KR20140098471A - Prism sheet resin composition having an excellent elastic recovering property - Google Patents
Prism sheet resin composition having an excellent elastic recovering property Download PDFInfo
- Publication number
- KR20140098471A KR20140098471A KR1020130011157A KR20130011157A KR20140098471A KR 20140098471 A KR20140098471 A KR 20140098471A KR 1020130011157 A KR1020130011157 A KR 1020130011157A KR 20130011157 A KR20130011157 A KR 20130011157A KR 20140098471 A KR20140098471 A KR 20140098471A
- Authority
- KR
- South Korea
- Prior art keywords
- prism sheet
- resin composition
- weight
- prism
- present
- Prior art date
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Classifications
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- 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
- C08G18/68—Unsaturated polyesters
- C08G18/683—Unsaturated polyesters containing cyclic groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
The present invention relates to a resin composition for a prism sheet, which comprises at least two monomers selected from the group consisting of TMPTA, OPPEA, PETA, HDDA, TPGDA, 2-HEA, 2-HEMA, 2-HPA and IBXA, 10 to 40% by weight of a urethane or epoxy acrylate oligomer, 0.1 to 5% by weight of a short wavelength initiator, and 0.1 to 5% by weight of a long wavelength initiator. The resin composition for a prism sheet is excellent in elasticity and does not cause damage due to an external impact, and optical properties to be lost thereby, that is, luminance decline can be prevented.
Description
The present invention relates to a resin composition for a prism sheet, which comprises at least two monomers selected from the group consisting of TMPTA, OPPEA, PETA, HDDA, TPGDA, 2-HEA, 2-HEMA, 2-HPA and IBXA, 10 to 40% by weight of a urethane or epoxy acrylate oligomer, 0.1 to 5% by weight of a short wavelength initiator, and 0.1 to 5% by weight of a long wavelength initiator.
The prism sheet is a kind of lens sheet, and is a sheet provided on the surface of the light guide plate of the backlight to improve the luminance in the front direction.
Generally, a photocurable acrylic ester-based material is used in a prism sheet. Acrylic ester-based materials are typically acrylate and methacrylate esters. Examples of specific acrylates include compounds having at least one acryloyl functional group such as urethane acrylate, epoxy acrylate and polyester acrylate.
Of these, urethane acrylate oligomers are widely used as various inks, coating agents or adhesives having high mechanical strength after curing, good adhesiveness to various substrates and good workability and being cured by light (photocurable type). However, existing urethane acrylates are not suitable for applications requiring high refractive index, such as prism sheets, which are low refractive index and high brightness functional optical films.
For this reason, epoxy acrylates have been used to make optical films having high refractive index and solvent resistance.
Epoxy acrylates generally have good solvent resistance and high refractive index, but there is a limit to the refractive index to be used in currently required high luminance optical films.
In order to solve such a problem, in the industry, a high refractive index acrylate composition liquid having a refractive index of 1.56 or more is prepared by using a halogen-containing acrylate having a halogen atom other than fluorine and a sulfur-containing acrylate having a sulfur atom as an acrylate compound. However, when high-performance optical films such as prism sheets are produced using high-refractive-index halogen-containing acrylates or sulfur-containing acrylates, various problems may arise. In the case of sulfur-containing acrylates, the ultraviolet curing rate is low and the manufacturing work is not easy due to the specific odor of sulfur.
In addition, although prism sheets are made using high refractive index acrylate using fluorene derivatives, it is not easy to use on the spot because of the price problem of fluorene derivatives themselves.
In order to produce a prism sheet resin, refractive index and adhesion should be considered. The strength of the cured prism coating film is physically very weak because of the consideration of refractive index and adhesion. Due to this weak intensity, the coating film, especially the prism shape, is easily damaged by the physical impact, and the damaged prism has a great influence on the optical characteristics. Accordingly, there is a demand for a prism sheet having excellent elastic restoring force while maintaining the refractive index and adhesion, that is, preventing luminance from lowering.
An object of the present invention is to provide a resin composition for a prism sheet having excellent elastic restoring force while preventing a decrease in brightness.
