KR102139462B1 - UV curable type acrylic resin composition for binding glass and molded article produced therefrom - Google Patents

Abstract

The present invention relates to an acrylic resin composition for UV-curable glass adhesion and a molded article produced therefrom that has significantly improved weatherability, excellent flexibility, elasticity, and excellent adhesion to a glass surface while simultaneously achieving high light transmittance.

Description

UV curable type acrylic resin composition for binding glass and molded article produced therefrom}

The present invention relates to an acrylic resin composition for UV-curable glass adhesion and a molded article produced therefrom that has significantly improved weatherability, excellent flexibility, elasticity, and excellent adhesion to a glass surface while simultaneously achieving high light transmittance.

The resin used for the transparent display board has a function of transmitting light emitted from a light source while adhering to a display board material such as glass and preventing scattering due to impact. Accordingly, it is located on the exterior wall of a billboard in a building, inside a display such as a TV or a smart device, or is applied to vehicle lighting, etc., and serves to spread light evenly. Since high transmittance is required, light loss should be small.

Generally, polymethyl methacrylate (PMMA) or PC (poly carbonate) has been used as a material applied to a transparent LED display board or a vehicle lamp. PMMA has high light transmittance in the visible light region, low birefringence, and excellent light resistance. However, there are disadvantages in that heat resistance and impact strength are poor and flexibility is required to implement various designs.

Recently, it has been attempted to apply an acrylic monomer as a material for a flexible display board having flexibility. However, there is a problem that the light transmittance is very low and the product reliability is poor due to unreacted monomers.

On the other hand, the silicone-based compound has excellent light resistance and heat resistance, and is relatively stable compared to the acrylic monomer, but is burdensome in terms of cost and has mechanical properties. In addition, epoxy or urethane resins are relatively economical, but have poor light resistance and heat resistance. In addition, when such an optical resin is used for filling a LED package having a complex and fine structure, bubbles may be generated due to heat during UV curing, and uneven scattering of LED light may occur due to bubbles.

Therefore, it is possible to realize excellent physical properties such as high transmittance of PMMA or more, while having excellent light resistance, heat resistance, and weather resistance, and it is easy to fill in a variety of complex and fine structures, and has excellent flexibility and elasticity. There is a need for research on materials for glass adhesion with improved physical properties such as impact resistance.

Korean Registered Patent No. 10-0512082 (2005.08.26.)

In order to solve the above problems, the present invention realizes high light transmittance even under severe conditions for a long time, has excellent weather resistance, heat resistance, light resistance and impact resistance, and is UV curable with excellent flexibility and elasticity compared to conventional rigid transparent display boards. It is an object to provide a resin composition for glass adhesion.

In addition, an object of the present invention is to provide a resin composition for glass adhesion having excellent viscosity properties without deteriorating physical properties to facilitate filling of complex and fine structures and improve workability.

In addition, an object of the present invention is to provide a molded body such as a transparent electronic display board having excellent durability, reliability, and economy that can be applied to various industrial fields, such as for building, outdoor, vehicle, and display interiors, by using the resin composition. .

One aspect of the present invention is a glass adhesive comprising a polyol oligomer (A), an acrylate monomer (B) and a photoinitiator (C) in which two or more alkylene oxide-added polyols are end-capped with a (meth)acrylate group. It is to provide an acrylic resin composition for.

In the acrylic resin composition for glass adhesion according to an embodiment of the present invention, the polyol-based oligomer (A) component is a urethane of a (meth)acrylate monomer having a polyether polyol and an isocyanate group to which two or more alkylene oxides are added It may be a reactant by binding.

In the acrylic resin composition for glass adhesion according to an embodiment of the present invention, the polyol to which the two or more alkylene oxides are added has a weight average molecular weight of 100 to 100,000 g/mol, and the terminal has a form of diol or triol. It may have.

In the acrylic resin composition for glass adhesion according to an embodiment of the present invention, the two or more alkylene oxides may include ethylene oxide and propylene oxide. At this time, the molar ratio of ethylene oxide and propylene oxide may be 3:7 to 9:1.

