JP2024007852A - Optical member having surface protective film, optical laminate, and manufacturing method of optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical member having a surface protective film capable of preventing a protrusion of a processed end part of an optical member when the thin optical member is laser-processed, to provide an optical laminate having such an optical member having a surface protective film, and to provide a manufacturing method of an optical device using such an optical member having a surface protective film.

SOLUTION: An optical member having a surface protective film includes a surface protective film (I) and an optical member. The surface protective film (I) includes a substrate (Ia) and an adhesive layer (Ib). The adhesive layer (Ib) and the optical member are directly laminated. Thickness of the optical member is 400 μm or less, and thickness of the substrate (Ia) is less than 60 μm.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to an optical member with a surface protection film, an optical laminate, and a method for manufacturing an optical device.

In order to impart rigidity and impact resistance to an optical member included in an optical device, a reinforcing base material is provided with a reinforcing film (adhesive layer) on the surface (typically, the exposed surface) of the optical member in advance. ) may be reinforced by bonding them together (Patent Documents 1 to 3).

Reinforcing films are usually intended for permanent adhesion, and are generally used as surface protection films as process materials. This is different from the one that is peeled off again before using the device. For this reason, the adhesive constituting the adhesive layer of the reinforcing film is usually designed to achieve permanent adhesion.

In recent years, there has been a demand for thinner optical devices such as organic EL panels, LCD panels, touch panels, and the like. On the other hand, the reinforcing film for the optical member ultimately remains in the optical device. Therefore, it is not enough that a reinforcing film for an optical member included in an optical device that is required to be thin is not merely capable of exhibiting a reinforcing effect, but is also required to be thin.

The manufacturing process of the optical device may include a step of laser processing the optical member to which the reinforcing film as described above is bonded. In this laser processing, a laser is usually irradiated from the reinforcing film side of the optical member to which the reinforcing film is bonded.

However, when laser processing is performed by irradiating a laser from the reinforcing film side of an optical member to which the reinforcing film is bonded, there is a problem that the processed end of the reinforcing film is raised. Since such a raised portion ultimately remains in the optical device, it causes quality defects and the like.

The problem of bulging of the cut surface when laser processing the polarizing plate itself (that is, the optical member itself) has been raised in the past, and as a solution to this problem, laminating a specific resin film with high heat resistance on the polarizing plate has been proposed. A method of laser irradiation from the resin film side of the produced laminate has been reported (Patent Documents 4 and 5). However, in order to express the effect of the specific resin film with high heat resistance used in this method, specifically, as described in Example 1 of Patent Document 4 and Example 1 of Patent Document 5, A thick resin film with a total thickness of 703 μm is used by coating one side of a 700 μm thick epoxy film with acrylic urethane UV resin to form a 3 μm thick protective layer, and even if the resin film functions as a reinforcing film. , it is difficult to apply it to the recent optical devices that are required to be thin.

Patent No. 6366199 Patent No. 6375467 Patent No. 6467551 Japanese Patent Application Publication No. 2005-189530 Japanese Patent Application Publication No. 2009-86675

That is, an object of the present invention is to provide an optical member with a surface protection film that can suppress the protrusion of the processed end of a thin optical member when laser processing the optical member. Another object of the present invention is to provide an optical laminate including such an optical member with a surface protection film. Furthermore, it is an object of the present invention to provide a method for manufacturing an optical device using such an optical member with a surface protection film.

The inventors of the present invention have conducted extensive studies to solve the problem of protrusions at the processed edges when laser processing a thin optical member. As a result, when an optical member with a surface protection film is used, in which a specific surface protection film is bonded to a thin optical member, and the surface protection film is re-peeled after laser processing, the processed edge of the exposed optical member is It was discovered that the protrusions can be suppressed, and the present invention was completed.

[1] The optical member with a surface protection film according to an embodiment of the present invention is an optical member with a surface protection film including a surface protection film (I) and an optical member, and the surface protection film (I) has a base material ( Ia) and an adhesive layer (Ib), the adhesive layer (Ib) and the optical member are directly laminated, the thickness of the optical member is 400 μm or less, and the thickness of the base material (Ia) is is less than 60 μm.
[2] In the optical member with a surface protection film according to [1] above, the pressure-sensitive adhesive layer (Ib) may have a surface hardness of 3.00 MPa or less at 80°C.
[3] In the optical member with a surface protection film according to [1] or [2] above, the pressure-sensitive adhesive layer (Ib) may have a thickness of less than 45 μm.
[4] In the optical member with a surface protection film according to any one of [1] to [3] above, peeling of the adhesive layer (Ib) at a temperature of 23° C. and a relative humidity of 50%. The peeling force against the acrylic plate at an angle of 180° and a tensile speed of 300 mm/min may be less than 0.25 N/25 mm.
[5] In the optical member with a surface protection film according to any one of [1] to [4] above, the optical member is a reinforcing film (II), and the reinforcing film (II) is a base material. (IIa) and an adhesive layer (IIb) may be included.
[6] In the optical member with a surface protection film according to [5] above, the pressure-sensitive adhesive layer (IIb) is peeled at a peeling angle of 180° and a tensile speed of 300 mm/in an environment of a temperature of 23° C. and a relative humidity of 50%. The adhesive force to the polyimide film in minutes may be 3N/25mm or more.
[7] The optical laminate according to the embodiment of the present invention includes the optical member with a surface protection film according to any one of [1] to [6] above.
[8] A method for manufacturing an optical device according to an embodiment of the present invention is a method for manufacturing an optical device including an optical member, in which the optical member with the surface protection film described in [5] or [6] above is combined with another optical member. A step of attaching the surface protection film to a member, a step of performing laser processing by irradiating a laser from the opposite side of the other optical member when viewed from the optical member with the surface protection film, and a step of repeeling the surface protection film after the laser processing. and a step of doing so.

The optical member with a surface protection film according to an embodiment of the present invention can be suitably used in the manufacturing process of an optical device that requires thinning, and when laser processing is performed using the optical member with a surface protection film, after the laser processing Protrusions at the processed end of the optical member exposed by repeeling the surface protection film are suppressed, and the occurrence of defective products can be reduced. Moreover, an optical laminate including such an optical member with a surface protection film can be provided. Furthermore, it is possible to provide a method for manufacturing an optical device using such an optical member with a surface protection film.

1 is a schematic cross-sectional view showing one embodiment of an optical member with a surface protection film according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing one embodiment of an optical laminate according to an embodiment of the present invention. It is a schematic explanatory view explaining a laser processing edge part.

When the expression "mass" is used in this specification, it may be read as "weight", which has conventionally been commonly used as a unit of weight, and conversely, the expression "weight" in this specification If there is, it may be read as "mass", which is commonly used as an SI unit indicating weight.

