JP5032249B2 - Composition for imprint molding and molded product using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet-curable composition, which can easily flow into a mold and has excellent adhesiveness to metal oxide such as IZO and ITO, for imprint molding. <P>SOLUTION: The composition for imprint molding comprises at least one kind of (meth)acrylate oligomer (A) selected among a group consisting of urethane (meth)acrylate oligomers and epoxy (meth)acrylate oligomers, at least one kind of (meth)acrylate monomer (B) selected among a group consisting of hydroxy group-containing (meth)acrylate monomers and carboxy group-containing (meth)acrylate monomers, and a photopolymerization initiator (C). The composition for imprint molding has viscosity of 1,000 mPa s or lower. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an imprint molding composition and a molded article using the same, and particularly, an ultraviolet curable imprint molding composition that is easy to flow into a mold and has excellent adhesion to metal oxides such as IZO and ITO. It is about.

  Recently, an imprint molding technique has been vigorously studied as a technique for forming a fine pattern at a low cost. The imprint molding technique is a technique for forming a desired pattern on a substrate by pressing a mold having desired irregularities on a resin material layer disposed on the substrate. In the imprint molding technique, a method of forming a pattern by heat using a thermoplastic resin or a thermosetting resin and a method of forming a pattern by ultraviolet irradiation using an ultraviolet curable resin are known. Yes.

  However, when a thermoplastic resin or a thermosetting resin is used, a large amount of energy must be consumed for heating and pressurization, and there is a problem that the molding time becomes long and the productivity is lowered. On the other hand, when a normal ultraviolet curable resin is used, the shrinkage at the time of curing is large, so the adhesion between the formed pattern and the substrate is poor, and particularly the adhesion to transparent conductive metal oxides such as IZO and ITO. The nature is bad. In addition, when a raw material composition prepared by diluting a high molecular weight oligomer with a monomer is used as an ultraviolet curable resin, the raw material composition has a high viscosity and the raw material composition is difficult to flow into the mold, and the transfer rate There is also a problem that the moldability is lowered due to a decrease in the thickness or a thin film remaining in unnecessary portions.

JP 2006-272947 A Shinji Matsui, “Development and Application of Nanoimprint”, CMC Publishing, August 2005

  Accordingly, the object of the present invention is to solve the above-mentioned problems of the prior art, with low energy consumption, short molding time, easy flow into the mold, and excellent UV curing with excellent adhesion to metal oxides such as IZO and ITO. An object of the present invention is to provide a mold imprint molding composition.

  As a result of diligent studies to achieve the above object, the inventors of the present invention include a specific (meth) acrylate oligomer and a specific (meth) acrylate monomer, and a composition having a certain viscosity or less flows into the mold. It was easy to find and excellent adhesion to metal oxides such as IZO and ITO, and the present invention was completed.

That is, the imprint molding composition of the present invention is
-At least one (meth) acrylate oligomer (A) selected from the group consisting of urethane (meth) acrylate oligomers and epoxy (meth) acrylate oligomers;
At least one (meth) acrylate monomer (B) selected from the group consisting of hydroxyl group-containing (meth) acrylate monomers and carboxyl group-containing (meth) acrylate monomers;
-Comprising a photopolymerization initiator (C),
-The viscosity is 1000 mPa · s or less.

  The imprint molding composition of the present invention preferably contains 40% by mass or more of a hydroxyl group-containing (meth) acrylate monomer having 2 carbon atoms from the (meth) acryloyl group to the hydroxyl group.

  The imprint molding composition of the present invention preferably contains 30% by mass or more of a carboxyl group-containing (meth) acrylate monomer.

  In the imprint molding composition of the present invention, the content of the (meth) acrylate oligomer (A) is preferably 30% by mass or more.

  The imprint molding composition of the present invention preferably further contains a (meth) acryloyl group-containing cyclic monomer.

  The imprint molding composition of the present invention preferably has the viscosity of 10 to 1000 mPa · s.