In order to accomplish the above object, the present invention provides a thermoplastic resin composition comprising 50 to 200 parts by weight of at least two monomers selected from the group consisting of TMPTA, OPPEA, PETA, HDDA, TPGDA, 2-HEA, 2-HEMA, 2- And a long wavelength initiator in an amount of 10 to 40% by weight, a urethane or epoxy acrylate oligomer in an amount of 10 to 40% by weight, a short wavelength initiator in an amount of 0.1 to 5% by weight and a long wavelength initiator in an amount of 0.1 to 5%
According to a preferred embodiment of the present invention, the resin composition for a prism sheet has a luminance of 4000 cd / m 2 or more and a strength of 200 g or more.
According to another preferred embodiment of the present invention, there is provided a prism sheet made of the resin composition for a prism sheet.
According to another preferred embodiment of the present invention, there is provided a backlight unit including the prism sheet.
According to the present invention, damage due to an external impact does not occur in the past, and the loss of optical characteristics, that is, the prevention of a decrease in luminance, can be expected. Also, since the protective film of the prism sheet that is currently used can be removed, the cost reduction of the product can be expected.
Hereinafter, the present invention will be described in detail.
The resin composition for a prism sheet according to the present invention may contain two or more monomers selected from the group consisting of TMPTA, OPPEA, PETA, HDDA, TPGDA, 2-HEA, 2-HEMA, 2-HPA and IBXA, urethane or epoxy acrylate oligomer, Irgracure 184, 369, 784, 819, 907, 2959, Darocure 1173, 4296 and TPO (BASF).
The two or more monomers selected from the group consisting of TMPTA, OPPEA, PETA, HDDA, TPGDA, 2-HEA, 2-HEMA, 2-HPA and IBXA used in the resin composition for a prism sheet according to the present invention are preferably 50 By weight to 80% by weight. The urethane or epoxy acrylate oligomer used in the resin composition for a prism sheet according to the present invention is preferably contained in an amount of 10 to 40% by weight based on the weight of the entire composition. The initiator used in the resin composition for a prism sheet according to the present invention is 0.1 to 5% by weight based on the total composition weight of Irgracure 184, 369, 784, 819, 907, 2959, Darocure 1173, 4296 and TPO .
Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited to these examples.
In the present invention, the physical properties of the film were measured by the following method.
1) Luminance
BM7, and the standard was based on 3M BEFIII.
2) Strength
The diffuser sheet and the weight of a certain weight are placed on the prism sheet, and then the diffusion sheet and the weight are fixed. Next, pull the prism sheet at a right angle to the prism direction, and check the prism damage.
[Example 1]
The prepared prismatic resin was coated on a PET film and laminated so as to form an oxygen barrier and a prism shape using a prism-shaped mold. Then, ultraviolet light of a UV A region (light quantity: 1200 mJ / cm 2 ) was irradiated with a metal halide lamp, To thereby cure the prism resin. After that, the prism-shaped mold used is measured for luminance and intensity after releasing.
[Comparative Example 1]
The luminance and the intensity were measured in the same manner as in Example 1. [
The measurement results are shown in [Table 1] as follows.
As shown in Table 1, it can be seen that the resin composition for a prism sheet according to the present invention has a strength four times or more higher in a state where the brightness is maintained.
Claims (4)
Wherein the resin composition for a prism sheet has a brightness of 4000 cd / m 2 or more and a strength of 200 g or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130011157A KR20140098471A (en) | 2013-01-31 | 2013-01-31 | Prism sheet resin composition having an excellent elastic recovering property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130011157A KR20140098471A (en) | 2013-01-31 | 2013-01-31 | Prism sheet resin composition having an excellent elastic recovering property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20140098471A true KR20140098471A (en) | 2014-08-08 |
Family
ID=51745261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020130011157A KR20140098471A (en) | 2013-01-31 | 2013-01-31 | Prism sheet resin composition having an excellent elastic recovering property |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20140098471A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10472517B2 (en) | 2017-06-21 | 2019-11-12 | Hyundai Motor Company | Ultraviolet curable primer for radio-wave transmission cover of vehicle |
-
2013
- 2013-01-31 KR KR1020130011157A patent/KR20140098471A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10472517B2 (en) | 2017-06-21 | 2019-11-12 | Hyundai Motor Company | Ultraviolet curable primer for radio-wave transmission cover of vehicle |
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| Date | Code | Title | Description |
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| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |