JP2016135477A - Film forming method of substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film forming method which is excellent in maintainability of functionality and water-resistant adhesion, and modifies the surface of the substrate and imparts the functionality to the surface thereof.SOLUTION: A film forming method onto a substrate includes sequentially performing the following steps (1) to (3) on a substrate: a step (1): forming an undercoat film layer using a composition (1) containing a resin (A) having an isocyanate reactive group and a photopolymerization initiation portion and an isocyanate group-containing polymerizable unsaturated compound (B); a step (2): forming a functionality-imparting layer on the substrate having the undercoat film layer formed thereon in the step (1) using a composition (2) containing a functionality imparting group-containing polymerizable unsaturated compound; and a step (3): irradiating the substrate having the undercoat film layer and the functionality-imparting layer formed thereon in the steps (1) and (2) with an active energy beam.SELECTED DRAWING: None

Description

  The present invention mainly relates to a method for forming a film for modifying the surface of a substrate to impart functionality.

  Conventionally, attempts have been made to impart various functions to organic substrates such as inorganic substrates and plastic substrates. For example, in order to make a plastic substrate surface hydrophilic, a method of introducing a polar group into the substrate surface by performing flame treatment, corona treatment, plasma treatment or the like is known.

  However, in the method of introducing a polar group by such physical treatment, the functionality such as hydrophilicity imparted by the introduced polar group deteriorates with time, and there is a problem in sustainability.

  Patent Document 1 discloses an antifouling paint comprising a fluorine-based silane coupling agent, a non-aqueous solvent, and a surfactant that lowers the surface tension of the gas-liquid interface. However, this method using an antifouling paint has a problem that its adhesion is insufficient when applied to an organic base material compared to an inorganic base material.

  In Patent Document 2, as a method for producing an article having a surface layer with good substrate adhesion, the surface of an undercoat layer made of a polymer laminated on a substrate and having a photopolymerization initiation portion chemically bonded thereto In addition, a method is disclosed in which ultraviolet rays are irradiated in a state where the functional monomer is in contact with the functional monomer, and the functional monomer is graft-polymerized on the undercoat layer. However, this method, especially when the film thickness of the undercoat layer is thick, is insufficient in the durability of the reforming performance and adhesion after water loading (water-resistant adhesion), or cracking occurs in the undercoat layer. There was a problem that there was.

  Patent Document 3 discloses a method for coating a photoinitiator having at least one ethylenically unsaturated group as a method for producing a coating having excellent adhesion on an inorganic or organic substrate. A method is disclosed in which a graft reaction is carried out on the surface of a material, a photocurable coating is applied to the base material thus provided with a graft layer, and this is cured.

  However, this method has a very short time during which radicals can effectively exist during the grafting reaction of the photoinitiator, is easily affected by the inhibition of curing by oxygen, and uses a gas phase reaction. For this reason, there is a difficulty in workability in a large base material and a fixed base material.

  In addition, when applied to a heat-sensitive substrate such as plastic due to heat generated during the grafting reaction, there is also a problem that the substrate is thermally deformed.

JP 2011-207924 A JP-A-9-77891 Special table 2002-528568 gazette

  The present invention has been made in consideration of the above circumstances, and is suitable for a base material that is easily deformed by heat, such as plastic, is simple and excellent in productivity, and has long-lasting functionality and adhesion to water. It is an object of the present invention to provide a film forming method for imparting functionality by modifying the surface of a substrate, which is excellent in properties.

  As a result of intensive investigations to achieve the above object, the present inventors have found that a primer having an isocyanate-reactive group and a photopolymerization initiation part on a substrate and an isocyanate group-containing polymerizable unsaturated compound. It has been found that the above object can be achieved by a film forming method in which an active energy ray is irradiated after forming a film layer and then forming a functional layer containing a functional group-containing polymerizable unsaturated compound. .

  That is, the present invention includes the following aspects.

Item 1, on the substrate,
Step (1): Using the composition (1) containing the resin (A) having an isocyanate-reactive group and a photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B), an undercoat coating layer is formed. Forming step,
Step (2): Functionality is imparted using the composition (2) containing a functionally-imparting group-containing polymerizable unsaturated compound on the substrate on which the undercoat coating layer has been formed in the step (1). A step of forming a layer, and a step (3): a step of irradiating active energy rays on the substrate on which the undercoat coating film layer and the functionality-imparting layer are formed by the steps (1) and (2),
A method of forming a film on a substrate, characterized in that

  Item 2. The film forming method according to Item 1, wherein the resin (A) having an isocyanate-reactive group and a photopolymerization start part is a hydroxyl group-containing resin (A1) having a photopolymerization start part.

  Item 3. The film forming method according to Item 2, wherein the hydroxyl value of the hydroxyl group-containing resin (A1) having a photopolymerization initiation part is 15 to 240 mgKOH / g.

  Item 4. The film forming method according to Item 2 or 3, wherein the hydroxyl group-containing resin (A1) having a photopolymerization initiation part is a hydroxyl group-containing acrylic resin having a photopolymerization initiation part.

  Item 5. The film forming method according to Item 4, wherein the hydroxyl group-containing acrylic resin having a photopolymerization initiation part is a hydroxyl group-containing acrylic resin having a photopolymerization initiation part and a polymerizable unsaturated group.

  Item 6. The film forming method according to any one of Items 1 to 5, wherein the isocyanate group-containing polymerizable unsaturated compound (B) has a weight average molecular weight of 200 to 4,000.

  Item 7. The film forming method according to any one of Items 1 to 6, wherein the isocyanate group-containing polymerizable unsaturated compound (B) is a compound having two or more isocyanate groups in the molecule.

  Item 8, The composition (1) further contains a polyisocyanate compound which may be blocked other than the isocyanate group-containing polymerizable unsaturated compound (B), 2. The method for forming a film according to item 1.

  Item 9. A coated article in which a film is formed on the substrate by the method for forming a film according to any one of items 1 to 8.

  The film forming method of the present invention is formed using a resin (A) having an isocyanate-reactive group and a photopolymerization start part and a composition (1) containing an isocyanate group-containing polymerizable unsaturated compound (B). A functional layer is formed on the undercoat coating layer having a polymerizable unsaturated group and a photopolymerization initiating portion by using the composition (2) containing the functional unsaturated group-containing polymerizable unsaturated compound, and active. Photopolymerization of the resin (A) having a polymerizable unsaturated group of the functionalized group-containing polymerizable unsaturated compound, an isocyanate-reactive group in the undercoat coating layer, and a photopolymerization initiation portion by irradiation with energy rays The initiator and the polymerizable unsaturated group of the isocyanate group-containing polymerizable unsaturated compound (B) react with each other, and the functional layer is firmly bonded to the undercoat coating layer. For this reason, the coating film forming method of the present invention makes it possible to modify the surface of the substrate with excellent functionality maintenance. Functionality can be imparted by easily modifying the surface of the base material by selecting and applying a functionalizing group-containing polymerizable unsaturated compound having a functionality-imparting group according to the desired functionality. It is possible to achieve the effect that the functionality can be imparted.

  Furthermore, in the film forming method of the present invention, an isocyanate reactive group in the resin (A) having an isocyanate reactive group and a photopolymerization initiation part, and an isocyanate group in the isocyanate group-containing polymerizable unsaturated compound (B) Reacts to form a strong undercoat film layer, so that the ingress of adhesiveness-decreasing factors such as water is suppressed, and the substrate surface is modified with excellent functionality maintenance and water adhesion resistance. It becomes possible to carry out simply.

  In addition, the resin (A) having the isocyanate-reactive group and the photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B) react at a relatively low temperature to form a strong undercoat coating layer. The film forming method of the present invention can be particularly preferably used when the substrate is a substrate that is easily thermally deformed, such as plastic.

  Hereinafter, the method for forming a coating film on a substrate of the present invention will be described in more detail.

The film forming method of the present invention (hereinafter sometimes abbreviated as “the present method”)
On the substrate
Step (1): Using the composition (1) containing the resin (A) having an isocyanate-reactive group and a photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B), an undercoat coating layer is formed. Forming step,
Step (2): Functionality is imparted using the composition (2) containing a functionally-imparting group-containing polymerizable unsaturated compound on the substrate on which the undercoat coating layer has been formed in the step (1). A step of forming a layer, and a step (3): a step of irradiating active energy rays on the substrate on which the undercoat coating layer and the functional layer have been formed by the steps (1) and (2). This is performed sequentially.

Substrate In the present invention, the substrate is a target for modifying the surface and imparting functionality. There is no restriction | limiting in particular as a base material, Any of an organic material, an inorganic material, or a hybrid material of organic and inorganic may be sufficient. The substrate in the present invention is preferably a substrate containing an organic polymer compound such as an organic material or an organic / inorganic hybrid material.

  Examples of the organic material constituting the base material include acrylic resins such as polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene-1,2-diphenoxyethane-4, 4 ′. -Polyester resins such as dicarboxylate and polybutylene terephthalate, and epoxy resins represented by commercial products such as Epicoat (trade name: manufactured by Yuka Shell Epoxy Co., Ltd.), polycarbonate resin, polyimide resin, novolac resin, phenol Resin, acrylonitrile-butadiene-styrene (ABS) resin, vinylidene chloride resin, polyurethane resin, cellulose ester (eg, triacetyl cellulose, diacetyl cellulose, propionyl cellulose, butyryl cell) , Acetylpropionylcellulose, nitrocellulose), polyamide, polystyrene (eg, syndiotactic polystyrene), polyolefin (eg, polypropylene, polyethylene, polymethylpentene), polysulfone, polyethersulfone, polyarylate, polyetherimide, poly Examples thereof include ether ketone and various fiber-reinforced plastic materials (Fiber Reinforced Plastics: hereinafter referred to as FRP material or simply FRP).

  Various types of FRP are known and mainly refer to materials whose strength is improved by including reinforcing fibers in plastic (matrix resin). As the matrix resin, an unsaturated polyester resin, an epoxy resin, a phenol resin, an acrylic resin, or the like can be used. As the reinforcing fiber, glass fiber, aramid fiber, carbon fiber, cellulose fiber and the like can be used alone or in combination of two or more. As a molding method of FRP, a known method can be used. A sheet molding compound (SMC) molding method, a resin infusion (RIMP) molding method, a prepreg / autoclave press method, and a spray-up method, which are manufactured using a mold. / RTM (Resin Transfer Molding) molding method and the like.

  Examples of the inorganic material include metal materials such as iron, aluminum, brass, copper, tinplate, stainless steel, galvanized steel, zinc alloy (Zn-Al, Zn-Ni, Zn-Fe, etc.) plated steel; glass; Cement; concrete and the like.

  The thickness of the substrate is selected according to the purpose of use and is not particularly limited, but is generally about 10 μm to 10 cm.

  The substrate is further coated on the surface (one surface of the substrate or two or more surfaces (for example, the surface, the back surface, or two or more surfaces selected from one or more side surfaces if present)), a coating film, a gel coat A layer or the like may be formed. In the present specification, the term “substrate” includes a coating film, a gel coat layer and the like formed on the surface of the substrate.

  When the coating film is formed on the surface of the substrate, the coating film may be a single layer or a multilayer of two or more layers. The coating film may be a cured coating film or an uncured coating film. In the present invention, the cured coating film is a cured and dried state specified in JIS K 5600-1-1, that is, the center of the coating surface is strongly sandwiched between the thumb and the index finger, and the coating surface is free from dents due to fingerprints. In the coating film, the movement of the coating film is not felt, and the center of the coating surface is rubbed rapidly with the fingertip so that no trace is left on the coating surface. On the other hand, an uncured coating film is a state in which the coating film has not reached the above-mentioned cured and dried state, and includes a finger-touch dried state and a semi-cured dried state defined in JIS K 5600-1-1.

  The coating film formed on the substrate is, for example, a coating formed by a known thermosetting coating composition, an active energy ray curable coating composition, an active energy ray and a thermosetting coating composition, or the like. It can be a membrane.

  Examples of the thermosetting coating composition include coating compositions in the form of organic solvent type, aqueous type, powder type and the like containing a base resin having a crosslinkable functional group and a crosslinking agent. Examples of the crosslinkable functional group possessed by the base resin include a carboxyl group, a hydroxyl group, an epoxy group, and a silanol group. Examples of the base resin include acrylic resin, polyester resin, alkyd resin, and urethane resin. , Epoxy resin, fluorine resin, and the like. Examples of the crosslinking agent include polyisocyanate compounds, blocked polyisocyanate compounds, melamine resins, urea resins, carboxyl group-containing compounds, carboxyl group-containing resins, epoxy group-containing resins, and epoxy group-containing compounds. Among these, a coating film obtained from a paint containing a hydroxyl group-containing resin and a crosslinking agent, or a paint containing an acid group-containing resin and an epoxy group-containing resin is preferred, and a coating obtained from a paint containing a hydroxyl group-containing resin and a crosslinking agent is preferred. A film is more preferable, and a coating film obtained from a paint containing a hydroxyl group-containing resin and a polyisocyanate compound which may be blocked is more particularly preferable.

  The gel coat is used for smoothing irregularities on the surface of a substrate, improving design properties, blocking ultraviolet rays, and the like. Examples of the resin for forming the gel coat (gel coat resin) include unsaturated polyester resins, phenol resins, acrylic resins, epoxy resins, nitrified cotton (nitrocellulose) resins, or appropriate additions of pigments, dyes, and release resins. What mixed the mold etc. can be used conveniently.

  As a specific example of the base material on which the gel coat layer is formed, FRP in which the gel coat layer is formed is exemplified. The method for applying the gel coat layer is not particularly limited, and examples thereof include known methods such as a method for producing an integral molded body by a hand lay-up method, a spray-up method, and an in-mold coating method (in-mold coating method). . Specifically, a method in which a gel coat resin material that can be a surface of an outer plate is applied to the inner surface of a mold (for example, a mold) in advance, and then the FRP base material is laminated and cured, Examples thereof include a method in which a gel coat resin material is applied and then cured.

  Moreover, the base material may be one in which the coating film is formed on the gel coat layer.

  The substrate preferably has a group having reactivity with an isocyanate group on the surface thereof. Examples of the group having reactivity with the isocyanate group include a hydroxyl group, a carboxyl group, and an amino group, and a hydroxyl group is particularly preferable.

  The base material having a hydroxyl group is, for example, a method of coating a coating material containing a hydroxyl group-containing resin on the base material; a hydroxyl group-containing resin and a polyisocyanate compound which may be blocked, the hydroxyl group of the hydroxyl group-containing resin being blocked. Obtained by, for example, a method of coating a coating containing a polyisocyanate compound containing an isocyanate group (including a blocked isocyanate group) in an equivalent ratio in excess (isocyanate group / hydroxyl group <1.0). Can do.

  Moreover, the base material which has a hydroxyl group applies the coating material containing the hydroxyl-containing resin and the polyisocyanate compound which may be blocked on a base material, and dries a coating film by the heating method with which a hydroxyl group remains. Can also be obtained. Specific examples of the heating method in which the hydroxyl group remains include a method of heating at a relatively low temperature and a method of heating for a relatively short time.

  The group having reactivity with the isocyanate group may be one type or two or more types.

  The group having reactivity with the isocyanate group may be originally contained in the substrate or may be generated by a separate treatment. Of course, it is not hindered that both the material originally possessed by the base material and the material produced by a separate process are mixed. In the case where a coating film, a gel coat layer or the like is formed on the surface of the base material, the group having reactivity with the isocyanate group is originally possessed by the coating film, the gel coat layer or the like, or the step (0) described later It may be generated by a separate process. Of course, it is not hindered that both the coating film, the gel coat layer, and the like originally exist and those generated by separate processing.

Process (0)
In the film formation method of the present invention, plasma treatment, corona discharge treatment, and active energy ray treatment are performed on the substrate to be subjected to surface modification and functionality before the essential step (1). Then, a treatment (physical treatment) by at least one physical method selected from flame treatment, polishing treatment, blast treatment and the like can be performed. These physical treatments can be performed in combination of two or more as required.