  In a preferred example of the imprint molding composition of the present invention, the amount of the photopolymerization initiator (C) is the sum of the (meth) acrylate oligomer (A) and the (meth) acrylate monomer (B). It is 0.1-10 mass parts with respect to 100 mass parts.

  The molded article of the present invention is obtained by curing the above-mentioned imprint molding composition by ultraviolet irradiation, and preferably has a glass transition temperature (Tg) of 50 ° C. or higher, and is suitable as a rib material for a display. .

  According to the present invention, the specific (meth) acrylate oligomer (A), the specific (meth) acrylate monomer (B), and the photopolymerization initiator (C) are included, and the viscosity is 1000 mPa · s or less. Thus, it is possible to provide an ultraviolet curable imprint molding composition that is easy to flow into a mold and has excellent adhesion to metal oxides such as IZO and ITO.

  The present invention is described in detail below. The imprint molding composition of the present invention comprises at least one (meth) acrylate oligomer (A) selected from the group consisting of urethane (meth) acrylate oligomers and epoxy (meth) acrylate oligomers, and hydroxyl group-containing (meth). It comprises at least one (meth) acrylate monomer (B) selected from the group consisting of an acrylate monomer and a carboxyl group-containing (meth) acrylate monomer, and a photopolymerization initiator (C), and has a viscosity of 1000 mPa · s. It is characterized by the following.

  In the imprint molding composition of the present invention, the hydroxyl group of the hydroxyl group-containing (meth) acrylate monomer and / or the carboxyl group of the carboxyl group-containing (meth) acrylate monomer is hydrogen bonded to a metal oxide such as IZO or ITO. Therefore, adhesion to these metal oxides is greatly improved, and pattern peeling at the time of demolding can be prevented.

  Further, since the imprint molding composition of the present invention contains a urethane (meth) acrylate oligomer and / or an epoxy (meth) acrylate oligomer having a molecular weight larger than that of the monomer, a molded product formed by ultraviolet irradiation is high. Has strength.

  Furthermore, since the composition for imprint molding of the present invention has a viscosity of 1000 mPa · s or less, it can easily flow into a mold (mold), can sufficiently improve the transfer rate, and has a sufficient remaining film thickness. Can be thinned. In the imprint molding composition of the present invention, the lower limit of the viscosity is not particularly limited, but the viscosity is preferably 10 mPa · s or more from the viewpoint of adhesion to the substrate.

  The (meth) acrylate oligomer (A) used in the imprint molding composition of the present invention is a urethane (meth) acrylate oligomer and / or an epoxy (meth) acrylate oligomer, and is a urethane acrylate oligomer and / or an epoxy acrylate oligomer. It is preferable. These (meth) acrylate oligomers may be used alone or in combination of two or more. When the composition for imprint molding does not contain these (meth) acrylate oligomers, the strength of the molded product formed by ultraviolet irradiation is lowered.

The urethane (meth) acrylate oligomer has at least one (meth) acryloyloxy group (CH ₂ ═CHCOO— or CH ₂ ═C (CH ₃ ) COO—) and a plurality of urethane bonds (—NHCOO—). A compound. The urethane (meth) acrylate oligomer can be produced, for example, by synthesizing a urethane prepolymer from a polyol and polyisocyanate, and adding a (meth) acrylate having a hydroxyl group to the urethane prepolymer.

  The polyol used for the synthesis of the urethane prepolymer is a compound having a plurality of hydroxyl groups (OH groups). Specific examples of the polyol include polyether polyol, polyester polyol, polytetramethylene glycol, polybutadiene polyol, and alkylene oxide modification. Examples include polybutadiene polyol and polyisoprene polyol. The polyether polyol is obtained, for example, by adding an alkylene oxide such as ethylene oxide or propylene oxide to a polyhydric alcohol such as ethylene glycol, propylene glycol, or glycerin. The polyester polyol is, for example, ethylene glycol. , Diethylene glycol, 1,4-butanediol, 1,6-hexanediol, propylene glycol, trimethylolethane, trimethylolpropane and other polyhydric alcohols and adipic acid, glutaric acid, succinic acid, sebacic acid, pimelic acid, suberin It is obtained from a polyvalent carboxylic acid such as an acid.

