JP2000219712A - Acrylate composition, cured article thereof, and composition for floor coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an acrylate composition which is used for coating or impregnating by compounding a urethane (meth)acrylate containing structural units derived from a polyol having a specified mol.wt. with a monofunctional (meth) acrylate which, when cured, has a specified glass transition temperature. SOLUTION: A urethane (meth)acrylate (A) having structural units derived from a polyol having a mol.wt. of 800-8,000 is compounded with a monofunctional (meth)acrylate (B) which, when cured, exhibits a glass transition temperature (Tg) of 90 deg.C or higher. The polyol is preferably a polycaprolactone polyol. Examples of ingredient B are (meth)acryloylmorpholine, isobornyl (meth) acrylate, dicyclopentanyl (meth)acrylate, and dicyclopentenyl (meth)acrylate. Usually, ingredient A accounts for 15-85 wt.% of the sum of ingredients A and B. When the composition is cured by ultraviolet irradiation, a photopolymerization initiator is compounded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acrylate composition, a cured product thereof, and a composition for coating flooring, and more particularly to coating, impregnating, and coating plastics, wood, metal plates, and paper. Acrylic composition useful for various building materials, furniture, printing paper, can products, household electrical appliances, etc., cured by its active energy rays, especially to prevent cracking of trees even under severe cold and heating conditions Along with
The present invention relates to an excellent active energy ray-curable flooring coating composition which does not crack the coating film itself.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for high-performance and high-performance paints in woodwork coating. Active energy ray-curable resins are used in large quantities as such paints because they are fast-curing, have low energy costs, and can be made non-polluting by eliminating solvents. For example, in woodwork coating, an unsaturated polyester / styrene-based paint using an unsaturated polyester obtained by reacting a polyhydric alcohol component and a double bond-containing polybasic acid component has a glossy, solid feeling, and a beautiful finish. It is widely used because it can be cured by active energy rays and has good productivity.

However, in recent years, in the woodwork painting field,
The use of inexpensive imported lumber with weak materials is increasing.
In many cases, hot carpets and the like are directly laid on flooring materials in cold weather. Under severe temperature conditions such as laying a hot carpet directly on the flooring,
The problem is that cracks occur in the wood. However, with such an unsaturated polyester / styrene paint, it is difficult to obtain a coating film having excellent crack resistance under severe cold and heating conditions.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to paint, impregnate, and coat plastics, wood, metal plates, paper, and the like to produce various building materials, furniture, printing paper, can products, and the like.
Acrylate-based compositions useful for household electrical appliances and the like, and cured products by active energy rays, especially to prevent cracking of wood even under severe cold conditions and heating conditions by heating, as well as cracking of the coating film itself An object of the present invention is to provide a composition for wood coating which is excellent in crack resistance and adhesion so as not to cause cracks.

[0005]

The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have found that a specific urethane (meth) acrylate (A), a monofunctional (meth) acrylate (B), and a photopolymerization initiator. By using a composition containing (C) as a hardening component, it can be applied to plastics, wood, metal plates, paper, etc. by painting, impregnating, and coating.
Acrylic composition useful for various building materials, furniture, printing paper, can products, household electrical appliances, etc., cured by active energy rays, especially to prevent cracking of trees under severe cold or heated conditions In addition, the present inventors have found an active energy ray-curable composition which does not crack the coating film itself and has excellent crack resistance, and has arrived at the present invention.