In this specification, the expression "(meth)acrylic" means "acrylic and/or methacrylic", and the expression "(meth)acrylate" means "acrylate and/or methacrylate". ”, the expression “(meth)allyl” means “allyl and/or methallyl”, and the expression “(meth)acrolein” means “acrolein and/or methacrolein”. It means "Rain".

≪≪1. Optical components with surface protection film≫≫
The optical member with a surface protection film according to an embodiment of the present invention includes a surface protection film (I) and an optical member. The optical member with a surface protection film according to the embodiment of the present invention includes the surface protection film (I) and the optical member, and may contain any other appropriate constituent members as long as the effects of the present invention are not impaired. You can stay there. The optical member with a surface protection film according to the embodiment of the present invention typically includes a surface protection film (I) and an optical member.

The surface protection film (I) includes a base material (Ia) and an adhesive layer (Ib).

In the optical member with a surface protection film according to the embodiment of the present invention, the adhesive layer (Ib) and the optical member are directly laminated.

As the optical member, any suitable optical member may be employed as long as the effects of the present invention are not impaired. Typical examples of the optical member include a reinforcing film and a polarizing plate, since they can further enhance the effects of the present invention.

In one embodiment of the optical member, the optical member is a reinforcing film (II), and the reinforcing film (II) includes a base material (IIa) and an adhesive layer (IIb).

FIG. 1 is a schematic cross-sectional view showing one embodiment of an optical member with a surface protection film according to an embodiment of the present invention. One embodiment of the optical member 1000 with a surface protection film according to an embodiment of the present invention includes a surface protection film (I) 100 and a reinforcing film (II) 200, and the surface protection film (I) 100 includes a base material ( The reinforcing film (II) 200 includes a base material (IIa) 21 and an adhesive layer (IIb) 22, and includes an adhesive layer (Ib) 12 and a base material. (IIa) 21 are directly laminated.

The total thickness of the optical member with a surface protection film according to the embodiment of the present invention is preferably 200 μm to 505 μm, more preferably 210 μm to 455 μm, and even more preferably 220 μm, from the viewpoint of further expressing the effects of the present invention. ~405 μm, particularly preferably 230 μm ~ 350 μm. If the total thickness of the optical member with a surface protection film according to the embodiment of the present invention is out of the above range, there is a possibility that the effects of the present invention may not be exhibited. If the total thickness of the optical member with a surface protection film according to the embodiment of the present invention is too thick outside the above range, it may be difficult to apply it to the manufacturing process of optical devices, for example. If the total thickness of the optical member with the surface protection film according to the embodiment of the present invention is too thin outside the above range, for example, if the optical member is a reinforcing film, the rigidity and impact resistance of other optical members included in the optical device may be affected. There is a possibility that the reinforcing film may not be able to exhibit its original performance of imparting properties.

The optical member with a surface protection film according to the embodiment of the present invention includes the surface protection film (I) and the optical member, and if the adhesive layer (Ib) and the optical member can be directly laminated, the effects of the present invention will be impaired. It can be manufactured by any suitable method to the extent that it is not.

As one embodiment of the method for manufacturing an optical member with a surface protection film according to an embodiment of the present invention, for example, a surface protection film (I) and an optical member are each prepared, and an adhesive layer of the surface protection film (I) is prepared. Examples include a method of bonding (Ib) to an optical member. When the optical member is a reinforcing film (II) and the reinforcing film (II) includes a base material (IIa) and an adhesive layer (IIb), the adhesive layer (Ib) of the surface protection film (I) ) to the base material (IIa) as the outermost layer of the reinforcing film (II).

≪1-1. Surface protection film (I)≫
The surface protection film (I) includes a base material (Ia) and an adhesive layer (Ib). Typically, the base material (Ia) and the adhesive layer (Ib) are directly laminated.

As long as the surface protection film (I) contains the base material (Ia) and the adhesive layer (Ib), it may contain any appropriate other constituent members (Ic) as long as the effects of the present invention are not impaired. You can stay there.

Other constituent members (Ic) include, for example, an easy-adhesion layer, an easy-slip layer, an anti-blocking layer, an antistatic layer, an anti-reflection layer, and an anti-oligomer layer. The number of other constituent members (Ic) may be one type or two or more types.

The thickness of the surface protection film (I) is preferably 25 μm to 105 μm, more preferably 35 μm to 95 μm, still more preferably 40 μm to 85 μm, and particularly preferably is 45 μm to 70 μm. If the thickness of the surface protection film (I) is outside the above range, the effects of the present invention may not be achieved. If the total thickness of the surface protection film (I) is too thick outside the above range, it may be difficult to apply the optical member with the surface protection film according to the embodiment of the present invention to a thin optical device, and When laser processing is performed using the optical member with the surface protection film, there is a possibility that the protrusion at the processed end of the optical member exposed by peeling off the surface protection film again after the laser processing cannot be suppressed. If the thickness of the surface protection film (I) is too thin outside the above range, when laser processing is performed using an optical member with a surface protection film, the surface protection film may be peeled off again after the laser processing and exposed. There is a possibility that the protrusion at the processed end of the optical member cannot be suppressed.

<1-1-a. Base material (Ia)>
The base material (Ia) may have only one layer, or may have two or more layers. The base material (Ia) may be stretched.

The thickness of the substrate (Ia) is preferably less than 60 μm, more preferably less than 55 μm, even more preferably less than 50 μm, particularly preferably less than 45 μm, and most preferably less than 40 μm. The lower limit of the thickness of the base material (Ia) is preferably 24 μm or more, more preferably 27 μm or more, still more preferably 30 μm or more, and particularly preferably 33 μm or more. , most preferably 36 μm or more. If the thickness of the base material (Ia) is within the above range, the effects of the present invention can be more effectively exhibited. If the thickness of the base material (Ia) is outside the above range, the effects of the present invention will be difficult to achieve.For example, when a reinforcing film with a surface protection film is bonded to an optical member and subjected to laser processing, the laser There is a possibility that the surface protection film is peeled off again after processing and the exposed protrusions at the processed edges of the reinforcing film cannot be suppressed.

For example, fatty acid amide, polyethyleneimine, long-chain alkyl additives, etc. may be added to the surface of the base material (Ia) opposite to the adhesive layer (Ib) to the extent that the effects of the present invention are not impaired. A mold treatment may be performed or a coating layer made of any suitable release agent such as silicone-based, long-chain alkyl-based, or fluorine-based release agent may be provided.

As the material for the base material (Ia), any suitable material may be employed as long as the effects of the present invention are not impaired. Such materials include, for example, plastic, paper, metal film, and nonwoven fabric, with plastic being preferred. That is, the base material (Ia) is preferably a plastic film. The base material (Ia) may be composed of one type of material, or may be composed of two or more types of materials. For example, it may be made of two or more types of plastics.

