KR102075196B1 - Adhesive laminate having water vapor barrier properties and image display device - Google Patents

Abstract

The adhesive vapor barrier laminate includes a substrate and a pressure-sensitive adhesive layer formed on the substrate, wherein the pressure-sensitive adhesive layer is (A) hydrogenated block copolymer and (B) first commercially available. And (C) a pressure-sensitive adhesive composition containing a second compatible agent, wherein the (A) hydrogenated block copolymer is derived from a hard segment derived from a polymer component of an aromatic vinyl monomer and a polymer component of a conjugated diene monomer. It has a soft segment, the said (B) 1st compatibilizer has the property to be compatible with the said hard segment, and has a softening point of 80 degreeC or more, and the said (C) 2nd compatibilizer is compatible with the said soft segment. It has a property, it is a liquid at normal temperature (23 degreeC), the film thickness of the said adhesive layer is 5 micrometers or more and 300 micrometers or less, and the water vapor transmission rate when the film thickness of this adhesive layer is 50 micrometers is JIS Z. It is less than 100 g / m <2> * day in 0208 and 40 degreeC * 90% RH.

Description

Adhesive vapor barrier laminate and image display device {ADHESIVE LAMINATE HAVING WATER VAPOR BARRIER PROPERTIES AND IMAGE DISPLAY DEVICE}

The present invention relates to an adhesive vapor barrier laminate and an image display device.

In manufacture of image display apparatuses, such as an organic electroluminescent apparatus, and a solar cell using an organic thin film, in recent years, the adhesive composition is used when bonding a structural member together.

However, since the organic film which comprises these apparatuses is weak to moisture, in order to maintain the function of the organic layer, it is necessary to take measures to prevent the permeation of water vapor (Patent Document 1). Therefore, development of the adhesive which has gas barrier property, such as oxygen, including water vapor, is calculated | required.

Japanese Unexamined Patent Publication No. 2004-9395

On the other hand, in order to prevent permeation of water vapor, when constituent members are bonded to each other with an acrylic pressure sensitive adhesive, the acrylic pressure sensitive adhesive has low water vapor barrier properties, and thus it is difficult to prevent ingress of water vapor from the end face of the pressure sensitive adhesive layer.

MEANS TO SOLVE THE PROBLEM As a result of earnestly examining the composition of the adhesive composition used for manufacture of an image display apparatus etc., the adhesive layer formed from the adhesive composition containing a specific material has high water vapor barrier property, and also excellent durability, adhesiveness, and flexibility. , It was found to have step tracking and flexibility.

The present invention provides a viscous vapor barrier laminate and an image display device having high vapor barrier properties and excellent durability, adhesion, flexibility, step tracking and flexibility.

1. The adhesive vapor barrier laminate according to one aspect of the present invention,

Materials and

As an adhesive water vapor barrier laminated body containing the adhesive layer formed on the said base material,

The pressure-sensitive adhesive layer,

(A) hydrogenated block copolymer,

(B) a first commercial agent,

(C) obtained from the pressure-sensitive adhesive composition containing the second compatibility agent,

The said (A) hydrogenated block copolymer has the hard segment derived from the polymer component of an aromatic vinyl monomer, and the soft segment derived from the polymer component of a conjugated diene monomer,

The said (B) 1st compatibilizer has the property to be compatible with the said hard segment, and has a softening point of 80 degreeC or more,

Said (C) second compatibilizer has a property compatible with the said soft segment, and is a liquid at normal temperature (23 degreeC),

The water vapor transmission rate when the film thickness of the said adhesive layer is 5 micrometers or more and 300 micrometers or less, and the film thickness of this adhesive layer is 50 micrometers is 100 g / m <2> * day in JISZ0208, 40 degreeCx90% RH. Is less than.

2. The adhesive vapor barrier laminate according to the above 1 may have a water vapor transmittance of less than 30 g / m 2 · day in JIS Z0208 and 40 ° C. × 90% RH.

3. In the adhesive vapor barrier laminate according to the above 1 or 2, the pressure-sensitive adhesive layer may have a storage modulus at 25 ° C. of 0.5 × 10 ⁵ Pa or more and 2.0 × 10 ⁶ Pa or less.

4. The pressure-sensitive vapor barrier laminate according to any one of the above 1 to 3, wherein the pressure-sensitive adhesive composition,

1 mass part or more and 500 mass parts or less of said (B) 1st compatibility agents with respect to 100 mass parts of said (A) hydrogenated block copolymers,

It can contain 1 mass part or more and 200 mass parts or less of said (C) 2nd compatible agent with respect to 100 mass parts of said (A) hydrogenated block copolymers.

5. In the adhesive vapor barrier laminated body in any one of said 1-4, content of the said hard segment in the said (A) hydrogenated block copolymer is 5 mass% or more and 70 mass% or less in the said adhesive composition. Can be.

6. In the adhesive vapor barrier laminated body in any one of said 1-5, The said adhesive composition can further contain a silane coupling agent.

7. In the adhesive vapor barrier laminate according to any one of 1 to 6, the pressure-sensitive adhesive composition may further include a layered clay mineral.

8. In the adhesive vapor barrier laminate according to any one of the above 1 to 7, the water vapor transmission rate of the substrate may be less than 30 g / m 2 · day in JIS Z0208, 40 ° C. × 90% RH.

9. The adhesive vapor barrier laminate according to any one of the above 1 to 8, wherein the base material is formed of at least one oxide, nitride or oxynitride selected from Si, Al, In, Sn, Zn, and Ti. It may have a layer.

10. The image display apparatus which concerns on one aspect of this invention contains the adhesive vapor barrier layer in any one of said 1-9.

Since the said adhesive water vapor barrier laminated body has an adhesive layer obtained from the adhesive composition containing (A) hydrogenated block copolymer, (B) 1st compatible agent, and (C) 2nd compatible agent, it is a high water vapor barrier. Properties, and also has excellent durability, adhesion, flexibility, step tracking and flexibility.

Moreover, the said image display apparatus containing the said adhesive water vapor barrier laminated body can be used in the environment which has a water vapor barrier property and requires durability, adhesiveness, flexibility, step | step trackability, or flexibility.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows typically the adhesive vapor barrier laminated body which concerns on one Embodiment of this invention.
It is sectional drawing which shows typically the adhesive vapor barrier laminated body which concerns on one Embodiment of this invention.
It is sectional drawing which shows typically the adhesive vapor barrier laminated body which concerns on one Embodiment of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail, referring drawings. In addition, in this invention, "part" means a "mass part" and "%" means the "mass%" unless there is particular notice.