  The polyisocyanate is a compound having a plurality of isocyanate groups (NCO groups). Specifically, as the polyisocyanate, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), crude diphenylmethane diisocyanate (crude MDI), Examples include isophorone diisocyanate (IPDI), hydrogenated diphenylmethane diisocyanate, hydrogenated tolylene diisocyanate, hexamethylene diisocyanate (HDI), these isocyanurate-modified products, carbodiimide-modified products, and glycol-modified products.

  In the synthesis of the urethane prepolymer, it is preferable to use a catalyst for urethanization reaction. Examples of the catalyst for urethanization reaction include organic tin compounds, inorganic tin compounds, organic lead compounds, monoamines, diamines, triamines, cyclic amines, alcohol amines, ether amines, organic sulfonic acids, inorganic acids, titanium A compound, a bismuth compound, a quaternary ammonium salt, etc. are mentioned, Among these, an organotin compound is preferable. Suitable organic tin compounds include dibutyltin dilaurate, dibutyltin diacetate, dibutyltin thiocarboxylate, dibutyltin dimaleate, dioctyltin thiocarboxylate, tin octenoate, monobutyltin oxide, and the like.

  The (meth) acrylate having a hydroxyl group to be added to the urethane prepolymer is a compound having one or more hydroxyl groups and one or more (meth) acryloyloxy groups. The (meth) acrylate having a hydroxyl group can be added to the isocyanate group of the urethane prepolymer. Examples of the (meth) acrylate having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and pentaerythritol tri (meth) acrylate.

  The epoxy (meth) acrylate oligomer is a compound having a glycidyl group, preferably a compound having a glycidyl group and a cyclic structure such as a benzene ring, a naphthalene ring, a spiro ring, dicyclopentadiene, or tricyclodecane. It can be produced by reacting with (meth) acrylic acid.

  Examples of the compound having a glycidyl group include a bisphenol type epoxy resin, a phenol novolak type epoxy resin, a cresol novolak type epoxy resin, an alicyclic epoxy resin, and the like obtained by a reaction between bisphenol A or bisphenol F and epichlorohydrin. It is done.

  The imprint molding composition of the present invention preferably contains 30% by mass or more of the (meth) acrylate oligomer (A). When the content of the (meth) acrylate oligomer (A) in the imprint molding composition is 30% by mass or more, a molded product having sufficient strength can be obtained. In the imprint molding composition of the present invention, the content of the (meth) acrylate oligomer (A) is preferably 60% by mass or less. When the content of the (meth) acrylate oligomer (A) is 60% by mass or less, the viscosity of the imprint molding composition is sufficiently low.

  The (meth) acrylate monomer (B) used in the imprint molding composition of the present invention is a hydroxyl group-containing (meth) acrylate monomer and / or a carboxyl group-containing (meth) acrylate monomer, and a hydroxyl group-containing acrylate monomer and / or Or it is preferable that it is a carboxyl group-containing acrylate monomer. These (meth) acrylate monomers may be used alone or in combination of two or more. If the composition for imprint molding does not contain these (meth) acrylate monomers, the molded product cannot hydrogen bond with metal oxides such as IZO and ITO, so the adhesion to these metal oxides deteriorates, and at the time of demolding The molded product easily peels from the substrate.

The hydroxyl group-containing (meth) acrylate monomer is a compound having one or more hydroxyl groups and one or more (meth) acryloyloxy groups, and is a (meth) acryloyl group (CH ₂ ═CHCO— or CH ₂ ═C The number of carbon atoms from (CH ₃ ) CO—) to the hydroxyl group is preferably 2. As such hydroxyl group-containing (meth) acrylate monomers, specifically, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate and 2-hydroxybutyl (meth) acrylate are particularly preferable. If the number of carbon atoms from the (meth) acryloyl group to the hydroxyl group is 3 or more, the adhesion of the imprint molding composition to the metal oxide may be insufficient, while the (meth) acryloyl group to the hydroxyl group may be insufficient. A compound having 1 carbon is difficult to synthesize and obtain.

  When the imprint molding composition of the present invention contains a hydroxyl group-containing (meth) acrylate monomer as the (meth) acrylate monomer (B), the content of the hydroxyl group-containing (meth) acrylate monomer is 40% by mass or more. Preferably there is. When the content of the hydroxyl group-containing (meth) acrylate monomer in the imprint molding composition is less than 40% by mass, the imprint molding composition has insufficient adhesion to the metal oxide, and is removed from the substrate during demolding. The molded product is easily peeled off. The content of the hydroxyl group-containing (meth) acrylate monomer is preferably 70% by mass or less from the viewpoint of the strength of the molded product formed by ultraviolet irradiation.

  The carboxyl group-containing (meth) acrylate monomer is a compound having one or more carboxyl groups and one or more (meth) acryloyloxy groups. As the carboxyl group-containing (meth) acrylate monomer, specifically, β- (meth) acryloyloxyethyl hydrogen succinate, β- (meth) acryloyloxypropyl hydrogen succinate, β- (meth) acryloyloxyethyl Hydrogen phthalate, β- (meth) acryloyloxypropyl hydrogen phthalate, β- (meth) acryloyloxyethyl hydrogen tetrahydrophthalate, β- (meth) acryloyloxypropyl hydrogen tetrahydrophthalate, β- (meth) acryloyloxyethyl Examples include hydrogen hexahydrophthalate, β- (meth) acryloyloxypropyl hydrogen hexahydrophthalate, β-tris (acryloyloxymethyl) ethyl hydrogen phthalate, and the like.

  When the imprint molding composition of the present invention includes a carboxyl group-containing (meth) acrylate monomer as the (meth) acrylate monomer (B), the content of the carboxyl group-containing (meth) acrylate monomer is 30% by mass or more. Preferably there is. If the content of the carboxyl group-containing (meth) acrylate monomer in the imprint molding composition is less than 30% by mass, the imprint molding composition has insufficient adhesion to the metal oxide, and is removed from the substrate during demolding. The molded product is easily peeled off. In addition, it is preferable that content of a carboxyl group-containing (meth) acrylate monomer is 70 mass% or less from a viewpoint of the intensity | strength of the molded object formed by ultraviolet irradiation.

  The photopolymerization initiator (C) used in the imprint molding composition of the present invention is polymerized with the above-described (meth) acrylate oligomer (A) or (meth) acrylate monomer (B) by being irradiated with ultraviolet rays. Has the effect of starting. Examples of the photopolymerization initiator (C) include 4-dimethylaminobenzoic acid, 4-dimethylaminobenzoic acid ester, 2,2-dimethoxy-2-phenylacetophenone, acetophenone diethyl ketal, alkoxyacetophenone, benzyldimethyl ketal, benzophenone and 3,3-dimethyl-4-methoxybenzophenone, benzophenone derivatives such as 4,4-dimethoxybenzophenone, 4,4-diaminobenzophenone, alkyl benzoylbenzoate, bis (4-dialkylaminophenyl) ketone, benzyl, benzylmethyl ketal, etc. Benzyl derivatives of benzoin, benzoin derivatives such as benzoin and benzoin isobutyl ether, benzoin isopropyl ether, 2-hydroxy-2-methylpropiophenone, 1-hydroxycyclohexyl phenyl ketone, Thioxanthone and thioxanthone derivatives, fluorene, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis (2,4,6- Trimethylbenzoyl) -phenylphosphine oxide, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1,2-benzyl-2-dimethylamino-1- (morpholinophenyl) -butanone-1, etc. Is mentioned. One of these photopolymerization initiators (C) may be used alone, or two or more thereof may be used in combination.