Examples of the plastics include polyester resins, polyamide resins, polyolefin resins, and the like. Examples of the polyester resin include polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. Examples of the polyolefin resin include homopolymers of olefin monomers and copolymers of olefin monomers. Specific examples of polyolefin resins include, for example, homopolypropylene; block, random, and graft propylene copolymers containing ethylene as a copolymerization component; reactor TPO; low density, high density, and linear Ethylene-based polymers with low density or ultra-low density; ethylene/propylene copolymer, ethylene/vinyl acetate copolymer, ethylene/methyl acrylate copolymer, ethylene/ethyl acrylate copolymer, ethylene/acrylic acid Examples include ethylene copolymers such as butyl copolymers, ethylene/methacrylic acid copolymers, and ethylene/methyl methacrylate copolymers.

The base material (Ia) may contain any suitable additives as necessary. Examples of additives that can be contained in the base material (Ia) include antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, fillers, and pigments. The type, number, and amount of additives that can be contained in the base material (Ia) can be appropriately set depending on the purpose. In particular, when the material of the base material (Ia) is plastic, it is preferable to contain some of the above additives for the purpose of preventing deterioration and the like. From the viewpoint of improving weather resistance, particularly preferred additives include antioxidants, ultraviolet absorbers, light stabilizers, and fillers.

Any suitable antioxidant can be employed as the antioxidant. Examples of such antioxidants include phenolic antioxidants, phosphorus-based processing heat stabilizers, lactone-based processing heat stabilizers, sulfur-based heat stabilizers, and phenol/phosphorus-based antioxidants. The content ratio of the antioxidant is preferably 1 to the base resin of the base material (Ia) (if the base resin forming the base material (Ia) is a blend, the blend is the base resin). It is not more than 0.5% by weight, more preferably not more than 0.5% by weight, and even more preferably from 0.01% to 0.2% by weight.

Any suitable ultraviolet absorber can be employed as the ultraviolet absorber. Examples of such UV absorbers include benzotriazole UV absorbers, triazine UV absorbers, and benzophenone UV absorbers. The content ratio of the ultraviolet absorber is preferably based on the base resin forming the base material (Ia) (if the base resin forming the base material (Ia) is a blend, the blend is the base resin). is 2% by weight or less, more preferably 1% by weight or less, and still more preferably 0.01% to 0.5% by weight.

Any suitable light stabilizer may be employed as the light stabilizer. Examples of such light stabilizers include hindered amine light stabilizers and benzoate light stabilizers. The content ratio of the light stabilizer is preferably based on the base resin forming the base material (Ia) (if the base resin forming the base material (Ia) is a blend, the blend is the base resin). is 2% by weight or less, more preferably 1% by weight or less, and still more preferably 0.01% to 0.5% by weight.

Any suitable filler can be used as the filler. Examples of such fillers include inorganic fillers. Specific examples of the inorganic filler include carbon black, titanium oxide, zinc oxide, and the like. The content ratio of the filler is preferably based on the base resin forming the base material (Ia) (if the base resin forming the base material (Ia) is a blend, the blend is the base resin). It is 20% by weight or less, more preferably 10% by weight or less, and even more preferably 0.01% to 10% by weight.

Further, as additives, inorganic, low molecular weight and high molecular weight antistatic agents such as surfactants, inorganic salts, polyhydric alcohols, metal compounds, and carbon, for the purpose of imparting antistatic properties, are also preferably mentioned. In particular, high molecular weight antistatic agents and carbon are preferred from the viewpoint of preventing staining and maintaining tackiness.

<1-1-b. Adhesive layer (Ib)>
The adhesive layer (Ib) may have only one layer, or may have two or more layers.

The thickness of the adhesive layer (Ib) is preferably less than 45 μm, more preferably 1 μm to 40 μm, even more preferably 2 μm to 35 μm, particularly preferably 3 μm to 30 μm, and most preferably 5 μm to 25 μm. It is. If the thickness of the adhesive layer (Ib) is within the above range, the effects of the present invention can be more effectively exhibited. If the thickness of the adhesive layer (Ib) is out of the above range, the effects of the present invention will be difficult to exhibit. For example, when laser processing is performed using an optical member with a surface protection film, the surface There is a possibility that the protrusion at the processed end of the optical member exposed by peeling off the protective film again cannot be suppressed.

The surface hardness of the adhesive layer (Ib) at 80° C. is preferably 3.00 MPa or less, more preferably 2.00 MPa or less, still more preferably 1.00 MPa or less, particularly preferably 0.0 MPa or less. It is 80 MPa or less, most preferably 0.60 MPa or less. The lower limit of the surface hardness is preferably 0.05 MPa or more, more preferably 0.10 MPa or more, even more preferably 0.15 MPa or more, particularly preferably 0.18 MPa or more. If the surface hardness of the adhesive layer (Ib) at 80° C. is within the above range, the effects of the present invention can be more effectively exhibited. If the surface hardness falls outside of the above range, the effects of the present invention will be difficult to achieve.For example, when laser processing is performed using an optical member with a surface protection film, the surface protection film may be reused after the laser processing. There is a possibility that the protrusion at the processed end of the optical member that is peeled off and exposed cannot be suppressed.

The adhesive layer (Ib) preferably has a peel force against the acrylic plate of less than 0.25 N/25 mm at a peel angle of 180 degrees and a tensile speed of 300 mm/min in an environment of 23° C. and 50% relative humidity, More preferably, it is less than 0.23 N/25 mm, still more preferably less than 0.22 N/25 mm, particularly preferably less than 0.21 N/25 mm, and most preferably less than 0.20 N/25 mm. The lower limit of the peeling force against the acrylic plate is preferably 0.01N/25mm or more, more preferably 0.02N/25mm or more, still more preferably 0.03N/25mm or more, and particularly preferably 0.04N. /25mm or more. If the peeling force against the acrylic plate is within the above range, the surface protection film can be easily re-peeled from the surface protection film-attached optical member according to the embodiment of the present invention.

Any suitable adhesive may be used as the adhesive constituting the adhesive layer (Ib) as long as the effects of the present invention are not impaired. The adhesive constituting the adhesive layer is preferably an acrylic adhesive in that it can more effectively exhibit the effects of the present invention.

Acrylic adhesives are formed from acrylic adhesive compositions.

An acrylic adhesive may thus be defined as being formed from an acrylic adhesive composition. This is because acrylic adhesives become acrylic adhesives when the acrylic adhesive composition undergoes a crosslinking reaction through heating or UV irradiation, so acrylic adhesives can be directly identified by their structure. Because there are circumstances in which it is impossible and almost impractical ("impossible/impractical circumstances"), acrylic adhesive compositions are This appropriately specifies the system adhesive as a "thing".