That is, a first aspect of the present invention is that a molecular weight of 800 to 800 is used.
Acrylate composition comprising a urethane (meth) acrylate (A) containing 8,000 polyol as a structural unit and a monofunctional (meth) acrylate (B) having a glass transition temperature (Tg) of 90 ° C. or higher after curing. I will provide a. A second aspect of the present invention is the acrylate-based composition according to the first aspect, wherein the weight ratio of the urethane (meth) acrylate (A) to the monofunctional (meth) acrylate (B) is 85 to 15: 15 to 85. Offer things. A third aspect of the present invention is
The acrylate-based composition according to the first or second aspect of the present invention, wherein the polyol having a molecular weight of 800 to 8,000 is a polycaprolactone-based polyol. A fourth aspect of the present invention is characterized in that a polyol having a molecular weight of 800 to 8,000 contains two or more molecules of the polyol in one molecule of urethane (meth) acrylate. An acrylate-based composition according to any of the above is provided. A fifth aspect of the present invention is that the molecular weight is 800 to 8,000.
The acrylate composition according to any one of the first to fourth aspects of the present invention, wherein the polyol 0 is a combination of the polyol and a low molecular weight polyol having a molecular weight of 300 or less. A sixth aspect of the present invention is that the monofunctional (meth) acrylate (B) comprises (meth) acryloylmorpholine, isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate and dicyclopentenyl (meth)
An acrylate-based composition according to the first aspect of the present invention, which is at least one selected from the group of acrylates. According to a seventh aspect of the present invention, there is provided the acrylate composition according to any one of the first to sixth aspects, further comprising a (meth) acrylate monomer (D). According to an eighth aspect of the present invention, there is provided the acrylate composition according to any one of the first to seventh aspects of the present invention, further comprising a photopolymerization initiator (C). A ninth aspect of the present invention provides a cured product obtained by curing the acrylate-based composition according to any one of the first to eighth aspects of the present invention with an active energy ray. Tenth aspect of the present invention
Provides a floor coating composition comprising the acrylate composition according to any one of the first to eighth aspects of the present invention.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The acrylate composition of the present invention has a urethane (meth) acrylate (A) containing a polyol having a molecular weight of 800 to 8,000 and a glass transition temperature (Tg) after curing of 90 ° C. or higher. A certain monofunctional (meta)
It consists of acrylate (B). A methacrylate monomer (D) can be further added to the acrylate composition of the present invention. The photopolymerization initiator (C) can be further added to the acrylate composition of the present invention.
The urethane (meth) acrylate (A) is a high-molecular-weight polyol (a-1) or a high-molecular-weight polyol (a-
It is obtained by reacting a mixture of 1) and a low molecular weight polyol (a-2) with a polyisocyanate compound (b) and a hydroxyl group-containing (meth) acrylate (c).

Raw material polyol (a-1) for urethane (meth) acrylate (A) The polyol (a-1) has a molecular weight of 800-8,
000, preferably in the range of 1,000 to 6,000. The molecular weight of the polyol (a-1) is
If it is less than 800, the elongation of the resin becomes insufficient, which is not preferable. If it exceeds 8,000, urethane (meth)
When acrylated, the viscosity increases and handling becomes difficult. Such a high molecular weight polyol (a-
Examples of 1) include polycaprolactone-based polyol, aromatic polyether-based polyol, aliphatic polyether-based polyol, polyester-based polyol, and polycarbonate-based polyol. Polycaprolactone-based polyols include ethylene glycol,
Diethylene glycol, 1,4-butanediol, etc.
-It is obtained by reacting caprolactone. Among these, a polycaprolactone-based polyol is particularly preferred. These may be used alone or in combination of two or more. Further, the same kind may be used in two or more moles. In addition,
For the molecular weight, the hydroxyl value of the polyol is determined according to JIS K1557.
This is a value determined according to the following equation, measured according to 6.4. Molecular weight = 56.1 × N × 1,000 / hydroxyl value (where N is the number of functional groups of the initiator)

Raw material polyol (a-2) for urethane (meth) acrylate (A) As the polyol (a-1) as a raw material for urethane (meth) acrylate (A), only the high molecular weight polyols described above are used. Used or in the polyol (a-1),
Further, a low molecular weight polyol having a molecular weight of 300 or less (a-
A mixture obtained by mixing 2) can be used. The mixing ratio is
The low molecular weight polyol (a-2) is used in an amount of 1 to 20 mol, preferably 2 mol, per 1 mol of the high molecular weight polyol (a-1).
Mix up to 15 moles. Low molecular weight polyol (a-2)
However, if it is less than 1 mol, the elongation becomes insufficient when it is converted to urethane (meth) acrylate, and if it exceeds 20 mol, the viscosity becomes large when it is converted to urethane (meth) acrylate and handling becomes difficult. . Examples of the low molecular weight polyol (a-2) include ethylene glycol,
Diethylene glycol, triethylene glycol, 1,
Examples thereof include 2- or 1,3-propylene glycol, 1,3- or 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and neopentyl glycol. These may be used alone,
Alternatively, two or more kinds may be used in combination. Further, the same kind may be used in two or more moles.