  The amount of the photopolymerization initiator (C) in the imprint molding composition of the present invention is 100 parts by mass in total of the (meth) acrylate oligomer (A) and the (meth) acrylate monomer (B). The range of 0.1 to 10 parts by mass is preferable. When the blending amount of the photopolymerization initiator is less than 0.1 parts by mass, the effect of initiating UV curing of the imprint molding composition is small, whereas when it exceeds 10 parts by mass, the effect of initiating UV curing is saturated, The raw material cost of the imprint molding composition is increased.

  The imprint molding composition of the present invention preferably further contains a (meth) acryloyl group-containing cyclic monomer. A molded product (cured product) produced from the imprint molding composition comprising the (meth) acrylate oligomer (A) and the (meth) acrylate monomer (B) has a low glass transition temperature (Tg) and is slightly tacky. May have. On the other hand, when the imprint molding composition contains a (meth) acryloyl group-containing cyclic monomer, a ring structure is introduced into the molded product, and the glass transition temperature (Tg) of the molded product is increased, thereby tacking the molded product. Can be reduced.

  Note that the glass transition temperature of the molded product can also be increased by adding a crosslinking agent to the imprint molding composition. However, in this case, the degree of crosslinking of the molded product increases, so that curing shrinkage occurs and molding is performed. The adhesion force of the object to the substrate may be reduced. On the other hand, when a (meth) acryloyl group-containing cyclic monomer is added to the imprint molding composition and a cyclic structure is introduced into the molding, the degree of cross-linking of the molding does not increase. It is possible to increase the glass transition temperature of the molded product and reduce the tackiness of the molded product while maintaining the adhesive force to the substrate.

  The (meth) acryloyl group-containing cyclic monomer is a compound having one or more rings and one or more (meth) acryloyl groups. Here, examples of the ring include isobornyl, benzene ring, morpholine ring, and triazine ring. Among these, a heterocyclic ring such as morpholine ring is preferable. Specific examples of the (meth) acryloyl group-containing cyclic monomer include (meth) acryloylmorpholine. The said (meth) acryloyl group containing cyclic monomer may be used individually by 1 type, and may be used in combination of 2 or more type.

  The content of the (meth) acryloyl group-containing cyclic monomer is preferably in the range of 5 to 50% by mass and more preferably in the range of 10 to 50% by mass in the imprint molding composition. If the content of the (meth) acryloyl group-containing cyclic monomer is less than 5% by mass, the effect of increasing the glass transition temperature of the molded product to reduce tackiness is insufficient, while if exceeding 50% by mass, The reduction in the amount of oligomer reduces the strength and elongation, and the decrease in the hydroxyl group-containing monomer and / or the carboxyl group-containing monomer reduces the adhesive strength of the base material, so that the molded product is easily peeled off from the base material.

  As described above, the imprint molding composition of the present invention is easy to flow into a mold and has excellent adhesion to metal oxides such as IZO and ITO. Therefore, a molded product obtained by curing the imprint molding composition of the present invention by ultraviolet irradiation has a high transfer rate, a very thin residual film thickness, and is hardly peeled off from the substrate, and is suitable as a rib material for a display. is there.

  The molded product obtained by curing the imprint molding composition preferably has a glass transition temperature (Tg) of 50 ° C. or higher. A glass transition temperature of 50 ° C. or higher is particularly suitable as a rib material for a display using an electronic powder fluid because the molded product has very low tackiness and hardly adheres to powder.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.

  An imprint molding composition having the composition shown in Table 1 and Table 2 was prepared, and the viscosity at 25 ° C. was measured by the following method. Further, the transfer rate, the remaining film thickness, and the substrate were measured by the following method. The adhesive strength and the glass transition temperature of the molded product were measured. Moreover, the presence or absence of peeling from the base material of the molded product and the tackiness of the molded product were observed. The results are shown in Tables 1 and 2.