The adhesive layer (Ib) can be formed by any suitable method. As such a method, for example, the adhesive composition forming the adhesive constituting the adhesive layer is applied onto the base material (Ia), heated and dried as necessary, and cured as necessary. A method of forming an adhesive layer (Ib) on the substrate (Ia) by applying the adhesive composition forming the adhesive constituting the adhesive layer (Ib) to any suitable film such as a release liner. The adhesive layer (Ib) is formed on the adhesive layer (Ib) by applying heat and drying as necessary, and curing as necessary. ) is bonded and transferred to form an adhesive layer (Ib) on the base material (Ia).

As a means for applying the pressure-sensitive adhesive composition, any appropriate means may be employed as long as the effects of the present invention are not impaired. Examples of such application methods include roll coating, gravure roll coating, reverse roll coating, kiss roll coating, dip roll coating, bar coating, roll brush coating, spray coating, and knife coating. method, air knife coating method, comma coating method, direct coating method, and die coating method.

Any suitable means may be used for heating and drying the adhesive composition as long as the effects of the present invention are not impaired. Examples of such heating and drying methods include heating to 60° C. to 180° C. and aging treatment at about room temperature.

Any suitable means may be used for curing the pressure-sensitive adhesive composition as long as the effects of the present invention are not impaired. Examples of such curing means include heat, ultraviolet irradiation, laser beam irradiation, α-ray irradiation, β-ray irradiation, γ-ray irradiation, X-ray irradiation, and electron beam irradiation.

The acrylic pressure-sensitive adhesive composition preferably contains an acrylic polymer (A) in that it can better express the effects of the present invention.

The acrylic polymer (A) can be referred to as a so-called base polymer in the field of acrylic adhesives. The number of acrylic polymers (A) may be one, or two or more.

The content of the acrylic polymer (A) in the acrylic adhesive composition is preferably 60% to 99.9% by weight, more preferably 65% to 99.9% by weight in terms of solid content. It is more preferably 70% to 99.9% by weight, particularly preferably 75% to 99.9% by weight, and most preferably 80% to 99.9% by weight.

As the acrylic polymer (A), any suitable acrylic polymer may be used as long as the effects of the present invention are not impaired.

The weight average molecular weight of the acrylic polymer (A) is preferably from 300,000 to 2,500,000, more preferably from 350,000 to 2,000,000, and even more preferably from 400,000 to 2,500,000, in order to better express the effects of the present invention. ~1,500,000, particularly preferably 450,000~1,000,000.

The acrylic polymer (A) is preferably a (meth)acrylic acid alkyl ester (component a) in which the alkyl group in the alkyl ester moiety has 4 to 12 carbon atoms, in order to better exhibit the effects of the present invention. and at least one type (component b) selected from the group consisting of (meth)acrylic acid ester and (meth)acrylic acid having an OH group. be. The a component and the b component may be each independently one type or two or more types.

The number of carbon atoms in the alkyl group in the alkyl ester part of the (meth)acrylic acid alkyl ester (component a) is from 4 to 12 carbon atoms in the alkyl group in the alkyl ester part, in that the effect of the present invention can be further expressed. The number is preferably 4 to 10, more preferably 4 to 9, and even more preferably 4 to 8.

Examples of (meth)acrylic acid alkyl esters in which the alkyl group in the alkyl ester moiety has 4 to 12 carbon atoms include n-butyl (meth)acrylate, isobutyl (meth)acrylate, and s-(meth)acrylate. Butyl, t-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, (meth)acrylate ) isooctyl acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, decyl (meth)acrylate, isodecyl (meth)acrylate, undecyl (meth)acrylate, and dodecyl (meth)acrylate. Among these, n-butyl (meth)acrylate and 2-ethylhexyl (meth)acrylate are preferred, and more preferably n-butyl acrylate and acrylic 2-ethylhexyl acid.

The content of the (meth)acrylic acid alkyl ester (component a) in which the alkyl group in the alkyl ester moiety has 4 to 12 carbon atoms is selected from the viewpoint of enhancing the effect of the present invention. It is preferably 30% by weight or more, more preferably 50% to 99% by weight, even more preferably 70% to 98% by weight, and especially Preferably it is 80% to 98% by weight, most preferably 90% to 98% by weight.

Examples of (meth)acrylic esters having an OH group include (meth)acrylic esters having an OH group such as hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and hydroxybutyl (meth)acrylate. can be mentioned. Among these, hydroxyethyl (meth)acrylate is preferred, and hydroxyethyl acrylate is more preferred, in that it can more effectively exhibit the effects of the present invention.

As the (meth)acrylic acid, acrylic acid is preferred since it can further enhance the effects of the present invention.

The content of at least one type (component b) selected from the group consisting of (meth)acrylic acid ester and (meth)acrylic acid having an OH group is selected from the acrylic polymer ( It is preferably 1% by weight or more, more preferably 1% to 30% by weight, even more preferably 2% to 20% by weight, based on the total amount (100% by weight) of the monomer components constituting A). The content is particularly preferably 3% to 10% by weight.

The total amount of component a and component b with respect to the total amount (100% by weight) of the monomer components constituting the acrylic polymer (A) is preferably 50% to 100% by weight in order to better express the effects of the present invention. and more preferably 70% to 100% by weight, still more preferably 90% to 100% by weight, particularly preferably 95% to 100% by weight, and most preferably 98% to 100% by weight. Weight%.

The composition (M) may contain copolymerizable monomers other than component a and component b. The number of copolymerizable monomers may be one, or two or more.

The content of copolymerizable monomers other than component a and component b with respect to the total amount (100% by weight) of the monomer components constituting the acrylic polymer (A) is preferably 50%. It is not more than 30% by weight, more preferably not more than 30% by weight, even more preferably not more than 10% by weight, particularly preferably not more than 5% by weight, and most preferably not more than 2% by weight.