1. Adhesive vapor barrier laminate

The adhesive vapor barrier laminate according to one embodiment of the present invention (hereinafter, may be simply referred to as "laminate") includes a substrate and an adhesive vapor barrier laminate comprising a pressure-sensitive adhesive layer formed on the substrate. It is a sieve. The said adhesive layer is described as a (A) hydrogenated block copolymer (Hereinafter, it may be described simply as "(A) component."), And (B) 1st compatible agent (hereinafter, simply "(B) component." And (C) a second commercially available agent (hereinafter, may be simply described as "(C) component").

1.1. Specific example of the laminate

1, 2, and 3 are cross-sectional views schematically showing examples of the sticky water vapor barrier laminate according to the present embodiment.

The adhesive vapor barrier laminated body 10 shown in FIG. 1 contains the base material 1 and the adhesive layer 2 formed on the base material 1 (surface of the base material 1). The material of the base material 1 may be an inorganic material such as glass or an organic material represented by plastic such as polyethylene, polypropylene, polyethylene terephthalate, polymethyl methacrylate, polyester or polycarbonate. In addition, in FIG. 1, the case where the base material 1 is a single layer is shown.

Alternatively, the substrate 1 may be an inorganic material (for example, a layer of at least one oxide, nitride, or oxynitride selected from Si, Al, In, Sn, Zn, and Ti).

The adhesive vapor barrier laminated body 20 shown in FIG. 2 contains the base material 11 and the adhesive layer 2 formed on the surface of the base material 11. In FIG. 2, the example in which the base material 11 is comprised from several layer is shown. That is, as shown in FIG. 2, the base material 11 contains the 1st layer 21 and the other layer (2nd layer 22) formed in the surface of the 1st layer 21, and this 2nd The adhesive layer 2 may be formed on the layer 22.

The material of the first layer 21 may be an inorganic material such as glass or an organic material such as plastic exemplified above as the base material 1. The material of the second layer 22 is not limited, and may be a metal or an inorganic barrier material such as ceramics such as silicon oxide, silicon oxynitride, silicon nitride, or the like, and may be organic such as plastics as exemplified above as the substrate 1. The material may be sufficient.

More specifically, the first layer 21 or the second layer 22 may be formed of an inorganic material (eg, at least one oxide, nitride, or selected from Si, Al, In, Sn, Zn, and Ti). The layer of oxynitride (for example, the vapor deposition film deposited on the organic film) may be sufficient.

In addition, although the example in which the adhesive layer 2 was formed on the 2nd layer 22 of the base material 11 was shown in FIG. 2, in the 1st layer 21 of the base material 11, it is 2nd. The pressure-sensitive adhesive layer 2 may be formed on the side opposite to the side on which the layer 22 is formed, or the pressure-sensitive adhesive layer 2 is formed between the first layer 21 and the second layer 22. You may be.

3 shows an example in which the laminate 30, which is an image display device, includes an organic EL element 3. That is, the laminated body 30 shown in FIG. 3 was formed so that the organic electroluminescent element 3 formed on the base material 1, the base material 1, and the organic electroluminescent element 3 on the base material 1 may be covered. The adhesive layer 2 is included.

According to the laminated body 30 shown in FIG. 3, since the adhesive layer 2 is formed so that the organic electroluminescent element 3 may be covered, since the organic electroluminescent element 3 is sealed, it is the organic electroluminescent element 3 It can block the ingress of water vapor into the furnace.

According to the laminates 10, 20, 30 of FIGS. 1, 2, and 3, intrusion of water vapor from the cross section of the pressure-sensitive adhesive layer 2 (the horizontal direction in the plane of FIGS. 1, 2, 3) can be prevented. have. Moreover, in the laminated body 10, 20, 30, for example, in the state in which the other layer is not formed on the surface of the adhesive layer 2 like the middle of the manufacturing process of the said laminated body, the adhesive layer 2 is carried out. The intrusion of water vapor from the surface perpendicular to the surface of the surface (in the longitudinal direction of the paper in FIGS. 1, 2 and 3) can also be blocked.

Although the adhesive layer 2 of FIG. 1, FIG. 2, and FIG. 3 can also be formed by directly apply | coating the adhesive composition mentioned later on the surface of the base material 1 or the base material 11, the adhesive layer formed on the peelable film The adhesive layer 2 can also be formed on the surface of the substrate 1 or the substrate 11 by transferring (2) to the surface of the substrate 1 or the substrate 11. The water vapor transmission rate of the base material 1 or the base material 11 may be less than 30 g / m 2 · day in JIS Z0208, 40 ° C. × 90% RH (Cup method) (1976 edition), and less than 10 g / m 2 · day. It is preferable and it is more preferable that it is less than 1 g / m <2> * day (it is 1 * 10 <^-6> g / m <2> * day or more) normally. For example, when the water vapor transmission rate of the base materials 1 and 11 is lower than the water vapor transmission rate of the adhesive layer 2 (more specifically, when the base materials 1 and 11 have a water vapor barrier property), the present invention Since the pressure-sensitive adhesive layer can suppress the intrusion of water from the cross section, the water vapor transmission rate of the laminates 10, 20, 30 can be substantially the water vapor transmission rate of the substrates 1, 11.

The water vapor transmission rate when the film thickness of the adhesive layer 2 is 50 micrometers is less than 100 g / m <2> * day in JIS Z0208 and 40 degreeCx90% RH, It is preferable that it is less than 70 g / m <2> * day, 50 It is more preferable that it is less than g / m <2> * day (it is 1 * 10 <^-4> g / m <2> * day or more) normally. In the present invention, "water vapor transmission rate per 50 micrometers of adhesive layers" means the measured value (g / m 2 · day) of water vapor transmission rate in Z0208, 40 ° C. × 90% RH of the pressure-sensitive adhesive monolayer adjusted to a film thickness of 50 μm. do.

The film thickness of the base materials 1 and 11 is 1 micrometer or more and 500 micrometers or less normally, and it is preferable that they are 5 micrometers or more and 200 micrometers or less.

Moreover, when the adhesive vapor barrier laminated body which concerns on this embodiment has transparency (for example, the total light transmittance of the adhesive vapor barrier laminated body which concerns on this embodiment is 85% in JISK7361 method (1997 edition)). In the case of the above), the total light transmittance of the base materials 1 and 11 is preferably 85% or more (usually 100% or less) in the JIS K7361 method, and more preferably 87% or more.

1.2. Water vapor barrier

The adhesive vapor barrier laminate according to the present embodiment has a vapor barrier property. More specifically, the adhesive vapor barrier laminate according to the present embodiment has a water vapor transmittance of less than 30 g / m 2 · day and less than 10 g / m 2 · day in JIS Z0208 and 40 ° C. × 90% RH. It is preferable and it is more preferable that it is less than 1 g / m <2> * day.

In the present invention, "water vapor barrier property" refers to the performance of blocking the intrusion of water vapor, and specifically, means that the water vapor transmittance is less than 30 g / m 2 · day in JIS Z0208 and 40 ° C × 90% RH.