(1) Viscosity Using a rotary viscometer (model number: RS600, manufactured by Eihiro Seiki & Thermo Electron), put a UV curable resin liquid as a sample on a measurement plate kept at a constant temperature at 25 ° C, and use a dedicated cone plate ( Rotate the cone plate while applying a shear rate of 0.01 s ^{-1 to} 1000 s ^-1 using a diameter of 2 cm and an angle of 1 degree between the cone center and the sample outermost surface). From the relationship between the stress and shear rate, Viscosity values were obtained.

(2) Transfer rate and remaining film thickness The film on which the molded product is placed is cut with a razor blade, and the obtained sample is put into a small PP container, and a room temperature curing epoxy resin is poured and cured. The cured product is taken out from the small container and polished with a rotary polishing machine [Strouss Rotopol] until the cross section of the molded product can be seen. The obtained sample is observed with a digital microscope [Keyence VHX DIGITAL. MICROSCOPE], the cross section of the molded product is calculated from the top, bottom and height of the convex portion of the molded product. The transfer rate was determined by calculating the ratio of the cross-sectional area of the molded product relative to. Moreover, about the remaining film thickness, the thin film thickness which remains on the base material of the recessed part of a molded object similarly is measured. The transfer rate is good when it is 90% or more, and the remaining film thickness is good when it is 1 μm or less.

(3) Adhesive strength to base material A UV curable resin liquid is applied to a thickness of 100 μm by a bar coater on IZO deposited on a PET base material. Then, place the same film as the backing material so that the IZO surface faces the resin liquid, stretch the resin liquid with a rubber roller, and UV-irradiate (-700 mW / cm ² , 3000 mJ / cm ² ) to cure the resin liquid Let The handle portion of the obtained sample was sandwiched between chucks of a peel tester [Orientec STA-1150], pulled up at 50 mm / min, and the adhesive strength was calculated from the obtained load value and the sample width. The adhesive strength is good if it is 500 N / m or more.

(4) Glass transition temperature of the molded product
A plate-shaped UV curable composition of 7 mm x 50 mm x 1 mm is prepared, and the test piece is pulled and fixed to a vibration jig with a dynamic viscoelasticity measuring instrument [SEX EXSTAR-6000], and stress is applied at a frequency of 1 Hz. And make a response to occur at that time. The sine loss tan δ was determined from E ′ (storage elastic modulus) and E ″ (loss elastic modulus) determined from the measurement, and the temperature at which the peak occurred was defined as Tg (glass transition temperature). If it is 50 degreeC or more, it is favorable.

* 1 Kyoeisha Chemical Co., Ltd., trade name “3002A”, epoxy acrylate oligomer, weight average molecular weight (Mw) = 600, bisphenol A skeleton
* 2 Nippon Kayaku Co., Ltd., trade name "UX2201", urethane acrylate oligomer derived from polyether polyol, weight average molecular weight (Mw) = 7200
* 3 Nippon Synthetic Chemical Co., Ltd., trade name “UV3000B”, urethane acrylate oligomer derived from polyester polyol, weight average molecular weight (Mw) = 18000
* 4 Nippon Synthetic Chemical Co., Ltd., trade name “UV3700B”, urethane acrylate oligomer derived from polyether polyol, weight average molecular weight (Mw) = 36000
* 5 Kyoeisha Chemical Co., Ltd., trade name “HO-A”, 2-hydroxyethyl acrylate
* 6 Kyoeisha Chemical Co., Ltd., trade name “HOP-A”, 2-hydroxypropyl acrylate
* 7 Kyoeisha Chemical Co., Ltd., trade name “HOB-A”, 2-hydroxybutyl acrylate
* 8 Made by Shin-Nakamura Chemical, trade name “A-SA”, β-acryloyloxyethyl hydrogen succinate
* 9 Kyoeisha Chemical Co., Ltd., trade name “LA”, lauryl acrylate
* 10 Made by Osaka Organic Chemicals, trade name “4-HBA”, 4-hydroxybutyl acrylate
* 11 Shin-Nakamura Chemical Co., Ltd., trade name “A-MO”, acryloylmorpholine
* 12 Product name “IRGACURE 184”, 1-hydroxy-cyclohexyl-phenyl-ketone, manufactured by Ciba Specialty Chemicals