Examples of such copolymerizable monomers include itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, and acid anhydrides thereof (for example, acid anhydride group-containing monomers such as maleic anhydride and itaconic anhydride). ) and other carboxyl group-containing monomers (excluding (meth)acrylic acid); (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-methylol(meth)acrylamide, N-methoxymethyl(meth)acrylamide , N-butoxymethyl (meth)acrylamide, N-hydroxyethyl (meth)acrylamide, and other amide group-containing monomers; aminoethyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, t-butyl (meth)acrylate Amino group-containing monomers such as aminoethyl; Epoxy group-containing monomers such as glycidyl (meth)acrylate and methylglycidyl (meth)acrylate; Cyano group-containing monomers such as acrylonitrile and methacrylonitrile; N-vinyl-2-pyrrolidone, Heterocycle-containing vinyl monomers such as (meth)acryloylmorpholine, N-vinylpiperidone, N-vinylpiperazine, N-vinylpyrrole, N-vinylimidazole, vinylpyridine, vinylpyrimidine, and vinyloxazole; sulfonic acids such as sodium vinylsulfonate Group-containing monomers; Phosphoric acid group-containing monomers such as 2-hydroxyethyl acryloyl phosphate; Imide group-containing monomers such as cyclohexylmaleimide and isopropylmaleimide; Isocyanate group-containing monomers such as 2-methacryloyloxyethyl isocyanate; cyclopentyl (meth)acrylate; (Meth)acrylic acid esters having alicyclic hydrocarbon groups such as cyclohexyl (meth)acrylate and isobornyl (meth)acrylate; aromatic esters such as phenyl (meth)acrylate, phenoxyethyl (meth)acrylate, and benzyl (meth)acrylate (Meth)acrylic acid esters having hydrocarbon groups; Vinyl esters such as vinyl acetate and vinyl propionate; Aromatic vinyl compounds such as styrene and vinyltoluene; Olefins and dienes such as ethylene, butadiene, isoprene, and isobutylene; Vinyl Examples include vinyl ethers such as alkyl ethers; vinyl chloride;

As the copolymerizable monomer, polyfunctional monomers may also be employed. The polyfunctional monomer refers to a monomer having two or more ethylenically unsaturated groups in one molecule. As the ethylenically unsaturated group, any suitable ethylenically unsaturated group may be employed as long as the effects of the present invention are not impaired. Examples of such ethylenically unsaturated groups include radically polymerizable functional groups such as a vinyl group, a propenyl group, an isopropenyl group, a vinyl ether group (vinyloxy group), and an allyl ether group (allyloxy group). Examples of polyfunctional monomers include hexanediol di(meth)acrylate, butanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, and neopentyl glycol. Di(meth)acrylate, Pentaerythritol di(meth)acrylate, Pentaerythritol tri(meth)acrylate, Dipentaerythritol hexa(meth)acrylate, Trimethylolpropane tri(meth)acrylate, Tetramethylolmethane tri(meth)acrylate, Allyl Examples include (meth)acrylate, vinyl (meth)acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, and urethane acrylate. The number of such polyfunctional monomers may be one, or two or more.

As the copolymerizable monomer, (meth)acrylic acid alkoxyalkyl ester may also be employed. Examples of the (meth)acrylic acid alkoxyalkyl ester include 2-methoxyethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, methoxytriethylene glycol (meth)acrylate, and 3-(meth)acrylate. Examples include methoxypropyl, 3-ethoxypropyl (meth)acrylate, 4-methoxybutyl (meth)acrylate, and 4-ethoxybutyl (meth)acrylate. There may be only one type of (meth)acrylic acid alkoxyalkyl ester, or two or more types may be used.

Composition (M) may contain any appropriate other components within a range that does not impair the effects of the present invention. Examples of such other components include a polymerization initiator, a chain transfer agent, and a solvent. Any appropriate content may be adopted for the content of these other components within a range that does not impair the effects of the present invention.

As the polymerization initiator, a thermal polymerization initiator, a photopolymerization initiator (photoinitiator), or the like may be employed depending on the type of polymerization reaction. The number of polymerization initiators may be one, or two or more.

A thermal polymerization initiator can be preferably employed when obtaining the acrylic polymer (A) by solution polymerization. Examples of such thermal polymerization initiators include 2,2'-azobisisobutyronitrile (AIBN), 2,2'-azobis-2-methylbutyronitrile, and 2,2'-azobis(2- dimethyl (methylpropionate), 4,4'-azobis-4-cyanovalerianic acid, azobisisovaleronitrile, 2,2'-azobis(2-amidinopropane) dihydrochloride, 2,2'-azobis[2-( 5-Methyl-2-imidazolin-2-yl)propane] dihydrochloride, 2,2'-azobis(2-methylpropionamidine) disulfate, 2,2'-azobis(N,N'-dimethyleneisobutyramidine) ), azo initiators such as 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine] hydrate (VA-057, manufactured by Wako Pure Chemical Industries, Ltd.); potassium persulfate , persulfates such as ammonium persulfate, di(2-ethylhexyl)peroxydicarbonate, di(4-t-butylcyclohexyl)peroxydicarbonate, di-sec-butylperoxydicarbonate, t-butylperoxyneo Decanoate, t-hexyl peroxypivalate, t-butyl peroxypivalate, dilauroyl peroxide, di-n-octanoyl peroxide, 1,1,3,3-tetramethylbutylperoxy-2- Ethylhexanoate, di(4-methylbenzoyl)peroxide, dibenzoylperoxide, t-butylperoxyisobutyrate, 1,1-di(t-hexylperoxy)cyclohexane, t-butylhydroperoxide, Peroxide-based initiators such as hydrogen oxide; redox-based initiators that combine peroxides and reducing agents, such as combinations of persulfates and sodium bisulfite, and peroxides and sodium ascorbate; phenyl-substituted ethane substituted ethane-based initiators such as; aromatic carbonyl compounds;

A photopolymerization initiator can be preferably employed when obtaining the acrylic polymer (A) by active energy ray polymerization. Examples of photopolymerization initiators include benzoin ether photopolymerization initiators, acetophenone photopolymerization initiators, α-ketol photopolymerization initiators, aromatic sulfonyl chloride photopolymerization initiators, and photoactive oxime photopolymerization initiators. agent, benzoin-based photopolymerization initiator, benzyl-based photopolymerization initiator, benzophenone-based photopolymerization initiator, ketal-based photopolymerization initiator, and thioxanthone-based photopolymerization initiator.

Examples of benzoin ether photopolymerization initiators include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethan-1-one, and anisole. Examples include methyl ether. Examples of the acetophenone photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenylketone, 4-phenoxydichloroacetophenone, and 4-(t-butyl). Dichloroacetophenone is mentioned. Examples of the α-ketol photopolymerization initiator include 2-methyl-2-hydroxypropiophenone and 1-[4-(2-hydroxyethyl)phenyl]-2-methylpropan-1-one. Examples of the aromatic sulfonyl chloride photopolymerization initiator include 2-naphthalenesulfonyl chloride. Examples of the photoactive oxime photopolymerization initiator include 1-phenyl-1,1-propanedione-2-(o-ethoxycarbonyl)-oxime. Examples of benzoin-based photopolymerization initiators include benzoin. Examples of the benzyl-based photopolymerization initiator include benzyl. Examples of the benzophenone photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3'-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, and α-hydroxycyclohexylphenyl ketone. Examples of the ketal photopolymerization initiator include benzyl dimethyl ketal. Examples of the thioxanthone-based photopolymerization initiator include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, and dodecylthioxanthone.

