WO2006041089A1 - 活性エネルギー線硬化性樹脂組成物およびシート状光学物品 - Google Patents
活性エネルギー線硬化性樹脂組成物およびシート状光学物品 Download PDFInfo
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- WO2006041089A1 WO2006041089A1 PCT/JP2005/018787 JP2005018787W WO2006041089A1 WO 2006041089 A1 WO2006041089 A1 WO 2006041089A1 JP 2005018787 W JP2005018787 W JP 2005018787W WO 2006041089 A1 WO2006041089 A1 WO 2006041089A1
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- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- HHFAWKCIHAUFRX-UHFFFAOYSA-N ethoxide Chemical compound CC[O-] HHFAWKCIHAUFRX-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- GFAZHVHNLUBROE-UHFFFAOYSA-N hydroxymethyl propionaldehyde Natural products CCC(=O)CO GFAZHVHNLUBROE-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 235000013847 iso-butane Nutrition 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- PQIOSYKVBBWRRI-UHFFFAOYSA-N methylphosphonyl difluoride Chemical group CP(F)(F)=O PQIOSYKVBBWRRI-UHFFFAOYSA-N 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QBDSZLJBMIMQRS-UHFFFAOYSA-N p-Cumylphenol Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=CC=C1 QBDSZLJBMIMQRS-UHFFFAOYSA-N 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920006295 polythiol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- NNPPMTNAJDCUHE-UHFFFAOYSA-N trimethylmethane Natural products CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31—Surface property or characteristic of web, sheet or block
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31547—Of polyisocyanurate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Definitions
- the present invention relates to an active energy ray-curable resin composition used for the production of sheet-like optical articles, particularly prism sheets, lenticular lens sheets, Fresnel lenses, and the like, and a resin composition obtained by curing the resin composition.
- the present invention relates to a sheet-like optical article containing a cured product.
- Examples of the sheet-like optical article include a Fresnel lens sheet used for a projection screen such as a projection television, a lenticular lens sheet, and a prism sheet used as a backlight for a liquid crystal display device. These generally have a structure in which a lens portion made of a cured resin is formed on the surface of a transparent sheet-like substrate.
- a prism sheet is formed between a transparent sheet substrate such as a transparent plastic sheet and a lens mold in which a lens pattern is formed on a cylindrical surface.
- a composition using a hexafunctional urethane (meth) acrylate and a di (meth) acrylate compound in combination as an active energy ray curable resin for prism sheets is proposed in the examples. Has been.
- the resin composition exemplified here is excellent in scratch resistance and heat resistance when molded into a prism sheet.
- this prism sheet is placed on a flat surface with the prism surface facing upward, the four corners of the sheet tend to warp. Therefore, in the process of assembling into the knocklight, there is a problem that it is not easy to handle with a machine, and it is difficult to determine the position where the prism sheet that has been cut or placed is placed.
- the warpage of the sheet tends to increase more and may adversely affect image quality.
- An object of the present invention is to provide a sheet-like optical article having good heat resistance and extremely low warpage.
- the object is to provide an active energy ray-curable resin composition suitable for production, and a sheet-like optical article obtained using the resin composition.
- the cause of the warpage of the sheet-like optical article composed of the transparent sheet-like base material and the lens part obtained by curing the active energy ray-curable resin is the stress generated in the lens part during the molding of the lens part. It is thought that it remains. Therefore, it is necessary to reduce the residual stress in order to reduce the warpage of the sheet-like optical article.
- Examples of methods for reducing warpage include a method of lowering the polymerization shrinkage rate of the resin composition, and an elastic modulus of the cured product in order to reduce stress due to cooling shrinkage when changing from the molding temperature to the handling temperature. And a method of lowering the value.
- the range that can be generally reduced is limited, and it is considered difficult to solve the problem of warpage.
- the elastic modulus of the cured product can be significantly reduced. Lowering the elastic modulus of elasticity tends to adversely affect heat resistance.
- the present inventors have dealt with the problem by appropriately designing the dynamic elastic modulus of the active energy ray-curable resin cured product with respect to temperature in order to solve the above-mentioned problems.
- the present inventors have completed the present invention by finding the conditions under which the warpage of the sheet-like optical article under the environment is extremely small and the heat resistance is good.
- the dynamic elastic modulus is an elastic modulus that is detected by applying a strain (stress) that vibrates to a cured resin resin by dynamic viscoelasticity measurement, and is generally expressed as G ′.
- the warpage in question here refers to the warpage of the sheet-like optical product occurring near 25 ° C, and the dynamic elastic modulus of the cured resin resin at 25 ° C is sufficient. If designed low, a sheet-like optical article that does not warp at all can be obtained. However, in that case, the dynamic elastic modulus of the cured resin resin at a high temperature (for example, 60 ° C) tends to be lower than the value necessary to maintain the heat resistance required for the sheet-like optical article. Yes, it tends to cause thermal deformation.