In the acrylic resin composition for glass adhesion according to an embodiment of the present invention, the (meth)acrylate monomer having the isocyanate group is any one or more selected from isocyanatoalkyl acrylate and isocyanatoalkyl methacrylate It can contain.

In the acrylic resin composition for glass adhesion according to an embodiment of the present invention, the acrylate monomer (B) is isobornyl acrylate, polycaprolactone acrylate, 2-hydroxyethyl acrylate, 2-hydroxymethyl acrylic Acrylate, 2-ethylhexyl acrylate, butyl acrylate, trimethylolpropane triacrylate, hexamethylene diacrylate, and pentaerythritol triacrylate.

In the ultraviolet-curable resin composition for glass adhesion according to an embodiment of the present invention, the resin composition is 0.5 to 35% by weight of a polyol-based oligomer (A), 60 to 99% by weight of an acrylate-based monomer (B) and a photoinitiator (C) ) 0.01 to 5% by weight.

The UV curable resin composition for glass adhesion according to an embodiment of the present invention may further include any one or more additives consisting of an antifoaming agent, an antioxidant, an ultraviolet absorber, a heat stabilizer, an antistatic agent, a flame retardant, a lubricant, and an impact modifier.

Another aspect of the present invention is to provide a molded body made from the resin composition described above.

The molded body according to an embodiment of the present invention has a thickness of 0.1mm to 10mm, and may have a transmittance of 90% or more in a visible light region.

The molded article according to an embodiment of the present invention may have a color difference value (ΔE) of 0.5 or less measured using a colorimeter under conditions exposed to ASTM G 155 for 3,000 hours.

The acrylic resin composition for glass adhesion according to the present invention is excellent in long-term durability and has high light transmittance, as well as excellent weatherability, heat resistance, light resistance and impact resistance, and excellent flexibility.

Particularly, as a molded body made from the resin composition according to the present invention, when filling a transparent substrate between glass substrates, shrinkage or expansion due to external environmental changes can prevent the expansion of remaining bubbles from occurring. , It is effective in removing air bubbles, and has an effect of preventing diffuse reflection by an external light source. Furthermore, it realizes excellent weather resistance, and does not generate cracks even when subjected to impact or bending, and has an effect of preventing scattering when damaged.

In addition, the molded article according to an aspect of the present invention can be applied to various industrial fields such as architectural, outdoor, vehicle, and display interiors, and can be manufactured in various designs with excellent flexibility, and has long-term reliability and economical advantages. have.

Hereinafter, the acrylic resin composition for glass adhesion of the present invention and the molded article prepared therefrom will be described in detail. However, the following specific examples or examples are only one reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

In addition, unless otherwise defined, all technical terms and scientific terms have the same meaning as those generally understood by those skilled in the art to which the present invention pertains, and the terms used in the description are only specific embodiments. It is intended to effectively describe and is not intended to limit the invention.

In addition, the singular form used in the specification and the appended claims may include a plurality of forms unless otherwise indicated in the context, and'comprises' and/or'comprising' includes other than the mentioned components. It does not exclude the presence or addition of components.

Further, in the present invention,'(meth)acrylate' is used as a general term for acrylate and methacrylate.

In general, as the thickness of the UV-curable resin composition becomes thicker, the UV irradiation does not uniformly penetrate deep into the composition, resulting in a low curing rate, and when exposed to light for a long time, the transmittance, color, and hardness change due to gradual photoaging. On the other hand, in the case of a transparent electronic display board, the thickness thereof is about 1 to 10 mm, and in the resin composition used in manufacturing, the degree of photocuring according to the thickness may be a major factor of physical properties. Accordingly, photocuring is performed by using a combination of initiators having various wavelength bands to increase the curing rate of the inside and the surface, or to increase light irradiation time or light irradiation with high energy. However, it is difficult to control the yellowing phenomenon caused by unstable radicals generated in unreacted molecules when the initiator content or light is irradiated. In addition, in addition to the photo-curing, it must have a high transmittance, the physical properties are not deteriorated even under severe conditions of high temperature and high humidity or external impact or warpage, and a resin composition for securing more improved physical properties in terms of realizing long-term physical property stability is required.