The amount of the polymerization initiator used can be set to any appropriate amount within a range that does not impair the effects of the present invention.

The acrylic pressure-sensitive adhesive composition may contain a crosslinking agent. By using a crosslinking agent, the cohesive force of the acrylic pressure-sensitive adhesive can be improved, and the effects of the present invention can be further expressed. The number of crosslinking agents may be one, or two or more.

Examples of crosslinking agents include isocyanate crosslinking agents, epoxy crosslinking agents, silicone crosslinking agents, oxazoline crosslinking agents, aziridine crosslinking agents, silane crosslinking agents, alkyl etherified melamine crosslinking agents, and metal chelate crosslinking agents. , peroxides, etc., and preferably at least one selected from the group consisting of isocyanate-based crosslinking agents, epoxy-based crosslinking agents, and peroxides, since the effects of the present invention can be further expressed. It is a seed.

As the isocyanate-based crosslinking agent, a compound having two or more isocyanate groups (including an isocyanate regenerating polar group in which the isocyanate group is temporarily protected by a blocking agent, quantization, etc.) in one molecule can be used. Examples of the isocyanate-based crosslinking agent include aromatic isocyanates such as tolylene diisocyanate and xylene diisocyanate; alicyclic isocyanates such as isophorone diisocyanate; and aliphatic isocyanates such as hexamethylene diisocyanate.

Examples of the isocyanate-based crosslinking agent include lower aliphatic polyisocyanates such as butylene diisocyanate and hexamethylene diisocyanate; alicyclic isocyanates such as cyclopentylene diisocyanate, cyclohexylene diisocyanate, and isophorone diisocyanate; 2,4-tolylene diisocyanate; , 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenylisocyanate, and other aromatic diisocyanates; trimethylolpropane/tolylene diisocyanate trimer adduct (for example, manufactured by Mitsui Chemicals, trade name: D- 101E), trimethylolpropane/hexamethylene diisocyanate trimer adduct (for example, manufactured by Tosoh Corporation, trade name: Coronate HL), isocyanurate of hexamethylene diisocyanate (for example, manufactured by Tosoh Corporation, trade name: Coronate HX), etc. Isocyanate adduct of D120N), trimethylolpropane adduct of isophorone diisocyanate (for example, Mitsui Chemicals, trade name: Takenate D140N), hexamethylene diisocyanate trimethylolpropane adduct (for example, Mitsui Chemicals, trade name: Takenate D160N); Examples include polyether polyisocyanates, polyester polyisocyanates, and adducts of these with various polyols; polyisocyanates polyfunctionalized with isocyanurate bonds, biuret bonds, allophanate bonds, etc. Among these, aromatic isocyanates and alicyclic isocyanates are preferred since they can achieve both deformability and cohesive force in a well-balanced manner.

As the epoxy crosslinking agent, a polyfunctional epoxy compound having two or more epoxy groups in one molecule can be used. Examples of the epoxy crosslinking agent include N,N,N',N'-tetraglycidyl-m-xylene diamine, diglycidylaniline, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane, 1, 6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, sorbitol polyglycidyl ether, glycerol polyglycidyl ether, penta Erythritol polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitan polyglycidyl ether, trimethylolpropane polyglycidyl ether, adipic acid diglycidyl ester, o-phthalic acid diglycidyl ester, triglycidyl tris(2-hydroxyethyl) isocyanurate, Examples include resorcin diglycidyl ether, bisphenol-S-diglycidyl ether, and epoxy resins having two or more epoxy groups in the molecule. Commercially available epoxy crosslinking agents include, for example, the trade names "Tetrad C" and "Tetrad X" manufactured by Mitsubishi Gas Chemical Co., Ltd.

Examples of peroxides include dibenzoyl peroxide, dicumyl peroxide, di-t-butyl peroxide, di-t-butylperoxy-3,3,5-trimethylcyclohexane, t-butyl hydroperoxide, t-Butylcumyl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxine)hexyne-3, 2,5-dimethyl-2,5-di(benzoylperoxy)hexane, 2,5 -dimethyl-2,5-mono(t-butylperoxy)-hexane, α,α'-bis(t-butylperoxy-m-isopropyl)benzene, di(2-ethylhexyl)peroxydicarbonate, di( 4-t-butylcyclohexyl) peroxydicarbonate, di-sec-butylperoxydicarbonate, t-butylperoxyneodecanoate, t-hexylperoxypivalate, t-butylperoxypivalate, dilauroyl Peroxide, di-n-octanoyl peroxide, 1,1,3,3-tetramethylbutyl peroxy-2-ethylhexanoate, di(4-methylbenzoyl) peroxide, t-butyl peroxyisobutyrate , 1,1-di(t-hexylperoxy)cyclohexane, 1,1-di(t-butylperoxy)cyclohexane, t-butylperoxy-2-ethylhexyl carbonate, t-amylperoxyisopropyl carbonate, Examples include 3,5,5-trimethylhexanoyl peroxide, t-butylperoxy-2-hexanoate, t-butylperoxypivalate, and t-hexylperoxypivalate. Commercially available peroxides include, for example, the "Niper BMT" series and "Niper BW" series manufactured by Nippon Oil & Fats Corporation.

The content of the crosslinking agent in the acrylic pressure-sensitive adhesive composition may be any suitable content within a range that does not impair the effects of the present invention. Such content is, for example, preferably 0.01 parts by weight to 20 parts by weight based on the solid content (100 parts by weight) of the acrylic polymer (A), in order to better express the effects of the present invention. parts by weight, more preferably from 0.01 parts by weight to 18 parts by weight, still more preferably from 0.01 parts by weight to 15 parts by weight, particularly preferably from 0.05 parts by weight to 10 parts by weight.

The acrylic pressure-sensitive adhesive composition may contain any appropriate other components as long as the effects of the present invention are not impaired. Examples of such other components include polymer components other than the acrylic polymer (A), crosslinking accelerators, crosslinking catalysts, silane coupling agents, tackifier resins (rosin derivatives, polyterpene resins, petroleum resins, oil-soluble phenols, etc.). ), antiaging agents, inorganic fillers, organic fillers, metal powders, colorants (pigments, dyes, etc.), foils, ultraviolet absorbers, antioxidants, light stabilizers, nucleating agents, chain transfer agents. , plasticizers, softeners, surfactants, antistatic agents, conductive agents, stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, and catalysts.

≪1-2. Optical components≫
As the optical member, any suitable optical member may be employed as long as the effects of the present invention are not impaired. Typical examples of the optical member include a reinforcing film and a polarizing plate, since they can further enhance the effects of the present invention.

