ADHESIVE COMPOSITION FOR OPTICAL USE

Advantages and features of the present invention, achieve the reference method and an electronic component in the embodiment carry the activitycopyright will however, in the present invention refers to hereinafter is limited to disclosure in the embodiment are different but may be implemented in various forms which, in the embodiment of the present invention disclosure are complete and can be utilized for only the, in person with skill in the art of the invention the present invention is provided to a target number for confirming button to complete ball which categories, defined by category of the present invention refers to claim only disclosed. Throughout the specification the same references refer to the same components.

Drawing the different layers in order by increasing a thickness and area unambiguously shown. In the drawing, for facilitating descriptions to, the thickness of several layers and the region shown exaggerated.

In addition, the layer in a specification, film, region, such as "on" or "upper" portion of a synthetic resin plate when it, "directly on" as well as any other portion when intermediate when another portion comprises a unit. Some parts which are "directly on" when it opposite intermediate free portion and a portion of motor vehicle is started substrate. In addition, layer, film, region, such as "below" or "lower" portion of a synthetic resin plate when it, "beneath" as well as any other portion when intermediate when another portion comprises a unit. Some parts which are opposite "beneath" when it without other parts intermediate the motor vehicle is started substrate.

The specification (meta) acrylate is big in said acrylate or methacrylate.

One embodiment of the present invention prepared and a polyfunctional urethane (meth) acrylate urethane (meth) acrylate oligomer employed and oligomer, said urethane (meth) acrylate oligomer prepared polyfunctional urethane (meth) acrylate oligomer employed for said weight ratio 1:2 to 1:4 in optical adhesive composition number [...] substrate.

In the specification, (meta) acrylate oligomer prepared one (meta) acrylic urethane employed for said [me column means including oligomer can be in a specific proportion. Specifically, the [ley sprouting, (meta) acrylic and said one double bond, said double bond radical to yield, a crosslinked structure can be formed like different monomers or dimers.

Said urethane (meth) acrylate oligomer prepared photocuring reaction employed for one side of number by the number of participating functional, 2 functional or more polyfunctional urethane (meth) acrylate oligomer serves as compared said photocurable adhesive composition can be reduced curing shrinkage rate, and photocurable adhesive composition for decreasing the viscosity of the potentiating effect can be applied from the implement.

One embodiment of the present invention according to the state, said urethane (meth) acrylate oligomer polybutadiene urethane (meth) acrylate oligomer prepared employed, epoxy urethane (meth) acrylate oligomer, polyester urethane (meth) acrylate oligomer, and polyether urethane (meth) acrylate oligomers can be one or more selected from the group consisting.

One embodiment of the present invention according to the state, said urethane (meth) acrylate oligomer (Mw) weight average molecular weight of about 10,000 g/mol prepared employed for implementation being from about 20,000 g/mol. Said urethane (meth) acrylate oligomer prepared by maintaining said range employed for a weight average molecular weight, while maintaining an appropriate viscosity, effectively reducing the curing shrinkage rate can be, prone effect hereinafter for implementing and viscosity of having a latticed properties can be secured. Said urethane (meta) acrylate oligomer prepared weight average molecular weight of less than said range when employed, on molding difficulties can be too previously, door number occurs in curing shrinkage rate can be increased. Said urethane (meth) acrylate oligomer prepared a weight average molecular weight greater than said range when employed, curing shrinkage may cause a decrease in local and, viscosity of magnets is difficult door number number and adhesion thereof can.

One embodiment of the present invention according to the state, said urethane (meth) acrylate oligomer as well as prepared for optical adhesive composition employed, polyfunctional urethane (meth) acrylate oligomer comprising [...].

One embodiment of the present invention according to the state, said polyfunctional urethane (meth) acrylate oligomer (meta) acrylic in a specific proportion [me column means including at least two oligomer can be, for example, the urethane (meth) acrylate functional oligomer be 2 to 4 functional monomeric units.

Said polyfunctional urethane (meth) acrylate oligomer, said photocurable adhesive composition upon curing shrinkage implements excellent durability and hardness, adhesion and viscosity control can be applied from the securing effect.