  In the film forming method of the present invention, performing the step (0) before the step (1) is a viewpoint of improving adhesion between the base material and the undercoat film layer described later, a viewpoint of improving the wettability of the base material, and the like. To preferred. These performance improvements are considered to be caused by the following points: (i) By performing the above physical treatment (particularly, plasma treatment, corona discharge treatment, active energy ray treatment, and flame treatment) on the base material, The surface of the substrate is activated, and the adhesion and / or wettability is improved. Specifically, for example, a functional group (hydroxyl group, carboxyl group, etc.) is generated. The functional group is preferably a group that is reactive with an isocyanate group and contributes to improving the wettability of the substrate surface. (Ii) By subjecting the base material to the above physical treatment (particularly polishing treatment or blasting treatment), the material that interferes with the undercoat coating layer is removed, and the wettability of the base material is improved.

  The main chain and side chain of the polymer layer on the surface in contact with the atmosphere are separated by surface treatment such as plasma treatment, corona discharge treatment, active energy ray treatment, and flame treatment, and the separated polymer surface layer is a radical. It is considered that other radical species (for example, oxygen radicals or ozone in the air) recombine with the main chain or side chain to form a hydroxyl group, a carbonyl group, or the like.

  The physical treatment in the step (0) is preferably a plasma treatment, a corona discharge treatment, a flame treatment, a polishing treatment, or a blast treatment from the viewpoint of productivity and ease of treatment.

  Moreover, in the film formation method of this invention, before the process (1) which is an essential process, it is a strong acid process, a strong alkali process, an oxidation with respect to the base material used as the object which modifies a surface and provides functionality. You may perform the process (chemical process) by chemical methods, such as an agent process. These chemical treatments can be performed in combination of two or more as required.

  In the film forming method of the present invention, the physical treatment and the chemical treatment may be used in combination.

Process (1)
In the step (1), a composition (1) containing a resin (A) having an isocyanate-reactive group and a photopolymerization start part and an isocyanate group-containing polymerizable unsaturated compound (B) is used on a substrate. Then, an undercoat coating film layer is formed. Prior to the step (1), when the physical treatment and / or the chemical treatment of the step (0) is performed, an undercoat film is formed on the substrate subjected to the physical treatment and / or chemical treatment. Form a layer.

  The undercoat coating layer formed in step (1) is formed as an intermediate layer between the functional layer and the base material formed in step (2), and as an adhesive layer between the base material and the functional layer. It is what is done.

  In the film forming method of the present invention, the isocyanate reactive group in the resin (A) having an isocyanate reactive group and a photopolymerization initiation part reacts with the isocyanate group in the isocyanate group-containing polymerizable unsaturated compound (B). In addition, since a strong undercoat coating film layer is formed, entry of factors such as water and the like is suppressed, and it is possible to easily perform modification with excellent sustainability on the substrate surface.

  In the film forming method of the present invention, the isocyanate group in the isocyanate group-containing polymerizable unsaturated compound (B) is a hydroxyl group or the like on the surface of the base material (a paint containing the hydroxyl group-containing resin and the crosslinking agent). By reacting with a functional group having reactivity with an isocyanate group in the coating film formed by reacting with a functional group having reactivity with an isocyanate group in the step (0)). The undercoat coating layer is bonded, and further, in the step (3) described later, the polymerizable unsaturated group in the isocyanate group-containing polymerizable unsaturated compound (B) is formed in the step (2) described later. By reacting with the polymerizable unsaturated group in the polymerizable unsaturated compound that is a constituent of the base coat layer, the undercoat coating layer and the functionality-imparting layer are combined, and as a result, the base material, the base coat layer and the functionality are combined. Integrated layer Rigidly coupled coating became it is presumed to be formed.

  Hereinafter, the composition (1) will be described.

Resin (A) having isocyanate-reactive group and photopolymerization initiation part
The resin (A) having an isocyanate-reactive group and a photopolymerization initiation part is a resin having at least one isocyanate-reactive group and at least one photopolymerization initiation part in one molecule.

  The isocyanate-reactive group is not particularly limited as long as it is a group reactive with an isocyanate group. As this isocyanate reactive group, a hydroxyl group, an amino group, a carboxyl group, a thiol group etc. are mentioned, for example, Among these, a hydroxyl group is preferable. Therefore, the resin (A) having the isocyanate-reactive group and the photopolymerization start part is preferably a hydroxyl group-containing resin (A1) having a photopolymerization start part.

  The hydroxyl group-containing resin (A1) having a photopolymerization initiation part is a resin having at least one hydroxyl group and at least one photopolymerization initiation part in one molecule. Examples of the hydroxyl group-containing resin (A1) having a photopolymerization initiation portion include resins such as acrylic resins, polyester resins, acrylic-modified polyester resins, polyether resins, polycarbonate resins, polyurethane resins, epoxy resins, and alkyd resins. These can be used alone or in combination of two or more. Moreover, the hydroxyl group-containing resin (A1) having the photopolymerization initiation part may have a polymerizable unsaturated group. Especially, it is preferable that hydroxyl-containing resin (A1) which has a photoinitiation part is a hydroxyl-containing acrylic resin which has a photoinitiation part from viewpoints of maintenance of functionality, hydrolysis resistance, etc.

  The hydroxyl group-containing acrylic resin having a photopolymerization initiation part is, for example, a hydroxyl group-containing polymerizable unsaturated monomer, a polymerizable unsaturated monomer having a photopolymerization initiation part, and other polymerizable compounds copolymerizable with these polymerizable unsaturated monomers. A mixture containing an unsaturated monomer can be produced by copolymerization by a method known per se, for example, a solution polymerization method in an organic solvent, an emulsion polymerization method in water, or the like.

  The hydroxyl group-containing polymerizable unsaturated monomer is a compound having at least one hydroxyl group and one polymerizable unsaturated bond in one molecule. Examples of the hydroxyl group-containing polymerizable unsaturated monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and the like. Monoesterified product of (meth) acrylic acid and C2-C8 dihydric alcohol; ε-caprolactone modified product of monoesterified product of (meth) acrylic acid and C2-C8 dihydric alcohol; N -Hydroxymethyl (meth) acrylamide; allyl alcohol, and (meth) acrylate having a polyoxyethylene chain whose molecular terminal is a hydroxyl group. However, in the present invention, the monomer having a hydroxyl group corresponding to the polymerizable unsaturated monomer having an ultraviolet absorbing functional group described later (xvii) is another polymerizable compound copolymerizable with the hydroxyl group-containing polymerizable unsaturated monomer. It should be defined as an unsaturated monomer and is excluded from hydroxyl-containing polymerizable unsaturated monomers. These can be used alone or in combination of two or more.

  The polymerizable unsaturated monomer having a photopolymerization initiation part is a compound having at least one photopolymerization initiation part and a polymerizable unsaturated bond in one molecule. Examples of the polymerizable unsaturated monomer having a photopolymerization initiator include a reaction product of a photopolymerization initiator having a hydroxyl group and an isocyanate group-containing polymerizable unsaturated monomer.

  The photopolymerization initiator having a hydroxyl group is a photopolymerization initiator having at least one hydroxyl group in one molecule. Examples of the photopolymerization initiator having a hydroxyl group include 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one (trade names: Irgacure 2959, BASF). 2-hydroxy-1- {4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] phenyl} -2-methyl-propan-1-one (trade name: Irgacure 127, BASF) Can be used.

  The isocyanate group-containing polymerizable unsaturated monomer is typically a compound having one isocyanate group and one radically polymerizable unsaturated group, for example, isocyanate methyl (meth) acrylate, isocyanate ethyl (meth) acrylate, Isocyanatopropyl (meth) acrylate, isocyanate octyl (meth) acrylate, p-methacryloxy-α, α′-dimethylbenzyl isocyanate, m-acryloxy-α, α′-dimethylbenzyl isocyanate, m- or p-isopropenyl-α, α′-dimethylbenzyl isocyanate and the like can be mentioned. Moreover, what made some isocyanate of a polyisocyanate compound react with a hydroxyl-containing polymerizable unsaturated compound is mentioned.

Examples of other polymerizable unsaturated monomers copolymerizable with the hydroxyl group-containing polymerizable unsaturated monomer and the polymerizable unsaturated monomer having a photopolymerization initiation part include the following monomers (i) to (xx). be able to. These polymerizable unsaturated monomers can be used alone or in combination of two or more.
(I) Alkyl or cycloalkyl (meth) acrylate: for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl ( (Meth) acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, tridecyl (meth) acrylate, lauryl ( (Meth) acrylate, stearyl (meth) acrylate, isostearyl (meth) acrylate, cyclohexyl (meth) acrylate, methylcyclohexyl (meth) acrylate, t-butylcyclohexyl (meth) a Acrylate, cyclododecyl (meth) acrylate, tricyclodecanyl (meth) acrylate, and the like.
(Ii) Polymerizable unsaturated monomer having an isobornyl group: isobornyl (meth) acrylate and the like.
(Iii) Polymerizable unsaturated monomer having an adamantyl group: adamantyl (meth) acrylate and the like.
(Iv) Polymerizable unsaturated monomer having a tricyclodecenyl group: tricyclodecenyl (meth) acrylate and the like.
(V) Aromatic ring-containing polymerizable unsaturated monomers: benzyl (meth) acrylate, styrene, α-methylstyrene, vinyltoluene and the like.
(Vi) Polymerizable unsaturated monomer having an alkoxysilyl group: vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, γ- (meth) acryloyloxypropyltrimethoxysilane, γ- (meth) Acryloyloxypropyltriethoxysilane and the like.
(Vii) Polymerizable unsaturated monomer having a fluorinated alkyl group: perfluoroalkyl (meth) acrylate such as perfluorobutylethyl (meth) acrylate and perfluorooctylethyl (meth) acrylate; fluoroolefin and the like.
(Viii) A polymerizable unsaturated monomer having a photopolymerizable functional group such as a maleimide group.
(Ix) Vinyl compound: N-vinyl pyrrolidone, ethylene, butadiene, chloroprene, vinyl propionate, vinyl acetate and the like.
(X) Carboxy group-containing polymerizable unsaturated monomer: (meth) acrylic acid, maleic acid, crotonic acid, β-carboxyethyl (meth) acrylate and the like.
(Xi) Nitrogen-containing polymerizable unsaturated monomer: (meth) acrylonitrile, (meth) acrylamide, N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethylamino Propyl (meth) acrylamide, methylene bis (meth) acrylamide, ethylene bis (meth) acrylamide, an adduct of glycidyl (meth) acrylate and an amine compound, and the like.
(Xii) Polymerizable unsaturated monomer having two or more polymerizable unsaturated groups in one molecule: allyl (meth) acrylate, ethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, neo Pentyl glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and the like.
(Xiii) Epoxy group-containing polymerizable unsaturated monomer: glycidyl (meth) acrylate, β-methylglycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 3,4-epoxycyclohexylethyl (meth) acrylate 3,4-epoxycyclohexylpropyl (meth) acrylate, allyl glycidyl ether and the like.
(Xiv) (meth) acrylate having a polyoxyethylene chain whose molecular end is an alkoxy group.
(Xv) polymerizable unsaturated monomer having a sulfonic acid group: 2-acrylamido-2-methylpropanesulfonic acid, 2-sulfoethyl (meth) acrylate, allylsulfonic acid, 4-styrenesulfonic acid, etc .; sodium salt of these sulfonic acids And ammonium salts.
(Xvi) Polymerizable unsaturated monomer having a phosphate group: acid phosphooxyethyl (meth) acrylate, acid phosphooxypropyl (meth) acrylate, acid phosphooxypoly (oxyethylene) glycol (meth) acrylate, acid phosphooxypoly (Oxypropylene) glycol (meth) acrylate and the like.
(Xvii) polymerizable unsaturated monomer having an ultraviolet-absorbing functional group: 2-hydroxy-4 (3-methacryloyloxy-2-hydroxypropoxy) benzophenone, 2-hydroxy-4- (3-acryloyloxy-2-hydroxypropoxy) ) Benzophenone, 2,2′-dihydroxy-4- (3-methacryloyloxy-2-hydroxypropoxy) benzophenone, 2,2′-dihydroxy-4- (3-acryloyloxy-2-hydroxypropoxy) benzophenone, 2- ( 2'-hydroxy-5'-methacryloyloxyethylphenyl) -2H-benzotriazole and the like.
(Xviii) Light-stable polymerizable unsaturated monomer: 4- (meth) acryloyloxy 1,2,2,6,6-pentamethylpiperidine, 4- (meth) acryloyloxy-2,2,6,6-tetra Methylpiperidine, 4-cyano-4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine, 1- (meth) acryloyl-4- (meth) acryloylamino-2,2,6,6- Tetramethylpiperidine, 1- (meth) acryloyl-4-cyano-4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine, 4-crotonoyloxy-2,2,6,6-tetra Methylpiperidine, 4-crotonoylamino-2,2,6,6-tetramethylpiperidine, 1-crotonoyl-4-crotonoyloxy-2,2,6,6 -Tetramethylpiperidine and the like.
(Xix) polymerizable unsaturated monomer having a carbonyl group: acrolein, diacetone acrylamide, diacetone methacrylamide, acetoacetoxyethyl methacrylate, formylstyrol, vinyl alkyl ketone having 4 to 7 carbon atoms (for example, vinyl methyl ketone) , Vinyl ethyl ketone, vinyl butyl ketone) and the like.
(Xx) Polymerizable unsaturated monomer having an acid anhydride group: maleic anhydride, itaconic anhydride, citraconic anhydride and the like.

  In the present specification, the polymerizable unsaturated group means an unsaturated group capable of radical polymerization. Examples of the polymerizable unsaturated group include acryloyl group, methacryloyl group, vinyl group, allyl group, propenyl group, isopropenyl group, maleimide group, vinyl ether group and the like.

  In the present specification, “(meth) acrylate” means acrylate or methacrylate. “(Meth) acrylic acid” means acrylic acid or methacrylic acid. “(Meth) acryloyl” means acryloyl or methacryloyl. “(Meth) acrylamide” means acrylamide or methacrylamide.

  Moreover, the hydroxyl group-containing acrylic resin having the photopolymerization initiation part is preferably a hydroxyl group-containing acrylic resin having a photopolymerization initiation part and a polymerizable unsaturated group from the viewpoint of maintaining the functionality.

  The hydroxyl group-containing acrylic resin having a photopolymerization initiation part and a polymerizable unsaturated group is, for example, 1) a method of adding an isocyanate group-containing polymerizable unsaturated compound to a hydroxyl group-containing acrylic resin having a photopolymerization initiation part, 2) Method of adding a carboxyl group-containing polymerizable unsaturated compound to an epoxy group-containing acrylic resin having a photopolymerization start part, 3) Adding an epoxy group-containing polymerizable unsaturated compound to a carboxyl group-containing acrylic resin having a photopolymerization start part It can obtain by the method of making it react.

  Among these, from the viewpoint of maintaining functionality, the hydroxyl group-containing acrylic resin having the photopolymerization initiation part and the polymerizable unsaturated group is obtained by the method 1) or 2), preferably 1). Preferably there is.

  In the methods 1) to 3), functional groups such as a hydroxyl group-containing acrylic resin having a photopolymerization start part, an epoxy group-containing acrylic resin having a photopolymerization start part, and a carboxyl group-containing acrylic resin having a photopolymerization start part. The addition reaction of the acrylic resin containing the radical polymerizable unsaturated compound such as an isocyanate group-containing polymerizable unsaturated compound, a carboxyl group-containing polymerizable unsaturated compound, and an epoxy group-containing polymerizable unsaturated compound is usually conducted in an organic solvent. 40 to 160 ° C., and if necessary, using a catalyst. Although the addition reaction can be performed by melting the functional group-containing acrylic resin, it is preferable to perform the reaction in an organic solvent for ease of production.

  Subsequently, the isocyanate group-containing polymerizable unsaturated compound, the carboxyl group-containing polymerizable unsaturated compound, and the epoxy group-containing polymerizable unsaturated compound used in the addition reaction will be described.

  Typical examples of the isocyanate group-containing polymerizable unsaturated compound (hereinafter sometimes referred to as an isocyanate group-containing polymerizable unsaturated monomer) include compounds each having one isocyanate group and one radically polymerizable unsaturated group. , For example, isocyanate methyl (meth) acrylate, isocyanate ethyl (meth) acrylate, isocyanate propyl (meth) acrylate, isocyanate octyl (meth) acrylate, p-methacryloxy-α, α′-dimethylbenzyl isocyanate, m-acryloxy-α, Examples include α′-dimethylbenzyl isocyanate, m- or p-isopropenyl-α, α′-dimethylbenzyl isocyanate. Moreover, what made some isocyanate of a polyisocyanate compound react with a hydroxyl-containing polymerizable unsaturated compound is mentioned.

