JP7240884B2 - Active energy ray-curable resin composition and cured product thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to an active energy ray-curable resin composition and a cured product thereof. More specifically, the present invention relates to an active energy ray-curable resin composition and a cured product thereof that can provide a cured product imparting desired physical properties while maintaining a low viscosity.

A curable resin composition that can be cured by heat or an active energy ray can exhibit various properties depending on its composition. Widely used.

The curable resin composition contains a polymerizable compound having a polymerizable group that can be cured by heat or active energy rays. As one of such polymerizable compounds, a crosslinkable compound, which is a polyfunctional compound having a plurality of (meth)acryloyl groups, alkylallyl ether groups, etc. as polymerizable groups or curable groups, is known. The crosslinkable compounds described above have various polymerization mechanisms depending on the types of functional groups they possess, and are used in various fields by taking advantage of these characteristics. For example, a crosslinkable compound having a (meth)acryloyl group as a polymerizable group is excellent in terms of curing speed, internal curability, durability of the chemical bond formed, economy, etc. It is used in various applications such as materials, adhesives, sealants, adhesives, paints, inks, resists, dental materials, lenses, and molding materials.

As the crosslinkable compound, for example, Patent Document 1 describes a compound having an α-allyloxymethylacryloyl group. The crosslinkable compound described in Patent Document 1 has both a radical polymerization mechanism that is inhibited by oxygen and an oxidative polymerization mechanism that requires oxygen, and can exhibit both curability to a high degree. It is excellent in curing speed, internal curability, surface curability and thin film curability.

Japanese Patent No. 5689628

By the way, the curable resin composition uses a combination of various polymerizable compounds in order to impart various properties to the cured product obtained by curing. However, when a high-viscosity component is used, the viscosity of the curable resin composition becomes high, and there is a problem that the handleability becomes difficult. Therefore, there is a problem that the design range of usable curable resin compositions is limited. In recent years, curable resin compositions and their cured products, which are applied in various technical fields, are required to have higher performance in a wider range. It is desirable to be able to freely design the curable resin composition.

The present invention has been made in view of the above-mentioned current situation, and a curable resin composition that can exhibit properties according to the application while maintaining a low viscosity even when it contains a high-viscosity component. intended to provide

The present inventors have made various studies on the curable resin composition, and found that a curable resin composition containing a crosslinkable compound having a specific structure, a high viscosity component, and a polymerization initiator maintains a low viscosity. However, the present inventors have found that cured products having properties such as thermal decomposition resistance, hardness, adhesion, and weather resistance can be obtained depending on the application, and have completed the present invention.

That is, the present invention provides a crosslinkable compound (A) represented by the following general formula (1), an oligomer having a viscosity of 1000 mPa·s or more at 25°C, or a viscosity of 400 mPa·s or more at 60°C. An active energy ray-curable resin composition comprising (B) and a polymerization initiator (C).

（式中、Ｚは、ｎ価の連結基を表す。ｎは、２以上の整数である。）

(Wherein, Z represents an n-valent linking group. n is an integer of 2 or more.)

In the active energy ray-curable resin composition, the oligomer (B) preferably has a viscosity of 1000 mPa·s or more at 25°C and a viscosity of 400 mPa·s or more at 60°C.

The oligomer (B) is preferably at least one selected from the group consisting of polyester (meth)acrylate, epoxy (meth)acrylate, urethane (meth)acrylate, and polyacrylic (meth)acrylate.

The active energy ray-curable resin composition preferably further contains a reactive diluent.

In the active energy ray-curable resin composition, the content ratio [(A)/(B)] of the crosslinkable compound (A) and the oligomer (B) is 1/100 to 100/1 in mass ratio. Preferably.

The active energy ray-curable resin composition preferably further contains a compound represented by the following general formula (3).

The present invention is also a cured product of the active energy ray-curable resin composition described above.

ADVANTAGE OF THE INVENTION According to this invention, the active-energy-ray-curable resin composition which can provide viscosity and a desired characteristic which tend to become a trade-off relationship, and can be compatible can be provided. The active energy ray-curable resin composition of the present invention can provide a cured product having required properties such as thermal decomposition resistance, hardness, adhesion, toughness, or weather resistance, depending on the application. The active energy ray-curable resin composition and its cured product of the present invention are suitably used as industrial materials in a wide range of fields such as coating agents, inks, sealing materials, paints, adhesives and molding materials.

The present invention will be described in detail below.
A combination of two or more of the individual preferred embodiments of the invention described below is also a preferred embodiment of the invention.
Moreover, in this specification, "(meth)acrylate" means "acrylate and/or methacrylate", and "(meth)acrylic acid" means "acrylic acid and/or methacrylic acid".

1. The active energy ray-curable resin composition of the present invention comprises a crosslinkable compound (A) represented by the following general formula (1), which has a viscosity of 1000 mPa·s or more at 25°C, or a viscosity at 60°C of An active energy ray-curable resin composition comprising an oligomer (B) having a viscosity of 400 mPa·s or more and a polymerization initiator (C).

（式中、Ｚは、ｎ価の連結基を表す。ｎは、２以上の整数である。）

(Wherein, Z represents an n-valent linking group. n is an integer of 2 or more.)

The reason why the active energy ray-curable resin composition of the present invention can impart the required physical properties while maintaining a low viscosity due to the above configuration is that the crosslinkable compound has an ether structure. This is because the viscosity of the entire curable resin composition can be kept low even when it is mixed with a high-viscosity component. In addition, since the polymerizable group of the crosslinkable compound forms a ring structure and an ethylene chain by curing, properties such as hardness, thermal decomposition resistance, toughness, adhesion, and weather resistance can be expressed. .

Components contained in the active energy ray-curable resin composition of the present invention are described below.
(A) Crosslinkable compound The active energy ray-curable resin composition of the present invention (hereinafter also referred to as “the curable resin composition of the present invention”) has the following general formula (1):

（式中、Ｚは、ｎ価の連結基を表す。ｎは、２以上の整数である。）で表される架橋性化合物を含む。

(In the formula, Z represents an n-valent linking group. n is an integer of 2 or more.).

In the above formula (1), n is not particularly limited as long as it is 2 or more. When the curable resin composition of the present invention is used in applications requiring low viscosity, such as reactive diluents, n is more preferably 2-10, most preferably 2-6. Further, when the curable resin composition of the present invention is used for applications requiring coating film-forming properties such as binder resins for paints and inks, the above n is more preferably 5 to 50, and most preferably l0. ~50.

In the above formula (1), Z is a linking group capable of forming two or more covalent bonds with the carbonyl group of the α-allyloxymethylacryloyl group (hereinafter also referred to as "AMA group"), i.e., a covalent divalent It is not particularly limited as long as it is the above linking group, and it may be a divalent or higher linking group that bonds via a single atom, or a divalent or higher linking group that bonds via two or more atoms, From the viewpoints of ease of synthesis and chemical stability, it is preferably a linking group with a valence of 2 or more, which bonds via two or more atoms.
In addition, the above-mentioned AMA group refers to a group represented by the following general formula (2).

When the above Z is a divalent or higher linking group that bonds through only one atom, Z is not particularly limited, but an atom of Group 16 of the periodic table such as an oxygen atom and a sulfur atom; nitrogen atom, phosphorus Atoms of Group 15 of the Periodic Table such as atoms; Atoms of Group 14 of the Periodic Table such as carbon atoms, silicon atoms and germanium atoms; ) can be exemplified.

In the formula, R and R' represent a hydrogen atom or an organic group, and R and R' may be the same or different. The organic group may be any monovalent organic group capable of bonding to the above atoms, and is preferably a hydrocarbon group having 1 to 30 carbon atoms which may have a substituent.