According to the adhesive vapor barrier laminated body which concerns on this embodiment, since the hydrophobicity of the said adhesive layer is excellent and invasion of water vapor from the cross section of this adhesive layer can be prevented, it is excellent in a water vapor barrier property. For this reason, it can use suitably for the use which requires water vapor barrier property.

1.3. Sticky

The adhesive vapor barrier laminate according to the present embodiment has excellent adhesiveness. The adhesiveness of the adhesive vapor barrier laminate according to the present embodiment is mainly derived from the component (B) contained in the adhesive composition used to form the adhesive layer.

1.4. Flexibility

Moreover, the adhesive vapor barrier laminated body which concerns on this embodiment has the outstanding flexibility. The flexibility of the adhesive vapor barrier laminate according to the present embodiment mainly originates from the component (C) contained in the adhesive composition used for forming the adhesive layer.

Since the adhesive vapor barrier laminate according to the present embodiment has excellent flexibility, the adhesive vapor barrier laminate according to the present embodiment can be used for applications requiring flexibility, for example, a curved image display device or a foldable image display device. A sieve can be preferably used.

The excellent flexibility of the adhesive vapor barrier laminate according to the present embodiment can be defined by the storage elastic modulus of the pressure-sensitive adhesive layer included in the laminate, and more specifically, the storage elastic modulus at 25 ° C. is 0.5 × 10 ^5. It can be prescribed | regulated as being Pa or more and 2.0 * 10 <^6> Pa or less. In the present invention, the storage elastic modulus of the pressure-sensitive adhesive layer can be measured by a commercially available rheometer.

1.5. Moisture-resistant whitening

Since the adhesive layer which concerns on this embodiment can prevent the invasion of the water vapor from the cross section of the adhesive layer because of high hydrophobicity, the penetration of water from the horizontal direction (that is, the direction perpendicular to the cross section of the adhesive layer) is prevented. can do. Moreover, since the adhesive layer which concerns on this embodiment has high hydrophobicity, it does not absorb moisture well even under high temperature and high humidity, and whitening of an adhesive layer is suppressed.

1.6. Other characteristics

The adhesive vapor barrier laminate according to the present embodiment can have excellent transparency by including an adhesive layer having high transparency, which is formed from an adhesive composition containing the component (A), the component (B), and the component (C). have. More specifically, in the adhesive vapor barrier laminate according to the present embodiment, the total light transmittance is preferably 85% or more, and more preferably 87% or more in the JIS K7361 method.

1.7. Pressure-sensitive adhesive composition

Although the adhesive layer contained in the adhesive vapor barrier laminated body which concerns on this embodiment can be formed by directly apply | coating the adhesive composition mentioned later on the surface of the base material 1 or the base material 11, it formed on the peelable film. By transferring the adhesive layer 2 to the surface of the base material 1 or the base material 11, the pressure-sensitive adhesive layer 2 may be formed on the surface of the base material 1 or the base material 11. After apply | coating this adhesive composition on the surface of a base material or a peeling film, an adhesive layer is obtained by drying. An adhesive composition contains (A) component, (B) component, and (C) component.

1.7.1. (A) component

The hydrogenated (hydrogenated) block copolymer as the component (A) is a thermoplastic elastomer having a hard segment derived from the polymer component of the aromatic vinyl monomer and a soft segment derived from the polymer component of the conjugated diene monomer. Here, the polymer component of the conjugated diene monomer may be hydrogenated.

Here, more specifically, the aromatic vinyl compound is preferably styrene or α-methylstyrene (more preferably styrene), and the conjugated diene compound is preferably butadiene or isoprene.

The adhesive layer formed using the adhesive composition which concerns on this embodiment containing (A) component has the characteristic that it is excellent in water vapor barrier property compared with the adhesive layer formed from the adhesive composition containing an acrylic polymer.

The component (A) may be an ABA-type hydrogenated block copolymer (triblock), an AB-type hydrogenated block copolymer (diblock), or a mixture thereof. In the present invention, "A" of the ABA type hydrogenated block copolymer and the AB type hydrogenated block copolymer represents a hard segment, and "B" represents a soft segment. Specific examples of the component (A) include, for example, styrene- (ethylene-propylene) -styrene block copolymer (SEPS) (hydrogenated product of styrene-isoprene-styrene block copolymer (SIS)) and styrene- ( Butadiene-butylene) -styrene block copolymer (SBBS) (partially hydrogenated additive of styrene-butadiene-styrene block copolymer (SBS)), styrene- (ethylene-butylene) -styrene block copolymer (SEBS) (Hydrogenate of styrene-butadiene-styrene block copolymer (SBS)), Styrene- (ethylene-propylene) type block copolymer (SEP) (Hydrogenate of styrene-isoprene type block copolymer (SI)), Styrene- (Ethylene-butylene) type block copolymer (SEB) (The hydrogenated substance of a styrene-butadiene type block copolymer (SB)) etc. are mentioned. Among them, from the viewpoint of excellent compatibility with the component (B), the component (A) is a styrene- (ethylene-propylene) -styrene block copolymer (SEPS) and a styrene- (ethylene-butylene) -styrene block. It is preferable that it is 1 type, or 2 or more types chosen from a copolymer (SEBS), a styrene- (ethylene propylene) type block copolymer (SEP), and a styrene- (ethylene-butylene) type block copolymer (SEB). These may be used independently and may be used in combination of 2 or more type.

Moreover, it is preferable that (A) component is a mixture of a triblock body and a diblock body, In this case, it is preferable that content of a triblock body is 20 mass% or more and 95 mass% or less with respect to the mixture (more preferable) Preferably, it is 30 mass% or more and 90 mass% or less), and it is preferable that content of a diblock body is 5 mass% or more and 80 mass% or less with respect to the mixture (more preferably, 10 mass% or more and 70 mass% or less). .

In the present invention, "compatible" or "compatibilizing" means that no haze or phase separation is visually confirmed in a mixture obtained by mixing two different components.

Here, whether (B) component is compatible with the hard segment which comprises (A) component uses the component corresponded to the hard segment of (A) component, ie, the polymer synthesized only by aromatic vinyl monomer, and (B) component. Evaluate.

More specifically, generation | occurrence | production of turbidity in the mixture obtained by mixing the polymer and (B) component superposed | polymerized only with an aromatic vinyl monomer using a solvent as needed, or containing the phase and (B) component containing this polymer are contained. When phase separation with the said phase is not visually observed, (B) component shall be compatible with the hard segment which comprises (A) component, On the other hand, when the haze or phase separation mentioned above is visually observed, (B) component shall not be compatible with the hard segment which comprises (A) component.