The thickness of the optical member is 400 μm or less, more preferably 5 μm to 350 μm, more preferably 10 μm to 300 μm, and even more preferably 15 μm to 280 μm, in order to better express the effects of the present invention. Particularly preferably from 20 μm to 260 μm, most preferably from 25 μm to 250 μm. If the thickness of the optical member is too thick outside the above range, it may be difficult to apply the optical member with a surface protection film according to the embodiment of the present invention to a thin optical device. If the thickness of the optical member is outside the above range and is too thin, for example, if the optical member is a reinforcing film, the original performance of the reinforcing film to provide rigidity and impact resistance to other optical members included in the optical device may be affected. There is a risk that it will not be possible to express.

In one embodiment of the optical member, the optical member is a reinforcing film (II), and the reinforcing film (II) includes a base material (IIa) and an adhesive layer (IIb). The reinforcing film (II), which is one embodiment of the optical member, will be described below.

The reinforcing film (II) includes a base material (IIa) and an adhesive layer (IIb). In one embodiment, the base material (IIa) and the adhesive layer (IIb) are directly laminated.

As long as the reinforcing film (II) contains the base material (IIa) and the adhesive layer (IIb), it may contain any other appropriate structural member (IIc) as long as it does not impair the effects of the present invention. You can stay there.

Other constituent members (IIc) include, for example, an antistatic layer, an antireflection layer, an antiglare layer, and a hard coat layer. The number of other constituent members (IIc) may be one type or two or more types.

When the optical member is a reinforcing film (II), the thickness of the reinforcing film (II) is preferably 150 μm or less, more preferably 5 μm to 140 μm, in order to better express the effects of the present invention. More preferably 10 μm to 130 μm, still more preferably 15 μm to 120 μm, particularly preferably 20 μm to 110 μm, and most preferably 25 μm to 100 μm. If the thickness of the reinforcing film (II) is too thick outside the above range, it may be difficult to apply the optical member with a surface protection film according to the embodiment of the present invention to a thin optical device. If the thickness of the reinforcing film (II) is outside the above range and is too thin, there is a risk that the reinforcing film will not be able to exhibit its original performance of imparting rigidity and impact resistance to other optical members included in the optical device, for example. There is.

<1-2-a. Base material (IIa)>
The base material (IIa) may have only one layer, or may have two or more layers. The base material (IIa) may be stretched.

The thickness of the base material (IIa) is preferably 4 μm to 100 μm, more preferably 10 μm to 95 μm, still more preferably 15 μm to 90 μm, and particularly preferably 20 μm to 85 μm, most preferably 25 μm to 80 μm. If the thickness of the base material (IIa) is too thick outside the above range, it may be difficult to apply the optical member with a surface protection film according to the embodiment of the present invention to a thin optical device. If the thickness of the base material (IIa) is outside the above range and is too thin, for example, there is a risk that the reinforcing film will not be able to exhibit its original performance of imparting rigidity and impact resistance to other optical members included in the optical device. be.

As the material for the base material (IIa), any suitable material may be employed as long as the effects of the present invention are not impaired. Such materials include, for example, preferably plastics, nonwoven fabrics, paper, metal foils, woven fabrics, rubber, and foams, and preferably plastics. That is, the base material (IIa) is preferably a plastic film. The base material (IIa) may be composed of one type of material, or may be composed of two or more types of materials. For example, it may be made of two or more types of plastics.

Examples of the above-mentioned plastics include acrylic resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and polymethyl methacrylate (PMMA), polycarbonate, triacetyl cellulose (TAC), polysulfone, Polyarylate, polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), polyamide (nylon), wholly aromatic polyamide (aramid), polyimide (PI), polyamide Examples include vinyl chloride (PVC), polyvinyl acetate, polyphenylene sulfide (PPS), fluororesins, polyetheretherketone (PEEK), and cyclic olefin polymers.

Examples of the nonwoven fabric include nonwoven fabrics made of heat-resistant natural fibers such as nonwoven fabrics containing Manila hemp; synthetic resin nonwoven fabrics such as polypropylene resin nonwoven fabrics, polyethylene resin nonwoven fabrics, and ester resin nonwoven fabrics; and the like.

The total light transmittance of the base material (IIa) is preferably 90% or more, more preferably 91% or more, still more preferably 92% or more, and particularly preferably 93% or more. If the total light transmittance of the base material (IIa) is within the above range, there is an advantage that the testability is not easily deteriorated when optical members or electronic members are inspected through the reinforcing film.

The base material (IIa) may be surface-treated. Examples of the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-voltage electric shock exposure, ionizing radiation treatment, and coating treatment with an undercoat.

Examples of organic coating materials include materials described in Plastic Hard Coat Materials II (CMC Publishing, (2004)). Such organic coating materials preferably include urethane-based polymers, more preferably polyacrylic urethanes, polyester urethanes, or precursors thereof. This is because it is easy to apply and apply to the base material layer A1, and a wide variety of materials can be selected from an industrial scale and can be obtained at low cost. Examples of such urethane-based polymers include polymers made of a reaction mixture of an isocyanate monomer and an alcoholic hydroxyl group-containing monomer (for example, a hydroxyl group-containing acrylic compound or a hydroxyl group-containing ester compound). The organic coating material may include optional additives such as chain extenders such as polyamines, anti-aging agents, oxidative stabilizers, and the like.

The base material (IIa) may contain any appropriate additives as necessary. Examples of additives that can be contained in the base material (IIa) include antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, fillers, and pigments. The type, number, and amount of additives that can be contained in the base material (IIa) can be appropriately set depending on the purpose. In particular, when the material of the base material (IIa) is plastic, it is preferable to contain some of the above-mentioned additives for the purpose of preventing deterioration and the like. From the viewpoint of improving weather resistance, particularly preferred additives include antioxidants, ultraviolet absorbers, light stabilizers, and fillers. Furthermore, since it is a preferred embodiment that the base material (IIa) has an antistatic effect, it is also a preferred embodiment that the base material (IIa) contains an antistatic agent.

<1-2-b. Adhesive layer (IIb)>
The pressure-sensitive adhesive layer (IIb) may have only one layer, or may have two or more layers.

The thickness of the adhesive layer (IIb) is preferably 1 μm to 50 μm, more preferably 2 μm to 40 μm, even more preferably 4 μm to 35 μm, particularly preferably 5 μm to 30 μm, and most preferably 7 μm to 30 μm. It is 25 μm. If the thickness of the adhesive layer (IIb) is within the above range, the effects of the present invention can be more effectively exhibited. If the thickness of the adhesive layer (IIb) is too thick outside the above range, it may be difficult to apply the optical member with a surface protection film according to the embodiment of the present invention to a thin optical device. If the thickness of the adhesive layer (IIb) is outside the above range and is too thin, for example, there is a risk that the reinforcing film will not be able to exhibit its original performance of imparting rigidity and impact resistance to other optical members included in the optical device. There is.