  Examples of carboxyl group-containing polymerizable unsaturated compounds (hereinafter sometimes referred to as carboxyl group-containing polymerizable unsaturated monomers) include monocarboxylic acids such as (meth) acrylic acid, crotonic acid, and isocrotonic acid, and maleic acid. , Fumaric acid, itaconic acid, citraconic acid, α, β-unsaturated dicarboxylic acids such as chlorinated maleic acid or half esters thereof.

  The epoxy group-containing polymerizable unsaturated compound (hereinafter sometimes referred to as an epoxy group-containing polymerizable unsaturated monomer) is typically a compound having one epoxy group and one radically polymerizable unsaturated group in one molecule. For example, epoxy group-containing monomer compounds such as glycidyl (meth) acrylate, β-methylglycidyl (meth) acrylate, glycidyl vinyl ether, allyl glycidyl ether; (meth) acrylic acid (2-oxo-1 , 3-oxolane) methyl-containing vinyl monomer compounds such as methyl; (meth) acrylic acid 3,4-epoxycyclohexyl, (meth) acrylic acid 3,4-epoxycyclohexyl Alicyclic epoxy group-containing vinyl monomers such as methyl and 3,4-epoxycyclohexylethyl (meth) acrylate And the like.

  Next, photopolymerization of a hydroxyl group-containing acrylic resin having a photopolymerization start part in the methods 1) to 3), an epoxy group-containing acrylic resin having a photopolymerization start part, a carboxyl group-containing acrylic resin having a photopolymerization start part, and the like. The functional group-containing acrylic resin having a start part will be described.

  Various methods can be applied to prepare the functional group-containing acrylic resin having the photopolymerization initiation part. For example, a hydroxyl group-containing polymerizable unsaturated monomer, an epoxy group-containing polymerizable unsaturated monomer, and a carboxyl group-containing polymerizable monomer can be used. A polymerizable unsaturated monomer selected to obtain a desired functional group-containing acrylic resin from among saturated monomers, a polymerizable unsaturated monomer having the photopolymerization initiation portion, and other polymerizable unsaturated monomers as necessary. A method of copolymerizing a saturated monomer in an organic solvent is the simplest and preferable.

  The hydroxyl group-containing polymerizable unsaturated monomer is typically a compound having one hydroxyl group and one radically polymerizable unsaturated group, such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth). Monoesterified product of (meth) acrylic acid such as acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate and a dihydric alcohol having 2 to 8 carbon atoms; the (meth) acrylic acid and carbon Ε-caprolactone modified product of monoesterified product with dihydric alcohol of 2 to 8; N-hydroxymethyl (meth) acrylamide; allyl alcohol, and (meth) acrylate having polyoxyethylene chain whose molecular terminal is hydroxyl group Etc.

  Moreover, as the carboxyl group-containing polymerizable unsaturated monomer and the epoxy group-containing polymerizable unsaturated monomer, the above-mentioned monomers can be used.

  In preparing the hydroxyl group-containing acrylic resin, a carboxyl group-containing polymerizable unsaturated monomer, an epoxy group-containing polymerizable unsaturated monomer, and an isocyanate group-containing polymerizable unsaturated monomer are used in preparing the epoxy group-containing acrylic resin. In preparing a carboxyl group-containing acrylic resin, a group-containing polymerizable unsaturated monomer, an isocyanate group-containing polymerizable unsaturated monomer, and a hydroxyl group-containing polymerizable unsaturated monomer are epoxy group-containing polymerizable unsaturated monomers, isocyanate group-containing polymerizable monomers. Both unsaturated monomers and hydroxyl group-containing polymerizable unsaturated monomers are treated as other polymerizable unsaturated monomers.

Examples of the other polymerizable unsaturated monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, and isobutyl (meth) ) Acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethyl (Meth) acrylic acid alkyl esters such as octyl (meth) acrylate, dodecyl (meth) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate;
Alkyl carbitol (meth) acrylates such as benzyl (meth) acrylate, phenyl (meth) acrylate, phenoxyethyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, ethyl carbitol (meth) acrylate;
Other (meth) acrylic acid esters such as isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate;
hydrolyzable silyl group-containing polymerizable unsaturated monomers such as γ- (meth) acryloyloxypropyltrimethoxysilane, γ- (meth) acryloyloxypropyltriethoxysilane, γ- (meth) acryloyloxypropylmethyldimethoxysilane;
Fluorine-containing α-olefin compounds such as vinyl fluoride, vinylidene fluoride, trifluoroethylene, tetrafluoroethylene, chlorotrifluoroethylene, bromotrifluoroethylene, pentafluoropropylene, hexafluoropropylene;
Perfluoroalkyl / perfluorovinyl ether such as trifluoromethyl trifluorovinyl ether, pentafluoroethyl trifluorovinyl ether, heptafluoropropyl trifluorovinyl ether or (per) fluoroalkyl vinyl ether (wherein the alkyl group has 1 to 18 carbon atoms) )) Fluorine-containing vinyl polymerizable unsaturated monomers such as
Mono- or diester compounds of various polyvalent carboxyl group-containing polymerizable unsaturated monomers represented by fumaric acid, maleic acid, itaconic acid, etc., and monoalkyl alcohols having 1 to 18 carbon atoms; styrene, Aromatic vinyl compounds such as vinyltoluene, α-methylstyrene, p-tert-butylstyrene;
(Meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, Nn-propyl (meth) acrylamide, N-iso-propyl (meth) acrylamide, Nn-butyl (meth) acrylamide N-iso-butyl (meth) acrylamide, N-tert-butyl (meth) acrylamide, N-amyl (meth) acrylamide, N- (meth) acrylamide, N-hexyl (meth) acrylamide, N-heptyl (meth) Acrylamide, N-2-ethylhexyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N -Ethoxymethyl (meth) Kurylamide, Nn-propoxymethyl (meth) acrylamide, N-iso-propoxymethyl (meth) acrylamide, Nn-butoxymethyl (meth) acrylamide, N-iso-butoxymethyl (meth) acrylamide, N-tert- Butoxymethyl (meth) acrylamide, N-amyloxymethyl acrylamide, N-hexyloxy (meth) acrylamide, N-heptyloxymethyl (meth) acrylamide, N-octyloxymethyl (meth) acrylamide, N-2-ethyl-hex Amino group-containing amide polymerizable unsaturated monomers such as siloxymethyl (meth) acrylamide and diacetone (meth) acrylamide;
Dimethylaminoalkyl (meth) acrylate compounds such as dimethylaminoethyl (meth) acrylate and diethylaminoethyl (meth) acrylate; tert-butylaminoethyl (meth) acrylate, tert-butylaminopropyl (meth) acrylate, aziridinyl Ethyl (meth) acrylate, pyrrolidinylethyl (meth) acrylate, piperidinylethyl (meth) acrylate, (meth) acryloylmorpholine, N-vinyl-2-pyrrolidone, N-vinylcaprolactam, N-vinyloxazoline, Nitrogen-containing polymerizable unsaturated monomers such as (meth) acrylonitrile;
Vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl caproate, vinyl caprylate, vinyl caprate, vinyl laurate, branched (branched) vinyl aliphatic carboxylate having 9 carbon atoms, carbon number 10 A branched (branched) aliphatic carboxylate, an aliphatic vinyl carboxylate such as a branched (branched) aliphatic carboxylate having 11 carbon atoms, and vinyl stearate;
Vinyl ester compounds of carboxylic acids having a cyclic structure such as vinyl cyclohexanecarboxylate, vinyl methylcyclohexanecarboxylate, vinyl benzoate, vinyl p-tert-butylbenzoate;
Alkyl vinyl ether compounds such as ethyl vinyl ether, hydroxyethyl vinyl ether, hydroxy n-butyl vinyl ether, hydroxyisobutyl vinyl ether, cyclohexyl vinyl ether, lauryl vinyl ether;
Halogenated olefin compounds other than the above-mentioned fluoroolefin compounds such as vinyl chloride and vinylidene chloride; α-olefin compounds such as ethylene, propylene, and butene-1.

  Various things can be used as a polymerization initiator and an organic solvent used for preparation of functional group containing acrylic resins, such as the said hydroxyl group containing acrylic resin, an epoxy group containing acrylic resin, and a carboxyl group containing acrylic resin.

  Examples of the polymerization initiator include 2,2′-azobisisobutyronitrile, 2,2′-azobis-methylbutyronitrile, 2,2′-azobis-2,4-dimethylvaleronitrile, 1'-azobis-cyclohexanecarbonitrile, dimethyl-2,2'-azobisisobutyrate, 4,4'-azobis-4-cyanovaleric acid, 2,2'-azobis- (2-amidinopropene) dihydrochloride Salt, 2-tert-butylazo-2-cyanopropane, 2,2′-azobis (2-methyl-propionamide) dihydrate, 2,2′-azobis [2- (2-imidazolin-2-yl) Propene], azo compounds such as 2,2′-azobis (2,2,4-trimethylpentane); benzoyl peroxide, methyl ethyl ketone peroxide, cumene hydroperoxy Id, potassium persulfate, tert-butylperoxyneodecanoate, tert-butylperoxypivalate, tert-butylperoxy-2-ethylhexanoate, tert-butylperoxyisobutyrate, 1,1- Bis-tert-butylperoxy-3,3,5-trimethylcyclohexane, tert-butylperoxy-laurate, tert-butylperoxyisophthalate, tert-butylperoxyacetate, tert-butylperoxybenzoate, dicumylper Ketone peroxide compounds such as oxide and di-tert-butyl peroxide; peroxyketal compounds; hydroperoxide compounds; dialkyl peroxide compounds; diacyl peroxide compounds; Ester compounds; peroxydicarbonate compounds; hydrogen peroxide, and the like.

  Examples of the organic solvent include alkyl alcohol solvents such as methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, n-pentanol, and isopentanol; methyl cellosolve , Ethyl cellosolve, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, and other glycol ether solvents; benzene, toluene, xylene , Aromatic hydrocarbon solvents such as ethylbenzene; Exon Aromatic Naphtha No. Mixed hydrocarbon solvent containing aromatic hydrocarbon such as 2 (manufactured by Exxon USA); aliphatic hydrocarbon solvent such as n-pentane, n-hexane and n-octane; Isopar C, Isopar E, Exol DSP100 / 140, Exol D30 (all manufactured by Exxon USA), mixed solvent containing aliphatic hydrocarbon such as IP Solvent 1016 (Idemitsu Petrochemical Co., Ltd.); cyclopentane, cyclohexane, methylcyclohexane, ethylcyclohexane, etc. Alicyclic hydrocarbon solvents such as: tetrahydrofuran, dioxane, diisopropyl ether, di-n-butyl ether and other ether solvents; acetone, methyl ethyl ketone, methyl isobutyl ketone and other ketone solvents; methyl acetate, ethyl acetate, n-propyl acetate , Isopropyl acetate, n acetate Butyl, isobutyl acetate, n- amyl, isoamyl acetate, hexyl acetate, ethyl propionate, and ester solvents such as butyl propionate. A small amount of water can be used in combination with these organic solvents.

  Furthermore, when preparing the functional group-containing acrylic resin having the photopolymerization initiation part, a chain transfer agent may be used as necessary. Examples of the chain transfer agent include dodecyl mercaptan, lauryl mercaptan, thioglycolic acid ester, mercaptoethanol, α-methylstyrene dimer, and the like.

  The hydroxyl value of the hydroxyl group-containing resin (A1) having the photopolymerization initiation part is from 15 to 240 mgKOH / g, preferably from 30 to 220 mgKOH / g, more preferably from 50 to 50, from the viewpoint of maintaining the functionality and water resistance. It is preferable to be within the range of 200 mg KOH / g.

  In addition, the weight average molecular weight of the resin (A) having an isocyanate-reactive group and a photopolymerization initiation part is 3,000 or more, preferably 3,000 to 100, from the viewpoints of maintenance of functionality, coating film appearance, and the like. 000, more preferably 4,000 to 80,000, and still more preferably 5,000 to 50,000.

  In this specification, the number average molecular weight and the weight average molecular weight are the retention time (retention capacity) measured using a gel permeation chromatograph (GPC) and the retention time of a standard polystyrene with a known molecular weight measured under the same conditions. (Retention capacity) is a value obtained by converting to the molecular weight of polystyrene. Specifically, “HLC-8120GPC” (trade name, manufactured by Tosoh Corporation) is used as a gel permeation chromatograph, and “TSKgel G4000HXL”, “TSKgel G3000HXL”, “TSKgel G2500HXL” and “TSKgel” are used as columns. G2000HXL "(trade name, all manufactured by Tosoh Corporation), using a differential refractometer as the detector, mobile phase: tetrahydrofuran, measurement temperature: 40 ° C, flow rate: 1 mL / min Can be measured below.

  In addition, when the resin (A) having an isocyanate-reactive group and a photopolymerization start part has a polymerizable unsaturated group, the unsaturated group equivalent of the resin (A) having the isocyanate-reactive group and the photopolymerization start part is: From the viewpoint of maintaining the functionality, etc., it is suitable to be in the range of 250 to 5,000, preferably 300 to 4,000, more preferably 400 to 3,500.

  Here, in this specification, an unsaturated group equivalent means the molar mass per unsaturated group. When the molecular weight of the compound is M and the number of unsaturated groups contained in one molecule of the compound is σ, the unsaturated group equivalent is a value represented by M / σ.

  Moreover, in this specification, an unsaturated group equivalent can be calculated | required by adding dodecyl mercaptan to an unsaturated group and carrying out back titration of the remaining dodecyl mercaptan with an iodine solution.

  In the composition (1) according to the present invention, the content of the resin (A) having an isocyanate-reactive group and a photopolymerization start part is the same as that of the composition (1) from the viewpoint of maintaining functionality, water resistance, and the like. It is suitable that it is in the range of 20 to 90% by mass, preferably 30 to 85% by mass, more preferably 40 to 80% by mass, based on the total solid content.

  In the present specification, the “solid content” means non-volatile components such as a resin, a curing agent and a pigment contained in the composition remaining after drying at 110 ° C. for 1 hour. For example, the total solid content of the composition (1) is measured at 110 ° C. for 1 hour after the composition (1) is weighed in a heat-resistant container such as an aluminum foil cup and the composition (1) is spread on the bottom of the container. Calculate by calculating the ratio of the mass of the component remaining after drying to the total mass of the composition (1) before drying by weighing the mass of the component in the composition (1) remaining after drying. be able to.

Isocyanate group-containing polymerizable unsaturated compound (B)
The isocyanate group-containing polymerizable unsaturated compound (B) is a compound having one or more isocyanate groups and one or more polymerizable unsaturated groups in the molecule.

  The polymerizable unsaturated group is an unsaturated group capable of radical polymerization, and specifically includes, for example, an acryloyl group, a methacryloyl group, a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a maleimide group, and a vinyl ether group. Can be mentioned.

  Of these polymerizable unsaturated groups, an acryloyl group and a methacryloyl group are preferable, and an acryloyl group is particularly preferable from the viewpoint of excellent reactivity.

  The isocyanate group-containing polymerizable unsaturated compound (B) can be obtained, for example, by reacting a part of the isocyanate group of the polyisocyanate compound with a hydroxyl group-containing polymerizable unsaturated compound.

  Examples of the isocyanate group-containing polymerizable unsaturated compound (B) (hereinafter sometimes referred to as “isocyanate group-containing polymerizable unsaturated monomer”) include the following compounds.