As the component (A), commercially available hydrogenated block copolymers such as SEPtones 1001 and 1020, SEPS type Sefton 2002, 2004, 2005, 2006, 2007, 2063 and 2104, SEBS type Seftone 8004, 8006, 8007, 8076 and 8104 (all of the above Sepptone series are manufactured by Kuraresa), toughtec H1221, H1662, H1052, H1053, H1041, H1051, H1517, H1043, H1272 and N504, SBBS of tough type of SEBS Tec P1500, P2000, and JT83X (all of the said Toughtec series can be used by Asahi Kasei Co., Ltd.), etc. can also be used.

From a viewpoint of providing heat resistance to the adhesive composition which concerns on this embodiment, it is preferable that the content rate of the hard segment (for example, styrene) in (A) component is 5 mass% or more and 70 mass% or less, and it is 10 mass% or more and 60 It is more preferable that it is mass% or less, and it is still more preferable that they are 10 mass% or more and 40 mass% or less. If the content rate of the hard segment in (A) component is less than 5 mass%, heat resistance will fall, and if it exceeds 70 mass%, an adhesive layer may become hard too much and adhesiveness with a to-be-adhered body may be inferior.

Moreover, the hydrogenation rate (hydrogenation rate) of the double bond contained in the polymer component of the conjugated diene monomer which comprises (A) component from a viewpoint excellent in compatibility with (C) component (Hereinafter, it is also called simply "hydrogenation rate." ) Is preferably 90% or more, more preferably 95% or more (also, the hydrogenation rate is preferably 100%, but even if a double bond of trace amount (eg, 0.001% or more and 0.1% or less) remains. none).

That is, in this invention, the hydrogenation rate of the double bond contained in the polymer component of a conjugated diene monomer means the ratio of what is saturated by hydrogenation of the double bond contained in the polymer component of a conjugated diene monomer.

Here, whether (C) component is compatible with the soft segment which comprises (A) component uses the component corresponded to the soft segment of (A) component, ie, the polymer synthesize | combined only by the conjugated diene monomer, and (B) component. Evaluate.

More specifically, in the mixture obtained by mixing the polymer and (C) component superposed | polymerized only by a conjugated diene monomer using a solvent as needed, the generation | occurrence | production of turbidity or the phase and (C) component containing the polymer body are contained. When the occurrence of phase separation is not visually observed between the phases to contain, (C) component shall be compatible with the soft segment which comprises (A) component, and the haze or phase separation mentioned above visually When observed with (C), it shall not be compatible with the soft segment which comprises (A) component.

In the point which can provide moderate adhesiveness, flexibility, and a step | following track | tracking property to an adhesive layer, the weight average molecular weight of (A) component in the adhesive composition which concerns on this embodiment is 10,000 or more and 300,000 or less (more preferably, 50,000 to 300,000, more preferably 50,000 to 250,000). In addition, when (A) component is a mixture of the above-mentioned triblock body and a diblock body, the weight average molecular weight of (A) component means the weight average molecular weight of this mixture.

1.7.2. (B) component

The 1st compatibilizer which is (B) component has the property to be compatible with the hard segment which comprises (A) component, and its softening point is 80 degreeC or more. Since the adhesive composition which concerns on this embodiment contains (B) component, since (B) component is compatible with the hard segment which comprises (A) component, the hardness of some degree is given to the adhesive layer formed from this adhesive composition. It can provide and the heat resistance and adhesive force of this adhesive layer can be improved.

Component (B) may be, for example, a tackifier resin having an aromatic ring. It is preferable that it is a weight average molecular weight 5,000 or less, and, as for tackifying resin which has an aromatic ring used as (B) component, it is 500 or more and 3,000 or less from a viewpoint of favorable compatibility and adhesiveness.

As tackifying resin which has an aromatic ring which can be used as (B) component, For example, aromatic petroleum resin, a styrene polymer, the (alpha) -methylstyrene type polymer, a styrene- ((alpha) -methylstyrene) type copolymer, styrene-aliphatic Hydrocarbon copolymers, styrene- (α-methylstyrene) -aliphatic hydrocarbon copolymers, styrene-aromatic hydrocarbon copolymers, and the like. More specifically, for example, FMR-0150 (softening point 145 ° C, manufactured by Mitsui Chemical Co., Ltd.) as a styrene-aromatic hydrocarbon copolymer, commercially available FTR-6100 (softening point 100 ° C, manufactured by Mitsui Chemical Co., Ltd.) ), FTR-6110 (softening point 110 ° C, manufactured by Mitsui Chemical Co., Ltd.) and FTR-6125 (softening point 125 ° C, manufactured by Mitsui Chemical Co., Ltd.), FTR-7100 (softening point 100 ° C as styrene- (α-methylstyrene) -aliphatic hydrocarbon copolymer) , Mitsui Chemical Co., Ltd.), FTR-8120 (softening point 120 degreeC, Mitsui Chemicals Co., Ltd.), SX-100 (softening point 100 degreeC, Yashara Chemical Co., Ltd.), FTR-0100 (softening point) as (alpha) -methylstyrene-type polymer 100 ° C, manufactured by Mitsui Chemical Co., Ltd., FTR-2120 (softening point 120 ° C, manufactured by Mitsui Chemical Co., Ltd.) as a styrene- (α-methylstyrene) -based copolymer, FTR-2140 (softening point 145 ° C, manufactured by Mitsui Chemical Company), Crystalx 3100 ( softening Point 100 ° C, manufactured by Eastman Chemical Co., Ltd., Crystallex 3085 (softening point 85 ° C, manufactured by Eastman Chemical, Inc.), Crystallex 5140 (softening point 140 ° C, manufactured by Eastman Chemical, Inc.), Crystallex 1120 (softening point 120 ° C, manufactured by Eastman Chemical, Inc.) ), Crystallex F85 (softening point 85 ° C, manufactured by Eastman Chemical Co., Ltd.), Crystallex F100 (softening point 100 ° C, manufactured by Eastman Chemical Co., Ltd.), Crystallex F115 (softening point 115 ° C, manufactured by Eastman Chemical Co., Ltd.), and the like. As (B) component, these may be used independently and may be used in combination of 2 or more type.

From the viewpoint of enhancing the durability and adhesive strength of the pressure-sensitive adhesive composition according to the present embodiment, the softening point of the component (B) may be 80 ° C or higher, preferably 95 ° C or higher, and more preferably 140 ° C.

Moreover, from a viewpoint which can adjust compatibility with (A) component and can suppress a performance change with time, content of (B) component is 1 mass part or more and 500 mass parts with respect to 100 mass parts of (A) component. It is preferable that it is the following, and it is more preferable that it is 5 mass parts or more and 100 mass parts or less.

1.7.3. (C) component

The 2nd compatibilizer which is (C) component has the property to be compatible with the soft segment which comprises (A) component, and is a liquid at normal temperature (23 degreeC). In addition, the "liquid" of the part referred to in this invention includes a viscoelastic liquid which is viscous, and other liquids of low viscosity.

Since the adhesive composition which concerns on this embodiment contains (C) component, since (C) component is compatible with the soft segment which comprises (A) component, the result by improving the wettability and flexibility of the adhesive layer As the adhesiveness to the adherend and the tack can be improved, flexibility can be imparted to the pressure-sensitive adhesive layer obtained by using the composition.

Component (C) may be, for example, a softener including an aliphatic hydrocarbon such as a polybutene compound, a polyisobutylene compound, a polyisoprene compound, and the like. As a softener which can be used as (C) component, it is a commercially available softener, for example, Niseki polybutene LV-7, LV-50, LV-100, HV-15, HV-35, HV-50 as a polybutene type compound. , HV-100, HV-300, HV-1900 and SV-7000 (all manufactured by JX Nikko Niseki Energy Co., Ltd.), polyisobutylene-based compounds, Tetrax 3T, 4T, 5T and 6T, High Mole 4H, 5H, 5.5 H and 6H (both manufactured by JX Nikko Niseki Energy Co., Ltd.) and polyisoprene-based compounds may also be used as Kuraprene LIR-290 (manufactured by Kuraray Co., Ltd.). As (C) component, these may be used independently and may be used in combination of 2 or more type.

It is preferable that the molecular weight (number average molecular weight) of (C) component is 5,000 or less, and, as for using the adhesive composition which concerns on this embodiment, the molecular weight (number average molecular weight) of (C) component is more preferable that it is 500 or more and 3,000 or less. .

Moreover, from a viewpoint which can adjust compatibility with (A) component and can suppress a performance change with time, content of (C) component is 1 mass part or more and 200 mass parts with respect to 100 mass parts of (A) component. It is preferable that it is the following, and it is more preferable that it is 5 mass parts or more and 150 mass parts or less. Moreover, it is preferable that the sum total content of (B) component and (C) component is 10 mass parts or more and 300 mass parts or less with respect to 100 mass parts of (A) component, It is more preferable that they are 15 mass parts or more and 250 mass parts or less, It is more preferable that they are 20 mass parts or more and 200 mass parts or less. Moreover, in the adhesive composition which concerns on this embodiment, it is preferable that the sum total content of (A) component, (B) component, and (C) component is 60 mass% or more and 100 mass% or less with respect to the whole adhesive composition.

1.7.4. (D) component

The adhesive composition which concerns on this embodiment can contain (D) 3rd compatible agent (Hereinafter, it may describe as "(D) component."). (D) component has a property compatible with the soft segment which comprises (A) component at least, and is solid at normal temperature (23 degreeC). The component (D) may be a rosin-based tackifying resin, a terpene-based tackifying resin, or a hydrogenated alicyclic hydrocarbon resin. As (D) component, KE311 (light blue rosin type tackifying resin, Arakawa Chemical Corporation make), TH-130 (terpene phenol type tackifying resin, Yashara Chemical Co., Ltd. make), P-100 (hydrogenated cycloaliphatic) Saturated hydrocarbon resin, Arakawa Chemical Co., Ltd.) can be used. As (D) component, you may use these individually, and may use it in combination of 2 or more type.

Moreover, from a viewpoint which can adjust compatibility with (A) component and can suppress a performance change with time, content of (D) component is 1 mass part or more and 60 mass parts with respect to 100 mass parts of (A) component. It is preferable that it is the following, and it is more preferable that it is 5 mass parts or more and 40 mass parts or less.

1.7.5. Other ingredients

The adhesive composition which concerns on this embodiment is another component other than (A) component, (B) component, (C) component, and (D) component (Hereinafter, it may describe as "(E) component.)) It may include. As another component, you may contain 1 type (s) or 2 or more types of additives, such as antioxidant, a silane coupling agent, a layered clay mineral, for example. Examples of the antioxidant include phenolic antioxidants such as BHT (molecular weight 220), adecastab AO-330 (molecular weight 775) (manufactured by ADEKA), Irganox 1076 (molecular weight 531) (manufactured by BASF) Can be. As a silane coupling agent, For example, polymeric unsaturated-group containing silicon compounds, such as vinyl trimethoxysilane, vinyl triethoxysilane, and methacryloxypropyl trimethoxysilane; Silicon compounds having an epoxy structure such as 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, and 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane; Amino group-containing silicon compounds such as 3-aminopropyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropyltrimethoxysilane and N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane; And 3-chloropropyltrimethoxysilane; And oligomeric silane coupling agents. As a layered clay mineral, smectite (for example, lipophilic smectite, such as lucentite SAN316, SAN, SТN, SPN (made by Coop Chemical)) is mentioned, for example. These may be used independently and may be used in combination of 2 or more type.

1.8. Usage

The adhesive vapor barrier laminate according to the present embodiment can be suitably used for applications in which water vapor barrier properties are required. For example, the adhesive vapor barrier laminate according to the present embodiment can be used for an image display device such as an organic EL device, a solar cell having an organic film, and a use requiring water resistance.

1.9. Acid

From the viewpoint of preventing corrosion of the adherend, the acid value of the component (A), the component (B), the component (C) and the component (D) according to the present embodiment is preferably 1 or less, respectively. It is preferable that the acid value of an adhesive composition is one or less.

1.10. Effect

The adhesive water vapor barrier laminate according to the present embodiment has excellent water vapor barrier properties by including the pressure-sensitive adhesive layer obtained from the pressure-sensitive adhesive composition containing the component (A), the component (B) and the component (C).

Moreover, the adhesive vapor barrier laminated body which concerns on this embodiment originates in (B) component in the said adhesive composition used when obtaining the said adhesive layer, and has the outstanding adhesiveness, The said used to obtain the said adhesive layer Due to the component (C) in the pressure-sensitive adhesive composition, it has excellent flexibility and flexibility. In addition, since the step tracking ability is excellent due to flexibility and flexibility, even when the joining portions have a step, the joining members can be reliably joined even when the joining portions have a step. Moreover, it is possible to use suitably for the bonding of the structural member in the image display apparatus which can be folded or wound due to the outstanding flexibility.

Moreover, the adhesive vapor barrier laminated body which concerns on this embodiment has the outstanding transparency and wet heat whitening resistance.

In addition, in the said adhesive composition used when obtaining the said adhesive layer, (B) component is compatible with the hard segment which comprises (A) component, and (C) component is compatible with the soft segment which comprises (A) component. Thereby, the wettability and durability with respect to a to-be-adhered body can be improved. Moreover, durability (heat resistance) can be improved because the said adhesive composition contains the (B) component whose softening point is 80 degreeC or more.

More specifically, the improvement of the wettability with respect to a to-be-adhered body, the improvement of a softness, and the softening point resulting from (B) component by high compatibility with the soft segment which comprises (A) component resulting from (C) component are high. By the two interactions of the improvement of heat resistance and adhesive force by a component, the adhesive layer excellent in durability, adhesive force, tack, and flexibility can be obtained.

Moreover, the image display apparatus (for example, organic electroluminescent apparatus) and solar cell which contain the adhesive vapor barrier laminated body which concerns on this embodiment are stuck by a moderate adhesive force to a to-be-adhered body, and have excellent durability.

2. Adhesive layer (adhesive sheet)

The adhesive layer (adhesive sheet) which concerns on one Embodiment of this invention is obtained from the adhesive composition which concerns on the said embodiment containing (A) component, (B) component, and (C) component.

In the adhesive layer which concerns on this embodiment, when the total content of (A) component, (B) component, and (C) component makes 100 mass% of the whole adhesive layer, they are 60 mass% or more and 100 mass% or less. It is preferable.

The pressure-sensitive adhesive layer according to the present embodiment has a film thickness of 5 µm or more and 300 µm or less (preferably 5 µm or more and 200 µm or less), and the water vapor transmission rate when the film thickness of the pressure-sensitive adhesive layer is 50 µm is JIS. It is less than 100 g / m <2> * day (preferably less than 70 g / m <2> * day, More preferably, less than 50 g / m <2> * day) in Z0208, 40 degreeCx90% RH (Cup method).

Since the adhesive layer which concerns on this embodiment has the outstanding flexibility, it is preferable that the storage elastic modulus in 25 degreeC of the said adhesive layer is 0.5 * 10 <^5> Pa or more and 2.0 * 10 <^6> Pa or less, and it is 0.8 * 10 <^5> Pa As for the above, it is more preferable that it is 1.0 * 10 <^6> Pa or less.

Although the adhesive layer which concerns on this embodiment can apply | coat the adhesive composition which concerns on the said embodiment directly to the surface of the base material 1 or the base material 11, the adhesive layer 2 formed on the peelable film is a base material ( By transferring to the surface of 11), an adhesive layer can also be formed in the surface of the base material 11. More specifically, on the base material or the peelable film, the adhesive composition which concerns on this embodiment is apply | coated with a gravure coater, a wire bar coater, an air knife coater, a roll coater, etc., and the apply | coated adhesive composition is applied by normal temperature or heating. You may dry and produce the adhesive layer which concerns on this embodiment.

3. Image display device

The image display apparatus which concerns on other embodiment of this invention contains the adhesive layer formed using the adhesive composition which concerns on the said embodiment. As an image display apparatus which concerns on this embodiment, organic electroluminescent apparatus (for example, the laminated body 30 shown in FIG. 3) and a liquid crystal display device are mentioned, for example.

4. Examples

EMBODIMENT OF THE INVENTION Hereinafter, although this invention is demonstrated based on the following Example, this invention is not limited to an Example.

4.1. Preparation of pressure-sensitive adhesive composition

(A) Hydrogenated block copolymer shown in Table 1 and Table 2, (B) 1st compatibilizer, (C) 2 in reaction container provided with a cooling tube, a nitrogen introduction tube, a thermometer, a dropping funnel, and a stirring apparatus. A solvent and 150 parts by weight of toluene were injected and stirred at 40 ° C. for 5 hours to prepare pressure-sensitive adhesive compositions of Examples 1 to 18 and Comparative Examples 1 to 6, respectively. In addition, the 50-micrometer-thick adhesive sheet used by the evaluation method mentioned later is obtained by apply | coating each adhesive composition on the surface of a separator, and drying it.

4.2. Preparation of Acrylic Adhesive Composition

In the following method, acrylic polymers 1 to 3 which were acrylic pressure-sensitive adhesive compositions used in Comparative Examples 7 to 9 were prepared, respectively.

4.2.1. Acrylic polymer 1:

In a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer, a dropping funnel and a stirring device, 200 parts by weight of ethyl acetate as a solvent, 60 parts by weight of n-butylacrylate as a monomer component, 30 parts by weight of methyl acrylate, 2- 10 parts by weight of hydroxyethyl acrylate was added, and nitrogen reflux was carried out at room temperature for 1 hour, and then the temperature of the monomer composition solution in the reaction vessel was raised to 80 ° C, and 0.1 parts by mass of 2,2'-azobisisobutyronitrile was stirred. Added under. The polymerization was carried out in a nitrogen stream for 10 hours to obtain a solution of a copolymer (polymer 1) having a weight average molecular weight of 600,000.

4.2.2. Acrylic Polymer 2:

200 parts by weight of ethyl acetate as a solvent, 60 parts by weight of 2-ethylhexyl acrylate as a monomer component, 30 parts by weight of methyl acrylate, to a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer, a dropping funnel and a stirring device. 10 parts by weight of hydroxyethyl acrylate was added, and nitrogen reflux was performed at room temperature for 1 hour, and then the temperature of the monomer composition solution in the reaction vessel was raised to 80 ° C, and 0.1 parts by mass of 2,2'-azobisisobutyronitrile. It was added under stirring. The polymerization was carried out in a nitrogen stream for 10 hours to obtain a solution of a copolymer (polymer 2) having a weight average molecular weight of 600,000.

4.2.3. Acrylic Polymer 3:

After substituting nitrogen in the 2 L three-necked flask, 870 g of toluene and 44 g of 1,2-dimethoxyethane were added at room temperature, followed by isobutylbis (2,6-di-t-butyl-4- 39.8 g of toluene solution containing 26.7 mmol of methylphenoxy) aluminum was added, and 2.20 g of a mixed solution of cyclohexane and n-hexane containing 3.81 mmol of sec-butyllithium were further added. Then, 6.5 g of methyl methacrylate was added to this liquid mixture. The reaction solution was initially yellow in color, but became colorless after stirring at room temperature for 60 minutes. The conversion rate of methyl methacrylate at this time was 99.9 mass% or more. Then, the internal temperature of the reaction liquid was cooled to -30 degreeC, 87 g of n-butyl acrylates were dripped over 2 hours, and after completion | finish of dripping, it stirred at -30 degreeC for 5 minutes. The conversion rate of n-butyl acrylate at this time was 99.9 mass% or more. Further, 6.5 g of methyl methacrylate was added thereto, and after stirring at room temperature overnight, 3.50 g of methanol was added to terminate the polymerization reaction. The conversion rate of methyl methacrylate at this time was 99.9 mass% or more. The obtained reaction liquid was poured into 15 kg of methanol to precipitate a white precipitate. The white precipitate was collected by filtration and dried to obtain a block copolymer. This copolymer was dissolved in ethyl acetate, and the block copolymer solution 1 of 35 mass% of solid content concentration was obtained. The weight average molecular weight (Mw) of the obtained block copolymer (polymer 3) was 150,000, and molecular weight distribution (Mw / Mn) was 1.3.

4.3. Preparation of Evaluation Adhesive Sheet (Adhesive Layer)

After the defoaming treatment, the pressure-sensitive adhesive compositions of Examples 1 to 18 and Comparative Examples 1 to 6 were each applied onto the peeled polyethylene terephthalate film using a doctor blade, dried at 90 ° C. for 3 minutes, and dried to a dry film thickness. A 50-micrometer coating film was formed. A pressure-sensitive adhesive layer having a thickness of 50 μm sandwiched between two peeled polyethylene terephthalate films by further bonding a peeled polyethylene terephthalate film to the surface opposite to the pasting surface of the polyethylene terephthalate film of the coating film. The adhesive sheet for evaluation which has the obtained was obtained.

4.4. Evaluation method of an adhesive layer

4.4.1. Storage modulus

4.3. The adhesive sheets for evaluation (50-micrometer-thick adhesive layer) obtained by the column were bonded together multiple times in 23 degreeC x 50% RH environment, and it processed in the autoclave of 50 degreeC / 5 atm for 20 minutes, and the adhesive layer of thickness 1.0mm Was produced. About this adhesive layer of thickness 1.0mm, the dynamic viscoelasticity measuring method (temperature range -40 degreeC-160 degreeC, temperature rising rate of 3.67 degreeC / min, frequency 1Hz) based on JISK7244 using Anton Paar "Physica MCR300" Conditions), the viscoelastic spectrum was measured, and the storage modulus at a temperature of 25 ° C was determined.

4.4.2. Water vapor transmission rate

Evaluation of the water vapor transmission rate was performed according to JIS Z0208. That is, 4.3. After peeling the peeling-treated polyethylene terephthalate film of both surfaces of the adhesive sheet for evaluation obtained by the column, and bonding a nonwoven fabric, the adhesive sheet for evaluation which pinched with the nonwoven fabric on the moisture permeation cup (60 mm inside diameter) which put about 10 g of calcium chlorides. Enclosed around. Thereafter, the moisture-permeable cup was left standing in a 40 ° C. × 90% RH environment and measured.

4.4.3. Total light transmittance

Evaluation of total light transmittance was performed in 23 degreeC x 50% RH environment according to JISK7361 method.

4.4.4. Weatherability (yellowing)

4.3. The color of the pressure-sensitive adhesive layer having a thickness of 50 μm before and after the test, which was obtained by irradiating the pressure-sensitive adhesive sheet for evaluation obtained in the column at a irradiation intensity of 60 W / m 2 for 600 hours using a xenon weather meter, was measured in a 23 ° C. × 50% RH environment. When Δb * is 2.0 or less, it is determined that the weather resistance is excellent, and when Δb * exceeds 2.0, it is determined that the weather resistance is poor.

4.4.5. Moisture-resistant whitening

4.3. One side polyethylene terephthalate film of the adhesive sheet for evaluation obtained by the column was peeled off, the polyethylene terephthalate film of thickness 100micrometer was bonded together, and the test piece of 50 mm square was produced. After peeling the polyethylene terephthalate film which peeled on the other side, and bonding a test piece to glass and autoclaving (50 degreeC, 5 atm, 20 minutes), haze of a laminated body was haze meter (model name "HM-150") And Murakami Color Research Institute, Inc. were used (initial haze). Subsequently, the sample was put into a dryer at 85 ° C × 85% RH for 24 hours, taken out under 23 ° C × 50% RH environment and left for 1 hour, and then the haze of the laminate was measured again (haze after moist heat). When moist heat haze after moist heat is set to (DELTA) haze, and when (DELTA) haze is 1.0 or less, it is determined that it is excellent in damp-heat whitening resistance, and when it exceeds (DELTA) haze 1.0, it is determined that moisture-heat whitening resistance is inferior.

4.4.6. Tag (Probe Tag)

4.3. The peeled polyethylene terephthalate film of one side of the adhesive sheet for evaluation obtained by the column was peeled off, the polyethylene terephthalate film of thickness 100micrometer was bonded together, and the test piece was produced. The peeled polyethylene terephthalate film film of one side of the test piece was peeled off, and the probe tack of the exposed adhesive coating surface was measured. The probe was SUS with a diameter of 5 mm, the contact time was 1 second, the probe speed was 1 cm / sec, and the load was 20 g.

4.5. Evaluation method of the laminate

4.5.1. Water vapor transmission rate

Evaluation of water vapor transmission rate is described in 4.3. One side of the polyethylene terephthalate film of the adhesive sheet for evaluation obtained by the column was peeled off, it bonded together to the base material of Table 1 and Table 2, and it implemented in 40 degreeC x 90% RH environment according to JISZ0208 (1976 edition).

4.5.2. adhesiveness

4.3. The polyethylene terephthalate film of one side of the adhesive sheet for evaluation obtained by the column was peeled off, it bonded together to the base material of Table 1 and Table 2, it cut out to width 25mm, and produced the test piece.

The polyethylene terephthalate film on the opposite side to the base material of the said test piece was peeled off, and the exposed adhesive coating surface was crimped | bonded to glass using the 2 kg roller. After 20 minutes from sticking, the adhesive sheet was peeled from the glass plate (23 degreeC, peeling angle 180 degrees, peeling rate 300 mm / min), and adhesive force (initial stage) was measured in 23 degreeC x 50% RH environment.

4.5.3. Total light transmittance

4.3. The polyethylene terephthalate film of one side of the adhesive sheet for evaluation obtained by the column was peeled off, it bonded together to the base material of Table 1 and Table 2, it cut out to width 25mm, and produced the test piece. Evaluation of total light transmittance was performed in 23 degreeC x 50% RH environment according to JISK7361 method (1997 edition).

In addition, the meaning of the abbreviation in Table 1 and Table 2 is as follows.

Rubber polymer 1: mixture of 50 mass% of SEPS and 50 mass% of SEP (styrene content 15%, weight average molecular weight 130,000)

Rubber-based polymer 2: mixture of 50 mass% of SEPS and 50 mass% of SEP (styrene content 20%, weight average molecular weight 150,000)

Rubber polymer 3: mixture of SEBS 30 mass% and SEB 70 mass% (styrene content 30%, weight average molecular weight 100,000)

In addition, the said SEPS, SEBS, SEP, and SEB are all 90% or more of hydrogenation rate.