Raw material polyisocyanate compound (b) for urethane (meth) acrylate (A) As the polyisocyanate compound (b), aromatic polyisocyanate compounds (b) may be used.
Aliphatic, cycloaliphatic or cycloaliphatic polyisocyanates or mixtures thereof are mentioned. Examples of the polyisocyanate compound (b) include tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hydrogenated diphenylmethane diisocyanate (H12MDI), polyphenylmethane polyisoyanate (crude MDI), and modified diphenylmethane diisocyanate (modified) MDI), xylylene diisocyanate (XDI), hydrogenated xylylene diisocyanate (H-
XDI), hexamethylene diisocyanate (HMD)
I), trimethylhexamethylene diisocyanate (T
MXDI), isophorone diisoyanate (IPDI)
And a trimer compound of these polyisocyanates. These may be used alone or in combination of two or more.

Raw materials for urethane (meth) acrylate (A) Hydroxyl-containing (meth) acrylate (c) Examples of the hydroxyl-containing (meth) acrylate (c) include 2-hydroxyethyl (meth) acrylate and 2-hydroxyethyl (meth) acrylate.
Hydroxypropyl (meth) acrylate, 4-butylhydroxy (meth) acrylate, caprolactone-modified 2-hydroxyethyl (meth) acrylate, tripropylene glycol (meth) acrylate, glycerol mono (meth) acrylate, glycerol di (meth) acrylate, triglycol Examples include methylolpropane di (meth) acrylate, glycerol methacrylate acrylate, and pentaerythritol tri (meth) acrylate. These may be used alone or in combination of two or more.

Production of urethane (meth) acrylate (A) The method for producing urethane (meth) acrylate (A) is not particularly limited as long as the above polyol, polyisocyanate and hydroxyl group-containing (meth) acrylate are reacted. Instead, it is manufactured by a known method. For example, a method in which a polyol, a polyisocyanate, and a hydroxyl group-containing (meth) acrylate are mixed and reacted together, and a polyol and a polyisocyanate are reacted to form a urethane isocyanate prepolymer containing one or more isocyanate groups per molecule. Then, a method of reacting the prepolymer with a hydroxyl group-containing (meth) acrylate,
After reacting a polyisocyanate and a hydroxyl group-containing (meth) acrylate to form a urethane isocyanate prepolymer containing one or more isocyanate groups per molecule, a method of reacting the prepolymer with a polyol may be used.

The reaction ratio of the polyol (a-1 and a-2), the polyisocyanate (b) and the hydroxyl group-containing (meth) acrylate (c) is based on 2 moles of the hydroxyl group-containing (meth) acrylate (c). Polyol (a-1 and a
-2) is 0.5 to 15 mol, preferably 1 to 10 mol,
The amount of the polyisocyanate (b) is 1.5 to 16 mol, preferably 2 to 11 mol. Polyol (a-1 and a
If -2) is less than the above range, the elongation becomes insufficient when converted to urethane (meth) acrylate, and if it exceeds the above range, the viscosity increases and handling becomes difficult. When the polyisocyanate (b) is less than the above range,
Urethane (meth) acrylate cannot be obtained, and if it exceeds the above range, storage stability deteriorates.

Monofunctional (meth) acrylate (B) The monofunctional (meth) acrylate (B) which is another component of the acrylic composition includes a glass transition temperature (T
g) is preferably 90 ° C. or higher, particularly 93 to 180 ° C. If the glass transition temperature (Tg) of the monofunctional (meth) acrylate (B) after curing is less than 90 ° C., the adhesion to a film or the like becomes insufficient. Examples of the monofunctional (meth) acrylate (B) having a glass transition temperature (Tg) of 90 ° C. or higher after curing include (meth) acryloylmorpholine, isobornyl (meth) acrylate,
Examples include dicyclopentanyl (meth) acrylate and dicyclopentenyl (meth) acrylate. One of these compounds may be used, or two or more of them may be used. These monofunctional (meth) acrylates (B) are manufactured, for example, by Daicel UCB Co., Ltd., and Kojinsha, and are easily available.

The composition ratio of the urethane (meth) acrylate (A) and the monofunctional (meth) acrylate (B) is such that the component (A) is 15 parts by weight in 100 parts by weight of the acrylic composition (A + B).
-85 parts by weight, preferably 20-80 parts by weight, more preferably 30-70 parts by weight. If the amount of the urethane (meth) acrylate (A) is less than 15 parts by weight, the adhesion to the film will be insufficient. Further, even when the amount exceeds 85 parts by weight, the adhesion to a film or the like becomes insufficient.

Photopolymerization Initiator (C) The floor coating composition of the present invention contains the above urethane (meth) acrylate (A) and monofunctional (meth) acrylate (B) as curable components. When the composition is cured by irradiation with an electron beam, a photopolymerization initiator is not used, but when the composition is cured by irradiation with ultraviolet rays, a photopolymerization initiator is blended. Examples of the photopolymerization initiator (C) used in the present invention include 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-
Phenylpropan-1-one, diethoxyacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1- (4-dodecylphenyl) -2-hydroxy-2-methylpropane −
1-one, 4- (2-hydroxyethoxy) -phenyl (2-hydroxy-2-propyl) ketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1, benzoin, benzoin Methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin phenyl ether, benzyldimethyl ketal, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4- Benzoyl-4'-methyldiphenyl sulfide, 3,3 '
-Dimethyl-4-methoxybenzophenone, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone,
Examples include 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, methylphenylglyoxylate, benzyl, camphorquinone and the like. One of these compounds may be used, or two or more of them may be used. The photopolymerization initiator (C) is
0.1 parts by weight based on 100 parts by weight of the mixture of (A) and (B).
1 to 10 parts by weight, preferably 1 to 7 parts by weight. If the amount of the photopolymerization initiator (C) is less than 0.1 part by weight, curing will be insufficient, and if it exceeds 10 parts by weight, curing will be too fast, which is not preferable.

(Meth) Acrylate Group-Containing Monomer (D) When compounding the acrylate composition of the present invention, a (meth) acrylate group-containing monomer (D) is further added to the urethane (meth) acrylate (A). Is preferred. Such a (meth) acrylate group-containing monomer (D) is not particularly limited and may be a known (meth) acrylate.
Acrylate group-containing monomers can be used. Examples of such a monomer (D) containing a (meth) acrylate group include phenoxyethyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) acrylate, and 1,6-hexanediol di (meth) acrylate. , Tripropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane ethoxy tri (meth) acrylate, pentaerythritol tri (tetra) (meth) acrylate, dipenta Erythritol hexa (meth) acrylate and the like. Further, polyester (meth) acrylates and epoxy (meth) acrylates can also be used. The amount of the (meth) acrylate group-containing monomer (D) is preferably 50 parts by weight or less based on 100 parts by weight of the acrylate-based composition (A + B). If it exceeds 50 parts by weight, the elongation becomes insufficient, which is not preferable.

The acrylate composition of the present invention may contain a filler such as calcium carbonate, talc, mica, clay, silica powder, colloidal silica, asbestos powder, aluminum hydroxide, zinc stearate, titanium white, etc. Alternatively, various pigments such as azo pigments can be used. Further, an organic solvent may be used for the purpose of adjusting the viscosity of the paint or the like. For example, toluene, xylene, butyl acetate, isobutyl acetate, ethyl acetate, methyl isobutyl ketone, methyl ethyl ketone and the like can be mentioned. These can be used alone or in combination of two or more.

The acrylate composition of the present invention may contain, if necessary, known leveling agents, ultraviolet absorbers, light stabilizers, defoamers, anti-settling agents, lubricants, abrasives, rust inhibitors, electrification agents. Additives such as inhibitors may be added.

Preparation of the Composition In order to obtain the acrylate composition of the present invention, the urethane (meth) acrylate (A), the monofunctional (meth) acrylate (B), and if necessary, a (meth) acrylate group-containing A predetermined amount of the monomer (D) is charged into a flask, a photopolymerization initiator (C) is added thereto, and the mixture is produced at room temperature to 50 ° C with stirring.

When the acrylate composition is used for a paint, an adhesive or the like, the thickness of the object is 2 μm to 200 m.
After application in m, the composition is cured by irradiation with ultraviolet rays or electron beams. A high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a carbon arc lamp, a xenon lamp, a metal halide lamp, or the like is used as a light source when performing ultraviolet irradiation. The irradiation time is
Although it depends on the type of light source, the distance between the light source and the application surface, and other conditions, the time is at most several tens of seconds, usually several seconds. After the ultraviolet irradiation, if necessary, heating can be performed to complete the curing. In the case of electron beam irradiation, 50 ~
An electron beam having an energy in the range of 1,000 KeV is preferably used, and the irradiation amount is preferably 2 to 5 Mrad.

The acrylate composition of the present invention can be used as it is as a floor coating composition. In the present invention, in order to use a specific composition, in addition to preventing cracking of the tree, without causing cracking of the coating film itself, under severe cold conditions, under heat conditions crack resistance, adhesion Excellent. The flooring coating composition of the present invention is particularly suitable as a primer for flooring coatings. In addition, you may use as an overcoating agent, and can also use a well-known overcoating agent. The floor material coating composition of the present invention is not limited to floor materials, and can be used for general wood for construction, civil engineering, decoration and the like.

[0023]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In addition, the numerical value in an Example and a comparative example means a weight part unless there is a notice.

(Synthesis Example 1) Urethane acrylate (A
Synthesis of 1) In a flask, isophorone diisocyanate (b) 444 was added.
g (2 mol), and after the internal temperature was raised to 70 ° C., 4,000 g of polycaprolactone-based diol (a-1) (PCL240, molecular weight: 4,000, manufactured by Daicel Chemical Industries, Ltd.)
(1.00 mol) was added and reacted. When the residual isocyanate group became 1.9%, 232 g (c) (2 mol) of 2-hydroxyethyl acrylate and 200 ppm of dibutyltin laurylate as a catalyst were added and reacted until the residual isocyanate group became 0.1% or less. Was carried out to obtain a urethane acrylate (A1).

(Synthesis Example 2) Urethane acrylate (A
Synthesis of 2) A urethane acrylate (A2) was synthesized in the same manner as in Synthesis Example 1 except that the charged components and charged amounts were as described below. Isophorone diisocyanate (b): 888 g (4 mol) Polycaprolactone diol (a-1): 4,000
g (1.00 mol) (PCL240, molecular weight 4,000
0, manufactured by Daicel Chemical Industries, Ltd.) Diethylene glycol (a-2): 212 g (2 mol) 2-hydroxyethyl acrylate (c): 232 g
(2 mol) dibutyltin laurylate: 200 ppm

(Synthesis Example 3) Urethane acrylate (A
Synthesis of 3) A urethane acrylate (A3) was synthesized in the same manner as in Synthesis Example 1 except that the charged components and charged amounts were as described below. Isophorone diisocyanate (b): 888 g (4 mol) Polycaprolactone diol (a-1): 3,000
g (3.00 mol) (PCL210B, molecular weight 1,00
0, manufactured by Daicel Chemical Industries, Ltd.) 2-hydroxyethyl acrylate (c): 232 g
(2 mol) dibutyltin laurylate: 200 ppm

(Synthesis Example 4) Urethane acrylate (A
Synthesis of 4) A urethane acrylate (A4) was synthesized in the same manner as in Synthesis Example 1 except that the charged components and charged amounts were as described below. Isophorone diisocyanate (b): 2,220 g (1
0 mol) Polycaprolactone diol (a-1): 3,000
g (3.00 mol) (PCL210B, molecular weight 1,00
0, manufactured by Daicel Chemical Industries, Ltd.) Diethylene glycol (a-2): 636 g (6 mol) 2-hydroxyethyl acrylate (c): 232 g
(2 mol) dibutyltin laurylate: 200 ppm

(Synthesis Example 5) Urethane acrylate (A
Synthesis of 5) A urethane acrylate (A5) was synthesized in the same manner as in Synthesis Example 1 except that the charged components and charged amounts were as described below. Isophorone diisocyanate (b): 444 g (2 mol) Polycaprolactone diol (a-1): 6,000
g (1.00 mol) (PCL260, molecular weight 6,000
0, manufactured by Daicel Chemical Industries, Ltd.) 2-hydroxyethyl acrylate (c): 232 g
(2 mol) dibutyltin laurylate: 200 ppm

(Synthesis Example 6) Synthesis of Urethane Acrylate (A6) for Comparative Example Particularly, a polycaprolactone diol having a low molecular weight was used. A urethane acrylate (A) was prepared in the same manner as in Synthesis Example 1 except that the charged components and the charged amounts were as described below.
6) was synthesized. Isophorone diisocyanate (b): 444 g (2 mol) Polycaprolactone diol (a-1): 500 g
(1.00 mol) (PCL205, molecular weight 500, manufactured by Daicel Chemical Industries, Ltd.) 2-hydroxyethyl acrylate (c): 232 g
(2 mol) dibutyltin laurylate: 200 ppm