  From Table 1, Examples containing urethane (meth) acrylate oligomers or epoxy (meth) acrylate oligomers and hydroxyl group-containing (meth) acrylate monomers or carboxyl group-containing (meth) acrylate monomers and having a viscosity of 1000 mPa · s or less In the imprint molding compositions 1 to 8, the transfer rate was high, the residual film thickness was thin, the adhesive strength to the IZO film was high, and the molded product did not peel from the IZO film.

  Further, from the results of Examples 5 to 8, in addition to urethane (meth) acrylate oligomer or epoxy (meth) acrylate oligomer and hydroxyl group-containing (meth) acrylate monomer or carboxyl group-containing (meth) acrylate monomer, an acryloylmorpholine-containing monomer It has been found that the composition for print molding is particularly suitable for forming a rib material for a display using an electronic powder fluid because the molded article has a high glass transition temperature and low tackiness.

  On the other hand, the imprint molding compositions of Comparative Examples 1 to 4 having a viscosity exceeding 1000 mPa · s had a low transfer rate and a large residual film thickness. Further, the imprint molding composition of Comparative Example 5 containing lauryl acrylate had low adhesive strength to the IZO film, and the molded product was peeled off from the IZO film.

  In addition, the imprint molding composition of Example 9 in which a hydroxyl group-containing (meth) acrylate monomer having 4 carbon atoms from a (meth) acryloyl group to a hydroxyl group was blended had a low adhesive strength to an IZO film, and IZO Since the molded product was peeled off from the film, it is understood that a compound having 2 carbon atoms from the (meth) acryloyl group to the hydroxyl group is preferable as the hydroxyl group-containing (meth) acrylate monomer.

Claims (10)

At least one (meth) acrylate oligomer (A) selected from the group consisting of urethane (meth) acrylate oligomers and epoxy (meth) acrylate oligomers;
At least one (meth) acrylate monomer (B) selected from the group consisting of a hydroxyl group-containing (meth) acrylate monomer and a carboxyl group-containing (meth) acrylate monomer;
A photopolymerization initiator (C),
An imprint molding composition having a viscosity of 1000 mPa · s or less.   2. The imprint molding composition according to claim 1, comprising 40% by mass or more of a hydroxyl group-containing (meth) acrylate monomer having 2 carbon atoms from a (meth) acryloyl group to a hydroxyl group.   The composition for imprint molding according to claim 1, comprising 30% by mass or more of a carboxyl group-containing (meth) acrylate monomer.   Content of the said (meth) acrylate oligomer (A) is 30 mass% or more, The composition for imprint molding in any one of Claims 1-3 characterized by the above-mentioned.   Furthermore, the (meth) acryloyl group containing cyclic monomer is included, The composition for imprint molding in any one of Claims 1-4 characterized by the above-mentioned.   The composition for imprint molding according to any one of claims 1 to 5, wherein the viscosity is 10 to 1000 mPa · s.   The compounding quantity of the said photoinitiator (C) is 0.1-10 mass parts with respect to a total of 100 mass parts of the said (meth) acrylate oligomer (A) and the said (meth) acrylate monomer (B). The imprint molding composition according to claim 1, wherein the composition is an imprint molding composition.   A molded product obtained by curing the imprint molding composition according to claim 1 by ultraviolet irradiation.   The molded article according to claim 8, wherein the glass transition temperature (Tg) is 50 ° C or higher.   The molded product according to claim 9, wherein the molded product is a rib material for a display.