  Examples of the compound having one isocyanate group and one polymerizable unsaturated group include isocyanate methyl (meth) acrylate, isocyanate ethyl (meth) acrylate, isocyanate propyl (meth) acrylate, isocyanate butyl (meth) acrylate, and isocyanate octyl. (Meth) acrylate, m- or p-isopropenyl having an isocyanate alkyl group such as (meth) acrylate, p-methacryloxy-α, α′-dimethylbenzyl isocyanate, m-acryloxy-α, α′-dimethylbenzyl isocyanate, etc. -Α, α'-dimethylbenzyl isocyanate, 2-methacryloyloxyethyl isocyanate, 2-acryloyloxyethyl isocyanate, hydroxyalkyl (meth) acrylate Reaction product of 1 mol of diisocyanate compound, specifically, for example, a compound having two isocyanate groups (different in reactivity) such as isophorone diisocyanate, 2-hydroxyethyl (meth) acrylate, (meth) acrylic Examples thereof include compounds obtained by an equimolar addition reaction with a hydroxyl group-containing polymerizable unsaturated monomer such as 4-hydroxybutyl acid.

  The compound having two or more isocyanate groups or polymerizable unsaturated groups is obtained, for example, by reacting a part of the isocyanate group of a polyisocyanate compound having three or more isocyanate groups with a hydroxyl group-containing polymerizable unsaturated compound. Compound obtained by reacting a part of isocyanate groups of a polyisocyanate compound having two or more isocyanate groups with a hydroxyl group-containing polymerizable unsaturated compound having two or more polymerizable unsaturated groups; a carbodiimide group Compound obtained by reacting a part or all of the carbodiimide group of the containing isocyanate compound with a carboxyl group-containing polymerizable unsaturated compound; “Desmolux D100”, “Desmolux D200”, “Desmolux VP LS 23” manufactured by Ornex 96 "," Desmolux XP2510 "," Desmolux XP2765 ";" Laromer LR9000 "manufactured by BASF, etc. can be used.

  Specific examples of the compound obtained by reacting a part of the isocyanate group of the polyisocyanate compound having three or more isocyanate groups with a hydroxyl group-containing polymerizable unsaturated compound include, for example, hydroxyalkyl (meth) acrylate. And a reaction product of a hydroxyl group-containing (meth) acrylate such as a polyisocyanate compound having three or more isocyanate groups or an isocyanate group-terminated urethane prepolymer.

  More specifically, for example, a reaction product of 1 mol of hydroxyalkyl (meth) acrylate and 1 mol of triisocyanate compound, a reaction product of 2 mol of hydroxyalkyl (meth) acrylate and 1 mol of triisocyanate compound, etc. be able to.

  The hydroxyl group-containing polymerizable unsaturated compound is a compound having at least one hydroxyl group and one polymerizable unsaturated group in one molecule, specifically, for example, 2-hydroxyethyl (meth) acrylate, 2 A monoesterified product of (meth) acrylic acid such as hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate and a dihydric alcohol having 2 to 8 carbon atoms; Ε-caprolactone modified product of monoesterified product of (meth) acrylic acid and dihydric alcohol having 2 to 8 carbon atoms; N-hydroxymethyl (meth) acrylamide; allyl alcohol, and polyoxyethylene chain whose molecular terminal is hydroxyl group (Meth) acrylate having glycerin di (meth) acrylate, trimethylo And tri (meth) such as pentaerythritol tri (meth) acrylate acrylate compounds; propanedioic (meth) acrylate, di (meth) acrylate compounds such as pentaerythritol di (meth) acrylate.

  The polyisocyanate compound is a compound having two or more isocyanate groups in one molecule, and specifically, aliphatic polyisocyanates such as hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, dimer acid diisocyanate, and lysine diisocyanate. Compounds and burette type adducts, isocyanurate cycloadducts, allophanate adducts of these polyisocyanates; isophorone diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), methylcyclohexane-2,4-diisocyanate, methylcyclohexane-2 , 6-diisocyanate, 1,3-di (isocyanatomethyl) cyclohexane, 1,4-di (isocyanatomethyl) cyclohexane, 1,4-cyclohe Alicyclic diisocyanate compounds such as san diisocyanate, 1,3-cyclopentane diisocyanate, 1,2-cyclohexane diisocyanate, and burette type adducts, isocyanurate ring adducts, allophanate adducts of these polyisocyanates; xylylene diisocyanate, Metaxylylene diisocyanate, tetramethylxylylene diisocyanate, tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, 1,4-naphthalene diisocyanate, 4,4'-toluidine diisocyanate, 4,4'- Diphenyl ether diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4'-biphenylene diisocyanate , 3,3′-dimethyl-4,4′-biphenylene diisocyanate, bis (4-isocyanatophenyl) sulfone, isopropylidenebis (4-phenylisocyanate), and burette types of these polyisocyanates Adduct, isocyanurate cycloadduct; triphenylmethane-4,4 ′, 4 ″ -triisocyanate, 1,3,5-triisocyanatobenzene, 2,4,6-triisocyanatotoluene, 4,4 ′ -Polyisocyanate compounds having three or more isocyanate groups in one molecule such as dimethyldiphenylmethane-2,2 ', 5,5'-tetraisocyanate, and burette type adducts and isocyanurate ring adducts of these polyisocyanates Ethylene glycol and propylene glycol Recall, 1,4-butylene glycol, neopentyl glycol, hexylene glycol, dimethylol propionic acid, polyalkylene glycol, trimethylol propane, hexane triol, glycerin, pentaerythritol and other isocyanate groups in excess of the hydroxyl group Examples thereof include urethanated adducts obtained by reacting polyisocyanate compounds in proportions, burette-type adducts of these polyisocyanates, isocyanurate ring adducts, and the like.

  These can be used alone or in combination of two or more.

  As a compound obtained by reacting a part of the isocyanate group of the polyisocyanate compound with a hydroxyl group-containing polymerizable unsaturated compound, from the viewpoint of raw material costs and the like, isocyanurate cycloadduct of hexamethylene diisocyanate and hydroxyl group-containing polymerizability A compound obtained by reacting with an unsaturated compound can be preferably used.

  The reaction of the polyisocyanate compound and the hydroxyl group-containing polymerizable unsaturated compound can be carried out by a known method for reacting the polyisocyanate compound and the hydroxyl group-containing compound.

  The above reaction can usually be carried out in an organic solution. Examples of organic solvents include aromatic hydrocarbon solvents such as toluene and xylene, ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone, and ester solvents such as ethyl acetate, propyl acetate, isobutyl acetate, and butyl acetate. Can be mentioned. These can be used alone or in combination of two or more.

  The reaction temperature is usually from room temperature to about 100 ° C., and the reaction time is about 1 to 10 hours.

  In the above reaction, a catalyst such as dibutyltin dilaurate, dibutyltin diethylhexoate or dibutyltin sulfite can be used as necessary. The amount of the catalyst is preferably 0.01 to 1% by mass, particularly 0.1 to 0.5% by mass, based on the total amount of the reaction raw materials.

  Moreover, polymerization inhibitors, such as hydroquinone monomethyl ether, can also be used as needed. The amount of the polymerization inhibitor is preferably 0.01 to 1% by mass with respect to the total amount of the reaction raw materials.

  Since the isocyanate group-containing polymerizable unsaturated compound (B) has an isocyanate group, the mixing ratio in the reaction of the hydroxyl group-containing polymerizable unsaturated compound and the polyisocyanate compound is usually such that the isocyanate group of the polyisocyanate compound contains a hydroxyl group. The mixing ratio is an excess (isocyanate group / hydroxyl group> 1.0) with respect to the hydroxyl group of the unsaturated compound. By adjusting the mixing ratio, the isocyanate group concentration (isocyanate equivalent) of the isocyanate group-containing polymerizable unsaturated compound (B) can be adjusted.

  The isocyanate equivalent of the isocyanate group-containing polymerizable unsaturated compound (B) is 90 to 1,500, preferably 100 to 900, more preferably from the viewpoints of adhesion to the substrate, maintenance of functionality, water resistance, and the like. Is preferably in the range of 150 to 450.

  Here, in this specification, an isocyanate equivalent is the molar mass per isocyanate group. When the molecular weight of the isocyanate group-containing polymerizable unsaturated compound (B) is M and the number of isocyanate groups contained in one molecule of the compound is ν, the isocyanate equivalent is a value represented by M / ν.

  Moreover, in this specification, an isocyanate equivalent is an isocyanate equivalent calculated | required by back titration using a dibutylamine. The reverse titration can be performed by adding an excess of dibutylamine to the sample and reacting, and titrating the remaining dibutylamine with an aqueous hydrochloric acid solution using bromophenol blue as a titration indicator.

  The unsaturated group equivalent of the isocyanate group-containing polymerizable unsaturated compound (B) is from 90 to 2,500, preferably from 100 to 2,000, more preferably from the viewpoint of improving adhesion with the functional layer. It is preferable to be within the range of ˜1,500.

  The molecular weight of the isocyanate group-containing polymerizable unsaturated compound (B) has a weight average molecular weight of 200 to 4,000, particularly 400 to 2,500, more particularly 500 to 1, from the viewpoint of improving the strength of the undercoat coating layer. 500 is preferable.

  In addition, as the isocyanate group-containing polymerizable unsaturated compound (B), a compound having two or more isocyanate groups in the molecule can be suitably used from the viewpoint of improving adhesion to the functional layer.

  The isocyanate group-containing polymerizable unsaturated compound (B) can be used alone or in combination of two or more.

  The composition (1) comprises the resin (A) having the isocyanate-reactive group and the photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B) as essential components.

The blending ratio of the isocyanate-reactive group and the resin (A) having a photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B) is from the viewpoint of the maintenance of functionality and the performance of the resulting coating film, It is preferable to be within the following range based on 100 parts by mass of the total solid content of the resin (A) having an isocyanate-reactive group and a photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B).
Resin (A) having an isocyanate-reactive group and a photopolymerization initiation part: 20 to 95 parts by mass, preferably 35 to 90 parts by mass, more preferably 50 to 85 parts by mass,
Isocyanate group-containing polymerizable unsaturated compound (B): 5 to 80 parts by mass, preferably 10 to 65 parts by mass, more preferably 15 to 50 parts by mass.

  The composition (1) can further contain an optionally blocked polyisocyanate compound other than the isocyanate group-containing polymerizable unsaturated compound (B). Examples of the polyisocyanate compound which may be blocked include a polyisocyanate compound having no polymerizable unsaturated group and a blocked polyisocyanate compound having no polymerizable unsaturated group.

  Examples of the polyisocyanate compound having no polymerizable unsaturated group include aliphatic polyisocyanates such as hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, dimer acid diisocyanate, and lysine diisocyanate; burettes of these aliphatic polyisocyanates Type adduct, isocyanurate ring adduct, allophanate type adduct, uretdione type adduct; isophorone diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), methylcyclohexane-2,4- or -2,6-diisocyanate, etc. Alicyclic diisocyanates; burette type adducts, isocyanurate cycloadducts of these alicyclic diisocyanates; xylylene diisocyanate, tetra Aromatic diisocyanate compounds such as tilxylylene diisocyanate, tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate (MDI), 1,5-naphthalene diisocyanate, 1,4-naphthalene diisocyanate; burette type addition of these aromatic diisocyanates Products, isocyanurate cycloadducts; hydrogenated MDI and derivatives of hydrogenated MDI; of polyols such as ethylene glycol, propylene glycol, 1,4-butylene glycol, dimethylolpropionic acid, polyalkylene glycol, trimethylolpropane, hexanetriol Urethane adducts obtained by reacting a polyisocyanate compound with a ratio of an excess of isocyanate groups to hydroxyl groups; with burette type of these urethane adducts Object can include an isocyanurate ring adducts.

  In addition, as the blocked polyisocyanate compound having no polymerizable unsaturated group, those obtained by adding a blocking agent to the isocyanate group of the polyisocyanate compound can be used. The blocked polyisocyanate compound is stable at room temperature, but when heated to the baking temperature of the coating film (usually about 80 to about 200 ° C.), the blocking agent can be dissociated to regenerate free isocyanate groups. It is desirable to be. Examples of the blocking agent that satisfies such requirements include, for example, phenol, lactam, alcohol, ether, oxime, active methylene, mercaptan, acid amide, imide, amine, imidazole, and pyrazole. And the like blocking agents. Among these, a blocked polyisocyanate compound blocked with an active methylene-based or pyrazole-based blocking agent is preferable.

  The composition (1) contains the isocyanate-reactive group and the resin (A) having a photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B), and if necessary, the isocyanate group-containing polymerizable compound. When the polyisocyanate compound which may be blocked other than the unsaturated compound (B) is contained, the resin (A) having the isocyanate-reactive group and the photopolymerization initiation part, the isocyanate group-containing polymerizable unsaturated compound (B) In addition, the blending ratio of the polyisocyanate compound which may be blocked is such that the isocyanate group-containing polymerizable unsaturated compound (B) and the above-mentioned blocked are from the viewpoint of maintaining the functionality and performance of the resulting coating film. Total isocyanate groups of the polyisocyanate compound (including blocked isocyanate groups) and isocyanate The equivalent ratio (isocyanate group / isocyanate reactive group) to the isocyanate reactive group in the resin (A) having a reactive group and a photopolymerization initiation part is usually 0.5 to 2.0, particularly 0.8 to 1. It is suitable to use it in the ratio which becomes in the range of .5.

  In the composition (1), when the hydroxyl group-containing resin (A1) having a photopolymerization start part is used as the resin (A) having the isocyanate-reactive group and the photopolymerization start part, the photopolymerization start part is included. The blending ratio of the hydroxyl group-containing resin (A1), the isocyanate group-containing polymerizable unsaturated compound (B), and the optionally polyblocked polyisocyanate compound blended as required is the maintenance of functionality and the coating obtained. From the viewpoint of the performance of the film, the isocyanate group-containing polymerizable unsaturated compound (B) and the total isocyanate group (including the blocked isocyanate group) of the polyisocyanate compound which may be blocked, and the photopolymerization initiation part The equivalent ratio (NCO / OH) with the hydroxyl group in the hydroxyl group-containing resin (A1) is usually 0.5 to 2.0, particularly 0.8 to 1.5. It is preferred to use a ratio comprised within the range.

  The composition (1) can further contain a polymerizable unsaturated compound other than the isocyanate group-containing polymerizable unsaturated compound (B). Examples of the polymerizable unsaturated compound other than the isocyanate group-containing polymerizable unsaturated compound (B) include a monofunctional polymerizable unsaturated group-containing compound and a polyfunctional polymerizable unsaturated group-containing compound.

  Examples of the monofunctional polymerizable unsaturated group-containing compound include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl ( (Meth) acrylate, t-butyl (meth) acrylate, neopentyl (meth) acrylate, cyclohexyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, isobornyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate, Styrene, α-methylstyrene, vinyltoluene, α-chlorostyrene; 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate Monoesterified product of (meth) acrylic acid such as 4-hydroxybutyl (meth) acrylate and a dihydric alcohol having 2 to 8 carbon atoms; the (meth) acrylic acid and a dihydric alcohol having 2 to 8 carbon atoms; Ε-caprolactone modified product of a monoester product of: having one isocyanate group such as isocyanate methyl (meth) acrylate, isocyanate ethyl (meth) acrylate, isocyanate propyl (meth) acrylate and one polymerizable unsaturated group Compound: N-hydroxymethyl (meth) acrylamide; allyl alcohol; (meth) acrylate having a polyoxyethylene chain whose molecular terminal is a hydroxyl group.

  Examples of the polyfunctional polymerizable unsaturated group-containing compound include an esterified product of a polyhydric alcohol and (meth) acrylic acid, a compound having one isocyanate group and two or more polymerizable unsaturated groups. It is done. Specifically, for example, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1,3-butanediol di (meth) Acrylate, 1,4-butanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, bisphenol A ethylene Di (meth) acrylate compounds such as oxide-modified di (meth) acrylate and isocyanuric acid ethylene oxide-modified diacrylate; glycerin tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, tri Tri (meth) acrylate compounds such as tyrolpropane propylene oxide modified tri (meth) acrylate, trimethylolpropane ethylene oxide modified tri (meth) acrylate, ε-caprolactone modified tris (acryloxyethyl) isocyanurate, pentaerythritol triacrylate; penta Examples include tetra (meth) acrylate compounds such as erythritol tetra (meth) acrylate; and dipentaerythritol hexa (meth) acrylate.

  The polymerizable unsaturated compounds other than the isocyanate group-containing polymerizable unsaturated compound (B) can be used alone or in combination of two or more.