Rubber polymer 4: mixture of 50 mass% of SIS and 50 mass% of SI (15 mass% of styrene content, 100,000 weight average molecular weight)

Rubber-based polymer 5: 50 mass% of SBS and 50 mass% of SB (styrene content 16 mass%, weight average molecular weight 130,000)

Acrylic polymer 1: n-butyl acrylate / methyl acrylate / 2-hydroxyethyl acrylate = 60/30/10 (mass ratio)

Acrylic polymer 2: 2-ethylhexyl acrylate / methyl acrylate / 2-hydroxyethyl acrylate = 60/30/10 (mass ratio)

Acrylic polymer 3: ABA type triblock polymer of methyl methacrylate / n-butyl acrylate / methyl methacrylate = 6.5 / 87 / 6.5 (mass ratio)

Adecastab AO-330: Phenolic antioxidant (manufactured by ADEKA Corporation)

Lucentite SAN316: Layered Clay Minerals (manufactured by Coop Chemical Co., Ltd.)

FMR-0150: aromatic tackifying resin of softening point 145 degreeC (made by Mitsui Chemicals, weight average molecular weight: 2,040)

FTR-6100: aromatic tackifying resin of softening point 100 degreeC (made by Mitsui Chemicals, weight average molecular weight: 1,210)

KBM-303: Silane Coupling Agent (2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane) (manufactured by Shin-Etsu Chemical Co., Ltd.)

LV-100: Polybutene (Mn = 500) (manufactured by JX Nikko Niseki Energy Co., Ltd.)

HV-300: Polybutene (Mn = 1,400) (manufactured by JX Nikko Niseki Energy Co., Ltd.)

TH-130: terpene phenol type tackifying resin (manufactured by Yashara Chemical Co., Ltd.)

Substrate (1): A transparent barrier film having a film thickness of 100 μm, a total light transmittance of 90.0%, and a water vapor transmittance of 4.8 × 10 ⁻⁴ g / m 2 · day

Substrate (2): transparent barrier film having a film thickness of 12 μm, a total light transmittance of 90.0%, and a water vapor transmittance of 1 g / m 2 · day

Substrate (3): Polyethylene terephthalate film having a film thickness of 25 μm, a total light transmittance of 92.3%, and a water vapor transmittance of 25 g / m 2 · day

4.6. Evaluation results

From the results of Table 1, in the laminates of Examples 1 to 18 of the present application, the pressure-sensitive adhesive layer includes (A) hydrogenated block copolymers (rubber-based polymers 1 to 3), (B) a first compatibilizer, and a (C) agent. Since it is obtained from the adhesive composition containing 2 compatibilizers, it can be understood that an adhesive layer has the outstanding water vapor barrier property, and also excellent transparency, durability (wet heat whitening), adhesiveness, flexibility, and a step | following followability.

On the other hand, as shown in Table 1, since the compositions of Comparative Examples 1, 3, 4, and 6 of the present application do not contain the component (B), the pressure-sensitive adhesive layer obtained by using the composition is inferior in adhesive force or weather resistance. I can understand.

Moreover, since the compositions of Comparative Examples 1 and 2 do not contain the component (C), the storage elastic modulus of the pressure-sensitive adhesive layer obtained from the composition cannot be measured, and it is understood that flexibility and tack are inferior.

Moreover, since the composition of Comparative Examples 4-6 contains the rubber-based polymer which is not hydrogenated instead of (A) component, it can understand that weather resistance is inferior.

Moreover, since the composition of Comparative Examples 7-9 does not contain (A) component and contains an acrylic polymer, the adhesive layer obtained from the composition is inferior to water vapor barrier property, and as a result, inferior in moisture heat whitening resistance. I can understand that.

Claims (10)

Materials and
As an adhesive water vapor barrier laminated body containing the adhesive layer formed on the said base material,
The pressure-sensitive adhesive layer,
(A) hydrogenated block copolymer,
(B) a first commercial agent,
(C) obtained from the pressure-sensitive adhesive composition containing the second compatibility agent,
The said (A) hydrogenated block copolymer has a hard segment derived from the polymer component of an aromatic vinyl monomer, and the soft segment derived from the polymer component of a conjugated diene monomer, and is a double bond contained in the polymer component of the said conjugated diene monomer. The hydrogenation rate is over 90%,
The said (B) 1st compatibilizer is a tackifying resin which has a property compatible with the said hard segment, has a softening point of 80 degreeC or more, and has an aromatic ring, aromatic petroleum resin, a styrene polymer, and (alpha) -methylstyrene type At least one selected from polymers, styrene- (α-methylstyrene) copolymers, styrene-aliphatic hydrocarbon copolymers, styrene- (α-methylstyrene) -aliphatic hydrocarbon copolymers and styrene-aromatic hydrocarbon copolymers Is,
Said (C) second compatibilizer has a property compatible with the said soft segment, and is a liquid at normal temperature (23 degreeC),
The water vapor transmission rate when the film thickness of the said adhesive layer is 5 micrometers or more and 300 micrometers or less, and the film thickness of this adhesive layer is 50 micrometers is 100 g / m <2> * day in JISZ0208, 40 degreeCx90% RH. An adhesive water vapor barrier laminate which is less than. The method of claim 1,
The adhesive vapor barrier laminated body whose water vapor transmission rate is less than 30 g / m <2> * day in JISZ0208 and 40 degreeCx90% RH. The method according to claim 1 or 2,
The adhesive vapor barrier laminated body whose storage elastic modulus at 25 degrees C of the said adhesive layer is 0.5 * 10 <^5> Pa or more and 2.0 * 10 <^6> Pa or less. The method according to claim 1 or 2,
The pressure-sensitive adhesive composition,
1 mass part or more and 500 mass parts or less of said (B) 1st compatibility agents with respect to 100 mass parts of said (A) hydrogenated block copolymers,
The adhesive vapor barrier laminated body containing said (C) 2nd compatible agent of 1 mass part or more and 200 mass parts or less with respect to 100 mass parts of said (A) hydrogenated block copolymers. The method according to claim 1 or 2,
The said adhesive composition WHEREIN: The adhesive vapor barrier laminated body whose content of the said hard segment in the said (A) hydrogenated block copolymer is 5 mass% or more and 70 mass% or less. The method according to claim 1 or 2,
The pressure-sensitive adhesive composition further comprises a silane coupling agent. The method according to claim 1 or 2,
The pressure-sensitive adhesive composition further comprises a layered clay mineral, adhesive vapor barrier laminate. The method according to claim 1 or 2,
The adhesive vapor barrier laminated body whose water vapor transmission rate of the said base material is less than 30 g / m <2> * day in JISZ0208, 40 degreeCx90% RH. The method according to claim 1 or 2,
An adhesive vapor barrier laminate, wherein the substrate has a layer of at least one oxide, nitride, or oxynitride selected from Si, Al, In, Sn, Zn, and Ti. The image display apparatus containing the adhesive vapor barrier laminated body of Claim 1 or 2.

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