.1 24.7 24.7 Butyl acrylate 11.9 12.3 13.6 17.4 10.0 12.3 12.3 Polymethylmethacrylate 9 12.3 10.2 4.4 27.7 12.3 12.3 Alumina solution 29.9 24.7 20.5 8.7 20.1 24.7 24.7 N, N-dimethylaniline 0.6 0.6 0.7 0.9 0.5 0.6 0.6 Paraffin wax 0.3 0.3 0.4 0.4 0.3 0.3 0.3 Defoamer 0.3 0.3 0.4 0.4 0.3 0.3 0.3 Dispersant 0.2 0.2 0.2 0.3 0.2 0.2 0.2 Coal mine 14.9 15.5 17.1 21.8 12.6 15.5 15.5 Silica 0.6 0.6 0.7 0.9 0.5 0.6 0.6 Pigment 3.6 3.7 4.1 5.2 3.0 3.7 3.7 aggregate 4.8 4.8 4.8 4.8 4.8 4.8 4.8 Second sum 100 100 100 100 100 100 100 First solution: second solution weight ratio 1: 9 1: 2.33 1: 1.05 1: 9 1: 2.33 1: 2.33 1: 2.33 Benzoyl peroxide
(BPO) (parts by weight) 25 16 7 25 16 16 16

Note: The weight part of benzoyl peroxide (BPO) is the weight per 100 parts by weight of the first liquid.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Tensile Strength (Mpa) 28 26 27 18 15 17 12 Elongation (%) 5 15 18 0.5 1.5 2.8 2.1 Ascon coating properties
(Dropout, crack) ○ ○ ○ △ △ × × My abrasion rate (Taber) 85 105 130 220 250 285 305 Slip Resistance (BPN) 60 55 55 40 35 35 25 Pot life (min, 25 ℃) 20 20 20 15 10 10 8 Drying time (min, 25 ℃) 40 45 45 100 120 130 150 Concrete bond strength ○ ○ ○ ○ ○ ○ △ Ascone attachment strength ○ ○ ○ △ ○ × × Acid resistance ○ ○ ○ △ △ × × My alkalinity ○ ○ ○ ○ ○ △ △ Self-leveling ○ ○ ○ ○ ○ × × Roller workability ○ ○ ○ ○ ○ × ×

As can be seen from Table 2, the examples according to the present invention are excellent in adhesion strength to skin complexes as well as abrasion resistance and anti-slip performance, and have significantly improved tensile strength and elongation with respect to coating film properties, And showed alkali resistance. At the same time, the drying time can be shortened while ensuring the pot life, and the work performance can be improved during the construction, which can be confirmed by self-leveling and roller workability. On the other hand, the comparative examples showed that the adhesion strength to the ascon was not good, the mechanical strength of the coating film and the slip resistance characteristics were deteriorated and the workability at the time of construction was remarkably deteriorated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible in light of the above teachings.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

Claims (17)

A first liquid containing an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, an alcohol compound having an unsaturated group, and an alkyl (meth) acrylate having a hydroxy group;
A second liquid containing an acrylic resin, an alkyl (meth) acrylate, an inorganic filler and a curing accelerator; And
Curing agent;
≪ / RTI > The method according to claim 1,
Wherein the isocyanate-terminated polyurethane is reacted in a molar ratio of the polyisocyanate to the polyol within a range of 1 to 4. The method according to claim 1,
Wherein the alcohol compound having an unsaturated group has a KOH hydroxyl group content of 160 to 180 mg / g. The method according to claim 1,
Wherein the floor coating composition is a reactive floor coating composition wherein the weight ratio (a / b) of the first liquid (a) and the second liquid (b) is 0.1 to 1.0. The method according to claim 1,
The first liquid comprises 20 to 80% by weight of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, 10 to 40% by weight of an alcohol compound having an unsaturated group and 20 to 40% by weight of a hydroxyalkyl (meth) ≪ / RTI > The method according to claim 1,
Wherein the second liquid comprises from 5 to 20% by weight of an acrylic resin, from 30 to 60% by weight of an alkyl (meth) acrylate, from 20 to 60% by weight of an inorganic filler and from 0.2 to 2% by weight of a curing accelerator. The method according to claim 1,
Wherein the inorganic filler comprises at least one selected from the group consisting of silica, alumina, calcium carbonate, talc, barium sulfate, clay, aluminum hydroxide, and magnesium hydroxide. 8. The method of claim 7,
Wherein the alumina has an average particle size of from 10 nm to 100 nm. The method according to claim 1,
The alkyl (meth) acrylate having a hydroxy group may be selected from the group consisting of 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (Meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 7-hydroxyheptyl (meth) acrylate and 8-hydroxyoctyl Coating composition. The method according to claim 1,
The composition may further comprise at least one of a plasticizer, an ultraviolet absorber, an antistatic agent, a thickener, a thixotropic agent, a leveling agent, a wax, a defoaming agent, a dispersant, an aggregate, a pigment, a lubricant, a coloring agent, Wherein the composition further comprises at least one selected from the group consisting of anionic surfactants, antioxidants, and processing aids. The method according to claim 1,
The polyisocyanate is selected from the group consisting of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4-diphenylmethane diisocyanate, 2,4-diphenylmethane isocyanate, 1,5-naphthalene diisocyanate, Xylene diisocyanate, para-phenylenediisocyanate, 3,3-tolylene-4,4-diisocyanate, 3,3-dimethyl-diphenylmethane-4,4-diisocyanate, 4,4-dicyclohexylmethane At least one selected from the group consisting of diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, bis (isocyanatomethyl) cyclohexane and tetramethyl xylene diisocyanate. The method according to claim 1,
The curing agent is selected from the group consisting of ketone peroxide, diacyl peroxide, hydroperoxide, dialkyl peroxide, peroxytart, alkyl perester, cumene hydroperoxide, diisopropylbenzene hydroperoxide and dibenzoyl peroxide ≪ / RTI > Preparing a first liquid containing a polymer prepared by reacting a reactant of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol and an alcohol compound having an unsaturated group with a hydroxyalkyl (meth) acrylate; and
Mixing the first liquid with a second liquid containing an acrylic resin, an alkyl (meth) acrylate, an inorganic filler and a curing accelerator, adding a curing agent, and reacting
≪ / RTI > 14. The method of claim 13,
Wherein the isocyanate-terminated polyurethane is reacted in a molar ratio of the polyisocyanate to the polyol within a range of 1 to 4. 14. The method of claim 13,
Wherein the mixing weight ratio of the first solution to the second solution is 0.1 to 1.0. 14. The method of claim 13,
Wherein said first liquid comprises 20 to 80% by weight of an isocyanate-terminated polyurethane reacted with a polyisocyanate and a polyol, 10 to 40% by weight of an alcohol compound having an unsaturated group and 20 to 40% by weight of a hydroxyalkyl (meth) ≪ / RTI > 14. The method of claim 13,
Wherein said second liquid comprises from 5 to 20% by weight of an acrylic resin, from 30 to 60% by weight of an alkyl (meth) acrylate, from 20 to 60% by weight of an inorganic filler and from 0.2 to 2% by weight of a curing accelerator.