The inventors of the present invention reduce the content of the photoinitiator by providing a photocurable resin composition comprising a polyol oligomer end-capped with a (meth)acrylate group of two or more alkylene oxide-added groups and an acrylate monomer. Surprisingly, the present invention was completed by discovering that it is possible to dramatically increase the curing rate, reduce side reactions such as yellowing or oxidation, and improve light resistance, heat resistance, water resistance, and impact resistance.

One aspect of the present invention is an ultraviolet curable type comprising a polyol oligomer (A), an acrylate monomer (B) and a photoinitiator (C) end-capped a polyol to which two or more alkylene oxides are added with a (meth)acrylate group It relates to an acrylic resin composition for glass adhesion.

The polyol-based oligomer (A) is obtained by reacting a polyol to which two or more alkylene oxides are added and a monomer having a (meth)acrylate group to end-end the polyol with a (meth)acrylate group. In this case, the reaction is not particularly limited as long as it is a reaction capable of introducing a (meth)acrylate group at the end of the polyol-based oligomer, but can be carried out by any one or more reactions selected from urethane reactions, epoxy reactions, and ester reactions. . In one example, the polyol-based oligomer may be a secondary reactant that is end-capped with a (meth)acrylate by reacting a compound having a (meth)acrylate group on the modified polyol by modifying the hydroxyl group of the polyol with a urethane, epoxy, or ester reaction. have.

The polyol to which the two or more alkylene oxides are added may have a weight average molecular weight of 100 to 100,000 g/mol, preferably 1,000 to 50,000 g/mol, more preferably 3,000 to 30,000 g/mol, and the above range It is easy in workability and easy handling, and is effective in terms of improving water resistance, dimensional stability, and storage stability, but this is only one non-limiting example and is not limited by the above numerical range. At this time, the weight average molecular weight was measured using a water permeation (Waters) gel permeation chromatography (GPC) equipment. As an analytical column, Styragel HR from WATERS was used, styrene was used as a standard, HPLC-grade tetrahydrofuran (THF) was used as a mobile phase solvent, and the column heater temperature was 40°C and the mobile phase solvent flow rate was 1.0 mL/min. It was measured on condition.

The polyol to which the two or more alkylene oxides are added is not significantly limited in the number of terminal hydroxy groups, but may preferably have a diol or triol form. More preferably, it is more effective in the form of a diol in terms of preventing shrinkage of the molded body.

More preferably, the polyol-based oligomer may be a polyol-based compound that is a reactant of a (meth)acrylate monomer having an isocyanate group and a polyol to which two or more alkylene oxides are added. This is more effective in terms of increasing the curing rate of the resin composition and further improving the physical properties compared to the above-described secondary reactants. In this case, the curing rate means that the monomer in the composition is cured with a polymer, excluding the residual rate of unreacted monomer in the composition.

The polyol-based oligomer (A) may be a reactant of the polyol and a (meth)acrylate monomer having an isocyanate group, and these component ratios may be a molar ratio of hydroxy group and isocyanate before reaction within a range of 2:1 to 1:1. Can. The molar ratio range is effective in reducing unreacted monomers, but is not limited to the numerical range.

The (meth)acrylate monomer having the isocyanate group is an acrylate reaction linkage, but the type is not particularly limited, but is preferably selected from isocyanatoalkylacrylate and isocyanatoalkylmethacrylate. It can be one or more. At this time, the alkyl may be alkyl having 1 to 12 carbons, preferably alkyl having 1 to 6 carbons. In a more specific example, the (meth)acrylate monomer having the isocyanate group may be any one or more selected from isocyanatoethyl acrylate (AOI) and isocyanatoethyl methacrylate (MOI). have.

According to an aspect of the present invention, the polyol to which the two or more alkylene oxides are added is not significantly limited in alkylene oxide, but may preferably include ethylene oxide and propylene oxide. The polyol to which two or more alkylene oxides are added can dramatically improve the curing rate compared to a polyol having a single alkylene oxide, reduce unreacted monomers, and suppress side reactions such as yellowing or oxidation, and It is effective in terms of improving heat resistance. Furthermore, it is possible to reduce the content of the photoinitiator or shorten the light irradiation time, realize dimensional stability of the molded body, and maintain high reliability, which is more effective.

The polyol to which the two or more alkylene oxides are added has problems such as turbidity or deterioration of permeability due to yellowing phenomenon that may occur at a high temperature by controlling the mold release property of the molded body or lowering of water resistance. The molar ratio of two or more alkylene oxides contained may not be adjusted. In one aspect, when the two or more alkylene oxides are ethylene oxide and propylene oxide, the molar ratio of the ethylene oxide and propylene oxide can be adjusted. The molar ratio of the ethylene oxide and propylene oxide may be 3:7 to 9:1, specifically 5:5 to 8:2. It is effective in terms of increasing the hydrophilicity within the above range to improve the compatibility with moisture, and maintaining the transparency of the appearance of the molded article even after a long period of constant temperature and humidity test. In addition, the shape of the polyol itself is not solidified at room temperature, and the curing rate can be increased.

The polyol-based oligomer (A) component may be included in an amount of 0.5 to 35% by weight, preferably 1 to 20% by weight, and more preferably 2 to 10% by weight based on the total weight of the resin composition. In addition to implementing a high light transmittance within the above range, it is more effective in terms of having excellent light resistance, weather resistance, heat resistance, water resistance and impact resistance, and at the same time securing flexibility.

According to an aspect of the invention, the acrylate-based monomer (B) is 2-hydroxyethyl acrylate (HEA), 2-hydroxymethyl acrylate (HEMA), isobornyl acrylate (isobornyl acrylate, IBOA), Polycaprolactone acrylate, 2-ethylhexylacrylate (EHA), butylacrylate (BA), trimethylolpropane triacrylate (TMPTA), hexamethylene diacrylate (HDDA) and pentaerythritol tri It may include any one or more selected from the group consisting of acrylates (PETA), but is not limited thereto. Preferably it may be any one or more selected from 2-hydroxyethyl acrylate, isobornyl acrylate and polycaprolactone acrylate.

According to an aspect of the present invention, at the same time as the acrylate-based monomer may further include acrylic acid. This is effective in terms of further improving the desired physical properties, the content of which is within the scope of not impairing the object of the present invention

The acrylate-based monomer (B) may be included in the resin composition except for the polyol-based oligomer and the photoinitiator, and in consideration of additional additive components, preferably 60 to 99% by weight based on the total weight, preferably 65 to 97% by weight may be included. When the above range is satisfied, the curing rate can be increased, and it is more effective in terms of not only balancing desired physical properties but also securing long-term performance stability.

According to an aspect of the present invention, the photoinitiator (C) can be used without being greatly limited as long as it can initiate a polymerization reaction by generating radicals by light irradiation. Preferably, any one or more selected from benzoin-based, hydroxy-ketone-based, amino-ketone-based, and phosphine oxide-based compounds may be used, but is not limited thereto.

The photoinitiator (C) can achieve a sufficient crosslinking density, and its content can be adjusted to prevent yellowing of the final product or side effects due to heat generation during curing. The content of the photoinitiator may be 0.01 to 5% by weight, specifically 0.02 to 3% by weight, and more specifically 0.05 to 2% by weight. It is possible to implement a high curing rate compared to the photoinitiator content within the above range, and is effective in suppressing side reactions that may occur due to the initiator.

The acrylic resin composition for glass adhesion according to the present invention may further include an additive within a range in which the properties to be achieved are not deteriorated in order to further improve the properties. The additive may include any one or more of antioxidants, ultraviolet absorbers, thermal stabilizers, antistatic agents, flame retardants, lubricants and impact modifiers, but is not limited thereto.

The above-mentioned acrylic resin composition for glass adhesion may be cured by light irradiation. At this time, the light is not greatly limited, but may preferably be ultraviolet light. That is, the acrylic resin composition for glass adhesion may be ultraviolet curing type. The UV curing conditions are not limited, but may be 2,000 to 10,000 mJ/cm 2, preferably 4,000 to 8,000 mJ/cm 2.

Another aspect of the present invention is to provide a molded article prepared by curing the resin composition for glass adhesion described above, for example, a transparent electronic display board.

According to an aspect of the present invention, the transparent display board may be formed by being cured after being applied between glass or polymer films requiring high light transmittance. It does not have a significant deterioration in physical properties even when exposed to ultraviolet light for a long period of time, and has excellent optical properties as well as heat resistance, and has flexibility and elasticity, which makes it applicable to various designs. In addition, the substrate used in the transparent display board, that is, glass, as well as polyester, polypropylene, polyimide, etc. has excellent properties of adhesion to a polymer film.

In one aspect, the transparent electronic display board may be formed by forming an LED chipset on an indium tin oxide (ITO) substrate, filling the above-described acrylic resin composition for glass adhesion between the substrate and the cover glass, and curing the same. At this time, the transparent electric sign cured layer formed between the substrate and the cover glass has a level that satisfies the properties desired in the present invention as well as high transmittance. Particularly, a residual air layer, that is, bubbles may be present on the substrate on which the LED chipset is formed, and the resin composition according to the present invention can effectively suppress the bubble expansion phenomenon that may occur due to the bubbles, thereby providing excellent optical properties as well as water resistance. , It can stably secure physical properties such as light resistance, heat resistance, and impact resistance.

The thickness of the molded body is not particularly limited, but may preferably have a thickness of 0.1 mm to 10 mm. In addition, the molded body may have a transmittance of 90% or more in the visible light region.

According to an aspect of the present invention, the molded body may have a color difference value (ΔE) of 0.5 or less measured using a colorimeter under conditions exposed to ASTM G 155 at 60° C. for 3,000 hours. At the same time, ΔYI (yellow index) may be 0.5 or less, and Δhaze may be 0.5 or less.

(Equation) ΔE = (ΔL ² + Δa ² + Δb ² ) ^1/2

(In the above formula, L is the brightness index, a is the purity index, b is the contrast index.)

The molded article according to an embodiment of the present invention may have a cure rate of 90% or more indicating the degree of cure. This means that the residual ratio of unreacted monomer of 90% or more is less than 10%.

According to an aspect of the present invention, the molded body can be applied to various fields including outdoor and outdoor materials such as architectural interior and exterior materials, outdoor billboards, and large displays for image reproduction, vehicles, and display interiors. In particular, it is excellent in flexibility, and is not greatly limited in design design, and can realize physical properties such as excellent water resistance, light resistance, heat resistance, and impact resistance, and long-term reliability and economy.

Hereinafter, an acrylic resin composition for glass adhesion according to the present invention and a molded body manufactured using the same will be described in more detail through examples. However, the following examples are only one reference for explaining the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

(Production Example 1)

300 g of polyol (weight average molecular weight (MW): 5,000 g/mol) randomly added with a molar ratio of ethylene oxide (EO):propylene oxide (PO) of 8:2 to a jacketed 1L flask, isobornyl acrylate (IBOA) 100 g, 0.15 g of methylhydroquinone (MEHQ) as a polymerization inhibitor, 0.1 g of dibutyltin dilaurate (DBTDL (10% in toluene)) was added as a reaction catalyst, heated to 50° C., and then stirred. Thereafter, 16.94 g of karenz AOI (showa denco, Isocyanatoethyl acrylate) was uniformly dropped into the flask for arylation with the polyol at 50° C., followed by the same temperature for 30 minutes. After maintaining and standing still, the temperature was increased to 60° C. and further reacted for 2 hours to obtain a polyol-based oligomer end-capped with a light yellow transparent acrylate.

(Production Examples 2 to 5)

It was carried out in the same manner as in Production Example 1, to obtain a polyol-based oligomer end-capped with acrylate with the composition shown in Table 1 below.

[Table 1]

(Example 1)

As shown in Table 2, 0.3 g of polyol prepared above, 5 g of isobornyl acrylate (IBOA), 5 g of polycaprolactone acrylate (DICEL, FA-2D), 2-hydroxyethyl acrylate ( 2-HEA, 2-hydroxy ehtyl acrylate) 1g, IRGACURE 1173 (BASF, photoinitiator) 0.03g was added and stirred at 400°C at 35°C to prepare an acrylic resin composition for glass adhesion.

(Examples 2 to 4)

Prepared as in Example 1, the specimen was prepared using the component ratio as shown in Table 2 below.

(Comparative Example 1)

It was carried out in the same manner as in Example 1, except that the polyol of Preparation Example was added, except that IBOA 5g, FA-2D 4g, 2-HEA 1g, and IRGACURE 1173 0.03g were added.

(Comparative Example 2)

As shown in Table 2, it was carried out in the same manner as in Example 1, except that 2 g, IBOA 5 g, FA-2D 4 g, 2-HEA 1 g, and 0.03 g of IRGACURE 1173 prepared in Preparation Example 8 were added.

(Comparative Example 3)

It was carried out in the same manner as in Comparative Example 1, except that M2300 (Miwon Specialty Chemical, EO 30 mol parts diol) was replaced with 0.3 g instead of the polyol. .

[Table 2]

(evaluation)

Preparation of specimen

With two sheets of glass substrate for a transparent display board in which the top view type LED is soldered, the edges of the four corners between the glass are sealed with a simple adhesive tape. The resin composition prepared in Examples and Comparative Examples was slowly injected into the glass gap of 10 mm sealed with an adhesive tape so as not to cause bubbles, and after finishing the injection hole, this was irradiated with an ultraviolet irradiator at a light amount of 6000 mJ/cm 2 of a mercury high pressure lamp. Pass through to obtain a specimen in the form of a sandwich cured resin composition between the glass. The UV irradiator is a moving belt (6m/1min) type.

(1) Optical reliability

-Ultraviolet ray test: After leaving for 3000 hours in the ultraviolet ray tester under the condition of ASTM G-155 (60℃), take it out and check for color difference and damage of the glass specimen

-Color difference value (ΔE)

It was measured through a colorimeter (Spectrophotometer) (CM-5, Konica Minolta Co., Ltd.) and displayed as a color difference of the L*a*b* colorimeter in the KS A 0063 color difference display method. Basically, the color difference value is expressed by the following equation and is attributable to three values: L, a, and b.

(Equation) ΔE = (ΔL ² + Δa ² + Δb ² ) ^1/2

In the above equation, the L value is a numerical value of lightness difference, a and b are numerical values of red and yellow, respectively, and +a indicates a tendency of red, and toward -a indicates a tendency of green. +b is the numerical value of yellow tendency, and it is a concept of color coordinate that shows the tendency of blue as it goes toward -b. In particular, the b value on the color coordinate is a value related to yellow and is largely involved in the photoaging yellowing phenomenon of the acrylic resin observed with the naked eye.

-YI (YELLOW INDEX): Measure YI in the same way as color difference measurement.

-HAZE: Measure the HAZE value in the same way as for color difference measurement.

-Transmittance (TRANSMITTANCY): Transmittance is measured in the same way as color difference measurement.

(2) Physical reliability

-Outdoor stand-off test: After the LED was turned on, it was left for 168 hours in the open air, and then taken out and checked to see if there were bubbles in the resin between the all-optical glass plates.

-Constant temperature and humidity test: After leaving the LED on for 85 hours at 85°C and 85% in a constant temperature and humidity condition, take it out and check whether there are any abnormalities in the glass and resin. If there is no abnormality, ○, shrinkage, cracking or yellowing occurs. , When whitening occurs, it is denoted by ×.

-Thermal shock test: Using the thermal shock machine (HQ DT2-350) while the led is on, the program is set to maintain for 30 minutes at -40°C and 30 minutes at 80°C. It was checked whether it was normal, and if normal, ○, contraction, cracking, or yellowing occurred, it was denoted by ×.

[Table 3]

As shown in Table 3, it was confirmed that Examples 1 to 4 according to the present invention were excellent in heat resistance, light resistance, and water resistance even under severe conditions. This is expected to replace flexible display, architectural surface emitting lighting for buildings, and especially glass products for billboards with resins that must satisfy high demanding reliability by applying a curved design, and PMMA materials for indoor and outdoor lighting for vehicles. On the other hand, Comparative Example 1 did not use a polyol-based compound, and thus a high color difference value, a low curing rate, and whitening, yellowing, shrinkage, and cracking occurred. In Comparative Example 2, a polyol-based compound acrylated using AOI was not used, resulting in poor flexibility and cracking. In addition, it was confirmed that in the case of Comparative Example 3 using a polyol containing only alkylene oxide, whitening occurred, the curing rate was lowered, and light resistance and heat resistance were lowered.

Although the present invention has been described through specific matters and limited embodiments as described above, it is provided only to help a more comprehensive understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention pertains Those skilled in the art can make various modifications and variations from these descriptions.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and should not be determined, and all claims that are equivalent or equivalent to the scope of the claims as well as the claims described below belong to the scope of the spirit of the invention. .

Claims (12)

Polyol-based oligomer (A) which is a reactant of a (meth)acrylate monomer having a polyol and an isocyanate group to which two or more alkylene oxides are added,
Acrylate monomers (B), and
As an acrylic resin composition for glass adhesion comprising a photoinitiator (C),
The molded article prepared by curing the resin composition has a curing rate of 90% or more, a transmittance of 90% or more in a visible light region based on a thickness of 10 mm, and conditions exposed to ASTM G 155 at 60°C for 3000 hours. The color difference value (ΔE), ΔYI, and ΔHAZE measured using a color difference meter in the acrylic resin composition for glass adhesion.
delete According to claim 1,
The two or more alkylene oxide-added polyol is an acrylic resin composition for glass adhesion having a weight average molecular weight of 100 to 100,000g/mol.
According to claim 1,
The two or more alkylene oxide is an acrylic resin composition for glass adhesion comprising ethylene oxide and propylene oxide.
According to claim 4,
The molar ratio of ethylene oxide and propylene oxide is 3:7 to 9:1 acrylic resin composition for glass adhesion.
According to claim 1,
The (meth)acrylate monomer having the isocyanate group is an acrylic resin composition for glass adhesion comprising at least one selected from isocyanatoalkylacrylate and isocyanatoalkylmethacrylate.
According to claim 1,
The acrylate-based monomer (B) is isobornyl acrylate, polycaprolactone acrylate, 2-hydroxyethyl acrylate, 2-hydroxymethyl acrylate, 2-ethylhexyl acrylate, butyl acrylate, trimethylolpropane An acrylic resin composition for glass adhesion comprising at least one selected from the group consisting of triacrylate, hexamethylene diacrylate and pentaerythritol triacrylate.
According to claim 1,
The resin composition is a polyol-based oligomer (A) 0.5 to 35% by weight, an acrylate-based monomer (B) 60 to 99% by weight and a photoinitiator (C) 0.01 to 5% by weight of acrylic resin composition for glass adhesion.
According to claim 1,
The resin composition is an acrylic resin composition for glass adhesion further comprising any one or more additives consisting of an antifoaming agent, antioxidant, ultraviolet absorber, heat stabilizer, antistatic agent, flame retardant, lubricant and impact modifier.
A molded article prepared by curing the resin composition of any one of claims 1 and 3 to 9,
The molded body has a curing rate of 90% or more, a transmittance of 90% or more in a visible light region based on a thickness of 10 mm, and is measured using a colorimeter under conditions exposed to ASTM G 155 at 60°C for 3000 hours. A molded body having one color difference value (ΔE), ΔYI, and ΔHAZE of 0.5 or less.
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