One embodiment of the present invention according to the state, said polyfunctional urethane (meth) acrylate oligomer polybutadiene urethane (meth) acrylate oligomer, epoxy urethane (meth) acrylate oligomer, polyester urethane (meth) acrylate oligomer, and polyether urethane (meth) acrylate oligomers can be one or more selected from the group consisting.

One embodiment of the present invention according to the state, said polyfunctional urethane (meth) acrylate oligomer (Mw) weight average molecular weight about 40,000 g/mol to about 30,000 g/mol implementation being. Said polyfunctional urethane (meth) acrylate oligomer by maintaining said weight average molecular weight range, excellent hardness and durability when cured can be, improved adhesive properties and viscosity to easily control can be near a floor. Said polyfunctional urethane (meth) acrylate oligomer when a weight average molecular weight greater than or less than said range, said optical adhesive composition when applied to a finished article after curing, depending on external shocks or weakened so tensile strength and elastic deformation can be, durability may cause a decrease in disclosed.

As aforementioned, said optical adhesive composition employed (meta) acrylate oligomer prepared polyfunctional urethane (meth) acrylate oligomer containing urethane with a horizontal, adhesive, curing shrinkage polarity can be implementing mitigation of solution properties.

Said optical adhesive composition prepared (meta) acrylate oligomer only when said urethane employed including, on said optical adhesive the viscosity of the composition is too low molding difficulties can be, adhesion reliability siberian bustard disagreement can be difficult to control number is lowered, door number can be reduced hardness and tensile force is generated.

As well as, said polyfunctional urethane (meth) acrylate oligomer including only when said optical adhesive composition, curing shrinkage and is too high optical adhesive composition can be applied as a source number article, don't hardness according to external temperature and which has been modified by lowering the door number occurs adhesion can be generated.

One embodiment of the present invention according to the state, said optical adhesive composition prepared (meta) acrylate oligomer polyfunctional urethane (meth) acrylate urethane employed for said said weight ratio 1:2 to 1:4 oligomer implementation being. Specifically, said optical adhesive composition prepared (meta) acrylate oligomer said polyfunctional urethane (meth) acrylate oligomer urethane employed for said weight ratio 1:2 to 1:35 or implementation being 1:3 to 1:2.

Said polyfunctional urethane (meth) acrylate urethane (meth) acrylate oligomer and polymer compositions prepared said weight ratio from said stabilized in the mixed, appropriate curing shrinkage upon cure hardness and durability can be simultaneously implementing a low resistance.

Said polyfunctional urethane (meth) acrylate urethane (meth) acrylate oligomer and polymer compositions prepared said oligomer its amount is said range, curing shrinkage and can be increased, the deterioration of physical properties and viscosity number can be difficult door number occurs adhesive magnets. As well as, may cause a decrease in mechanical properties such as hardness and durability and upon curing, curing shrinkage deformation door number is generated according to number article can be increased.

One embodiment of the present invention according to the state, said urethane (meth) acrylate oligomer and a polyfunctional urethane (meth) acrylate polymer compositions prepared oligomer 9 weight % to about 30% by weight of said adhesive composition for optical use the overall content about implementation being. Specifically, employed for urethane (meth) acrylate oligomer and a polyfunctional urethane (meth) acrylate prepared said oligomer 15 weight % to about 30% by weight of said adhesive composition for optical use about the overall content, or about 20 weight % to about 25% by weight implementation being.

Urethane (meth) acrylate oligomer and a polyfunctional urethane (meth) acrylate prepared said employed total oligomer content by maintaining said range, binding reaction upon curing functional group participating cures can be reducing the number number shrinkage, tensile strength properties can be implementing effect having a latticed structure. Urethane (meth) acrylate oligomer and a polyfunctional urethane (meth) acrylate prepared said employed total oligomer content less than said range when, as a decrease in strength and durability and surface upon curing, curing shrinkage or directions for obtaining mechanical properties and hardness number occurs as the door, said optical adhesive the viscosity of the composition is too low circular can be difficulties. Urethane (meth) acrylate oligomer and a polyfunctional urethane (meth) acrylate prepared said employed total oligomer content greater than said range when, curing shrinkage number increase in adhesive force and hardness magnets difficult, too high viscosity can be generated difficulties.

One embodiment of the present invention according to the state, said optical adhesive composition further comprises amino acids containing hydroxyl (meth) acrylate monomer can be.