When Z is a divalent or higher valent linking group that bonds through two or more atoms, Z may have a low-molecular-weight structure or a high-molecular-weight structure. The terms low-molecular structure and low-molecular skeleton described below generally mean structures and skeletons that do not have repeating units of monomer units, and conversely, the terms high-molecular structure and high-molecular skeleton described below In general, it means a structure or skeleton having repeating units made up of monomeric units.
The above Z includes at least the skeleton portion Q, furthermore, a divalent linking group X that binds the AMA group and Q, a divalent or higher linking group Y that binds two or more skeleton portions Q, directly to the skeleton portion Q It may also contain a monovalent substituent W that binds. In the n-valent linking group Z, n hydrogen atoms in the backbone portion Q may be substituted with AMA groups or X, and the remaining hydrogen atoms may be substituted with Y and/or W.
Taking a crosslinkable compound having two AMA groups as an example, the above crosslinkable compound can be represented, for example, by the following structural formula group (4).
For the sake of simplicity, in the formula, the AMA group is represented by A, and the structural examples are only part of the examples, and are not limited to these.

式中、Ｑ^ｎ、Ｘ^ｎ、Ｙ^ｎ、Ｗ^ｎ（ｎは、１以上の整数を表す。）は、Ｑ、Ｘ、Ｙ、Ｗがそれぞれｎ個ある場合のｎ個目のＱ、Ｘ、Ｙ、Ｗであることを表し、それぞれ同一であってもよく、異なっていてもよい。更に、ＡＭＡ基を２個有する架橋性化合物において、Ｑがシクロヘキサン骨格、Ｘが酸素原子、Ｙがウレタン結合、Ｗがフッ素原子であるような場合を例にとると、下記構造式群（５）に示すような化合物が具体的に挙げられる。なお、構造式群（５）に示した化合物は、そのような化合物群の一部の例であり、全ての例を示したものではない。構造式群（５）に示されるように、シクロヘキサン骨格の水素原子のうち、２個がＡＭＡ基又はＸに置換され、残りの水素原子は、Ｙ及び／又はＷに置換される場合もある。

In the formula, Q ⁿ , X ⁿ , Y ⁿ , W ⁿ (n represents an integer of 1 or more) is the n-th Q, X, Y and W, which may be the same or different. Furthermore, in a crosslinkable compound having two AMA groups, taking as an example a case where Q is a cyclohexane skeleton, X is an oxygen atom, Y is a urethane bond, and W is a fluorine atom, the following structural formula group (5) Specific examples include the compounds shown in the following. The compounds shown in Structural Formula Group (5) are some examples of such a compound group, and not all examples are shown. As shown in Structural Formula Group (5), two of the hydrogen atoms in the cyclohexane skeleton may be substituted with AMA groups or X, and the remaining hydrogen atoms may be substituted with Y and/or W.

As described above, Z consists of the skeleton moiety Q, furthermore, a divalent linking group X that binds to the AMA group, a divalent or higher linking group Y that binds two or more skeleton moieties Q, directly to the skeleton moiety Q It may also contain a monovalent substituent W that binds. When Z consists of two or more skeletal moieties Q, the Qs may be directly bonded to each other without the linking group Y intervening. Z may consist only of Q, i.e., an AMA group may be directly bonded to Q, but from the viewpoints of ease of synthesis, availability of raw materials, chemical stability, etc., Z may consist of at least Q and X. that is, the AMA group is bonded to Q via X, and further preferably the carbonyl group of the AMA group and X are bonded via a heteroatom. That is, Z is preferably an n-valent linking group that bonds to the AMA group via a heteroatom. Y and W may be appropriately selected according to the synthesis method and required performance in the application. Also, Z may be composed of two or more types of Q, X, Y and W, respectively.

Specific examples of Q, X, Y, and W are listed below, but are not limited to these. In Q below, the structure is exemplified as a compound, but when these are constituent elements of Z, two or more hydrogen atoms in the form in which the structure of Q is shown as a compound are bonded to Q It is in a form substituted by atoms or atomic groups (ie, AMA groups, Q, X, Y, W). Q, X, Y, and W are constituent elements of Z, but Z is not limited to being composed of compounds that can constitute Q, X, Y, and W, respectively. Assuming that Z is structurally decomposed into Q, X, Y, and W, the structures thereof and the forms in which these structures are shown as compounds are exemplified below.

The skeleton portion Q has two or more atoms forming the skeleton, and the AMA group and/or X can be bonded to the skeleton. If the structure of Q is shown as a compound, the atoms forming the skeleton are 2 or more, and the atoms forming the skeleton have 2 or more hydrogen atoms (i.e., hydrogen atoms that can be substituted with AMA groups and / or X) It is not particularly limited as long as it can be shown as a bonded compound and can serve as a skeleton portion of Z in a form in which the hydrogen atom is substituted with an AMA group and/or X. For example, if the structure of the skeleton portion Q is shown as a compound, it will be as follows.
Saturated hydrocarbon structures such as ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, heptadecane, octadecane, nonadecane, and eicosane; ethylene, propene, butene, Hydrocarbon monoene structures such as pentene, hexene, nonene, decene, undecene, dodecene, tridecene, tetradecene, pentadecene, hexadecene, heptadecene, octadecene, nonadecene, and eicosene; allene, butadiene, pentadiene, hexadiene, nonadiene, decadiene, undecadiene, dodecadiene , tridecadiene, tetradecadiene, pentadecadiene, hexadecadiene, heptadecadiene, octadecadiene, nonadecadiene, eicosadiene, etc.; acetylene, methylacetylene, and hexadiyne; cyclopentane, cyclopentene, cyclopentadiene, cyclohexane, cyclohexene, cyclohexadiene, norbornane, norbornene, norbornadiene, cyclodecane, dicyclopentadiene, adamantane, cyclopenta Alicyclic structures such as none, cyclohexanone, cyclooctanone, and various compounds represented by the following chemical formula group (6);

Aromatic hydrocarbon structures such as benzene, naphthalene, anthracene, phenanthrene, tetracene, chrysene, triphenylene, pyrene, perylene, biphenyl, and various compounds represented by the following chemical formula group (7);

ethylene oxide, ethyleneimine, oxetane, tetrahydrofuran, tetrahydropyran, dihydrofuran, dihydropyran, pyran, dioxane, pyrrolidine, piperidine, piperazine, morpholine, γ-lactone, δ-lactone, ε-caprolactone, γ-lactam, δ-lacram, Heterocyclic structures such as ε-caprolactam, oxazoline, succinic anhydride, maleic anhydride, succinimide, maleimide, glutaric anhydride, glutarimide, and various compounds represented by the following chemical formula group (8);

pyrrole, furan, thiophene, imidazole, oxazole, thiazole, pyrazole, isoxazole, isothiazole, pyridine, pyridazine, pyrazine, benzofuran, indole, benzimidazole, benzoxazole, benzothiazole, quinoline, quinoxaline, acridine, pyrimidine, triazine, carbazole , phenothiazine, quinacridone, xanthene, cyanuric acid, phthalic anhydride, phthalimide, heteroaromatic structures such as various compounds represented by the following chemical formula group (9);

Examples include low-molecular-weight skeletons such as
Also, a polyethylene skeleton represented by the following formula (10) obtained by (co)polymerizing an acyclic ethylenic compound such as ethylene, propylene, styrene, methyl acrylate, methyl methacrylate, vinyl acetate;

Cycloalkenes such as norbornene, unsaturated acid anhydrides such as maleic anhydride, and unsaturated cyclic compounds typified by maleimides such as phenylmaleimide. Main chain ring structure skeleton;

Polyethylene-main chain ring structure copolymer skeleton obtained by copolymerization of the above acyclic ethylenic compound and unsaturated cyclic compound; A polyether skeleton having an ether bond in the main chain obtained by ring (co)polymerization, etc.; a main chain obtained by dehydration condensation (co)polymerization of a dicarboxylic acid and a diol, ring-opening (co)polymerization of a cyclic lactone, etc. Polyester skeleton having an ester bond in; Polyamide skeleton having an amide bond in the main chain, obtained by dehydration condensation (co)polymerization of dicarboxylic acid and diamine, ring-opening (co)polymerization of cyclic lactam, etc.; dialkyldialkoxysilane A polysiloxane skeleton with siloxane bonds in the main chain obtained by dealcoholization condensation (co)polymerization or ring-opening (co)polymerization of cyclic siloxane; a urethane structure in the main chain obtained by reaction of diisocyanate and diol A polymer skeleton such as a polyurethane skeleton;

The skeleton portion Q can be appropriately set according to the application in which the crosslinkable compound is used. Polymer skeletons are preferred for applications that require coating film-forming properties, such as binder resins in materials, and may be used properly according to the application. Among the low-molecular-weight skeletons, at least one structure selected from the group consisting of a saturated hydrocarbon structure, an alicyclic structure, and an aromatic hydrocarbon structure in terms of raw material availability, chemical stability, etc. is preferred. Among the polymer skeletons, at least one skeleton selected from the group consisting of a polyethylene skeleton, a polyethylene-main chain cyclic structure copolymer skeleton, and a polyether skeleton in terms of ease of synthesis, chemical stability, etc. is preferably

The above X is not particularly limited as long as it is a divalent linking group. If you show the group, it will be as follows).

In the formula, R and R' are the same or different and are a hydrogen atom, an optionally substituted alkyl group having 1 to 30 carbon atoms, or an optionally substituted carbon number of 1 to Represents 30 aryl groups.
Among these, X is preferably an oxygen atom, a sulfur atom, a monosubstituted nitrogen atom, or a disubstituted carbon atom, and more preferably an oxygen atom or a monosubstituted nitrogen atom, in terms of ease of synthesis, chemical stability, etc. preferable. That is, the AX bond is more preferably an ester bond or an amide bond. When two or more X are present in Z, one type or two or more types may be used.

Y is not particularly limited as long as it is a linking group having a valence of 2 or more, and examples thereof include bonds represented by the following structural formula group (13).

In the formula, R and R' are the same or different and are a hydrogen atom, an optionally substituted alkyl group having 1 to 30 carbon atoms, or an optionally substituted carbon number of 1 to Represents 30 aryl groups.
Among these, ether bond, thioether bond, bond by divalent to tetravalent carbon atoms, ketonic bond, ester bond, amide bond, urethane bond, or silica An acid ester bond is preferred, and an ether bond, a bond with a divalent to tetravalent carbon atom, an ester bond, an amide bond, or a urethane bond is more preferred. When two or more Y are present in Z, one type or two or more types may be used.

The above W is not particularly limited as long as it is a monovalent substituent capable of bonding to the skeleton portion Q.
Examples of W above include atoms of group 17 of the periodic table such as fluorine atom, chlorine atom, bromine atom and iodine atom; methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, t-butyl , n-amyl, s-amyl, t-amyl, n-hexyl, s-hexyl, n-heptyl, n-octyl, s-octyl, t-octyl, 2-ethylhexyl, capryl, nonyl, decyl, undecyl, lauryl , tridecyl, myristyl, pentadecyl, cetyl, heptadecyl, stearyl, nonadecyl, eicosyl, ceryl, melisyl and other saturated hydrocarbon groups; vinyl, allyl, methallyl, crotyl, propargyl and other unsaturated hydrocarbon groups; cyclopentyl, cyclohexyl, 4- Alicyclic hydrocarbon groups such as methylcyclohexyl, 4-t-butylcyclohexyl, tricyclodecanyl, isobornyl, adamantyl, dicyclopentadienyl; phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, 4-t-butylphenyl , naphthyl, anthranyl and other aromatic hydrocarbon groups; hydroxy, methoxy, ethoxy, propoxy, butoxy, phenoxy, naphthoxy and other alkoxy groups; amino, methylamino, dimethylamino, methylethyl Amino groups such as amino groups and methylphenylamino groups; (meth)acryloyl groups, mercapto groups, thioalkoxy groups, cyano groups, nitro groups, isocyanato groups, thiocyanato groups, quaternary ammonium bases of amino groups, carboxyl groups, or salts thereof , a sulfonic acid group or its salt, a sulfinic acid group or its salt, a phosphoric acid group or its salt, and the like. These may be used properly depending on the application.

Preferred examples of the crosslinkable compound include compounds represented by the following general formulas (z1) to (z3).
AOR ¹ -OA (z1)
(In the formula, R ¹ is a divalent hydrocarbon group having 1 to 30 carbon atoms, —(R ² —O) _a —R ³ —, or —(R ² —O) _a —R ³ —(O —R ⁴ ) _b —, where R ² and R ⁴ are the same or different and represent a divalent linear or branched saturated hydrocarbon group having 1 to 10 carbon atoms, and R ³ is a carbon number represents a divalent hydrocarbon group of 1 to 20. a is an integer of 1 to 20. b is an integer of 1 to 20. A represents an AMA group.)

[A-(O-R ⁵ ) _c ] _m -R ⁶ -[(R ⁷ -O) _d -A] _n (z2)
(In the formula, R ⁵ and R ⁷ are the same or different and represent a divalent linear or branched saturated hydrocarbon group having 1 to 10 carbon atoms. R ⁶ is

represents
R ⁸ and R ⁹ are the same or different and each represents an optionally substituted linear or branched saturated hydrocarbon group having 1 to 20 carbon atoms. c represents an integer of 1 to 20; d represents an integer of 1-20. m and n are the same or different and represent an integer of 1 to 3; A represents an AMA group. )

R ¹⁰ —[(R ¹¹ —O) _e —A] ₃ (z3)
(In the formula, R ¹⁰ represents a trivalent heterocyclic group or a cyclic hydrocarbon group. R ¹¹ represents a C 1-10 divalent linear or branched saturated hydrocarbon group. e is an integer of 1 to 20. A represents an AMA group.)

In general formula (z1) above, R ¹ is preferably a divalent hydrocarbon group having 1 to 20 carbon atoms, more preferably a divalent hydrocarbon group having 1 to 15 carbon atoms.
R ² is preferably a divalent linear or branched saturated hydrocarbon group having 1 to 5 carbon atoms, and a bivalent linear or branched saturated hydrocarbon group having 1 to 4 carbon atoms. A hydrogen group is more preferred.
R ³ is preferably a divalent hydrocarbon group having 1 to 15 carbon atoms, more preferably a divalent hydrocarbon group having 1 to 10 carbon atoms.
R ⁴ is preferably a divalent linear or branched saturated hydrocarbon group having 1 to 5 carbon atoms, and a bivalent linear or branched saturated hydrocarbon group having 1 to 4 carbon atoms. A hydrogen group is more preferable.

In the general formula (z1), the divalent hydrocarbon group includes a divalent linear, branched or cyclic saturated hydrocarbon group or unsaturated hydrocarbon group, such as an alkylene group, An arylene group, a divalent hydrocarbon group having an aromatic ring or an alicyclic structure, and the like are included. Examples of the alicyclic structure include a cyclohexane skeleton, an adamantane skeleton, a norbornene skeleton, and the like.

In the general formula (z1), the divalent linear or branched saturated hydrocarbon group includes, for example, a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, a heptylene group, and the like. -C(CH ₃ ) ₂ -, -CH(CH ₃ )-, -CH(CH ₂ CH ₃ )-, -C(CH ₃ )(CH ₂ CH ₃ )-, -CH A branched alkylene group such as ₂ -CH(CH ₃ )- may be mentioned.

In the above general formula (z1), a is preferably an integer of 1-10, more preferably an integer of 1-5.
b is preferably an integer of 1-10, more preferably an integer of 1-5.