- the dynamic elastic modulus at 60 ° C is designed to be high to make it difficult to thermally deform, the dynamic elastic modulus at 25 ° C tends to be higher than the value necessary to reduce warpage. The warpage of the sheet-like optical article becomes large.
- the present inventors have designed a sheet-like cured product by designing the upper limit of the dynamic elastic modulus at 25 ° C and the lower limit of the dynamic elastic modulus at 60 ° C within an optimal range. Reduce the warpage of optical articles, In addition, the inventors considered that the heat resistance could be improved, and intensively studied. As a result, the inventors have found the relationship between the dynamic elastic modulus and temperature of a cured cured resin ideal for reducing warpage and having sufficient heat resistance, and completed the present invention. Furthermore, the present inventors have found an active energy ray-curable resin composition suitable for realizing the relationship between the dynamic elastic modulus and the temperature thus designed, and have completed the present invention.
- the present invention provides a sheet-like optical article capable of obtaining a cured product having a dynamic elastic modulus at 25 ° C. of 950 MPa or less and a dynamic elastic modulus at 60 ° C. of lOOMPa or more. Active energy ray-curable rosin composition, and a sheet-like optical article obtained using this rosin composition.
- the present invention relates to hexamethylene diisocyanate and an iso-socyanurate-type triisocyanate compound obtained by trimerizing it, 2-hydroxypropyl acrylate and penta Urethane atelar toy compound (A) obtained by reacting with erythritol triatalylate, di (meth) attareito toy compound that does not have a urethane bond in the molecule and has two (meth) attaroyl groups
- An active energy ray-curable resin composition for a sheet-like optical article containing the product (B), and a radical photopolymerization initiator (C), and a sheet-like optical article obtained by using this resin composition. is there.
- the present invention is a sheet-like optical article characterized by having a lens portion having an indentation elastic modulus at 25 ° C of lOOOMPa or less and an indentation elastic modulus at 60 ° C of 90 MPa or more. .
- an active energy ray-curable resin composition for a sheet-like optical article suitable for forming a lens part such as a prism sheet for a backlight having small warpage and excellent heat resistance, and A sheet-like optical article obtained using the rosin composition can be provided.
- FIG. 1 is a schematic partial cross section of an embodiment (prism sheet) of a sheet-like optical article of the present invention.
- FIG. 1 is a schematic partial cross section of an embodiment (prism sheet) of a sheet-like optical article of the present invention.
- FIG. 2 is a schematic view showing a method for producing a sheet-like optical article (prism sheet) carried out in Examples.
- FIG. 3 is a schematic diagram showing the shape of a sample for measuring indentation elastic modulus of a sheet-like optical article (prism sheet) carried out in an example.
- the cured product obtained by curing the resin composition of the present invention with active energy rays has a dynamic elastic modulus at 25 ° C of 950 MPa or less and a dynamic elastic modulus at 60 ° C of lOOMPa or more. More preferably, the dynamic elastic modulus at 25 ° C is 700 MPa or less, and the dynamic elastic modulus at 60 ° C is 150 MPa or more.
- the warp can be made sufficiently small. If the dynamic elastic modulus at 60 ° C is lOOMPa or more, the warp can be reduced to 60 ° C. As a result, the heat resistance is less likely to be thermally deformed.
- the active energy ray-curable resin composition of the present invention is a cured product suitable for at least a part of a sheet-like optical article, that is, a dynamic elastic modulus at 25 ° C of 950 MPa or less and 60 ° C.
- a dynamic elastic modulus at 25 ° C of 950 MPa or less and 60 ° C There is no particular limitation as long as it can obtain a cured product having a dynamic modulus of elasticity of lOOMPa or more.
- a resin composition containing Z or an epoxy compound, an oxetane compound, a vinyl ether compound, and a cationic photopolymerization initiator can be used.
- a resin composition containing a urethane (meth) acrylate compound, an ester (meth) acrylate compound, and a radical photopolymerization initiator is particularly preferred.
- a resin composition containing (B) a di (meth) acrylate compound having no urethane bond in the molecule and having two (meth) atalyloyl groups, and (C) a radical photopolymerization initiator is more preferred.
- the composition may further contain (D) a compound having one polymerizable double bond group in the molecule and (E) other components.
- each component will be described.
- the component (A) used in the resin composition of the present invention is a compound containing at least one urethane (meth) acrylate compound having three or more (meth) attaylyl groups in the molecule.
- This component (A) is a component that causes a polymerization reaction or a crosslinking reaction when irradiated with an active energy ray such as ultraviolet rays in the presence of a radical polymerizable photopolymerization initiator, and is mainly used as a lens of a sheet-like optical article. Imparts scratch resistance and heat resistance of the part.
- the component (A) contains only one or two (()) urethane (meth) ataretoyl compounds having three or more (meth) atarylloyl groups in the molecule. It may also contain a urethane (meth) ataretoy compound having a (meth) atallyloyl group.
- Urethane (meth) ataretoy compound having three or more (meth) attalyloyl groups in a molecule is typically a polyisocyanate having two or more isocyanate groups in the molecule. It is a compound obtained by reacting a compound with one or more (meth) attalyroyl compounds having one or more (meth) atalyloyl groups and a hydroxyl group in the molecule.
- Examples of polyisocyanate compounds having two or more isocyanate groups in the molecule include various polyisocyanate compounds classified into aliphatic, alicyclic and aromatic groups. Can be used.
- isophorone diisocyanate, hexamethylene diisocyanate and trimer thereof are preferable.
- isophorone diisocyanate and isocyanurate type hexamethylene diisocyanate trimer strength are more preferable in terms of the scratch resistance and heat resistance of the resulting cured product.
- the (meth) attailyl compound having one or more (meth) attalyloyl groups and a hydroxyl group in the molecule examples thereof include hydroxyethyl (meth) acrylate, serine di (meth) acrylate, pentaerythritol tri (meth) acrylate, 2-hydroxy-1- 1-allyloyloxy-3-methacryloyloxypropane, and the like.
- the ata relay toy compound is more preferable than the catacrylate compound in terms of photocurability.
- Two or more kinds of the polyisocyanate compound and the (meth) atariloy compound having a hydroxyl group can be used in combination. By changing the type and ratio of the combination, it is possible to develop an elastic modulus and other physical properties that are different from the urethane (meth) ataretoy compound obtained by one kind of strength.
- the urethane reaction between the polyisocyanate compound and the (meth) atariloy compound having a hydroxyl group can be carried out according to a conventional method.
- a tin compound such as dibutyltin dilaurate
- a urethane (meth) acrylate compound can be easily synthesized by heating to 60-: LOO ° C.
- a reactive diluent such as (meth) acrylate having a low viscosity, which is directly related to the reaction during synthesis, may be used.
- component (A) hexamethylene diisocyanate and an isocyanurate type triisocyanate compound obtained by trimerizing it (isocyanurate type hexamethylenediocyanate) Nate trimer), 2-hydroxypropyl acrylate, and pentaerythritol triacrylate.
- urethane ata relay toy compounds include a mixture of urethane ata relay toy compounds represented by the following structural formulas (1) to (7).
- the resin composition has a relatively low polymerization shrinkage and is hard to be colored during curing, light resistance of the cured product, scratch resistance, heat resistance In addition, it is suitable for adjusting the dynamic elastic modulus of the resin composition to the optimum range.
- the molar ratio of hexamethylene diisocyanate to isocyanurate type hexamethylene diisocyanate trimer is preferably in the range of 2.0 to 4.0. If this molar ratio is within the above range, the shrinkage rate of the cured product does not become too large, and the dynamic elastic modulus of the cured product does not become too high.
- the mole ratio of 2-hydroxypropyl acrylate to pentaerythritol triacrylate is preferably in the range of 0.25-1. If this molar ratio is within the above range, sufficient toughness can be imparted without the dynamic elastic modulus of the cured product becoming too high.
- the molar ratio of the hydroxyl group to the isocyanate group is preferably in the range of 1.0 to 1.5. If this molar ratio is 1.0 or more, the unreacted isocyanate is reduced from remaining in the resin composition, and the storage stability can be improved. If the molar ratio is 1.5 or less, the unreacted pentaerythritol triacrylate and 2-hydroxypropyl acrylate are reduced in content, and the curing shrinkage is large. Can be prevented.
- the amount of component (A) is preferably 5 to 90 parts by mass, more preferably 10 to 80 parts per 100 parts by mass of the total amount of components (A), (B) and (D). Part by mass, particularly preferably 10 to 50 parts by mass.
- the lower limits of the above ranges are significant in terms of the scratch resistance and heat resistance of the lens portion of the sheet-like optical article. Further, the upper limit values of the above ranges are significant in that the dynamic elastic modulus of the cured resin can be adjusted by the component (B) and the component (D), and the warpage of the sheet can be reduced.
- the component (B) used in the resin composition according to the present invention is a di (meth) attareito toy compound having no urethane bond in the molecule and having two (meth) attaroyl groups.
- This component (B) is a component that causes a polymerization reaction or a crosslinking reaction by irradiation with active energy rays such as ultraviolet rays in the presence of a radical polymerizable photopolymerization initiator.
- active energy rays such as ultraviolet rays in the presence of a radical polymerizable photopolymerization initiator.
- the component (B) is preferably, for example, an aliphatic di (meth) acrylate having a molecular weight of 500 or more, a bisphenol A or F-type di (meth) acrylate.
- component (B) include di (meth) acrylate of polyalkylene glycols such as polyethylene glycol, polypropylene glycol, polybutylene glycol, and the power of hydroxybivalic acid neopentyl glycol ester.
- polyalkylene glycols such as polyethylene glycol, polypropylene glycol, polybutylene glycol, and the power of hydroxybivalic acid neopentyl glycol ester.
- Atalylate Bisphenol A ethylene oxide force of several moles or more of di (meth) acrylate
- Hydrogenated Bisphenol A Ethylene oxide added force of more than moles of di (meth) atrelate bis Examples thereof include di (meth) atalylate having an addition force of several moles or more of phenol F ethylene oxide, di (meth) acrylate having an addition force of ethylene oxide of hydrogenated bisphenol F.
- Addition of lenoxide to 1 ⁇ 2 mole of di (meth) acrylate, hydrogenated bisphenol F Di (meth) acrylate with an addition number of tylene oxide of 6 mol or more is preferred in terms of adjusting the dynamic elastic modulus of the cured resin.
- the compounds represented by the following general formulas (I) and (II) are more preferable in that they do not reduce the scratch resistance of the lens portion of the sheet-like optical article.
- the above component (B) may be used alone or in combination of two or more.
- the blending amount of component (B) is preferably 10 to 90 parts by mass, more preferably 20 to 90 parts per 100 parts by mass of the total amount of component (A), component (B) and component (D). Part by mass, particularly preferably 30 to 80 parts by mass.
- the lower limit of each of the above ranges is that the viscosity of the resin composition is reduced, the lens part has good moldability on the surface of the transparent plastic substrate, and the dynamic elasticity of the resin resin cured product at 25 ° C. This is significant in that it is adjusted so that the rate does not increase, and the warpage of the sheet-like optical article is reduced.
- the upper limit value of each of the above ranges is significant in that the dynamic elasticity of the cured resin is not too low, and sufficient heat resistance can be imparted to the lens portion of the sheet-like optical article. is there.
- Component (C) used in the resin composition of the present invention is a radical photopolymerization initiator.
- This component (C) is a compound that initiates radical polymerization of an ethylenically unsaturated compound by free radicals generated by irradiation with active energy rays such as ultraviolet rays and visible rays. It is a thing.
- component (C) a wide variety of compounds conventionally known as photodynamic radical polymerization initiators can be used.
- Specific examples of UV-sensitive radical photopolymerization initiators that can be used as component (C) include benzoin, benzoin monomethyl ether, benzoin monoethyl ether, benzoin isopropyl ether, acetoin, acetophenone, benzyl, benzophenone, p- Methoxybenzophenone, diethoxyacetophenone, 2,2-dimethoxy 1,2-diphenylethane 1-one, 2,2-diethoxyacetophenone, 1-hydroxycyclohexyl phenol ketone, methylphenol glyoxylate, ester 2-hydroxy-2-methyl-1-phenolpropane 1-one, 2-methyl-1- [4 (methylthio) phenol] 2 morpholinopropanone-1-one, 2-benzyl-2-one —Dimethylamino 1— (4-morpholinophyl) butanone — 1, 2 Hydr
- the above radical photopolymerization initiators may be used alone or in combination of two or more.
- the blending amount of component (C) is preferably 0.01 to: LO parts by mass, more preferably 100 parts by mass of the total amount of components (A), (B) and (D), more preferably 0.05 to 5 parts by mass, particularly preferably 0.1 to 4 parts by mass.
- the lower limit of each of the above ranges is significant in terms of curability due to the active energy ray of the resin composition.
- the upper limit value of each of the above ranges is significant in that it can prevent the lens portion of the sheet-like optical article from being markedly yellow.
- Component (D) used in the resin composition of the present invention is a compound having one polymerizable double bond group in the molecule.
- This component (D) is a component that causes a polymerization reaction by irradiation with active energy rays such as ultraviolet rays in the presence of a radically polymerizable photopolymerization initiator, and reduces the viscosity of the resin composition, thereby producing a transparent plastic substrate.
- active energy rays such as ultraviolet rays in the presence of a radically polymerizable photopolymerization initiator
- It is a component for improving the moldability of the lens part on the surface and further mitigating part of the internal stress generated inside the cured resin due to polymerization shrinkage during curing. That is, the warpage of the sheet-like optical article can be further reduced by replacing the component (D) with the components (A) to (C).
- component (D) typically, a mono (meth) attareito toy compound can be used. However, it is not limited to this, and any compound having one double bond in the molecule may be used.
- Specific examples of component (D) include phenol (meth) acrylate, benzyl (meth) acrylate, phenol (meth) acrylate, phenoloxyl (meth) acrylate, paracumyl phenol lenoxide modified (Meth) acrylate, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentane (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, propyl ( (Meth) acrylate, n-butyl (meth) acrylate, i- butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acryl
- the above component (D) may be used alone or in combination of two or more.
- the blending amount of the component (D) is preferably 0.1 to 20 parts by mass, more preferably 0 to 100 parts by mass of the total amount of the components (A), (B) and (D). 5 to 15 parts by mass, particularly preferably 1 to 10 parts by mass.
- the lower limits of the above ranges are significant in terms of reducing the viscosity of the resin composition and reducing the warpage of the sheet-like optical article.
- the upper limit value of each of the above ranges is significant in terms of heat resistance of the lens portion of the sheet-like optical article.
- a fluorine-containing compound or a compound having a long-chain alkyl group having 8 or more carbon atoms is used for improving scratch resistance or improving releasability. Also good.
- the fluorine-containing compound include trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate, octafluoropentyl (meth) acrylate, heptadecaful. Orodecyl (meth) talylate and the like.
- the compound having a long-chain alkyl group having 8 or more carbon atoms include dimer diols (for example, trade name Prepol 2033, etc., manufactured by Duchema), and long-chain alkyl compounds such as dimer (di) methacrylate of dimer diols.
- dimer diols for example, trade name Prepol 2033, etc., manufactured by Duchema
- long-chain alkyl compounds such as dimer (di) methacrylate of dimer diols.
- a compound can be used.
- antioxidants such as antioxidants, UV absorbers, light stabilizers (HALS, etc.), leveling agents, heat stabilizers, film material modifiers, flame retardants, polymerization inhibitors, radical thermal polymerization initiation as appropriate
- additives such as an agent, a cationic photopolymerization initiator, a cationic thermal polymerization initiator, a photopolymerization accelerator, a sensitizer, and a release agent may be contained.
- the amount of component (E) used is in a range that does not affect the essential effects of the resin composition of the present invention, for example, the total amount of component (A), component (B) and component (D) is 100 parts by mass. On the other hand, it is preferable to add 0 to: LO parts by mass, more preferably 0 to 4 parts by mass.
- the active energy ray-curable resin composition for a sheet-like optical article of the present invention having the above components (A) to (D) and optional (E) other component powers is, for example, a stirrer chip or splashing stirring. Use a stick or the like to mix thoroughly. This mixing is suitably performed under illumination such as a yellow lamp so that photopolymerization does not start.
- the resin composition of the present invention has a viscosity of 100 to 50 at 25 ° C from the viewpoint of the handling property of pouring into a lens mold and the controllability of the thickness of the lens part when producing a sheet-like optical article. It is preferably OOmPa's, and more preferably 150 to 3000 mPa's force. If the viscosity of the resin composition is 5000 mPa's or less, it is possible to transfer and mold the fine details of the fine lens pattern formed in the lens mold, and it is easy to control the thickness of the lens part thinly.
- the viscosity of the resin composition is lOOmPa's or more, the uncured resin composition sandwiched between the lens mold and the transparent sheet-like base material is difficult to overflow from the side cover. It is possible to prevent the lens portion from becoming too thin.
- the concentration of the strong acid contained in the resin composition of the present invention depends on the high humidity conditions of the sheet-like optical article formed from the lens part obtained by curing the resin composition and the transparent sheet-like substrate. From the viewpoint of the adhesion between the lens part after treatment and the sheet-like substrate, it is preferably less than lOOppm, and more preferably less than 50ppm.
- the concentration of the strong acid contained in the resin composition is less than lOOppm, the hydrophilicity of the cured product obtained by irradiating the resin composition with active energy rays can be suppressed, and the sheet-like optical article can be used in a high humidity environment. Moisture absorption of the cured product and moisture permeation into the interface between the lens portion and the sheet-like substrate when treated under conditions are suppressed, and adhesion can be easily maintained.
- Some of the (meth) atareto toy compounds used in the present invention can be obtained by a production process using a strong acid, and a strong acid mixed as an impurity in the (meth) acrylate compound is a resin composition.
- strong acids include sulfuric acid, nitric acid, hydrochloric acid, perchloric acid, p-toluenesulfonic acid and the like.
- Examples of a method for removing strong acid mixed as an impurity in the (meth) atari toy compound include a purification method such as alkali washing.
- alkali cleaning for example, an aqueous solution of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate, etc., or ammonia water, etc. is used for the (meth) atre toy compound lg. l Use about 2g in the tank
- Examples of the method include stirring. This alkali cleaning is preferably repeated a plurality of times until the concentration of the strong acid in the rosin composition becomes lOOppm or less.
- the sheet-like optical article of the present invention is obtained using the resin composition of the present invention.
- the sheet-shaped optical article comprises a cured product obtained by irradiating the resin composition of the present invention with an active energy ray and curing it.
- An article including a lens portion. This lens part is formed, for example, on at least one surface of a transparent sheet-like base material.
- the prism sheet which is an embodiment of the sheet-like optical article of the present invention will be described with reference to FIG.
- the prism sheet is composed of a transparent sheet-like substrate 1 and a lens portion 2 in which a large number of prism rows made of a cured product of the resin composition of the present invention are arranged in parallel.
- the transparent sheet-like substrate 1 is not particularly limited as long as it transmits an active energy ray.
- acrylic resin, polycarbonate resin, polyester resin, salt resin resin, polymethacrylimide A film, sheet or plate made of a resin such as resin can be used.
- the lens unit 2 may be provided directly on the surface of the transparent sheet substrate 1. Further, in order to improve the adhesion with the transparent sheet-like substrate 1, the surface of the transparent sheet-like substrate 1 is subjected to a surface treatment for improving the adhesion to form the surface treatment part 3, and then the lens part 2 Let's set up.
- a surface treatment for example, a method of forming an easy-adhesion layer made of polyester resin, acrylic resin, urethane resin, etc. on the surface of the transparent sheet-like substrate 1, or the surface of the transparent sheet-like substrate 1 is roughened.
- a surface treatment may be used.
- the surface processed portion 4 may be formed.
- an active energy ray-curable resin blended with a diffusing agent such as organic fine particles or silica fine particles having different refractive indexes can be used.
- the transparent sheet-like substrate 1 can be subjected to other treatments such as antistatic, antireflection, and adhesion prevention between substrates.
- the hardness, elastic modulus, creep deformation characteristics, elasticity, and the like were measured using test devices called “dynamic micro hardness tester” and “ultra micro hardness test system”. It is possible to measure physical properties related to deformation return.
- the elastic modulus obtained here is called indentation elastic modulus and has a correlation with Young's modulus.
- indentation elastic modulus has a correlation with Young's modulus.
- the indentation elastic modulus of the lens portion of the sheet-like optical article of the present invention is 1000 MPa or less at 25 ° C and 90 MPa or more at 60 ° C.
- it is 90 OMPa or less at 25 ° C and lOOMPa or more at 60 ° C. More preferably, it is 800 MPa or less at 25 ° C and 300 MPa or more at 60 ° C.
- the warp can be made sufficiently small. If the indentation elastic modulus at 60 ° C is 90 MPa or more, the warp can be reduced at 60 ° C. Heat resistance that is difficult to be thermally deformed is improved.
- molds used in the manufacture of sheet-like optical articles include metal molds such as aluminum, brass, and steel, silicone resin, urethane resin, epoxy resin, ABS resin, fluorine resin, and polymethylpentene.
- metal molds such as aluminum, brass, and steel, silicone resin, urethane resin, epoxy resin, ABS resin, fluorine resin, and polymethylpentene.
- molds made of synthetic resin such as resin, molds made from these materials, and molds made from materials mixed with various metal powders.
- metal molds are preferred for heat resistance and strength, and are suitable for continuous production. More specifically, the metal mold has advantages such as being resistant to polymerization heat generation, being difficult to deform, being hardly scratched, being capable of temperature control, and suitable for precision molding.
- the active energy ray light source used for the production of the sheet-like optical article includes, for example, Chemical lamps, low-pressure mercury lamps, high-pressure mercury lamps, metal halide lamps, electrodeless UV lamps (manufactured by Fusion UV Systems), visible light halogen lamps, xenon lamps, solar light, etc. can be used.
- the atmosphere at the time of irradiation with active energy rays may be air or an inert gas such as nitrogen or argon.
- the irradiation energy is, for example, 200-6 OOnm, preferably integrated energy power in the wavelength range of 320 to 390 nm. For example, 0.01 to: LOJ / cm 2 , preferably 0.5 to 8 J / cm 2 It is appropriate to irradiate as follows.
- part means “part by mass”.
- This urethane atta relay toy compound (UA2) is represented by the following structural formula (8).
- component (A) 35 parts of urethane atelar toy compound (UA1) is used, and as component (B), a dimethyl compound represented by the following formula (9) [compound of general formula (I) where 1 is 9]: Tatarirate (trade name: Atariester PBOM, manufactured by Mitsubishi Rayon Co., Ltd.) 25 parts, and dimetathalrate represented by the following formula (10) (trade name: Eufrontia BPEM-10, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) ) 40 parts, and (C) component, 1-hydroxycyclohexyl phenol ketone (trade name Irgacure 184, manufactured by Chino Specialty Chemicals Co., Ltd.) 1.2 parts, mixed with active energy ray curable A rosin composition was obtained.