(Meta) acrylate monomer containing hydroxyl said included in said optical adhesive composition of a slower reaction rate, the rate at which said optical adhesive composition can be an encapsulating gastric, curing shrinkage and low resistance as well as an easy to carry, said optical adhesive composition can be injects stability properties.

Specifically, slow relative-reactive amino acids containing hydroxyl (meta) acrylate monomer generally less reactive acrylate monomer using photocuring reaction speed control of said optical adhesive composition as compared to the deformation and dimensional stability for thermally processing hereinafter billion number implement can be advantageous.

Thus, curing said adhesive composition for optical deinterleaver rearranges each photocuring reaction when performing curing degree with respect to a multi-stage curing method is hereinafter for applying reduce further the shrinkage can be cured, after said optical adhesive composition applied stresses comprises a transformation of a number can be prevented.

One embodiment of the present invention according to the state, said 2 - hydroxyethyl (meth) acrylate (meta) acrylate monomer containing hydroxyl, 4 - hydroxy butyl (meth) acrylate, 2 - hydroxypropyl (meta) acrylate, 4 - hydroxy butyl (meth) acrylate, 6 - hydroxy hexyl (meta) acrylate, 8 - hydroxy octyl (meta) acrylate, (meta) acrylate and 2 - hydroxy 2 - hydroxy ethylene glycol (meth) acrylate to form propylene glycol can be one or more selected from the group consisting.

One embodiment of the present invention according to the state, said acrylate monomer containing hydroxyl (meta) 3% by weight to 8% by weight of the content of said optical adhesive composition for implementation being. Specifically, one embodiment of the present invention according to the state, said acrylate monomer containing hydroxyl (meta) 4% by weight to 7% by weight of the content of said optical adhesive composition for implementation being

Amino acids containing hydroxyl (meta) acrylate monomer % weight of said range said range by maintaining, by establishing an appropriate viscosity to impart improved formability in curing shrinkage rate can be implementing low enough level, hereinafter for excellent optical properties can be output. Further, said amino acids containing hydroxyl (meta) acrylate monomer weight % range by maintaining said range, can effectively prevent white turbidity, excellent properties can be long. Amino acids containing hydroxyl (meta) acrylate monomer less than % weight of said range when said range, curing shrinkage upon cure 2 difference can be increased and, after curing in solid white turbidity can be delamination occurs. Amino acids containing hydroxyl (meta) acrylate monomer % greater than said range when the weight of said range, said optical adhesive composition when cured, can be the group, can be generated clouding in liquid phase prior to curing.

One embodiment of the present invention according to the state, said optical adhesive composition containing alkyl (meta) acrylate monomer containing a cycloalkyl (meth) acrylate monomer and further comprises one or more can be selected from the group consisting. Specifically, one embodiment of the present invention according to the state, said optical adhesive composition containing a cycloalkyl (meth) acrylate monomer can be further comprises.

One embodiment of the present invention according to the state, said alkyl group containing 1 to 20 carbon atoms (meta) acrylate monomer (meta) acrylate having alkyl group can be. Specifically, said (meth) acrylate monomer (meta) acrylate methyl, ethyl (meta) acrylate, n - propyl (meta) acrylate, isopropyl (meth) acrylate, n - butyl (meth) acrylate, butyl (meth) acrylate t -, sec - butyl (meth) acrylate, neopentyl (meta) acrylate, 2 - ethylhexyl (meth) acrylate, 2 - ethyl butyl (meth) acrylate, n - octyl (meta) acrylate, octyl isocyanate (meta) acrylate, ISO the meta arc relay [thu which will stroll, the meta arc relay [thu which it will soak and 2 in the meta arc relay [thu which will be burnt can be one or more selected from the group consisting.

One embodiment of the present invention according to the state, said cyclo-alkyl functional group in the unsaturated bond does not exist can be a carbon structure can be, 2 to 20 carbon atoms (polycyclic ring) can be a single ring (monocyclic ring) or multiple ring.

One embodiment of the present invention according to the state, said cycloalkyl [...] (meta) acrylate monomer containing a cycloalkyl (CHA), cyclo [...] (CHMA), step neel arc relay [thu isocyanate (IBOA), isocyanate (IBOMA) and step neel meta [khu relay [thu 1 species selected from the group consisting of 3, 3, 5 - tri methyl hour claw [heyk thread arc relay [thu (TMCHA, 3, 3, 5 a-trimethylcyclohexylacrylate) can be more.