In the general formula (z2), R ⁵ and R ⁷ are the same or different and are preferably a divalent linear or branched saturated hydrocarbon group having 1 to 5 carbon atoms. It is more preferably a 4-divalent linear or branched saturated hydrocarbon group.
Examples of the divalent linear or branched saturated hydrocarbon group include the same divalent linear or branched saturated hydrocarbon groups in the above general formula (z1).

R ⁸ and R ⁹ are the same or different, and are preferably a monovalent linear or branched saturated hydrocarbon group having 1 to 15 carbon atoms and having 1 carbon atom; It is more preferably a monovalent linear or branched saturated hydrocarbon group of ∼10.
In the general formula (z2), examples of the monovalent linear or branched saturated hydrocarbon group include methyl, ethyl, n-propyl, 1-methylethyl, n-butyl, 1-methylpropyl, 2-methylpropyl, 1,1-dimethylethyl, n-pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, n-hexyl, 1,1-dimethylpropyl , 1,2-dimethylpropyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2 , 2-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,2,2-trimethylpropyl, 1-ethyl-1-methylpropyl, 1-ethyl- Linear or branched alkyl groups such as 2-methylpropyl, n-heptyl and the like can be mentioned.
A hydroxyl group, an alkyl group, an alkoxyl group, etc. are mentioned as said substituent.

In the above general formula (z2), c is preferably an integer of 1-10, more preferably an integer of 1-5.
d is preferably an integer of 1-10, more preferably an integer of 1-5.
m and n are the same or different and represent an integer of 1-3, preferably m+n=3-6.

In general formula (z3) above, R ¹⁰ represents a trivalent heterocyclic group or a cyclic hydrocarbon group. The carbon number of R ¹⁰ is preferably 3-15, more preferably 3-10.
As the trivalent heterocyclic group or cyclic hydrocarbon group, for example, trivalent groups having the above-described alicyclic structure, aromatic hydrocarbon structure, heterocyclic structure, heteroaromatic structure, isocyanuric acid skeleton and the like. Among them, a group having an isocyanuric acid skeleton is preferred.

R ¹¹ is preferably a divalent linear or branched saturated hydrocarbon group having 1 to 10 carbon atoms, and a bivalent linear or branched saturated hydrocarbon group having 1 to 5 carbon atoms. A hydrogen group is more preferable.
Examples of the divalent linear or branched saturated hydrocarbon group include the same divalent linear or branched saturated hydrocarbon groups in the above general formula (z1).
e is preferably an integer of 1-10, more preferably an integer of 1-5.

Specific examples of the crosslinkable compound preferably include the following.

The method for producing the crosslinkable compound is not particularly limited as long as the above crosslinkable compound can be obtained, and a known method may be used. methods and the like.

The curable resin composition of the present invention may contain only one type of the crosslinkable compound, or may contain two or more types thereof.

The content of the crosslinkable compound in the curable resin composition of the present invention may be appropriately designed according to the purpose and application of the curable resin composition. It is preferably 0.05 to 99% by mass, more preferably 0.1% by mass or more, and even more preferably 0.5% by mass or more. In addition, the content of the crosslinkable compound is more preferably 95% by mass or less, still more preferably 90% by mass or less, relative to 100% by mass of the solid content of the curable resin composition.
The solid content means the total amount of the components forming the cured product (excluding the solvent and the like that volatilize during the formation of the cured product) in the curable resin composition.

(B) Oligomer The active energy ray-curable resin composition of the present invention also contains an oligomer having a viscosity of 1000 mPa·s or more at 25°C or 400 mPa·s or more at 60°C. The curable resin composition of the present invention can be made into a low-viscosity resin composition even if it further contains the above-described relatively high-viscosity oligomer.

The oligomer preferably has a viscosity at 25° C. of 1100 mPa·s or more, more preferably 1200 mmPa·s or more. The upper limit of the viscosity of the oligomer at 25°C is not particularly limited, but from the viewpoint of handling, it is preferably 6,000,000 mPa·s or less.

The oligomer preferably has a viscosity at 60° C. of 420 mPa·s or more, more preferably 450 mmPa·s or more. Although the upper limit of the viscosity at 60° C. of the oligomer is not particularly limited, it is preferably 200,000 mPa·s or less from the viewpoint of handling.

More preferably, the oligomer satisfies the above range of viscosity at 25°C and the above range of viscosity at 60°C.
That is, the above oligomer preferably has a viscosity of 1000 mPa·s or more at 25°C, a viscosity of 400 mPa·s or more at 60°C, and a viscosity of 1100 mPa·s or more at 25°C. And, it is particularly preferable that the viscosity at 60° C. is 420 mPa·s or more.

In the present invention, the viscosity is a value measured at a predetermined temperature using a viscometer such as a cone-plate viscometer (TV-20L, manufactured by Toki Sangyo Co., Ltd.).

The oligomer is not particularly limited as long as it has the viscosity described above. polymer), polybutadiene (meth)acrylate, silicon (meth)acrylate, amino resin (meth)acrylate, and the like. These may be used alone or in combination of two or more. Among others, the oligomer more preferably contains at least one selected from the group consisting of polyester (meth)acrylate, epoxy (meth)acrylate, urethane (meth)acrylate, and polyacrylic (meth)acrylate.

Examples of the polyester (meth)acrylate include a (meth)acrylate of a polyester polyol composed of a polyol and a polybasic acid. The compound includes, for example, a hydroxyl group in a polyester chain or a terminal of a polyester obtained by polycondensation of a polybasic acid and a polyhydric alcohol on a main chain skeleton, and one or more carboxyl groups in a molecule such as (meth)acrylic acid. can be obtained by an esterification reaction with a (meth)acrylate having

Examples of the polybasic acid include aliphatic polybasic acids such as oxalic acid, succinic acid, malonic acid, adipic acid, sebacic acid, azelaic acid, maleic acid, fumaric acid, itaconic acid, succinic anhydride and maleic anhydride. Acids; alicyclic polybasic acids such as dimer acid, cyclohexanedicarboxylic acid and tetrahydrophthalic anhydride; aromatic polybasic acids such as phthalic acid, isophthalic acid, terephthalic acid, biphenyldicarboxylic acid, trimellitic acid and pyromellitic acid acid.
Examples of the polyhydric alcohol include glycol, hexanediol, diethylene glycol, tripropylene glycol, cyclohexanedimethanol, and polyol.

Specific examples of the above polyester (meth)acrylates include Aronix M-7100, Aronix M-8560 (manufactured by Toagosei Co., Ltd.), EBECRYL884 (manufactured by Daicel Allnex Co., Ltd.), and the like.

Examples of the epoxy (meth)acrylate include an addition reaction product of an oxirane ring-containing compound and a carboxyl group-containing (meth)acrylate.
Examples of the oxirane ring-containing compound include aromatic epoxy compounds such as bisphenol type epoxy, aliphatic epoxy compounds such as diglycidyl ether of diol having 2 to 20 carbon atoms, and alicyclic epoxy compounds.
Examples of the carboxyl group-containing (meth)acrylate include (meth)acrylic acid, β-carboxyethyl (meth)acrylate, mono(2-acryloyloxyethyl) succinate, mono(2-methacryloyloxyethyl) succinate, (Meth)acrylic acid dimer, (meth)acrylic acid caprolactam-modified, and the like.

Specific examples of the epoxy (meth)acrylate include bisphenol type epoxy acrylate, novolak type epoxy acrylate, aliphatic type epoxy acrylate, glycidyl ester type acrylate, and the like.

Examples of the urethane (meth)acrylates include addition reaction products of organic isocyanates, hydroxyl group-containing (meth)acrylic acid esters and polyhydric alcohols.

Examples of the organic isocyanate include aliphatic isocyanates such as butane diisocyanate, pentane diisocyanate and hexamethylene diisocyanate; alicyclic isocyanates such as cyclohexyl isocyanate, isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate; tolylene diisocyanate, xylylene diisocyanate and diphenylmethane diisocyanate. and aromatic isocyanates such as
Examples of the hydroxyl group-containing (meth)acrylic esters include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, and 2-hydroxypropyl (meth)acrylate. -hydroxybutyl, 3-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 2,3-hydroxypropyl (meth)acrylate and the like.
Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, neopentyl glycol, pentanediol, and butanediol.

Specific examples of the urethane (meth)acrylate include EBECRYL230 (manufactured by Daicel Allnex Co., Ltd.), CN929, CN964 (manufactured by Sartomer), Shiko UV-1700B, Shiko UV-3000B, Shiko UV- 7000B (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) and the like.

Examples of the polyacrylic (meth)acrylate include polymers obtained by pendant acryloyl groups to copolymerized acrylic polymers obtained by polymerizing acrylic monomers or vinyl monomers.

Specific examples of the polyacrylic acrylate include, for example, a polymer obtained by polymerizing a (meth)acrylic acid ester and an epoxy group-containing (meth)acrylate with (meth)acrylic acid added, and a (meth)acrylic Examples thereof include a polymer obtained by polymerizing an acid ester and (meth)acrylic acid with an epoxy group-containing (meth)acrylate added thereto.

Examples of the (meth)acrylate ester include methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate, and n-(meth)acrylate. -Butyl, s-butyl (meth)acrylate, n-amyl (meth)acrylate, s-amyl (meth)acrylate, n-hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, (meth) ) isodecyl acrylate, tridecyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, (meth) Examples include tetrahydrofurfuryl acrylate, dicyclopentanyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, 2-phenoxyethyl (meth)acrylate and the like.

Examples of the epoxy group-containing (meth)acrylate include glycidyl (meth)acrylate, β-methylglycidyl (meth)acrylate, β-ethylglycidyl (meth)acrylate, vinylbenzyl glycidyl ether, allyl glycidyl ether, ( (3,4-Epoxycyclohexyl)methyl meth)acrylate, vinylcyclohexene oxide and the like.

Examples of the dendrimer (hyperbranched polymer) include SIRIUS-501 and SUBARU-501 (manufactured by Osaka Organic Chemical Industry Co., Ltd.).

The weight-average molecular weight of the oligomer may be appropriately designed according to the purpose and application of the active energy ray-curable resin composition of the present invention, but is usually preferably 400 to 100,000. From the viewpoint of achieving both handleability and suitable cured product properties, the weight average molecular weight is more preferably 450 or more, still more preferably 500 or more, more preferably 70000 or less, and 50000 or less. It is even more preferable to have The weight average molecular weight is a value obtained by measuring by gel permeation chromatography (GPC).

The curable resin composition of the present invention may contain only one type of the oligomer, or may contain two or more types.

The content of the oligomer in the curable resin composition of the present invention may be appropriately designed according to the purpose and application of the curable resin composition. It is preferably 0.05 to 99% by mass, more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, more preferably 95% by mass or less, still more preferably 90% by mass. % by mass or less.

In the curable resin composition of the present invention, the content ratio [(A)/(B)] of the crosslinkable compound (A) and the oligomer (B) is 1/100 to 100/1 in mass ratio. is preferred. When the content is within the above range, the hardness, thermal decomposition resistance, toughness, adhesion, weather resistance, etc. of the cured product can be achieved at the same time.
The content ratio is more preferably 2/100 or more, more preferably 3/100 or more, more preferably 50/1 or less, and further preferably 20/1 or less in mass ratio. preferable.

(C) Polymerization Initiator The active energy ray-curable resin composition of the present invention further contains a polymerization initiator. The active energy ray-curable resin composition of the present invention can be cured by initiating radical polymerization by heating and/or irradiation with active energy rays such as electromagnetic waves and electron beams. It can be hardened more effectively.

Examples of the radical polymerization initiator include thermal radical initiators that generate radicals by heating and photoradical initiators that generate radicals by irradiation with active energy rays, and one or more of these may be used. can be done.
In addition, one or two or more commonly used radical polymerization accelerators, photosensitizers, and the like may be added as necessary.

Examples of the thermal radical initiator include known organic peroxide-based initiators and azo-based initiators, and specific examples include the following.
methyl ethyl ketone peroxide, cyclohexanone peroxide, methylcyclohexanone peroxide, methyl acetoacetate peroxide, acetyl acetate peroxide, 1,1-bis(t-hexylperoxy)-3,3,5-trimethylcyclohexane, 1,1- bis(t-hexylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(t-butylperoxy)-2-methylcyclohexane, 1,1-bis(t-butylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)cyclododecane, 1,1-bis(t-butylperoxy)butane, 2,2-bis(4 ,4-di-t-butylperoxycyclohexyl)propane, p-menthane hydroperoxide, diisopropylbenzene hydroperoxide, 1,1,3,3-tetramethylbutyl hydroperoxide, cumene hydroperoxide, t-hexyl Hydroperoxide, t-butyl hydroperoxide, α,α'-bis(t-butylperoxy)diisopropylbenzene, dicumyl peroxide, 2,5-dimethyl-2,5-bis(t-butylperoxy) Hexane, t-butyl cumyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis(t-butylperoxy)hexyne-3, isobutyryl peroxide, 3,5,5- trimethylhexanoyl peroxide, octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, succinic acid peroxide, m-toluoyl benzoyl peroxide, benzoyl peroxide, di-n-propylperoxydicarbonate, diisopropylperoxide carbonate, bis(4-t-butylcyclohexyl)peroxydicarbonate, di-2-ethoxyethylperoxydicarbonate, di-2-ethoxyhexylperoxydicarbonate, di-3-methoxybutylperoxydicarbonate, di -s-butyl peroxydicarbonate, di(3-methyl-3-methoxybutyl)peroxydicarbonate, α,α'-bis(neodecanoylperoxy)diisopropylbenzene, cumyl peroxyneodecanoate, 1 , 1,3,3,-tetramethylbutyl peroxyneodecanoate, 1- cyclohexyl-1-methylethyl peroxyneodecanoate, t-hexyl peroxyneodecanoate, t-butyl peroxyneodecanoate, t-hexyl peroxypivalate, t-butyl peroxypivalate, 1 , 1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, 2,5-dimethyl-2,5-bis(2-ethylhexanoylperoxy)hexanoate, 1-cyclohexyl-1-methylethyl Peroxy-2-ethylhexanoate, t-hexylperoxy-2-ethylhexanoate, t-butylperoxy-2-ethylhexanoate, t-hexylperoxyisopropyl monocarbonate, t-butylperoxy isobutyrate, t-butyl peroxymalate, t-butyl peroxy-3,5,5-trimethylhexanoate, t-butyl peroxylaurate, t-butyl peroxy isopropyl monocarbonate, t-butyl peroxy Oxy-2-ethylhexyl monocarbonate, t-butyl peroxyacetate, t-butyl peroxy-m-toluylbenzoate, t-butyl peroxybenzoate, bis (t-butyl peroxy) isophthalate, 2,5-dimethyl- 2,5-bis(m-toluylperoxy)hexane, t-hexylperoxybenzoate, 2,5-dimethyl-2,5-bis(benzoylperoxy)hexane, t-butylperoxyallyl monocarbonate, t- Organic peroxide initiators such as butyltrimethylsilyl peroxide, 3,3′,4,4′-tetra(t-butylperoxycarbonyl)benzophenone, and 2,3-dimethyl-2,3-diphenylbutane.