  The molecular weight of the polymerizable unsaturated compound other than the isocyanate group-containing polymerizable unsaturated compound (B) is less than 3,000, preferably 100 to 2,500, more preferably 150, from the viewpoint of maintaining functionality. It is suitable to be in the range of ˜2,000, even more preferably in the range of 200 to 1,000.

  In addition, as the polymerizable unsaturated compound other than the isocyanate group-containing polymerizable unsaturated compound (B), it is preferable to use a polymerizable unsaturated compound having a hydroxyl group from the viewpoint of maintaining the functionality. Examples of the polymerizable unsaturated compound having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and the like. A monoesterified product of (meth) acrylic acid and a dihydric alcohol having 2 to 8 carbon atoms; a ε-caprolactone modified product of a monoesterified product of the (meth) acrylic acid and a dihydric alcohol having 2 to 8 carbon atoms; N-hydroxymethyl (meth) acrylamide; allyl alcohol; (meth) acrylate having a polyoxyethylene chain whose molecular end is a hydroxyl group; pentaerythritol triacrylate; isocyanuric acid ethylene oxide-modified diacrylate.

  Among these, from the viewpoint of maintaining functionality, the polymerizable unsaturated compound having a hydroxyl group is more preferably a polyfunctional polymerizable unsaturated compound having a hydroxyl group. Examples of the polyfunctional polymerizable unsaturated compound having a hydroxyl group include pentaerythritol triacrylate, isocyanuric acid ethylene oxide-modified diacrylate, and the like.

  Moreover, a commercial item can be used as a polymerizable unsaturated compound which has the said hydroxyl group. Commercially available product names include, for example, “Aronix M-215”, “Aronix M-303”, “Aronix M-305”, “Aronix M-306”, “Aronix M-5700” (above, Toagosei Co., Ltd.) Manufactured) and the like.

  When the composition (1) contains a polymerizable unsaturated compound other than the isocyanate group-containing polymerizable unsaturated compound (B), the content is 1 to 1 with respect to the total solid content of the composition (1). It is suitable that it is in the range of 40% by mass, preferably 3-30% by mass, more preferably 5-25% by mass.

  The composition (1) has a catalyst, a solvent, a pigment, an ultraviolet absorber, a light stabilizer, an antioxidant, a surface conditioner, an antifoaming agent, an emulsifier, and a surfactant, as long as the effects of the present invention are not impaired. Other additive components ordinarily used in the field of coating such as an agent, an antifouling agent, a wetting agent, a thickener, a dye, and a gloss adjusting agent can be appropriately contained.

  As said catalyst, the catalyst of a normal urethanation reaction can be used, Specifically, for example, octylic acid tin, dibutyltin diacetate, dibutyltin di (2-ethylhexanoate), dibutyltin dilaurate , Dioctyltin diacetate, dioctyltin di (2-ethylhexanoate), dibutyltin oxide, dibutyltin sulfite, dioctyltin oxide, dibutyltin fatty acid salt, lead 2-ethylhexanoate, zinc octylate, zinc naphthenate , Fatty acid zinc, bismuth octoate, bismuth 2-ethylhexanoate, bismuth oleate, bismuth neodecanoate, bismuth versatic acid, bismuth naphthenate, cobalt naphthenate, calcium octylate, copper naphthenate, tetra (2-ethylhexyl) Organometallic compounds such as titanate ; Tertiary amines, and the like. These may be used either alone or two or more kinds in combination.

  Moreover, when using a catalyst, as a catalyst amount, it is 0.0001-0.5 mass% with respect to the solid content total amount of a composition (1), Especially within the range of 0.0005-0.1 mass%. Preferably there is.

  When the composition (1) contains the above catalyst, the composition (1) is acetic acid, propionic acid, butyric acid, isopentanoic acid, hexanoic acid, 2-ethylbutyric acid, naphthene from the viewpoints of storage stability, curability and the like. Acid, octylic acid, nonanoic acid, decanoic acid, 2-ethylhexanoic acid, isooctanoic acid, isononanoic acid, lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, neodecanoic acid, versatic acid, isobutyric anhydride, itaconic anhydride Organic acids such as acid, acetic anhydride, citraconic anhydride, propionic anhydride, maleic anhydride, butyric anhydride, citric anhydride, trimellitic anhydride, pyromellitic anhydride, phthalic anhydride; inorganic acids such as hydrochloric acid, phosphoric acid; You may contain metal coordination compounds, such as acetylacetone and an imidazole type compound.

  The composition (1) may be in the form of a melt, a solution, a suspension, or an emulsion, but contains a resin (A) having an isocyanate-reactive group and a photopolymerization initiator in the solvent and an isocyanate group. It is preferable from a viewpoint of productivity and workability that it is the form of the solution in which the polymerizable unsaturated compound (B) was dissolved. In this case, the composition (1) contains a resin (A) having an isocyanate-reactive group and a photopolymerization initiation part, an isocyanate group-containing polymerizable unsaturated compound (B), and a solvent.

  Examples of the solvent include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone, cellosolves such as methyl cellosolve, ethyl cellosolve and butyl cellosolve, esters such as ethyl acetate and butyl acetate, and aromatic hydrocarbons such as toluene and xylene. , Methanol, ethanol, 1-propanol, 2-propanol (common name: isopropyl alcohol), alcohols such as 1-butanol, 2-methyl-1-propanol, 2-methyl-2-propanol, tetrahydrofuran, dimethylformamide, petroleum And hydrocarbons.

  Among the above solvents, esters can be preferably used from the viewpoint of solubility of the isocyanate group-containing polymerizable unsaturated compound (B). In the case where the substrate is plastic or the like, petroleum hydrocarbons can be preferably used.

  Examples of the pigment include a luster pigment, a color pigment, and an extender pigment. The pigments can be used alone or in combination of two or more.

  Examples of the bright pigment include aluminum (including vapor-deposited aluminum), copper, zinc, brass, nickel, glass flakes, aluminum oxide, mica, titanium oxide and / or iron oxide coated with iron oxide, titanium oxide, and the like. Examples thereof include mica coated with iron oxide.

  Examples of the color pigment include titanium oxide, zinc oxide, carbon black, molybdenum red, Prussian blue, cobalt blue, azo pigment, phthalocyanine pigment, quinacridone pigment, isoindoline pigment, selenium pigment, and perylene. Pigments, dioxazine pigments, diketopyrrolopyrrole pigments and the like.

  Examples of the extender pigment include clay, kaolin, barium sulfate, barium carbonate, calcium carbonate, talc, silica, and alumina white.

  When the composition (1) contains the pigment, the amount of the pigment is 0.01 to 200% by mass, preferably 0.02 to 50% by mass, based on the total solid content of the composition (1). %, More preferably in the range of 0.03 to 30% by mass.

  Formation of the undercoat coating film layer by the composition (1) can be performed by dipping, spraying, brush coating, knife coating, roller coating, roll coating, curtain coating, printing, spin coating, pouring and the like.

  The thickness of the undercoat coating layer formed by the composition (1) after curing is 5 to 100 μm, preferably 21 to 60 μm, more preferably from the viewpoint of smoothness, functional maintenance, water resistance, and the like. It is suitable to be in the range of 23-40 μm.

  In the film forming method of the present invention, even when the undercoat film layer is relatively thick, cracks are unlikely to occur, and the reason why a film excellent in adhesion, particularly water-resistant adhesion is formed is that the isocyanate reactive group and light The undercoat coating layer obtained by the reaction of the resin (A) having a polymerization initiation part with the isocyanate group-containing polymerizable unsaturated compound (B) is relatively soft and hardly generates stress in the coating. Inferred.

  The formed undercoat coating layer is preferably subjected to heat treatment and dried quickly from the viewpoint of productivity and workability.

  By the above heat treatment, the isocyanate reactive group in the resin (A) having an isocyanate reactive group and a photopolymerization initiation part usually reacts with the isocyanate group in the isocyanate group-containing polymerizable unsaturated compound (B), A strong coating is formed.

  When a hydroxyl group is present on the substrate surface, the substrate is usually bonded to the undercoat coating layer by the heat treatment (that is, a hydroxyl group of the substrate, such as a functional group having reactivity with an isocyanate group, and an isocyanate group). The isocyanate group of the group-containing polymerizable unsaturated compound (B) is allowed to react).

  A known method in this field can be appropriately used for drying the undercoat coating layer by heat treatment. Specifically, for example, hot air, hot gas, an infrared heater, an IR radiator, an oven, a heat roller, a microwave, and the like can be used.

  In the present invention, it is preferable to perform drying and baking with hot air, an infrared heater or the like from the viewpoints of ease of work and low temperature.

  The temperature of the heat treatment applied to the undercoat coating layer is in the range of 40 to 150 ° C., preferably 50 to 140 ° C., more preferably 70 to 130 ° C., from the viewpoints of productivity, workability, and thermal stability of the substrate. It is preferable to be within. The time for the heat treatment applied to the undercoat coating layer is 5 minutes to 24 hours, preferably 10 to 180 minutes, more preferably 15 to 120 minutes, and even more preferably 20 to 120 minutes. Is preferred.

  Thus, an undercoat coating layer is formed on the substrate. The formed undercoat coating film layer is preferably a cured coating film.

Step (2)
In the step (2), the composition (2) containing the functionally-imparting group-containing polymerizable unsaturated compound is used on the undercoat coating layer formed on the substrate in the step (1). A sex-imparting layer is formed.

  The polymerizable unsaturated group in the functionalized group-containing polymerizable unsaturated compound contributes to adhesion to the undercoat coating layer and polymerization in the functionalized layer. The desired functionality can be finally imparted to the base material by appropriately selecting the functionality-imparting group in the functionality-providing group-containing polymerizable unsaturated compound.

  By finishing the film formation method of the present invention by the post-process (3), which is the final process, the surface, the base material, the undercoat coating film layer and the functionality-imparting layer are firmly bonded together is modified. A base material to which functionality is newly imparted can be obtained.

Functionality-providing group-containing polymerizable unsaturated compound The functionality-providing group-containing polymerizable unsaturated compound is a compound having one or more polymerizable unsaturated groups and one or more functional-providing groups in the molecule.

  Examples of the polymerizable unsaturated group include acryloyl group, methacryloyl group, vinyl group, allyl group, propenyl group, isopropenyl group, maleimide group, vinyl ether group and the like. Among these, from the viewpoint of excellent reactivity, an acryloyl group, a methacryloyl group, and a vinyl group are preferable, an acryloyl group and a methacryloyl group are more preferable, and an acryloyl group is more particularly preferable.

  In the present invention, the functional group is a functional group having a function capable of imparting desired surface properties to the substrate.

Specifically, for example,
1) a hydrophilic group for imparting hydrophilicity;
2) Water / oil repellent group for imparting water / oil repellency,
3) a functional group with high or low incremental refraction to impart refractive index variation;
4) a functional group having ultraviolet absorptivity for imparting ultraviolet absorbing properties;
5) a functional group having light stability for imparting light stability;
6) a functional group having biological properties for imparting biological properties;
7) a flame retardant group for imparting flame retardancy;
8) An antistatic group for imparting antistatic properties,
Etc.

  That is, the functionality imparted to the substrate by the present invention includes 1) hydrophilicity, 2) water repellency / oil repellency, 3) refractive index fluctuation, 4) ultraviolet absorption characteristics, 5) light stability, and 6) organisms. Characteristics, 7) flame retardancy, and 8) antistatic properties.

Examples of the hydrophilic group include acid groups such as carboxyl group, sulfonic acid group and phosphoric acid group; betaine structure-containing groups such as carboxybetaine, sulfobetaine and phosphobetaine;
Polyoxyalkylene groups such as polyoxyethylene groups, polyoxypropylene groups, polyoxyalkylene groups containing both oxyethylene groups and oxypropylene groups;
Hydroxyl group, amide;
A tertiary amino group, a quaternary ammonium salt, etc. can be mentioned.

  Examples of the hydrophilic group-containing polymerizable unsaturated compound include (meth) acrylic acid or its alkali metal salt, amine salt and ammonium salt; itaconic acid or its alkali metal salt, amine salt and ammonium salt; vinylsulfonic acid, allyl Sulfonic acid, 2-sulfoethyl (meth) acrylate, 2-acrylamido-2-methylpropanesulfonic acid, 3-sulfopropyl (meth) acrylate, 4-styrenesulfonic acid, alkali metal salts, amine salts and ammonium salts of these sulfonic acids 2-acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, 2-acryloyloxypropyl acid phosphate, 2-methacryloyloxypropyl acid phosphate, alkoxides of these phosphoric acids Metal salts, amine salts and ammonium salts; methacryloyloxyethyl-N, N-dimethyl-N- (3-sulfopropyl) ammonium betaine, methacryloyloxyethyl-N, N-dimethylammonium-α-methylcarboxybetaine; polyethylene glycol ( (Meth) acrylate, polypropylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate; 2-hydroxyethyl (meth) acrylate, N-vinyl-2-pyrrolidone, acrylamide, N, N-dimethylacrylamide, hydroxyethylacrylamide, etc. N-hydroxyalkyl (meth) acrylamide; N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N- Dimethylaminopropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylamide, N, N-diethylaminoethyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, 2- (methacryloyloxy) ethyl Examples include trimethylammonium chloride, 2- (methacryloyloxy) ethyltrimethylammonium bromide, 2- (meth) acryloyloxyethyl-2 ′-(trimethylammonium) ethyl phosphate, 2- (methacryloyloxy) ethyltrimethylammonium dimethyl phosphate, and the like. it can.

  Examples of the alkali metal salt in the hydrophilic group-containing polymerizable unsaturated compound include lithium salt, sodium salt, potassium salt and the like.

  Examples of the water / oil repellent group-containing polymerizable unsaturated compound include at least one fluorine selected from the group consisting of the following general formulas (I), (II), (III), (IV) and (V): Examples thereof include polymerizable unsaturated compounds.

CH ₂ = CR ₁ COOR ₂ Rf (I)
Wherein, _{R 1} represents a hydrogen atom or a methyl group, _{R 2} is _{-C P H 2P -, - C} (C P H 2P + 1) H -, - CH 2 C (C P H 2P + 1) H- or -CH ₂ CH ₂ O-, Rf is _{-C n F 2n + 1, -} (CF 2) n H, -C n F 2n -CF 3, - (CF 2) p OC n F 2n C j H 2j + 1, - (CF 2) _{p OC m H 2m C i H} 2i H, -N (C P H 2P + 1) COC n F 2n + 1, -N (C P H 2P + 1) is _{SO 2 C n F 2n + 1} . However, p is 1-10, n is 1-16, m is 0-10, i is 0-16, j is an integer of 0-10. ]
CF ₂ = CFOR _g (II)
(Wherein R _g represents a fluoroalkyl group having 1 to 20 carbon atoms.)
CH ₂ = CHR _g (III)
(Wherein R _g represents a fluoroalkyl group having 1 to 20 carbon atoms.)
_{CH 2 = CR 3 COOR 5 R} j R 6 OCOCR 4 = CH 2 ··· (IV)
_Wherein, R 3, _{R 4} is a hydrogen atom or a methyl _group, R 5, _{R 6} is _{-C q H 2q -, - C} (C q H 2q + 1) H -, - CH 2 C (C q H 2q + 1) H- or _-CH 2 _CH 2 O-, the _{R j} is _-C t _{F 2t.} However, q is an integer of 1 to 10, and t is an integer of 1 to 16. ]
CH ₂ = CHR ⁷ COOCH ₂ (CH ₂ R _k ) CHOCOCR ₈ = CH ₂ (V)
^(Wherein, R 7, ^{R 8} represents a hydrogen atom or a methyl group, the _{R k} is _-C y _{F 2y + 1.} However, y is 1 to 16 integer.)
Examples of the fluorine-containing polymerizable unsaturated compound include the following specific examples.