One embodiment of the present invention according to the state, said optical adhesive composition containing (meta) acrylate monomer containing a cycloalkyl said alkyl (meta) acrylate monomer content and said about 20 weight % to about 40% by weight respectively said optical adhesive composition, or about 20% by weight to 35% by weight, or 20% or more by weight 30 weight % hereinafter implementation being.

Said alkyl (meth) acrylate monomer containing acrylate monomer and/or cyclo-alkyl containing (meta) when said content of the range, the viscosity of said aqueous adhesive composition for optical use can easily to handle for a hereinafter, said optical adhesive composition can improve heat resistance and high temperature adhesion serves.

One embodiment of the present invention according to the state, said (meth) acrylate monomer with said optical adhesive composition containing hydroxyl, alkyl (meth) acrylate monomer and/or cyclo-alkyl containing (meth) acrylate containing said monomers can be.

One embodiment of the present invention according to the state, said adhesive composition for optical use plasticizer number, adhesive enhancing number, and optical disclosure number 1 further comprises at least one selected from the group consisting of addition of number can be, the one number are not disclosed.

Polyfunctional urethane (meth) acrylate oligomer to said optical adhesive composition, curing shrinkage increased too much equipment disclosed. The number said plasticizer further comprises said optical adhesive composition curing shrinkage can be said low resistance, viscosity of implementing effect can be easy.

One embodiment of the present invention according to the state, said plasticizer is epoxy plasticizer number number, number fatty acid ester-based plasticizer, polyester plasticizer number, poly father hit diene orgin plasticizer number, and ether-based plasticizer selected from the group consisting of comprising at least one number to one number but are not disclosed.

One embodiment of the present invention according to the state, the content of about 10% by weight plasticizer said number said optical adhesive composition from about 20% by weight implementation being. Specifically, the content of about 15% by weight plasticizer said number said optical adhesive composition from about 20% by weight implementation being. By maintaining said content of said plasticizer number range, after said optical adhesive composition applied to the article number (migration) plasticizer can be preventing transition number, excellent adhesive, excellent external appearance and long-term uniform performance advantages can be implementing the measurement device, embodying gradation wetness (wetting) can be improved, viscosity of can be easy. When the content of said plasticizer number less than said range, said optical adhesive composition is generated by such a shrinkage when cured and may cause a decrease in dimensional stability, viscosity of the surface has a small portable wettability when the package is filled with a number of laminated after bubble door can. Said plasticizer content of said range when said optical adhesive composition number greater than number article number (migration) is then applied at a transition can be inclined surfaces, viscosity is too high or too low wettability after laminated when a portable, overflow and the like can be filled with a door number is generated.

Said adhesive enhancing adhesion and to act as a number is improving, increasing tacking said number include rosin ester resin, C₅ Based petroleum resin, C₉ Based petroleum resin, and risk of resin can be selected from one or more.

Said optical adhesive formulations could be bonded display device sprayable compositions disclosed.

When reference also 1, Image display device (100) includes a photo-curing adhesive layer including said adhesive composition for optical use cargo (130) Image display unit (110) and guard (120) can be disposed between the structure. Said Image display section (110) (Liquid Crystal Display, LCD) comprises a liquid crystal display device may be, e.g., said Image display section (110) can be a polarizing film on the uppermost vice-layer, the number is not one. In addition, said guard (120) includes a glass substrate or, can be a transparent plastic substrate, the one number are not disclosed. Said guard (120) circular light shielding part (121) can be formed.

Further, said Image display device (100) includes said guard (120) such as fastening jig (140) further include disapproval. Said fixing jig (140) can be publicly known in the art no kind using, not limited particularly.

Said optical adhesive composition including multi-stage curing said photo-curing adhesive composition for optical use cargo can be implemented by adhesive.

Figure 2 shows a process flow of the present invention in one embodiment is an aqueous adhesive composition for optical use of multi-stage curing also according to method to determine the exhibits.

Said optical adhesive composition is an aqueous adhesive composition for optical parts and second stage curing method applying said (S1); 1 difference applied is an aqueous adhesive composition for optical use (S2) forming the photocuring adhesive number; said guard on top of the adhesive to the adhesive number (S3); and said Image display and said adhesive layer is interposed between the guard of a photocuring adhesive number 2 (S4) forming said difference; can be a.

Said multi-stage curing method for example, tea and mixed with curing two-stage curing method 1 2 implementation being. Said optical adhesive composition when performing multiple curing can be controlled for each photocuring reaction degree hereinafter cured by applying multi-stage curing method can reduce further the shrinkage photocuring...copyright 2001.

As well as, preventing overflow through said multi-stage curing method for replenishing the material, time and costs reduced diameter and excellent productivity and photocuring shrinkage embodying gradation number is not significantly more circuit pattern by the blade unit can be implementing long-term uniform adhesive performance.

Said optical adhesive composition filler 1 stage 2 difference photocuring-shrinkage shrinkage and photocuring difference can.

Specifically, by photocuring shrinkage diameter 1 cm height difference photocuring said 1 1 1 mm difference applying said adhesive composition of a lower circular frame for optical wavelength 365 nm LED (LED) lamp irradiating the composition when the difference of the height of the height difference when using an encapsulating SENTECH [...] EU201 1 were measured. Said 1 difference photocuring shrinkage may be about 4% hereinafter, e.g. in addition, about 3% to about 4% implementation being.

As well as, said 2 by photocuring shrinkage diameter 1 cm height difference difference photocuring 2 1 mm mercury lamp (mercury lamp) applying an aqueous adhesive composition for optical use circular frame using said lower after photocuring, composition when the height difference of the height of the mercury device by photocuring of using SENTECH [...] EU201 were measured. Said 2 difference photocuring shrinkage is about 4. 5% hereinafter may be, e.g. in addition, about 3. 5% to about 4. Implementation being 5%.

The specification 2 1 contrast in the photocuring shrinkage difference photocuring shrinkage difference photocuring shrinkage as the difference, about 1. 0% hereinafter may be, in addition e.g., about 0. 1 to about 5%. 0%, or about 0. 0 to about 5%. Implementation being 9%.

Said photocuring shrinkage in the range of said optical adhesive composition by having said low photocuring shrinkage number article applied remove more but not more than the aforementioned number as can be reducing the content of plasticizer, can be implementing excellent external appearance and long-term uniform adhesive performance. Said range said photocuring shrinkage, increased to remove the circuit pattern, yellowing or the can be generated.

In the embodiment of the present invention hereinafter are etched in the specific number. But, for the present invention are described in the embodiment to explain the example specifically or to which only, since the present invention is number one other WD immediately after being turned off.

<In the embodiment and Comparison example>

In the embodiment 1

Step neel arc relay [thu isocyanate 27 weight %, 2 weight % isocyanate step neel meta [khu relay [thu, prepared [...] employed for urethane oligomer (NS017, Mw: about 17,000, [...] BNTM) 5. 5% by weight, 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 15. 5% by weight, 30% by weight adhesive enhancing number (ARAKAWA chemical, P-a 90), 15% by weight plasticizer number (non a-phthalates, BASF, DINCH), hydroxy butyl acrylate (Osaka organic chemical [...]) 4 weight % and optical disclosure number number of other added including, and a polyfunctional urethane [...] oligomer 21 weight % total content prepared urethane [...] oligomer employed in high pressure liquid coolant is an aqueous adhesive composition for optical use his number.

In the embodiment 2

ISO step neel arc relay [thu 20. 5% by weight, 6% by weight urethane polymer compositions prepared [...] oligomer (NS017, Mw: about 17,000, [...] BNTM), 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 7 weight %, 10 weight % 4 functional urethane [...] oligomer (KS1122, LG CHEM), adhesive enhancing number (ARAKAWA chemical, P-a 90) 30% by weight, number 18 weight % plasticizer (non a-phthalates, BASF, DINCH), hydroxy butyl acrylate (Osaka organic chemical [...]) 7% by weight of other added including disclosure number and number, total content 23% by weight urethane [...] oligomer and a polyfunctional urethane [...] oligomer prepared ability of said light is an aqueous adhesive composition number was high pressure liquid coolant.