Examples 1 to 6 and Comparative Examples 1 to 3 An undercoating agent (floor coating composition) was prepared at the compounding ratios shown in Table 1, and the undercoating agent was applied to a veneer veneer laminated plywood to a thickness of 10 μm. , And cured by ultraviolet light in the air under the following conditions, and then polished. On top of that, a commercially available overcoating agent [KRM7575 (manufactured by Daicel UCB)]
Was applied so as to have a thickness of 10 μm, and was irradiated and cured in air using a high-pressure mercury lamp under the following conditions. UV curing conditions High-pressure mercury lamp: 120 W / cm Irradiation distance: 10 cm Conveyor speed: 5 m / min Number of irradiations: 3 times

The measurement and evaluation in the examples and comparative examples were performed by the following methods. (1) Crack resistance (Cold heat test) Two cycles of cooling and heating were performed, each of which was left at 80 ° C. for 2 hours and left at −20 ° C. for 2 hours, and the presence or absence of cracks was visually evaluated. The criteria are as follows. Δ: No cracks Δ: Slight cracks X: Cracks (heat test) After standing at 80 ° C. for 8 hours, the presence or absence of cracks was visually evaluated. The criteria are as follows. 〇: No crack △: Some cracks X: Cracks

(2) Adhesion A cross cut was made on the surface of the coating film at intervals of 1 mm, and 1 mm ²
Was made, and cellophane tape was stuck thereon, peeled off rapidly, and the peeled cross-cuts were counted. Evaluation was performed immediately after curing, after a cold test, and after a heat test.
The evaluation criteria are as follows. 〇: No peeling Δ: Number of peeling 1 to 50 ×: Number of peeling 51 to 100

(3) Elongation A film having a thickness of 100 μm was prepared using the composition for coating flooring materials, and the elongation at break at 23 ° C. was measured with a tensile tester at a tensile speed of 100 mm / min and a distance of 20 mm between marked lines.
It measured on condition of. Table 1 shows the evaluation results of Examples 1 to 6 and Comparative Examples 1 to 3.

[0034]

[Table 1]

[0035]

The acrylate composition of the present invention is applied to plastics, wood, metal plate, paper, etc. by painting, impregnating, and coating to produce various building materials, furniture, printing paper, can products,
Provide useful acrylate composition for household electrical appliances, etc., floor coating composition, under severe cold conditions, not only to prevent cracking of wood under heating conditions such as heating,
Crack resistance so that the coating film itself does not crack,
Excellent adhesion.

Continued on the front page F term (reference) 4J027 AG03 AG04 AG09 AG13 AG14 AG23 AG24 AG27 AG32 AJ01 BA02 BA07 BA10 BA13 CB10 CC05 CC06 CD08 CD09 4J038 FA111 FA112 FA121 FA131 FA151 FA281 FA282 KA03 MA13 MA14 NA01 NA11 NA14 PA17 PB04 PC08 PC10

Claims (10)

[Claims] 1. A urethane (meth) acrylate (A) containing a polyol having a molecular weight of 800 to 8,000 as a constituent unit and a glass transition temperature (Tg) after curing of 90 ° C.
An acrylate composition comprising the above monofunctional (meth) acrylate (B). 2. The weight ratio of urethane (meth) acrylate (A) to monofunctional (meth) acrylate (B) is 85.
The acrylate-based composition according to claim 1, wherein the acrylate composition is from 15 to 15 to 85. 3. The acrylate composition according to claim 1, wherein the polyol having a molecular weight of 800 to 8,000 is a polycaprolactone-based polyol. 4. Urethane (meth) acrylate (A)
Wherein two or more polyols having a molecular weight of 800 to 8,000 are contained in one molecule.
4. The acrylate-based composition according to any one of 3. 5. Urethane (meth) acrylate (A)
The acrylate composition according to any one of claims 1 to 4, wherein a polyol having a molecular weight of 800 to 8,000 and a low molecular weight polyol having a molecular weight of 300 or less are used in combination. 6. A monofunctional (meth) acrylate (B) comprising:
2. The acrylate composition according to claim 1, wherein the acrylate composition is at least one selected from the group consisting of (meth) acryloylmorpholine, isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate and dicyclopentenyl (meth) acrylate. object. 7. The acrylate composition according to claim 1, further comprising a (meth) acrylate monomer (D). 8. The acrylate composition according to claim 1, further comprising a photopolymerization initiator (C). 9. An acrylate-based cured product obtained by curing the acrylate-based composition according to claim 1 with an active energy ray. 10. A floor coating composition comprising the acrylate composition according to claim 1.