Examples of the monomer represented by the general formula (I) include CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCOCH═CH ₂ , CF ₃ CH ₂ OCOCH═CH ₂ , CF ₃ (CF ₂ ) ₄ CH ₂ CH _2. OCOC (CH ₃ ) ═CH ₂ , C ₇ F ₁₅ CON (C ₂ H ₅ ) CH ₂ OCOC (CH ₃ ) ═CH ₂ , CF ₃ (CF ₂ ) ₇ SO ₂ N (CH ₃ ) CH ₂ CH ₂ OCOCH ═CH ₂ , CF ₃ (CF ₂ ) ₇ SO ₂ N (C ₃ H ₇ ) CH ₂ CH ₂ OCOCH═CH ₂ , C ₂ F ₅ SO ₂ N (CF ₂ ) ₇ CH ₂ CH ₂ OCOC (CH ₃ ) _{= CH 2, (CF 3)} 2 CF (CF 2) 6 (CH 2) 3 OCOCH = CH 2, (CF 3) 2 CF (CF 2) 10 (CH 2) 3 OCOC (CH 3) = CH _{2, CF 3 (CF 2)} 4 CH (CH 3) OCOC (CH 3) = CH 2, CF 3 CH 2 OCH 2 CH 2 OCOCH = CH 2, C 2 F 5 (CH 2 CH 2 O) 2 CH 2 OCOCH═CH ₂ , (CF ₃ ) ₂ CFO (CH ₂ ) ₅ OCOCH═CH ₂ , CF ₃ (CF ₂ ) ₄ OCH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , C ₂ F ₅ CON (C ₂ H _{5) CH 2 OCOCH = CH 2} , CF 3 (CF 2) 2 CON (CH 3) CH (CH 3) CH 2 OCOCH = CH 2, H (CF 2) 6 C (C 2 H 5) OCOC (CH 3 _{) = CH 2, H (CF} 2) 8 CH 2 OCOCH = CH 2, H (CF 2) 4 CH 2 OCOCH = CH 2, H (CF 2) CH 2 OCOC (CH 3) = CH 2, C _{3 (CF 2) 7 SO 2} N (CH 3) CH 2 CH 2 OCOC (CH 3) = CH 2, CF 3 (CF 2) 7 SO 2 N (CH 3) (CH 2) 10 OCOCH = CH 2, _{C 2 F 5 SO 2 N (} C 2 H 5) CH 2 CH 2 OCOC (CH 3) = CH 2, CF 3 (CF 2) 7 SO 2 N (CH 3) (CH 2) 4 OCOCH = CH 2, _{C 2 F 5 SO 2 N (} C 2 H 5) C (C 2 H 5) HCH 2 OCOCH = CH 2 and the like.

Examples of the fluoroalkylated olefin represented by the general formulas (II) and (III) include C ₃ F ₇ CH═CH ₂ , C ₄ F ₉ CH═CH ₂ , C ₁₀ F ₂₁ CH═CH ₂ , C such as _{3 F 7 OCF = CF 2,} C 7 F 15 OCF = CF 2 and _C 8 _F 17 OCF = CF ₂ and the like.

The monomer represented by the general formula (IV) and (V) for _{example, CH 2 = CHCOOCH 2 (CF} 2) 3 CH 2 OCOCH = CH 2, CH 2 = CHCOOCH 2 CH (CH 2 C 8 F 17) OCOCH = CH _{2 and the} like can be mentioned.

Examples of the water / oil repellent group-containing polymerizable unsaturated compound include polymerizable unsaturated compounds having a Si—CH ₃ group or —O—Si—CH ₃ group. Specifically, it is an acrylate or methacrylate having a polysiloxane chain (which may have a branched structure), and commercially available products include, for example, “Silaplane FM-0711”, “Silaplane FM-0721”, “ Sailer plane FM-0725 "(all manufactured by JNC) and the like.

  Examples of refractive index varying groups include benzyl groups, partially or fully halogenated benzyl groups, or partially or fully halogenated alkyl, alkenyl or alkyne groups. Examples of the unsaturated compound include benzyl acrylate, pentabromobenzyl acrylate, 1H, 1H, 7H-dodecafluoroheptyl methacrylate, 1H, 1H-heptafluorobutyl acrylate and trifluoroethyl acrylate.

  Examples of the UV-absorbing functional group-containing polymerizable unsaturated compound include 2-hydroxy-4- (3-methacryloyloxy-2-hydroxypropoxy) benzophenone and 2-hydroxy-4- (3-acryloyloxy-2-hydroxy). Propoxy) benzophenone, 2,2′-dihydroxy-4- (3-methacryloyloxy-2-hydroxypropoxy) benzophenone, 2,2′-dihydroxy-4- (3-acryloyloxy-2-hydroxypropoxy) benzophenone, 2- (2′-hydroxy-5′-methacryloyloxyethylphenyl) -2H-benzotriazole and the like can be mentioned.

  Examples of the photostable functional group-containing polymerizable unsaturated compound include 4- (meth) acryloyloxy-1,2,2,6,6-pentamethylpiperidine, 4- (meth) acryloyloxy-2,2, 6,6-tetramethylpiperidine, 4-cyano-4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine, 1- (meth) acryloyl-4- (meth) acryloylamino-2,2 , 6,6-tetramethylpiperidine, 1- (meth) acryloyl-4-cyano-4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine, 4-crotonoyloxy-2,2, 6,6-tetramethylpiperidine, 4-crotonoylamino-2,2,6,6-tetramethylpiperidine, 1-crotonoyl-4-crotonoyloxy-2 2,6,6-tetramethylpiperidine, and the like.

  Examples of functional groups that impart biological properties include groups having antifouling properties and groups that promote growth of biological systems.

  Examples of the polymerizable unsaturated compound containing a group having antifouling properties include copper (II) diacrylate, copper (II) dimethacrylate, dibutyltin maleate, tin (II) diacrylate, and tin (II) dimethacrylate. , Trialkyl tin methacrylate, zinc dimethacrylate and the like.

  Examples of groups that promote the growth of biological systems include succinimide, glucoside, and sugar groups. Examples of the polymerizable unsaturated compound having a group that promotes the growth of a biological system include N-acyloxysuccinimide and 2-methacryloxyethyl glucoside.

  Flame retardant groups can include fully or partially chlorinated or brominated alkanes or nitrogen or phosphorus containing groups.

  Examples of the flame retardant group-containing polymerizable unsaturated compound include tribromoneopentyl methacrylate, bis (2-methacryloxyethyl) phosphate, monoacryloxyethyl phosphate, and the like.

  Examples of the antistatic group include tertiary amino, ethoxylated amino, alkanolamide, glycerol stearate, sorbitan, and sulfonate group.

  Examples of the antistatic group-containing polymerizable unsaturated compound include 2-diisopropylaminoethyl methacrylate, 3-dimethylaminoneopentyl acrylate or oleylbis (2-hydroxyethyl) amine, stearyl acrylate, vinyl stearate and the like. it can.

  It is not hindered that the functional group-containing polymerizable unsaturated compound is an isocyanate group-containing polymerizable unsaturated compound (B) that is a constituent of the composition (1).

  Examples of the functional group-containing polymerizable unsaturated compound include compounds represented by any of the following chemical formulas.

[Wherein, R represents an organic group. ]
R group which represents an organic group in said formula has said functional provision group.

  Functionality-providing group-containing polymerizable unsaturated compound has adhesion to the undercoat coating layer (reactivity with the isocyanate group-containing polymerizable unsaturated compound (B) contained in the undercoat coating layer) and the functionality-imparting layer. From the viewpoint of curability, the unsaturated group equivalent is preferably in the range of 90 to 1,500, preferably 100 to 1,000, and more preferably 100 to 500.

  The molecular weight of the functionalized group-containing polymerizable unsaturated compound is preferably a number average molecular weight of 100 to 3,000, particularly preferably 100 to 1,000, from the viewpoint of the reactivity of the unsaturated group.

  Moreover, what has one functional provision group in a compound can be used suitably from a viewpoint of polymerization reactivity as a functional provision group containing polymerizable unsaturated compound.

  The functional group-containing polymerizable unsaturated compound may be used alone or in combination of two or more.

  The composition (2) contains the above-described functional group-containing polymerizable unsaturated compound as an essential component, but from the viewpoint of improving the curability of the functional layer, the adhesion with the undercoat coating layer and A polymerizable unsaturated compound other than the functional-providing group-containing polymerizable unsaturated compound can be used as long as the functional expression effect is not inhibited.

  Examples of the polymerizable unsaturated compound other than the functional group-containing polymerizable unsaturated compound include a monofunctional polymerizable unsaturated group-containing compound and a polyfunctional polymerizable unsaturated group-containing compound.

  Examples of the monofunctional polymerizable unsaturated group-containing compound include esterified products of monohydric alcohol and (meth) acrylic acid. Specifically, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (Meth) acrylate, neopentyl (meth) acrylate, cyclohexyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, isobornyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate, styrene, α-methylstyrene, Examples thereof include vinyl aromatic compounds such as vinyl toluene and α-chlorostyrene.

  Examples of the polyfunctional polymerizable unsaturated group-containing compound include esterified products of a polyhydric alcohol and (meth) acrylic acid. Specifically, for example, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol Di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetrapropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 1,3-butanediol di (meth) ) Acrylate, 1,4-butanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, Di (meth) acrylate compounds such as 1,6-hexanediol di (meth) acrylate, bisphenol A ethylene oxide modified di (meth) acrylate, isocyanuric acid ethylene oxide modified di (meth) acrylate, and isosorbide di (meth) acrylate; (Meth) acrylate, glycerin ethylene oxide modified tri (meth) acrylate, glycerin propylene oxide modified tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane ethylene oxide modified tri (meth) acrylate, trimethylolpropane propylene oxide Modified tri (meth) acrylate, isocyanuric acid ethylene oxide modified tri (meth) acrylate, pentaerythritol Tri (meth) acrylate compounds such as li (meth) acrylate and ε-caprolactone modified tris (acryloxyethyl) isocyanurate; pentaerythritol tetra (meth) acrylate, pentaerythritol ethylene oxide modified tetra (meth) acrylate, pentaerythritol propylene oxide Modified tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, ditrimethylolpropane ethylene oxide modified tetra (meth) acrylate, ditrimethylolpropane propylene oxide modified tetra (meth) acrylate, diglycerin tetra (meth) acrylate, diglycerin Ethylene oxide modified tetra (meth) acrylate, diglycerin propylene oxide modified tetra (meth) ) Tetra (meth) acrylate compounds such as acrylate; other examples include dipentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate.

  Further, examples of the polyfunctional polymerizable unsaturated group-containing compound include ethylene oxide-modified phosphoric acid di (meth) acrylate, ethylene oxide-modified phosphoric acid tri (meth) acrylate, polyfunctional (meth) acrylamide compound, urethane (meta ) Acrylate resin, epoxy (meth) acrylate resin, polyester (meth) acrylate resin and the like.

  Examples of the polyfunctional (meth) acrylamide compound include N, N′-methylenebisacrylamide, N- [tris (3-acrylamidepropoxymethyl) methyl] acrylamide, and the like.

  The urethane (meth) acrylate resin reacts in an amount such that the hydroxyl group is equimolar or excessive with respect to the isocyanate group, using, for example, a polyisocyanate compound, a hydroxylalkyl (meth) acrylate and a polyol compound as raw materials. Can be obtained.

  The polymerizable unsaturated compounds other than the above-described functional group-containing polymerizable unsaturated compound may be used alone or in combination of two or more.

  Of the polymerizable unsaturated compounds other than the functional group-containing polymerizable unsaturated compound, a polyfunctional unsaturated group-containing compound can be preferably used from the viewpoint of improving the curability of the functional layer.

  From the viewpoint of improving the curability of the functional layer, the polymerizable unsaturated compound other than the functional group-containing polymerizable unsaturated compound has an unsaturated group equivalent of 30 to 700, particularly 70 to 700, more particularly 100. It is preferable to be within a range of ˜700.

  When using a polymerizable unsaturated compound other than the functional group-containing polymerizable unsaturated compound, the amount used is 0.3 to 100 parts by mass relative to the total amount of the functional group-containing polymerizable unsaturated compound. %, Particularly 5 to 100% by mass, more preferably 5 to 50% by mass.

  In particular, when the polyfunctional polymerizable unsaturated group-containing compound is used as a polymerizable unsaturated compound other than the functional group-containing polymerizable unsaturated compound, the amount of the polyfunctional polymerizable unsaturated group-containing compound is used. Is 0.3 to 70 parts by mass, preferably 0.5 to 40 parts by mass, more preferably 0.5 to 40 parts by mass, based on the total amount of the functional group-containing polymerizable unsaturated compound, from the viewpoint of improving the curability of the functional layer. Preferably it is in the range of 0.8 to 20 parts by mass.

  The composition (2) may be in the form of a melt, a solution, a suspension, or an emulsion, but is in the form of a solution in which a functional-providing group-containing polymerizable unsaturated compound is dissolved in a solvent. Is preferable from the viewpoint of productivity and workability. In this case, the composition (2) contains a functional group-containing polymerizable unsaturated compound and a solvent.

  In composition (2), as long as it does not impair the effects of the present invention, other than the functional group-containing polymerizable unsaturated compound and the functional group-containing polymerizable unsaturated compound used as necessary In addition to polymerizable unsaturated compounds, coating of polymerization initiators, solvents, surface conditioners, antifoaming agents, emulsifiers, surfactants, antifouling agents, wetting agents, thickeners, pigments, dyes, gloss adjusting agents, etc. Other additive components usually used in the field can be appropriately contained.

  Examples of the polymerization initiator include a photopolymerization initiator that generates free radicals (even in the form of an intermediate) by absorption of active energy rays, and a thermal polymerization initiator that generates free radicals (even in the form of an intermediate) upon heating. Etc. can be used. Among these, it is preferable to use a photopolymerization initiator.

Photoinitiators include photochemically activatable compounds (eg, benzoin); combinations of chromophores and coinitiators (eg, benzophenone and tertiary amines) and mixtures thereof; sensitizers and coinitiators Combinations with agents (eg thioxanthone and tertiary amine) or chromophores (eg thioxanthone and aminoketone); redox systems such as combinations of H ₂ O ₂ and iron (II) salts; dyes and borates and Examples thereof include electron transport pairs such as amines.

  Specific examples of the photopolymerization initiator include α-diketone compounds such as benzyl and diacetyl; acyloin compounds such as benzoin; acyloin ether compounds such as benzoin methyl ether, benzoin ethyl ether and benzoin isopropyl ether; thioxanthone, 2, Thioxanthone compounds such as 4-diethylthioxanthone, 2-isopropylthioxanthone, thioxanthone-4-sulfonic acid; benzophenone, o-methylbenzoylbenzoate, 4-methylbenzophenone, 4-phenylbenzophenone, 4,4′-bis (dimethylamino) benzophenone Benzophenone compounds such as 4,4′-bis (diethylamino) benzophenone; Michler's ketone compound; acetophenone, 2- (4-toluenesulfonyloxy) -2- Phenylacetophenone, p-dimethylaminoacetophenone, α, α′-dimethoxyacetoxybenzophenone, 2,2′-dimethoxy-2-phenylacetophenone, p-methoxyacetophenone, 2-methyl [4- (methylthio) phenyl] -2-morpholino -1-propanone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, α-isohydroxyisobutylphenone, α, α′-dichloro-4-phenoxyacetophenone, 1 -Acetophenone compounds such as hydroxy-cyclohexyl-phenyl-ketone; acylphosphine oxide compounds such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (acyl) phosphine oxide; anthraquinone, 1,4- Quinones such Futokinon; phenacyl chloride, trihalomethyl phenyl sulfone, tris (trihalomethyl) -s-halogen compounds such as triazine; can be exemplified peroxides such as di -t- butyl peroxide.

  Examples of commercially available photopolymerization initiators include IRGACURE-127, Irgacure-184, Irgacure-261, Irgacure-369, Irgacure-500, Irgacure-651, Irgacure-754, Irgacure-819, Irgacure-907. , Irgacure-CGI-1700, Irgacure-2959, Lucirin-TPO, Darocur-1173 (above, BASF Corporation, trade name); Kayacure-MBP, Kayacure-DETX-S, Kayacure- DMBI, Kayacure-EPA, Kayacure-OA (above, Nippon Kayaku Co., Ltd., trade name); Vicure-10, Vicure-55 (above, STAUFF R Co., LTD., Trade name); Trigonal P1 (manufactured by AKZO Co., LTD., Trade name); Sandray 1000 (SANDOZ Co., LTD.). ), Product name); Deep (DEAP) (manufactured by APJOHN Co., LTD., Product name); QUANTACURE-PDO, CantaCure-ITX, CantaCure-EPD (above, Ward Brekinsop) (Trade name) manufactured by WARD BLEKINSOP Co., LTD.], ESACURE KIP 150, ESACURE ONE (trade name, manufactured by LAMBERTI), and the like.