- a dimethyl compound represented by the following formula (9) [compound of general formula (I) where 1 is 9]: Tatarirate (trade name: Atariester PBOM, manufactured by Mitsubishi Rayon Co.,
- dimetatalylate represented by formula (9), which is component (B) was changed to 20 parts, and further, (D) component, Phenoxetyl acrylate (trade name-Eufrontier PHE, Daiichi Industrial An active energy ray-curable resin composition was obtained in the same manner as in Example 1 except that 5 parts of Yakuhin Co., Ltd. was added.
- Example except that the amount of dimetatalylate represented by formula (10) as component (B) was changed to 30 parts, and 10 parts of fenoxychetyl acrylate was added as component (D). In the same manner as in Example 1, an active energy ray-curable resin composition was obtained.
- An active energy ray-curable resin composition was obtained in the same manner as in Example 1 except that 60 parts of 8684 (Daiichi Kogyo Seiyaku Co., Ltd.) were used.
- Active energy ray-curable resin composition similar to Example 1 except that each compound was purified so that the concentration of p-toluenesulfonic acid contained in the resin composition was 70 ppm. Got.
- the active energy ray-curable resin composition was the same as Example 1 except that each compound was purified so that the concentration of p-toluenesulfonic acid contained in the resin composition was 20 ppm. Got.
- urethane acrylate compound (UA2) 22 parts of urethane diacrylate compound (UA3) (trade name NK Oligo U-2PPA, manufactured by Shin-Nakamura Engineering Co., Ltd.), represented by formula (9)
- the active energy ray-curable resin composition was obtained by mixing 38 parts of dimetatalylate and 1.2 parts of 1-hydroxycyclohexyl phenol ketone.
- Table 1 shows a recipe for the above Examples and Comparative Examples.
- a transparent sheet-like substrate is formed between a cylindrical prism type 7 in which a copper thin film having a large number of prism rows with an apex angle of 48 ° formed at a pitch of 50 m is wound around the circumference, and a rubber-up roll 6. Material 5 was introduced.
- This transparent sheet-like substrate 5 has a surface treatment for improving adhesion (Fig. 1: Table A PET (polyethylene terephthalate) film (trade name: A-4100, manufactured by Toyobo Co., Ltd., thickness 188 m) subjected to the surface treatment unit 3) was used.
- the active energy ray-curable resin composition 10 is passed from the tank 8 through the pipe 9 having a nozzle attached to the tip, and the cylindrical prism type 7 and the transparent sheet shape.
- the transparent sheet-like substrate 5 was moved at a speed of about 5 mZmin while being supplied between the substrate 5 and the substrate 5.
- the cylindrical prism mold 7 is rotated in accordance with this, and the active energy ray-curable resin composition 10 sandwiched between the cylindrical prism mold 7 and the transparent sheet substrate 5 is a lamp.
- the prism sheet thickness was set to 255 ⁇ m, and all samples were manufactured under the same conditions.
- Heat source equipment such as a sheathed heater and a hot water jacket is placed inside or outside the tank 8 and the cylindrical prism type 7 for storing the active energy ray-curable resin composition in order to keep the temperature constant.
- the prism sheet was prepared while keeping the temperature of the resin in the tank 8 at 35 ° C and the surface temperature of the cylindrical prism mold 7 at 50-60 ° C.
- the physical properties and characteristics of the obtained active energy ray-curable resin composition, resin cured product (flat plate) and prism sheet were evaluated by the following methods.
- the viscosity at 25 ° C of the prepared active energy ray-curable resin composition was measured using an E-type viscometer (RE80 viscometer, manufactured by Toki Sangyo Co., Ltd.).
- a test piece was prepared by cutting a lmm-thick flat plate into a length of 30mm and a width of 10mm.
- the dynamic elastic modulus G ' is measured using a rheometer (trade name Rheosol-G3000, manufactured by UBM) under the conditions of torsion mode, frequency 1.59 Hz, twist angle 0.2 deg, and heating rate 4 ° CZmin. went.
- the prepared prism sheet was cut into a length of 49 mm and a width (prism ridge direction) of 37 mm to obtain a test piece.
- the amount of warpage was measured at room temperature, placed on a flat stage with the prism surface facing upward, and the vertical distance from the stage surface to the four corners was observed from the side using a microscope, and the average value was evaluated. An average value of 0.5 mm or less was judged good, and a value larger than 0.5 mm was judged bad.
- the prepared prism sheet was cut into a length of 188 mm and a width (in the prism ridge direction) of 195 mm to form a test piece, which was left in a 60 ° C environment with the prism surface facing up for 6.5 hours. After taking out from the environment at 60 ° C, it was further left at room temperature for 1 day, and the warpage was measured by the same method as the initial warpage measurement. A warp average value of 5. Omm or less was determined to be good, and a value greater than 5. Omm was determined to be defective.
- the obtained prism sheet is cut out to 49 mm in length and 37 mm in width (in the direction of the ridge line of the prism), placed on an acrylic plate (thickness 3 mm) with the lens surface facing downward, and further loaded onto the prism sheet.
- a glass plate was placed so as to be 0.8 g / cm 2 . In this state, after standing for 1 hour in an environment of 60 ° C, the prism surface was visually observed. Those with no abnormality on the prism surface were judged good, and those with abnormality due to deformation of the prism shape were judged as bad.
- the adhesion of the prism sheet was measured at room temperature according to JIS-K5400 “cross-cut tape method” by placing the prism sheet on a flat stage with the prism surface facing up.
- Treatment of the prism sheet under high-humidity conditions is as follows. This was done by placing it in a 5% environment for 1000 hours.
- Adhesion retention is before treatment under conditions of 60 ° C and humidity 95%.
- the adhesion of the prism sheet after the measurement is measured and the adhesion strength after treatment with respect to before treatment is ⁇ ⁇ 40% Is “X”, 41 to 60% is “ ⁇ ”, 61 to 80% is “ ⁇ ”, and 81 to 100% is “ ⁇ ”.
- a prism sheet 7 was manufactured using the cylindrical prism type 7 for prism array molding with an apex angle of 68 ° and a pitch of 54 m, under the same conditions as those described above.
- the obtained prism sheet was cut in a direction perpendicular to the prism row using two force razor blades parallel to each other at intervals of 1 mm, and processed into the shape shown in FIG.
- an adhesive (trade name: Alaldite, manufactured by Showa Polymer Co., Ltd.) was applied to one side of the surface cut with a force razor blade, and fixed on a slide glass to obtain a sample for evaluation.
- the indentation elastic modulus was measured using an ultra micro hardness test system (device name: Fischerscope HI OOV, manufactured by Fischer).
- a Vickers square pyramid material: diamond was used as the indenter, and the sample position was adjusted so that the indenter action point was near the center of one prism.
- a heating stage as an optional microhardness test system was used.
- the measurement was performed in a constant temperature room at 25 ° C according to the following procedure.
- Table 2 shows the results of the above evaluations performed on Examples and Comparative Examples.
- U3 Urethane diacrylate compound (trade name NK Oligo U-2PPA, manufactured by Shin-Nakamura Chemical Co., Ltd.)
- PBOM Dimetatalylate represented by formula (9) (trade name: Atariester PBOM, manufactured by Mitsubishi Rayon Co., Ltd.)
- BPEM—10 Dimetatalylate represented by formula (10) (trade name—Eufrontia BPE M—10, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
- GX-8684 Dimetatalylate represented by formula (11) (trade name: New Frontier GX-8684, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) ⁇ ]: Phenoxetyl Atylate (Brand name Frontier PHE, Daiichi Kogyo Seiyaku Co., Ltd.)
- Example 3 Further, comparing the warpage between Example 1 and Example 3, the dynamic elastic modulus at 25 ° C is higher in Example 3, but the warp is clearly smaller in Example 3. . This is due to the warpage reduction effect of the D component included in Example 3 but not included in Example 1.
- Example 5 was better than Example 1, and Example 6 was even better. This is because the concentration of p-toluenesulfonic acid contained in the resin composition is lower in Examples 5 and 6 than in Example 1. Similarly, when Example 2 and Example 7 were compared, the retention of adhesion was better in Example 7 than in Example 2.
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Abstract
Description
Claims
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US11/665,185 US7786184B2 (en) | 2004-10-15 | 2005-10-12 | Active energy ray curable resin composition and sheet-like optical article |
JP2006540945A JP4783296B2 (ja) | 2004-10-15 | 2005-10-12 | 活性エネルギー線硬化性樹脂組成物およびシート状光学物品 |
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JP (1) | JP4783296B2 (ja) |
KR (1) | KR100937293B1 (ja) |
CN (1) | CN100478711C (ja) |
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US10877191B2 (en) | 2015-06-30 | 2020-12-29 | 3M Innovative Properties Company | Barrier elements on a microstructured article having adhesive sealing layer and specified modulus of elasticity |
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Also Published As
Publication number | Publication date |
---|---|
KR100937293B1 (ko) | 2010-01-18 |
US20090030104A1 (en) | 2009-01-29 |
CN101044418A (zh) | 2007-09-26 |
US7786184B2 (en) | 2010-08-31 |
TW200612111A (en) | 2006-04-16 |
JP4783296B2 (ja) | 2011-09-28 |
KR20070065437A (ko) | 2007-06-22 |
CN100478711C (zh) | 2009-04-15 |
TWI384253B (zh) | 2013-02-01 |
JPWO2006041089A1 (ja) | 2008-05-15 |
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