Comparison example 1

Step neel arc relay [thu 25 weight % isocyanate, step neel meta [khu relay [thu 2% by weight of isocyanate, 4% by weight urethane polymer compositions prepared [...] oligomer (NS017, Mw: about 17,000, [...] BNTM), 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 16% by weight, adhesive enhancing number (ARAKAWA chemical, P-a 90) 32 weight %, 16% by weight plasticizer number (non a-phthalates, BASF, DINCH), hydroxy butyl acrylate (Osaka organic chemical [...]) 4 weight % and optical disclosure number including number of other added, total content 20% by weight and a polyfunctional urethane [...] oligomer prepared urethane [...] oligomer employed in high pressure liquid coolant is an aqueous adhesive composition for optical use his number.

Comparison example 2

Step neel arc relay [thu isocyanate 15% by weight, 2% by weight isocyanate step neel meta [khu relay [thu, 17% by weight urethane polymer compositions prepared [...] oligomer (NS017, Mw: about 17,000, [...] BNTM), 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 3% by weight, 40% by weight adhesive enhancing number (ARAKAWA chemical, P-a 90), number (non a-phthalates, BASF, DINCH) 18% by weight plasticizer, hydroxy butyl acrylate (Osaka organic chemical [...]) 4 weight % and optical disclosure number including number of other added, total content 20% by weight and a polyfunctional urethane [...] oligomer prepared urethane [...] oligomer employed in high pressure liquid coolant is an aqueous adhesive composition for optical use his number.

Comparison example 3

Step neel arc relay [thu 25 weight % isocyanate, isocyanate 4 step neel meta [khu relay [thu% by weight, 20% by weight urethane polymer compositions prepared [...] oligomer (NS017, Mw: about 17,000, [...] BNTM), adhesive enhancing number (ARAKAWA chemical, P-a 90) 30% by weight, 15% by weight plasticizer number (non a-phthalates, BASF, DINCH), hydroxy butyl acrylate (Osaka organic chemical [...]) 4% by weight of a high pressure liquid coolant is an aqueous adhesive composition for optical use number was added including other disclosure number and number.

Comparison example 4

Step neel arc relay [thu 24% by weight of isocyanate, isocyanate step neel meta [khu relay [thu 4. 5% by weight, 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 27% by weight, 20% by weight adhesive enhancing number (ARAKAWA chemical, P-a 90), number (non a-phthalates, BASF, DINCH) 12% by weight plasticizer, hydroxy butyl acrylate (Osaka organic chemical [...]) 4% by weight of a high pressure liquid coolant is an aqueous adhesive composition for optical use number was added including other disclosure number and number.

Comparison example 5

ISO step neel arc relay [thu 21. 5% by weight, 8% by weight urethane polymer compositions prepared [...] oligomer (NS017, Mw: about 17,000, [...] BNTM), 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 15% by weight, adhesive enhancing number (ARAKAWA chemical, P-a 90) 28% by weight, plasticizer number (non a-phthalates, BASF, DINCH) 18. 5% by weight of other added disclosure number and number, said total content 23% by weight urethane [...] oligomer and a polyfunctional urethane [...] oligomer prepared employed in high pressure liquid coolant is an aqueous adhesive composition for optical use his number.

Comparison example 6

Step neel arc relay [thu 18 weight % isocyanate, isocyanate step neel meta [khu relay [thu 4. 5% by weight, 5% by weight urethane polymer compositions prepared [...] oligomer (NS017 Mw: about 17,000, [...] BNTM), 2 functional urethane [...] oligomer (KS950, Mw: about 25,000, LG CHEM) 15% by weight, adhesive enhancing number (ARAKAWA chemical, P-a 90) 28% by weight, 15% by weight of plasticizer (non a-phthalates, BASF, DINCH) number by adding other disclosure number and number, said total content 20% by weight and a polyfunctional urethane [...] oligomer prepared urethane [...] oligomer employed in high pressure liquid coolant is an aqueous adhesive composition for optical use his number.

Comparison example 7

Step neel arc relay [thu 25 weight % isocyanate, 2 functional urethane [...] oligomer (KS1113, Mw: about 37,000, LG CHEM) 36% by weight, 15% by weight adhesive enhancing number (ARAKAWA chemical, P-a 90), number 9 weight % plasticizer (non a-phthalates, BASF, DINCH) including a number of other added an aqueous adhesive composition for optical use his number disclosure number and high pressure liquid coolant.

<Evaluation>

Experiment example1: 1 difference photocuring shrinkage

Said in the embodiment and comparison example 1 cm height 1 mm diameter circular frame number by each adhesive composition for optical produced therewith applying 100 mW/cm using lower LED lamp (LED lamp)² And illumination of 500 mJ/cm² UV quantity by the composition when the contrast difference height of 1 1 when using an encapsulating [...] EU201 SENTECH height difference difference of measured, using formula 1 1 difference photocuring shrinkage the bill.

<식 1>

1 difference photocuring shrinkage of volume/volume × 100 (%)=1 difference photocuring of optical adhesive composition

Experiment example2: 2 difference photocuring shrinkage

Said in the embodiment and comparison example 1 cm height 1 mm diameter circular frame number by each adhesive composition for optical produced therewith applying 250 mW/cm using lower mercury lamp (mercury lamp)² And illumination of 6000 mJ/cm² 2 UV quantity by the difference of height of contrast after photocuring composition when measured using a height difference of 2 difference photocuring SENTECH [...] EU201, using formula 2 2 difference photocuring shrinkage the bill.

<식 2>

2 difference volume/volume of adhesive composition for optical use photocuring shrinkage=2 × 100 (%) difference of photocuring

Experiment example 3: White turbidity evaluation

Said in the embodiment and comparison example is an aqueous adhesive composition for optical use prepared by the number by each lower 8 cm X 14 cm X 0. After applying the LED lamp (LED lamp) 11 cm glass thickness about 150um using 100 mW/cm² And illumination of 500 mJ/cm² UV quantity by the difference after photocuring 1, 8 cm X 14 cm X 0 on top. (Mercury lamp) using mercury lamp covers 250 mW/cm 11 cm glass² And illumination of 6000 mJ/cm² 2 UV quantity by the difference after photocuring, pakage aircon (85 °C/85% RH) 10 to liver after incubation haze meter (Haze guard plus, BYK [...]) haze value using measuring substrate. Measurements can comprise a high low, white turbidity measurements through determining whether or not the substrate. (0. 5 if less than, without white turbidity judges that the other.)

Experiment example 4: Viscosity evaluation

Said in the embodiment and comparison example by each optical adhesive composition is prepared by the number 0. 5 ml of 25 °C [...] DV2T Viscometer Brookfield viscosity after application to remove the unique using in a long time.

Experiment example 5: Hardness evaluation

Said in the embodiment and comparison example adhesive composition for optical use prepared by the number by each 20 mm diameter, 5 mm height of the structure after filler having an Asker-C sclerometer won applied using hardness at room temperature were measured.

In the embodiment 1 and 2 number prepared by the optical adhesive composition according 1 2 and 4 each photocuring shrinkage difference photocuring shrinkage and 4% difference. 5% hereinafter maintain suitable levels, in particular 2 1 0 each photocuring shrinkage difference photocuring shrinkage contrast difference is kept constant. 84% and 0. Information according to 52%, the number is hardly deformed after photocuring implementing excellent article can be highly reliable and enduring. As well as, in the embodiment 1 and 2 number prepared by the optical adhesive composition according each haze values 0. 06 and 0. 07 information according to, no white turbidity phenomenon is also used for excellent visibility can be.

While, in the case of comparison example 1 to 4, 1 1 2 difference photocuring shrinkage contrast difference photocuring shrinkage is kept constant. And the subsequent number exceeds 3% modified article is bigger, may cause a decrease in dimensional stability can confirm it. In the case of comparison example 5, 1 2 difference photocuring shrinkage contrast difference photocuring shrinkage is constructed to be 0. 51% and very low piece or haze values 1. 64 and the second white turbidity can be established to identify visibility. In the case of comparison example 6, 2 functional urethane acrylate oligomer (Mw) weight average molecular weight of less than 30,000 is provided when the liquid viscosity of difficulties, the cannot be further experiments as a file. In the case of comparison example 7, polyfunctional urethane acrylate oligomer exhibits, urethane acrylate oligomer too high total content, viscosity and hardness as a further experiments cannot be excessively raised from outside.