  The said photoinitiator can be used individually or in combination of 2 or more types.

  In the case where the composition (2) contains the photopolymerization initiator, the content of the photopolymerization initiator is based on the total amount of the functionalized group-containing polymerizable unsaturated compound from the viewpoint of maintaining functionality. In the range of 0.05 to 20 parts by mass, preferably 0.1 to 15 parts by mass, and more preferably 0.2 to 12 parts by mass.

  Examples of the thermal polymerization initiator include benzoyl peroxide, octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, cumene hydroperoxide, tert-butyl peroxide, tert-butyl peroxylaurate, and tert- Organic peroxides such as butyl peroxyisopropyl carbonate, tert-butyl peroxyacetate, diisopropylbenzene hydroperoxide; azobisisobutyronitrile, azobis (2,4-dimethylvaleronitrile), azobis (2-methylpropiononitrile) ), Azobis (2-methylbutyronitrile), 4,4′-azobis (4-cyanobutanoic acid), dimethylazobis (2-methylpropionate), azobis [2-methyl-N- (2 Azo compounds such as hydroxyethyl) -propionamide] and azobis {2-methyl-N- [2- (1-hydroxybutyl)]-propionamide}; persulfates such as potassium persulfate, ammonium persulfate and sodium persulfate Etc.

  Examples of commercially available thermal polymerization initiators include VA-044, VA-046B, V-50, VA-057, VA-061, VA-067, VA-086, V-60, V-70, and V. -65, V-601, V-59, V-40, VF-096, VAm-110 (above, manufactured by Wako Pure Chemical Industries, Ltd., trade name), perbutyl H (made by NOF Corporation, trade name), etc. be able to.

  The thermal polymerization initiator may be used as a redox initiator by using a reducing agent such as sugar, sodium formaldehyde sulfoxylate, iron complex or the like, if necessary.

  The said thermal polymerization initiator can be used individually or in combination of 2 or more types.

  When the composition (2) contains the above thermal polymerization initiator, the amount of the thermal polymerization initiator is based on the total amount of the functionalized group-containing polymerizable unsaturated compound from the viewpoint of maintaining functionality. 0.05 to 20 parts by mass, preferably 0.1 to 15 parts by mass, and more preferably 0.2 to 12 parts by mass.

  Examples of the solvent include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone, cellosolves such as methyl cellosolve, ethyl cellosolve and butyl cellosolve, esters such as ethyl acetate and butyl acetate, and aromatics such as toluene and xylene. Hydrocarbons, methanol, ethanol, 1-propanol, 2-propanol (common name: isopropyl alcohol), alcohols such as 1-butanol, 2-methyl-1-propanol, 2-methyl-2-propanol, tetrahydrofuran, dimethylformamide , Water and the like.

  The content of the functional group-containing polymerizable unsaturated compound in the composition (2) is 0.01 to 30% by mass, particularly 0.1 to 20% by mass, based on the total amount of the composition (2). More particularly, it is preferably in the range of 1 to 15% by mass.

  Formation of the functional layer by the composition (2) can be performed by dipping, spraying, brush coating, knife coating, roller coating, roll coating, curtain coating, printing, spin coating, casting, or the like.

  The thickness after curing of the functionality-imparting layer formed by the composition (2) is 10 μm or less, preferably 5 μm or less, more preferably 1 μm or less, from the viewpoint of imparting functionality, adhesion and final finished appearance. More particularly preferably, it is in the range of 0.05 to 0.7 μm.

Process (3)
After the step (2), the base material, the undercoat coating layer and the functional layer are integrated by irradiating active energy rays on the base material on which the under coating layer and the functional layer have been formed. Thus, it is possible to obtain a coated article that has been firmly bonded and has a modified surface and newly imparted functionality.

  A well-known thing can be used as an active energy ray. Specific examples include ultraviolet light, visible light, laser light (near infrared laser, visible light laser, ultraviolet laser, etc.), microwaves, electromagnetic waves, and the like.

  Of these active energy rays, ultraviolet rays can be suitably used from the viewpoint of economy.

  Irradiation with an active energy ray can be performed using any light source that emits electromagnetic waves having a wavelength that can be absorbed by the photopolymerization initiator present in the functional layer provided by the step (2). Such a light source usually emits an electromagnetic wave having a wavelength in the range of 200 nm to 2,000 nm.

  A well-known thing can be used as an irradiation source of an active energy ray. Specifically, for example, ultra high pressure, high pressure, medium pressure, low pressure mercury lamp, electrodeless lamp, chemical lamp, carbon arc lamp, xenon lamp, metal halide lamp, fluorescent lamp, tungsten lamp, LED (Light Emitting Diode), light emitting diode ), Sunlight, etc. can be used. In addition, a pulsed emission type active energy ray irradiation apparatus can also be used.

  Irradiation of active energy rays can also be performed using an electron beam.

  In addition, the irradiation of the active energy ray may be performed on the entire region and / or a part thereof, for example, through a mask or using a laser beam. It is also possible to cure the coating only in a specific area by the means.

The irradiation amount of the active energy ray may be within a range in which a bond can be formed between the undercoat coating layer having a polymerizable unsaturated group and a photopolymerization initiation part and the functional layer, and usually, for example, a high pressure mercury lamp. case of, 50~3,000mJ / cm ^2, in the case of a metal halide lamp, 100~5,000mJ / cm ^2, especially for a high-pressure mercury lamp, 100~1,000mJ / cm ^2, when the metal halide lamp, A range of 500 to 2,000 mJ / cm ² is preferable.

  Irradiation with active energy rays can be performed in air or under an inert gas. As the inert gas, nitrogen gas, carbon dioxide, argon, helium, or a mixture thereof can be used.

  Moreover, you may heat together with hardening by an active energy ray. As the heating means, hot air, hot gas, infrared heater, IR radiator, oven, hot roller and the like can be used.

  When heating is performed, the heating conditions are determined from the viewpoints of productivity, workability, and thermal stability of the substrate, but the heating temperature is within a range of 30 to 120 ° C, particularly 50 to 90 ° C. The heating time is preferably in the range of 1 to 60 minutes, particularly 1 to 20 minutes.

  When heating, the order of active energy ray irradiation and heating is not particularly limited, heating may be performed after active energy ray irradiation, active energy ray irradiation may be performed after heating, and active energy ray irradiation. Heating may be performed simultaneously.

  When performing active energy ray irradiation and heating at the same time, heat from an active energy ray irradiation source (for example, heat generated by a lamp) may be used as a heat source. Further, when the active energy ray irradiation is performed after the heating, the active energy ray irradiation may be performed in a state in which the film-forming substrate is heated (a state having residual heat).

  After irradiation with active energy rays, the functionally imparted group-containing polymerizable unsaturated compound remaining without reacting can be removed as necessary.

  The residue can be removed, for example, by immersion in a solvent, washing with water, acetone, or the like. From the viewpoint of residue removability, it is possible to employ means such as ultrasonic waves during the cleaning.

  Hereinafter, the present invention will be described more specifically with reference to production examples, examples and comparative examples. However, the present invention is not limited to these. In each example, “parts” and “%” are based on mass unless otherwise specified. Moreover, the film thickness of a coating film is based on a cured coating film.

Production and production example 1 of polymerizable unsaturated monomer having photopolymerization initiation part
In a reaction vessel equipped with a thermometer, thermostat, stirring device, reflux condenser, air introduction tube and dropping device, 39 parts of acryloyloxyethyl isocyanate, “Irgacure 2959” (trade name, manufactured by BASF, 1- [4- (2 -Hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, photopolymerization initiator having a hydroxyl group, solid content 100%) 61 parts, p-methoxyphenol 0.1 part Was stirred at 90 ° C. for 8 hours while blowing dry air into the liquid to obtain a polymerizable unsaturated monomer (a1) having a photopolymerization initiation part. The isocyanate reaction rate determined by titration was 99%.

Production Production Example 2 of Resin (A) Having Isocyanate-Reactive Group and Photopolymerization Start Part 2
A reaction vessel equipped with a thermometer, thermostat, stirrer, reflux condenser, nitrogen inlet tube and dripping device was charged with 45 parts of butyl acetate and stirred at 115 ° C. while blowing nitrogen gas. 29 parts of cyclohexyl methacrylate, 14 parts of methyl methacrylate, 5 parts of butyl acrylate, 26 parts of 2-hydroxyethyl methacrylate, 8 parts of polymerizable unsaturated monomer (a1) having the photopolymerization initiation part obtained in Production Example 1, A monomer mixture consisting of 10 parts of butyl acetate and 2 parts of 2,2′-azobisisobutyronitrile was added dropwise at a uniform rate over 4 hours and further aged at the same temperature for 1 hour. Thereafter, a mixture of 1 part of 2,2′-azobisisobutyronitrile and 15 parts of butyl acetate was added dropwise to the reaction vessel over 3 hours. After completion of the addition, the mixture was aged for 1 hour and then diluted with butyl acetate. A hydroxyl group-containing acrylic resin (A-1) solution having a photopolymerization initiation part with a solid content of 50% was obtained. The obtained resin (A-1) contains 5% of a photopolymerization initiator in terms of “Irgacure 2959” in the resin solid content. Moreover, the hydroxyl value of this resin (A-1) was 124 mgKOH / g.

Production Example 3
A reaction vessel equipped with a thermometer, thermostat, stirrer, reflux condenser, nitrogen inlet tube and dropping device was charged with 45 parts of butyl acetate and stirred at 115 ° C. while blowing nitrogen gas. 18 parts of cyclohexyl methacrylate, 9 parts of methyl methacrylate, 3 parts of butyl acrylate, 36 parts of 2-hydroxyethyl methacrylate, 8 parts of polymerizable unsaturated monomer (a1) having the photopolymerization initiation part obtained in Production Example 1 A monomer mixture consisting of 10 parts of butyl acetate and 2 parts of 2,2′-azobisisobutyronitrile was added dropwise at a uniform rate over 4 hours and further aged at the same temperature for 1 hour. Thereafter, a mixture of 1 part of 2,2′-azobisisobutyronitrile and 15 parts of butyl acetate was added dropwise to the reaction vessel over 3 hours, followed by aging for 3 hours after completion of the addition. After cooling to 70 ° C. and stopping the supply of nitrogen gas, 0.1 part of p-methoxyphenol and 0.01 g of dibutyltin dilaurate were added, and 14 parts of acryloyloxyethyl isocyanate was added while blowing dry air into the liquid. It was added dropwise over time. Then, it diluted with butyl acetate and obtained the hydroxyl-containing acrylic resin (A-2) solution which has a photoinitiation part with a solid content of 50%. The obtained resin (A-2) contains 5% of a photopolymerization initiator in terms of “Irgacure 2959” in the resin solid content. Moreover, the hydroxyl value of this resin (A-2) was 112 mgKOH / g, and the unsaturated group equivalent was 1,000.

Production Example 4
A reaction vessel equipped with a thermometer, thermostat, stirrer, reflux condenser, nitrogen inlet tube and dropping device was charged with 45 parts of butyl acetate and stirred at 115 ° C. while blowing nitrogen gas. 15 parts of cyclohexyl methacrylate, 7 parts of methyl methacrylate, 3 parts of butyl acrylate, 36 parts of 2-hydroxyethyl methacrylate, 15 parts of polymerizable unsaturated monomer (a1) having the photopolymerization start part obtained in Production Example 1, A monomer mixture consisting of 10 parts of butyl acetate and 2 parts of 2,2′-azobisisobutyronitrile was added dropwise at a uniform rate over 4 hours and further aged at the same temperature for 1 hour. Thereafter, a mixture of 1 part of 2,2′-azobisisobutyronitrile and 15 parts of butyl acetate was added dropwise to the reaction vessel over 3 hours, followed by aging for 3 hours after completion of the addition. After cooling to 70 ° C. and stopping the supply of nitrogen gas, 0.1 part of p-methoxyphenol and 0.01 g of dibutyltin dilaurate were added, and 14 parts of acryloyloxyethyl isocyanate was added while blowing dry air into the liquid. It was added dropwise over time. Then, it diluted with butyl acetate and obtained the hydroxyl-containing acrylic resin (A-3) solution which has a photoinitiation part with a solid content of 50%. The obtained resin (A-3) contains 9% of a photopolymerization initiator in terms of “Irgacure 2959” in the resin solid content. Moreover, the hydroxyl value of this resin (A-3) was 122 mgKOH / g, and the unsaturated group equivalent was 1,000.

Production Example 5
Into a reaction vessel equipped with a thermometer, thermostat, stirring device, reflux condenser, nitrogen introducing tube and dropping device, 45 parts of butyl acetate was charged and stirred at 115 ° C. while blowing nitrogen gas. 10 parts of cyclohexyl methacrylate, 5 parts of methyl methacrylate, 2 parts of butyl acrylate, 36 parts of 2-hydroxyethyl methacrylate, 27 parts of polymerizable unsaturated monomer (a1) having the photopolymerization initiation part obtained in Production Example 1, A monomer mixture consisting of 10 parts of butyl acetate and 2 parts of 2,2′-azobisisobutyronitrile was added dropwise at a uniform rate over 4 hours and further aged at the same temperature for 1 hour. Thereafter, a mixture of 1 part of 2,2′-azobisisobutyronitrile and 15 parts of butyl acetate was added dropwise to the reaction vessel over 3 hours, followed by aging for 3 hours after completion of the addition. After cooling to 70 ° C. and stopping the supply of nitrogen gas, 0.1 part of p-methoxyphenol and 0.01 g of dibutyltin dilaurate were added, and 14 parts of acryloyloxyethyl isocyanate was added while blowing dry air into the liquid. It was added dropwise over time. Then, it diluted with butyl acetate and obtained the hydroxyl-containing acrylic resin (A-4) solution which has a photoinitiation part with a solid content of 50%. The obtained resin (A-4) contains 17% of a photopolymerization initiator in terms of “Irgacure 2959” in the resin solid content. Moreover, the hydroxyl value of this resin (A-4) was 141 mgKOH / g, and the unsaturated group equivalent was 1,000.

Production and production example 6 of a hydroxyl group-containing acrylic resin having a polymerizable unsaturated group
Into a reaction vessel equipped with a thermometer, thermostat, stirring device, reflux condenser, nitrogen inlet tube and dropping device, 45 parts of butyl acetate was charged and stirred at 115 ° C. while blowing nitrogen gas. A monomer mixture consisting of 39 parts of methacrylate, 20 parts of styrene, 30 parts of cyclohexyl methacrylate, 8 parts of methyl methacrylate, 3 parts of n-butyl acrylate, 2 parts of 2,2′-azobisisobutyronitrile and 10 parts of butyl acetate for 4 hours The solution was added dropwise at a uniform speed and aged at the same temperature for 1 hour. Thereafter, a mixture of 1 part of 2,2′-azobisisobutyronitrile and 15 parts of butyl acetate was added dropwise to the reaction vessel over 1 hour and aged for 1 hour after completion of the addition to obtain a hydroxyl group-containing acrylic resin solution. . Thereafter, the mixture was cooled to 80 ° C., and 8 parts of 2-acryloyloxyethyl isocyanate, 0.4 part of hydroquinone monomethyl ether and 0.1 part of dibutyltin dilaurate were charged into the hydroxyl group-containing acrylic resin solution while blowing air into the reaction vessel. The temperature was kept at 80 ° C. and aged for 4 hours. Thereafter, it was confirmed that substantially all of the isocyanate groups had reacted and diluted with butyl acetate to obtain a hydroxyl group-containing acrylic resin (Ac-1) solution having a polymerizable unsaturated group having a solid content of 50%. The obtained hydroxyl group-containing acrylic resin (Ac-1) having a polymerizable unsaturated group had a hydroxyl value of 126 mgKOH / g, a weight average molecular weight of 23,000, and an unsaturated group equivalent of 1,887.