2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile, 1-[(1-cyano-1-methylethyl)azo]formamide, 1,1′-azobis(cyclohexane-1-carbonitrile), 2, 2′-azobis(2-methylbutyronitrile), 2,2′-azobisisobutyronitrile, 2,2′-azobis(2,4-dimethylvaleronitrile), 2,2′-azobis(2, 4-dimethyl-4-methoxyvaleronitrile), 2,2′-azobis(2-methylpropionamidine) dihydrochloride, 2,2′-azobis(2-methyl-N-phenylpropionamidine) dihydrochloride, 2,2 '-azobis[N-(4-chlorophenyl)-2-methylpropionamidine]dihydrochloride, 2,2'-azobis[N-(4-hydrophenyl)-2-methylpropionamidine]dihydrochloride, 2,2' -azobis[2-methyl-N-(phenylmethyl)propionamidine]dihydrochloride, 2,2'-azobis[2-methyl-N-(2-propenyl)propionamidine]dihydrochloride, 2,2'-azobis[ N-(2-hydroxyethyl)-2-methylpropionamidine]dihydrochloride, 2,2'-azobis[2-(5-methyl-2-imidazolin-2-yl)propane]dihydrochloride, 2,2'- Azobis[2-(2-imidazolin-2-yl)propane]dihydrochloride, 2,2′-azobis[2-(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl) Propane]dihydrochloride, 2,2′-azobis[2-(3,4,5,6-tetrahydropyrimidin-2-yl)propane]dihydrochloride, 2,2′-azobis[2-(5-hydroxy-3 ,4,5,6-tetrahydropyrimidin-2-yl)propane]dihydrochloride, 2,2′-azobis{2-[1-(2-hydroxyethyl)-2-imidazolin-2-yl]propane}dihydrochloride , 2,2′-azobis[2-(2-imidazolin-2-yl)propane], 2,2′-azobis{2-methyl-N-[1,1-bis(hydroxymethyl)-2-hydroxyethyl ]propionamide}, 2,2′-azobis{2-methyl-N-[1,1-bis(hydroxymethyl)ethyl]propionamide}, 2,2′-azobis[2-methyl-N-(2- hydroxyethyl)propionamide] , 2,2′-azobis(2-methylpropionamide), 2,2′-azobis(2,4,4-trimethylpentane), 2,2′-azobis(2-methylpropane), dimethyl-2,2 -Azo initiators such as azobis(2-methylpropionate), 4,4'-azobis(4-cyanopentanoic acid) and 2,2'-azobis[2-(hydroxymethyl)propionitrile].

The radical polymerization accelerator that can be used together with the thermal radical initiator is not particularly limited as long as it promotes decomposition of the thermal radical initiator (generation of initiation radicals), and commonly used ones can be used. Examples of the radical polymerization accelerator that can be used include organic salts, inorganic salts, oxides, metal complexes of metals, amine compounds, quaternary ammonium salts, thiourea compounds, ketone compounds, and the like. Specific examples of the radical polymerization accelerator include those described in paragraph [0089] of Japanese Patent No. 5689628.

Examples of the photoradical initiator include alkylphenone-based compounds, benzophenone-based compounds, benzoin-based compounds, thioxanthone-based compounds, halomethylated triazine-based compounds, halomethylated oxadiazole-based compounds, biimidazole-based compounds, oxime ester-based compounds, and titanocene. compounds, benzoic acid ester compounds, and acridine compounds are preferred, and specific examples thereof include the following. 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexylphenylketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-[4-(2- hydroxyethoxy)phenyl]-2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl)benzyl]phenyl}-2- Methylpropan-1-one, 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone- Alkylphenone compounds such as 1,2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]-1-butanone; benzophenone, 4,4' - Benzophenone compounds such as bis(dimethylamino)benzophenone and 2-carboxybenzophenone; Benzoin compounds such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; Thioxanthone, 2-ethylthioxanthone, 2-isopropylthioxanthone , 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone and other thioxanthone compounds; 2-(4-methoxyphenyl)-4,6-bis(trichloromethyl)-s-triazine, 2- (4-Methoxynaphthyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-ethoxynaphthyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-ethoxy halomethylated triazine compounds such as carboxynylnaphthyl)-4,6-bis(trichloromethyl)-s-triazine;

2-trichloromethyl-5-(2'-benzofuryl)-1,3,4-oxadiazole, 2-trichloromethyl-5-[β-(2'-benzofuryl)vinyl]-1,3,4-oxa Halomethylated oxadiazole compounds such as diazole, 4-oxadiazole, 2-trichloromethyl-5-furyl-1,3,4-oxadiazole; 2,2'-bis(2-chlorophenyl)-4 ,4′,5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis(2,4-dichlorophenyl)-4,4′,5,5′-tetraphenyl-1,2 Biimidazole compounds such as '-biimidazole, 2,2'-bis(2,4,6-trichlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole;1 , 2-octanedione, 1-[4-(phenylthio)-, 2-(O-benzoyloxime)], ethanone, 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazole-3- yl]-,1-(O-acetyloxime) and other oxime ester compounds; bis(η5-2,4-cyclopentadien-1-yl)-bis(2,6-difluoro-3-(1H-pyrrole- 1-yl)-phenyl)titanium and other titanocene compounds; p-dimethylaminobenzoic acid, p-diethylaminobenzoic acid and other benzoic acid ester compounds; 9-phenylacridine and other acridine compounds.

A photosensitizer or a radical polymerization accelerator may be used together with the photoradical initiator. Such photosensitizers and radical polymerization accelerators are not particularly limited, and commonly used ones can be used. Specific examples of the photosensitizer and radical polymerization accelerator used together with the photoradical initiator include, for example, those described in Japanese Patent No. 5689628, paragraph [0092].

The curable resin composition of the present invention may contain only one type of the polymerization initiator, or may contain two or more types thereof.
The content of the polymerization initiator is not particularly limited and can be appropriately designed according to the purpose and application. % by mass, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, more preferably 7% by mass or less, and 5% by mass or less It is even more preferable to have

The total amount of the radical polymerization accelerator and the photosensitizer to be added is not particularly limited, and can be appropriately formed depending on the purpose and application. It is preferably 0 to 8% by mass, more preferably 0 to 7% by mass, and even more preferably 0 to 5% by mass.

(D) Compound D
The active energy ray-curable resin composition of the present invention preferably further contains a compound represented by the following general formula (3) (hereinafter referred to as "compound D"). By including the above compound, it is possible to achieve both good handling properties and suitable cured product properties.

When the curable resin composition of the present invention contains the compound D, the content of the compound D is 0.1 to 50% by mass with respect to 100% by mass of the solid content of the curable resin composition. It is preferably 0.1 to 40% by mass, and even more preferably 0.1 to 30% by mass.

(E) Other Additives The active energy ray-curable resin composition of the present invention may further contain other additives according to the purposes and uses of the curable resin composition. Examples of the other additives include solvents, reactive diluents, curing accelerators such as dryers, stabilizers, colorants, dispersants, fillers, adhesion improvers, release agents, plasticizers, and UV absorbers. agents, matting agents, antifoaming agents, leveling agents, antistatic agents, slip agents, surface modifiers, coupling agents, acid generators and the like. These additives are not particularly limited, and may be appropriately selected from known ones according to the purpose and application. Those similar to those described can be suitably used. The content of these additives can be appropriately set from known techniques. Among the additives, the active energy ray-curable resin composition preferably contains a reactive diluent.

(reactive diluent)
The reactive diluent is a low-molecular-weight compound having a polymerizable group that can be polymerized by heating or irradiation with active energy rays. It can also be used for , and is preferably used for solventless applications. Examples of such reactive diluents include compounds having a radically polymerizable group such as a carbon-carbon unsaturated bond, compounds having a cationically polymerizable group such as an epoxy group, an oxetanyl group, and a vinyl ether group, and radically polymerizable diluents. Hybrid type compounds having both groups and cationically polymerizable groups are commonly used. When the curable resin composition of the present invention contains a reactive diluent, a commonly used reactive diluent can be used, and one or more of them may be appropriately selected depending on the purpose and application. Although not limited, the curable resin composition of the present invention contains a radically polymerizable crosslinkable compound. A diluent is preferable because a synergistic effect is likely to be obtained. Examples of such a radically polymerizable reactive diluent include a monofunctional radically polymerizable monomer having only one radically polymerizable unsaturated group in the same molecule and a polyfunctional radically polymerizable monomer having two or more radically polymerizable unsaturated groups. and a sexual monomer.

Examples of the monofunctional radically polymerizable monomer include (meth)acrylic acid esters, (meth)acrylamides, unsaturated polyvalent monocarboxylic acids, unsaturated monocarboxylic acids, unsaturated acid anhydrides , aromatic vinyls, N-substituted maleimides, conjugated dienes, vinyl esters, vinyl ethers, N-vinyl compounds, unsaturated isocyanates, etc. Specifically, the paragraph [ 0104] to [0105].

Examples of the polyfunctional radically polymerizable monomer include polyfunctional (meth)acrylates, polyfunctional vinyl ethers, vinyl ether group-containing (meth)acrylic acid esters, polyfunctional allyl ethers, allyl group-containing ( meth)acrylic acid esters, polyfunctional (meth)acryloyl group-containing isocyanurates, polyfunctional allyl group-containing isocyanurates, polyfunctional allyl group-containing isocyanurates, polyfunctional urethane (meth)acrylates, polyfunctional aromatics Examples include vinyls, and more specifically, monofunctional radically polymerizable monomers described in paragraphs [0106] to [0108] of Japanese Patent No. 5689628.

When the curable resin composition of the present invention contains the reactive diluent, the content of the reactive diluent may be appropriately set according to the purpose and application, and is not particularly limited. It is preferably from 0 to 1,500% by mass, more preferably from 0 to 1,000% by mass, and even more preferably from 0 to 800% by mass.

(stabilizer)
The stabilizer is not particularly limited as long as it is a compound that reacts with radicals generated from a photoradical polymerization initiator or the like to prevent polymerization. system, nitroso system, etc. can be used. Among them, hydroquinone-based, semi-hindered phenol-based, (thio)phosphite-based, phosphine-based, thioether-based, nitroso-based, and piperazine-based stabilizers are preferable as the stabilizer. Semi-hindered phenol-based, (Thio)phosphite-based and thioether-based are more preferred. Specifically, as the stabilizer, those described in paragraphs [0021] to [0051] of Japanese Patent No. 6125933 can be preferably used. The above stabilizers may be used alone or in combination of two or more.
The content of the stabilizer is preferably 0.0001 to 5% by mass, more preferably 0.001 to 3% by mass, relative to 100% by mass of the solid content of the curable resin composition, More preferably, it is 0.01 to 2% by mass.

Even when the curable resin composition of the present invention contains a highly viscous oligomer, the viscosity of the composition can be kept low because the crosslinkable compound has a relatively low viscosity. Therefore, a wide range of composition of the curable resin composition is possible, and it can have various properties required according to the application.
The viscosity of the curable resin composition of the present invention is not particularly limited, and may be appropriately set according to the purpose and application. more preferred.
The above viscosity is a value measured at 25° C. using a viscometer such as a cone-plate viscometer (TV-20L, manufactured by Toki Sangyo Co., Ltd.).

(Method for preparing active energy ray-curable resin composition)
The method for preparing the active energy ray-curable resin composition of the present invention is not particularly limited. It can be prepared by mixing the above-mentioned other additives and the like using a known device such as a paint shaker, bead mill, kneader, or mixer.

(Curing method of curable resin composition)
The method for curing the active energy ray-curable resin composition of the present invention is not particularly limited, and depending on the purpose and application of the curable resin composition, heating, irradiation with an active energy ray, or under an atmosphere containing oxygen. It may be appropriately selected from known methods such as exposure to . These methods may be performed singly or in combination of two or more.

The temperature conditions for the heat curing may be appropriately set according to the composition of the curable resin composition. 400°C is preferred, 70 to 350°C is more preferred, and 100 to 350°C is even more preferred. When a curing accelerator is used in combination, the curing can be performed at a lower temperature than when not used in combination, preferably 0 to 400°C, more preferably 10 to 350°C, and even more preferably 20 to 350°C.

Curing by heating may be carried out in one step or in two or more steps. You can go later. For example, it is preferably 150° C. or higher, more preferably 180° C. or higher, and still more preferably after being crosslinked to some extent by heating at a low temperature, short-term active energy ray irradiation, or the like, and then undergoing treatment such as development. The step of curing at a high temperature of 200° C. or higher is also called post-baking or post-curing, and is preferable because it allows the cross-linking reaction to proceed further.

As the active energy ray in the curing method by irradiating the active energy ray, those commonly used can be used, and electromagnetic waves such as gamma rays, X-rays, ultraviolet rays, visible rays, infrared rays, electron beams, neutron beams, protons, etc. Particle beams such as rays can be used. Among these, gamma rays, X-rays, extreme ultraviolet rays, ultraviolet rays, visible rays, and electron beams are preferred in terms of energy strength and energy ray generators, and extreme ultraviolet rays, ultraviolet rays, visible rays, and electron beams are more preferred. Preferred, and most preferred is ultraviolet light. When a curing accelerator is not used in combination, it is preferable to use active energy rays with high energy such as gamma rays, X-rays, and electron beams. Active energy rays, which are relatively weak but are easy to generate and economical, can be preferably used.

The curing method by exposure to an atmosphere containing oxygen is a method of curing by exposing the curable resin composition to an atmosphere containing oxygen, and the oxygen concentration in the atmosphere is 5% by volume or more. is preferred, more preferably 10% by volume or more, and most preferably 18% by volume or more. That is, it is most preferable that the oxygen concentration is equal to or higher than the oxygen concentration in the air. Further, the curing method by heating and/or the curing method by irradiation with active energy rays may be used in combination. In particular, a curing method involving heating in the air and/or irradiation with an active energy ray is a preferable curing method as a curing method that can be easily used in combination.

2. Cured Product As described above, the active energy ray-curable resin composition of the present invention can maintain a relatively low viscosity even when a high-viscosity component is added. Therefore, it is possible to design a wider range of curable resin compositions than in the past, and it is possible to impart desired properties to the cured product obtained by curing the curable resin composition. A cured product of such an active energy ray-curable resin composition is also one aspect of the present invention.

When the cured product is a cured film, its thickness may be appropriately set according to the purpose and application. be.

The properties of the cured product can be changed depending on the composition of the active energy ray-curable resin composition. It can be excellent in physical properties.

3. Uses The active energy ray-curable resin composition of the present invention contains the above-mentioned crosslinkable compound and thus exhibits extremely excellent curability. In addition, even if a high-viscosity oligomer is blended, a relatively low-viscosity curable resin composition can be prepared. It is possible to give a cured product having properties required according to the application.
Such active energy ray-curable resin compositions and cured products thereof of the present invention are, for example, adhesives, pressure-sensitive adhesives, biomaterials, dental materials, optical members, information recording materials, optical fiber materials, color filter resists, solders. Resists, plating resists, black resists, semiconductor photoresists, TFT formation resists, EUV/KrF/ArF/g-line/i-line resists, 3D printing resins, UV curable inkjet inks, photospacers/black columns, UV curable for automobiles Paints/coating materials, optical fiber coating materials, hard coating materials for films, UV curable paints/coating materials for electrical appliances, buffer coats, rewiring materials, back grind tapes, dicing tapes, UV curable paints, insulators, Sealing material, inkjet ink, printing ink, paint, casting material, decorative plate, WPC, coating material, photosensitive printing plate, OCA/OCR for touch panel, coverlay film, dry film, dry film resist, lining material, civil engineering Building materials, putty, repair materials, flooring materials, pavement gel coats, overcoats, molding materials such as hand lay-up, spray-up, pultrusion, filament winding, SMC, BMC, polymer solid electrolytes, resins for lens molding, micro It can be suitably used in a wide variety of applications such as lens molding resins.