Production Production Example 7 of Composition (1)
Hydroxyl-containing acrylic resin (A-1) solution 200 parts (solid content 100 parts) having a photopolymerization initiation part obtained in Production Example 2, isocyanate group-containing polymerizable unsaturated compound (B-1) (Note 1) 38 Parts (solid part 38 parts), "Sumijour N-3300" (trade name, manufactured by Sumika Bayer Urethane Co., Ltd., isocyanurate cycloadduct of hexamethylene diisocyanate, solid content 100%) 22 parts, dibutyltin diacetate 0.001 part, “TINUVIN123” (trade name, manufactured by BASF, light stabilizer, solid content 100%) 0.1 part and “Disparon LF-1984” (trade name, manufactured by Enomoto Kasei Co., Ltd., surface conditioner) , Solid content 50%) 0.02 part (solid content 0.01 part) was uniformly mixed, and further diluted with butyl acetate so that the solid content was 30%. )

  (Note 1) Isocyanate group-containing polymerizable unsaturated compound (B-1): an equimolar adduct of “Sumijour N-3300” and 4-hydroxybutyl acrylate. NCO equivalent weight 323. Weight average molecular weight 650. On average, it has 2 isocyanate groups and 1 unsaturated group per molecule.

Production Examples 8 to 26
In Production Example 7, compositions (1-2) to (1-20) having a solid content of 30% were obtained in the same manner as in Production Example 7 except that the composition shown in Table 1 was obtained. In addition, the compounding composition shown in Table 1 is based on the solid content mass of each component.

  (Note) in Table 1 means the following.

  (Note 2) Isocyanate group-containing polymerizable unsaturated compound (B-2): An equimolar adduct of isophorone diisocyanate isocyanurate ring adduct and 2-hydroxyethyl acrylate. NCO equivalent weight 393. Weight average molecular weight 800. One molecule has, on average, two isocyanate groups and one unsaturated group.

  (Note 3) Isocyanate group-containing polymerizable unsaturated compound (B-3): 1 mol of “Sumidule N-3300” and “Placcel FA-2” (trade name, manufactured by Daicel Corporation, ε-caprolactone of 2-hydroxyethyl acrylate 2 mol of an addition reaction product of a modified hydroxyl group-containing unsaturated compound (a compound obtained by ring-opening addition polymerization reaction of 2 mol of ε-caprolactone with respect to 1 mol of 2-hydroxyethyl acrylate). NCO equivalent 1,200. Weight average molecular weight 1,200. On average, one molecule has one isocyanate group and two unsaturated groups.

  (Note 4) Isocyanate group-containing polymerizable unsaturated compound (B-4): an addition reaction product of 1 mol of “Sumidur N-3300” and 2 mol of 4-hydroxybutyl acrylate. NCO equivalent 792. Weight average molecular weight 800. One molecule has one isocyanate group and two unsaturated groups on average.

  (Note 5) Isocyanate group-containing polymerizable unsaturated compound (B-5): an equimolar adduct of “Sumijour N-3300” and 2-hydroxyethyl acrylate. NCO equivalent weight 300. Weight average molecular weight 620. One molecule has, on average, two isocyanate groups and one unsaturated group.

  (Note 6) Isocyanate group-containing polymerizable unsaturated compound (B-6): an equimolar adduct of “Sumijour N-3300” and “Placcel FA-2”. NCO equivalent weight 424. Weight average molecular weight 850. On average, it has 2 isocyanate groups and 1 unsaturated group per molecule.

  (Note 7) Isocyanate group-containing polymerizable unsaturated compound (B-7): “Desmolux XP2510” (trade name, manufactured by Daicel Ornex, NCO equivalent 627, weight average molecular weight 1,200).

  (Note 8) Isocyanate group-containing polymerizable unsaturated compound (B-8): “Desmolux D100” (trade name, manufactured by Daicel Ornex, NCO equivalent 336, weight average molecular weight 700).

  (Note 9) Isocyanate group-containing polymerizable unsaturated compound (B-9): “Desmolux D200” (trade name, manufactured by Daicel Ornex, NCO equivalent 824, weight average molecular weight 1,100).

  (Note 10) Isocyanate group-containing polymerizable unsaturated compound (B-10): “Laromer LR9000” (trade name, manufactured by BASF, NCO equivalent 280, weight average molecular weight 800).

  (Note 11) “IRGACURE 184”: trade name, manufactured by BASF, photopolymerization initiator, solid content 100%).

  (Note 12) “GX-180A”: trade name, manufactured by Asahi Kasei Metals Corporation, aluminum pigment paste, solid content 74%.

  (Note 13) “Xiallic Sunbeam Gold T60-20”: trade name, manufactured by MERCK, titanium oxide-coated alumina flake pigment.

  (Note 14) “Monarch 1300”: trade name, manufactured by Cabot Corporation, carbon black pigment.

  In addition, the composition (1-20) of Production Example 26 is for a comparative example.

Production and production example 27 of composition (2)
A composition (2-1) was obtained by mixing 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 parts of “IRGACURE184”, 65 parts of ethanol and 25 parts of deionized water.

Production Example 28
10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “IRGACURE 184”, 65 parts of ethanol, 25 parts of deionized water and 4.3 parts of dimethylethanolamine were mixed to prepare the composition (2-2). Obtained.

Production Example 29
Composition (2-3) by mixing 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “IRGACURE184”, 65 parts of ethanol, 23 parts of deionized water and 2.9 parts of 28% ammonia water. Got.

Production Example 30
10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “IRGACURE 184”, 65 parts of ethanol, 17 parts of deionized water and 9.7 parts of 20% aqueous sodium hydroxide solution were mixed to prepare a composition (2- 4) was obtained.

Production Example 31
A composition (2-5) was obtained by mixing 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 65 parts of ethanol, 17 parts of deionized water and 9.7 parts of a 20% aqueous sodium hydroxide solution.

Production Example 32
10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “IRGACURE184”, 65 parts of ethanol, 14 parts of deionized water and 13.5 parts of 20% aqueous potassium hydroxide solution were mixed to prepare a composition (2- 6) was obtained.

Production Example 33
A composition (2-7) was obtained by mixing 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 65 parts of ethanol, 14 parts of deionized water and 13.5 parts of a 20% aqueous potassium hydroxide solution.

Production Example 34
10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “IRGACURE 184”, 65 parts of ethanol, 3 parts of deionized water and 23.1 parts of 5% aqueous lithium hydroxide solution were mixed to prepare a composition (2- 8) was obtained.

Production Example 35
A composition (2-9) was obtained by mixing 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 65 parts of ethanol, 3 parts of deionized water and 23.1 parts of a 5% aqueous lithium hydroxide solution.

Production Example 36
10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “IRGACURE184”, 65 parts of ethanol, 5 parts of deionized water and 25.6 parts of 20% aqueous sodium carbonate solution were mixed to give a composition (2-10 )

Production Example 37
10 parts of "Fluorester" (trade name, manufactured by Tosoh F-Tech, 2,2,2-trifluoroethyl methacrylate, molecular weight 168, solid content 100%), 1 part of "IRGACURE 184" and "Swazole 1000" (trade name, Maruzen) 90 parts of Petrochemical Co., Ltd. (petroleum hydrocarbon solvent) were mixed to obtain a composition (2-11).

Production Example 38
2-acrylamido-2-methylpropanesulfonic acid 10 parts, "Aronix M-313" (trade name, manufactured by Toagosei Co., Ltd., isocyanuric acid ethylene oxide modified di and triacrylate, solid content 100%) 0.5 parts, 0.5 parts of “IRGACURE 184”, 65 parts of ethanol, 17 parts of deionized water and 9.7 parts of 20% aqueous sodium hydroxide solution were mixed to obtain a composition (2-12).

Production Example 39
10 parts of 2-acrylamido-2-methylpropanesulfonic acid, “Aronix M-306” (trade name, manufactured by Toagosei Co., Ltd., pentaerythritol tri- and tetraacrylate, solid content 100%), 0.5 part, “IRGACURE 184” 0.5 part, 65 parts of ethanol, 17 parts of deionized water and 9.7 parts of 20% aqueous sodium hydroxide solution were mixed to obtain a composition (2-13).

Production Example 40
A composition comprising 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “Aronix M-306”, 65 parts of ethanol, 17 parts of deionized water and 9.7 parts of 20% aqueous sodium hydroxide solution. (2-14) was obtained.

Production Example 41
2-acrylamido-2-methylpropanesulfonic acid 10 parts, "Aronix M-306" 1 part, "IRGACURE 184" 0.5 part, ethanol 65 parts, deionized water 17 parts and 20% sodium hydroxide aqueous solution 9.7 parts Were mixed to obtain a composition (2-15).

Production Example 42
A composition comprising 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.5 part of “Aronix M-306”, 65 parts of ethanol, 3 parts of deionized water and 23.1 parts of 5% aqueous lithium hydroxide solution. (2-16) was obtained.

Production Example 43
2-acrylamido-2-methylpropanesulfonic acid 10 parts, N, N′-methylenebisacrylamide 0.5 part, “IRGACURE 184” 0.5 part, ethanol 65 parts, deionized water 3 parts and 5% lithium hydroxide aqueous solution 23.1 parts was mixed and the composition (2-17) was obtained.

Production Example 44
2-acrylamido-2-methylpropanesulfonic acid 10 parts, “A-GLY-9E” (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd., glycerin ethylene oxide-modified triacrylate (ethylene oxide 9 mol), solid content 100%) 0 .5 parts, “IRGACURE184” 0.5 part, ethanol 65 parts, deionized water 3 parts and 5% aqueous lithium hydroxide solution 23.1 parts were mixed to obtain a composition (2-18).

  In addition, the compositions (2-1) to (2-10) and (2-12) to (2-18) of Production Examples 27 to 36 and 38 to 44 are compositions having a hydrophilicity-imparting function, and are produced. The composition (2-11) of Example 37 is a composition having a water repellency imparting function.

Test plate substrate (ABS substrate)
The surface of a 100 mm × 150 mm × 3.0 mm acrylonitrile-butadiene-styrene (ABS) plate was degreased with isopropyl alcohol to obtain a substrate.

(Coating substrate)
The surface of a 100 mm × 150 mm × 3.0 mm acrylonitrile-butadiene-styrene (ABS) plate was degreased with isopropyl alcohol. Next, “Letane PG Hybrid Eco Sun Metallic Paint” (trade name, manufactured by Kansai Paint Co., Ltd.) was applied to the ABS plate so as to have a film thickness of 15 μm and dried at 80 ° C. for 5 minutes as a base material. .

Example 1
On the ABS base material, the composition (1-1) obtained in Production Example 7 was applied using an air spray so that the film thickness was 25 μm, set at room temperature for 10 minutes, and then at 80 ° C. Heated for 30 minutes to obtain a cured coating film. Next, on the cured coating film, the composition (2-4) obtained in Production Example 30 was spread using a micro wipe so that the film thickness became 0.1 μm, and then allowed to stand for 15 minutes. . Next, using a UV irradiation apparatus “CV-1200-G” (manufactured by Fusion UV Systems Japan Co., Ltd.), the distance between the base material and the high-pressure mercury lamp is set to 15 cm, the irradiance is 120 mW / cm ² , and the radiation is UV irradiation was performed with two passes at a speed of 3 m / min under the condition of an energy amount of 500 mJ / cm ² . Finally, the surface on which the film was formed was washed with water and naturally dried at room temperature to obtain a film-formed substrate.

Examples 2-102, Comparative Examples 1-4
Example 1 except that the materials listed in Table 2 were used as the substrate, the composition (1) and the composition (2), and the film thickness of the composition (1) was changed as described in Table 2. In the same manner as above, each film-forming substrate was obtained. In addition, Examples 1 to 40, 45 to 91, and 96 to 96 using the compositions (2-1) to (2-10) and the compositions (2-12) to (2-18) as the composition (2). 102 is a production example of a hydrophilicity-imparting film-forming substrate, and Examples 41 to 44 and 92 to 95 using the composition (2-11) as the composition (2) are water-repellent property-imparting film-forming substrates. This is a manufacturing example.

Evaluation of Film Forming Substrate Various tests were performed on each obtained film forming substrate. The evaluation results are shown in Table 2.

Test Method Smoothness: The smoothness of each film-forming substrate was evaluated according to the following criteria. A: Very smooth and very good B: Smooth and good B: Slightly rough and slightly bad X: Rough and bad

  Function maintenance property: About each film formation base material, the water contact angle after the initial stage and the following warm water immersion test was measured.

  <Warm water immersion test> The film-forming substrate was immersed in warm water of 50 ° C for 10 days and dried, and then the water contact angle was measured.

  The water contact angle was measured using a CA-X contact angle meter manufactured by Kyowa Interface Science Co., Ltd., by dropping 5 mg of deionized water on a film-forming substrate in an atmosphere of 23 ° C. and 65% RH. The measurement was performed by measuring the contact angle 15 seconds after the dropping.

  In the initial coating film that has been washed with water, the higher the degree of function expression, that is, the greater the degree of hydrophilicity or water repellency, and the smaller the difference in water contact angle between the initial stage and the hot water immersion test, the higher the function maintainability. Shows superiority. If the water contact angle is 30 ° or less, the hydrophilicity is good, and if the water contact angle is 90 ° or more, the water repellency is good.

  Water resistance: Each film-forming substrate was immersed in warm water at 50 ° C. for 10 days, and then washed and washed with water, and the appearance and adhesion of each film-forming substrate were evaluated according to the following criteria.

<Appearance [after water resistance test]>
◎: No change in appearance with respect to the coating before the test ○: Slightly blurred, blistering or discoloration is seen with respect to the coating before the test, but there is no problem when it is used as a product △ : Slight glossiness, blistering or discoloration is observed with respect to the film before the test. ×: Significant glossiness, blistering or discoloration is observed with respect to the film before the test.

<Adhesion [after water resistance test]>
According to JIS K 5600-5-6 (1990), 100 2 mm × 2 mm goblet meshes are made on the coating surface of each coating forming substrate, and an adhesive tape is applied to the surface, and then the coating film is peeled off rapidly. The number of gobang eye coats remaining on the surface was evaluated.

A: Remaining number / total number = 100/100, no missing edges ○: Remaining number / total number = 100/100, no edges missing Δ: Remaining number / total number = 99 to 90/100 X: Remaining number / total number = 89 or less / 100.

  In Comparative Examples 1 to 4, it is considered that a relatively large amount of the composition 2-4 or 2-11 layer was removed by washing with water after UV irradiation.

Claims (9)

On the substrate
Step (1): Using the composition (1) containing the resin (A) having an isocyanate-reactive group and a photopolymerization initiation part and the isocyanate group-containing polymerizable unsaturated compound (B), an undercoat coating layer is formed. Forming step,
Step (2): Functionality is imparted using the composition (2) containing a functionally-imparting group-containing polymerizable unsaturated compound on the substrate on which the undercoat coating layer has been formed in the step (1). A step of forming a layer, and a step (3): a step of irradiating active energy rays on the substrate on which the undercoat coating film layer and the functionality-imparting layer are formed by the steps (1) and (2),
A method of forming a film on a substrate, characterized in that   The film forming method according to claim 1, wherein the resin (A) having an isocyanate-reactive group and a photopolymerization start part is a hydroxyl group-containing resin (A1) having a photopolymerization start part.   The film forming method according to claim 2, wherein the hydroxyl group value of the hydroxyl group-containing resin (A1) having a photopolymerization initiation part is 15 to 240 mgKOH / g.   The film forming method according to claim 2 or 3, wherein the hydroxyl group-containing resin (A1) having a photopolymerization start part is a hydroxyl group-containing acrylic resin having a photopolymerization start part.   The film forming method according to claim 4, wherein the hydroxyl group-containing acrylic resin having a photopolymerization initiation part is a hydroxyl group-containing acrylic resin having a photopolymerization initiation part and a polymerizable unsaturated group.   The film forming method according to any one of claims 1 to 5, wherein the isocyanate group-containing polymerizable unsaturated compound (B) has a weight average molecular weight of 200 to 4,000.   The film forming method according to any one of claims 1 to 6, wherein the isocyanate group-containing polymerizable unsaturated compound (B) is a compound having two or more isocyanate groups in the molecule.   The composition (1) further contains an optionally blocked polyisocyanate compound other than the isocyanate group-containing polymerizable unsaturated compound (B). The method for forming a film according to the above.   The coated article by which the film was formed on the base material by the film formation method of any one of Claims 1-8.