As described above, the active energy ray-curable resin composition and the cured product thereof of the present invention can have a desired composition while maintaining a low viscosity, and have suitable properties required in various technical fields and applications. can be given to

EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited only to these examples. Unless otherwise specified, "part" means "mass part" and "%" means "mass %".

In the present examples, various physical properties were measured by the following methods.
<Viscosity>
The viscosity of the curable resin composition was measured at a temperature of 25° C. using a cone-plate viscometer (TV-20L, manufactured by Toki Sangyo Co., Ltd.).

<Thermal decomposition temperature>
The thermal decomposition temperature of the cured product of the curable resin composition was measured using a thermogravimetric thermal analyzer (TG-DTA2010SA, manufactured by Bruker) under the following conditions.
Measurement temperature range: Room temperature to 500°C
Heating rate: 10°C/min
Atmosphere and flow rate: Nitrogen-50 ml/min

<Glass transition temperature (Tg)>
The glass transition temperature (Tg) of the cured product of the curable resin composition was obtained by measuring with the following differential scanning calorimeter and conditions in accordance with JIS K7121, and by the midpoint method.
Apparatus: DSC3500 (manufactured by Netch Japan)
Heating rate: 10°C/min
Atmosphere and flow rate: Nitrogen-50 ml/min

(Production Example 1) Production of crosslinkable compound (TPG-AOMA)
A separable flask was charged with a stir bar, titanium tetraisopropoxide (TTIP) 2.27 g (8 mmol), tripropylene glycol 38.5 g (200 mmol), α-allyloxymethyl acrylate (AOMA) 124.9 g (800 mmol), Polymerization inhibitor (6-t-butyl-2,4-xylenol, manufactured by Tokyo Chemical Industry Co., Ltd.) 120 mg (1000 ppm with respect to AOMA), polymerization inhibitor (Polystop 7300P, manufactured by Hakuto Co., Ltd.) 60 mg ( 500 ppm with respect to AOMA) and 60.0 g of toluene as an azeotropic agent were weighed. While bubbling a mixed gas (N ₂ /O ₂ =92/8 (v/v)), the temperature was raised to 100° C. while reducing the pressure in the system to 300 Torr. An appropriate fraction was removed, and the same mass of toluene was newly added to the system for reaction, and heating was continued until the conversion of triethylene glycol reached >99%.
After the reaction, the pressure in the system is reduced while bubbling a mixed gas (N ₂ /O ₂ =92/8 (v/v)), and toluene and residual AOMA are distilled off. YFLC AI-580, manufactured by Yamazen Co., Ltd.) was used to collect the target fraction, and the collected fraction was added with a polymerization inhibitor (6-t-butyl-2,4-xylenol, manufactured by Tokyo Chemical Industry Co., Ltd.) for the target sample. 300 ppm of the target sample and 500 ppm of a polymerization inhibitor (triphenyl phosphite, manufactured by ADEKA) were added to the target sample, and the solvent was distilled off to isolate the target sample TPG-AOMA.

(Production Example 2) Production of crosslinkable compound (DPG-AOMA) In Production Example 1, except that dipropylene glycol was used instead of tripropylene glycol, the same method as in Production Example 1 was used to prepare a crosslinkable compound (DPG-AOMA). -AOMA).

(Examples 1 to 6, Comparative Examples 1 to 3)
According to the formulation shown in Table 1, a crosslinkable compound, an oligomer, and a polymerization initiator were mixed to prepare curable resin compositions of Examples 1-6. The obtained curable resin composition was evaluated for viscosity. Table 1 shows the results.

As for the oligomers listed in Table 1, the following were used. In addition, the blending amount of each component described in Table 1 is the amount in terms of solid content.
Polyester acrylate: EBECRYL884, viscosity (25°C) 25000 mPa s, urethane acrylate manufactured by Daicel Allnex: CN964, viscosity (60°C) 1770 mPa s, epoxy acrylate manufactured by Sartomer: Epoxy ester 70PA, viscosity (25°C) 1174 mPa s s, manufactured by Kyoeisha Chemical Co., Ltd.

From Table 1, it was confirmed that the curable resin composition containing a crosslinkable compound having an AMA group, an oligomer, and a polymerization initiator has a much lower viscosity than the high-viscosity oligomer alone.

(Comparative Examples 4-9)
Further, curable resin compositions of Comparative Examples 4 to 9 were prepared by mixing oligomers, polymerization initiators, and reactive diluents according to the formulations shown in Table 2.
Each curable resin composition of Examples 1 to 6 and Comparative Examples 4 to 9 obtained above was put in an aluminum pan and irradiated with ultraviolet rays under the following conditions to obtain an evaluation sample of the cured product. Thermal decomposition temperature and glass transition temperature (Tg) were measured. Table 2 shows the results.
UV irradiation device: HCT400B-28HB (manufactured by Sen Special Light Source Co., Ltd.)
Accumulated amount of light: 15 J/cm ²

The following oligomers, polymerization initiators, and reactive diluents shown in Table 2 were used. In addition, the blending amount of each component described in Table 2 is the amount in terms of solid content.
Polyester acrylate: EBECRYL884, viscosity (25°C) 25000 mPa s, urethane acrylate manufactured by Daicel Allnex: CN964, viscosity (60°C) 1770 mPa s, epoxy acrylate manufactured by Sartomer: Epoxy ester 70PA, viscosity (25°C) 1174 mPa s s, polymerization initiator manufactured by Kyoeisha Chemical Co., Ltd.: Omnirad 184, TPG-A manufactured by IGM Resins: tripropylene glycol diacrylate, APG-200, PEA manufactured by Shin-Nakamura Chemical Co., Ltd.: phenoxyethyl acrylate

From Table 2, the curable resin composition containing a crosslinkable compound having an AMA group, an oligomer, and a polymerization initiator is a curable resin composition containing a reactive diluent having two or more acryloyl groups, an oligomer, and a polymerization initiator. It was confirmed that a cured product having excellent thermal decomposition resistance and heat resistance was obtained as compared with a curable resin composition containing no cross-linkable compound.

Claims (7)

A crosslinkable compound (A) represented by the following general formula (1), an oligomer (B) having a viscosity of 1000 mPa s or more at 25°C or a viscosity of 400 mPa s or more at 60°C, and , an active energy ray-curable resin composition comprising a polymerization initiator (C).

(Wherein, Z represents an n-valent linking group. n is an integer of 2 or more.) The active energy ray-curable according to claim 1, wherein the oligomer (B) has a viscosity of 1000 mPa·s or more at 25°C and a viscosity of 400 mPa·s or more at 60°C. Resin composition. 3. The oligomer (B) according to claim 1 or 2, which is at least one selected from the group consisting of polyester (meth)acrylate, epoxy (meth)acrylate, urethane (meth)acrylate, and polyacrylic (meth)acrylate. Active energy ray-curable resin composition. 4. The active energy ray-curable resin composition according to any one of claims 1 to 3, further comprising a reactive diluent. Claims 1 to 4, wherein the content ratio [(A)/(B)] of the crosslinkable compound (A) and the oligomer (B) is 1/100 to 100/1 in mass ratio. The active energy ray-curable resin composition according to any one of . 6. The active energy ray-curable resin composition according to any one of claims 1 to 5, further comprising a compound represented by the following general formula (3).

A cured product of the active energy ray-curable resin composition according to any one of claims 1 to 6.