The adhesive force of the adhesive layer (IIb) to the polyimide film at a peeling angle of 180° and a tensile speed of 300 mm/min in an environment of a temperature of 23° C. and a relative humidity of 50% is preferably 3 N/25 mm or more, and more Preferably it is 4N/25mm or more, more preferably 5N/25mm or more, particularly preferably 6N/25mm or more. If the adhesive strength to the polyimide film is within the above range, the reinforcing film portion of the optical member with a surface protection film according to the embodiment of the present invention will firmly and reliably permanently adhere to the adherend (typically an optical member). can.

Any suitable adhesive may be used as the adhesive constituting the adhesive layer (IIb) as long as the effects of the present invention are not impaired. Examples of such adhesives include the adhesive described in Japanese Patent No. 6375467 and the photocurable adhesive described in Japanese Patent No. 6467551.

A typical example of the adhesive layer (IIb) is an acrylic adhesive.

Acrylic adhesives are formed from acrylic adhesive compositions.

An acrylic adhesive may thus be defined as being formed from an acrylic adhesive composition. This is because acrylic adhesives become acrylic adhesives when the acrylic adhesive composition undergoes a crosslinking reaction when heated or exposed to ultraviolet light, so acrylic adhesives can be directly identified by their structure. Because there are circumstances in which it is impossible and almost impractical ("impossible/impractical circumstances"), acrylic adhesive compositions are This appropriately specifies the system adhesive as a "thing".

The adhesive layer (IIb) may be formed by any suitable method. As such a method, for example, the adhesive composition forming the adhesive constituting the adhesive layer is applied onto the base material (IIa), heated and dried as necessary, and cured as necessary. A method of forming an adhesive layer (IIb) on the substrate (IIa) by applying the adhesive composition forming the adhesive constituting the adhesive layer (IIb) to any suitable film such as a release liner. The adhesive layer (IIb) is formed on the adhesive layer (IIb) by applying heat and drying as necessary, and curing as necessary. ) is bonded and transferred to form an adhesive layer (IIb) on the base material (IIa).

As a means for applying the pressure-sensitive adhesive composition, any appropriate means may be employed as long as the effects of the present invention are not impaired. Examples of such application methods include roll coating, gravure roll coating, reverse roll coating, kiss roll coating, dip roll coating, bar coating, roll brush coating, spray coating, and knife coating. method, air knife coating method, comma coating method, direct coating method, and die coating method.

Any suitable means may be used for heating and drying the adhesive composition as long as the effects of the present invention are not impaired. Examples of such heating and drying methods include heating to 60° C. to 180° C. and aging treatment at about room temperature.

Any suitable means may be used for curing the pressure-sensitive adhesive composition as long as the effects of the present invention are not impaired. Examples of such curing means include heat, ultraviolet irradiation, laser beam irradiation, α-ray irradiation, β-ray irradiation, γ-ray irradiation, X-ray irradiation, and electron beam irradiation.

The acrylic pressure-sensitive adhesive composition preferably contains an acrylic polymer (B) in that it can better express the effects of the present invention.

The acrylic polymer (B) can be referred to as a so-called base polymer in the field of acrylic adhesives. The number of acrylic polymers (B) may be one, or two or more.

The content of the acrylic polymer (B) in the acrylic adhesive composition is preferably 60% to 99.9% by weight, more preferably 65% to 99.9% by weight in terms of solid content. It is more preferably 70% to 99.9% by weight, particularly preferably 75% to 99.9% by weight, and most preferably 80% to 99.9% by weight.

As the acrylic polymer (B), any suitable acrylic polymer may be employed as long as the effects of the present invention are not impaired.

The weight average molecular weight of the acrylic polymer (B) is preferably from 200,000 to 2,500,000, more preferably from 300,000 to 1,800,000, and even more preferably from 400,000 to 2,500,000, from the viewpoint of further expressing the effects of the present invention. 1,500,000 to 1,500,000, particularly preferably 500,000 to 1,200,000.

The acrylic polymer (B) is preferably formed from monomer components that essentially include a (meth)acrylic acid alkyl ester having a linear or branched alkyl group and a polar group-containing monomer.

There may be only one type of (meth)acrylic acid alkyl ester having a linear or branched alkyl group, or two or more types may be used.

Examples of (meth)acrylic acid alkyl esters having a linear or branched alkyl group include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, ( n-butyl meth)acrylate, isobutyl (meth)acrylate, s-butyl (meth)acrylate, t-butyl (meth)acrylate, pentyl (meth)acrylate, isopentyl (meth)acrylate, (meth) Hexyl acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, (meth)acrylate ) Decyl acrylate, Isodecyl (meth)acrylate, Undecyl (meth)acrylate, Dodecyl (meth)acrylate, Tridecyl (meth)acrylate, Tetradecyl (meth)acrylate, Pentadecyl (meth)acrylate, (Meth) Straight chain or branched alkyl group having 1 to 20 carbon atoms, such as hexadecyl acrylate, heptadecyl (meth)acrylate, octadecyl (meth)acrylate, nonadecyl (meth)acrylate, eicosyl (meth)acrylate, etc. Examples include (meth)acrylic acid alkyl esters having the following. As the (meth)acrylic acid alkyl ester having a linear or branched alkyl group, methyl (meth)acrylate and (meth)acrylic acid 2- At least one selected from ethylhexyl.

The number of polar group-containing monomers may be one, or two or more.

Examples of the polar group-containing monomer include hydroxyl group-containing monomers, nitrogen-containing monomers, epoxy group-containing monomers, sulfonic acid group-containing monomers, phosphoric acid group-containing monomers, and carboxyl group-containing monomers. The polar group-containing monomer is preferably at least one selected from hydroxyl group-containing monomers and nitrogen-containing monomers, since it can more effectively exhibit the effects of the present invention.

It is preferable that the polar group-containing monomer essentially contains a hydroxyl group-containing monomer in order to more effectively exhibit the effects of the present invention.

Examples of hydroxyl group-containing monomers include 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and 6-hydroxy(meth)acrylate. Examples include hexyl, vinyl alcohol, and allyl alcohol. As the hydroxyl group-containing monomer, 2-hydroxyethyl (meth)acrylate is preferably used since it can more effectively exhibit the effects of the present invention.

Examples of nitrogen-containing monomers include (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-methylol(meth)acrylamide, N-methoxymethyl(meth)acrylamide, N-butoxymethyl(meth)acrylamide, N- - Amide group-containing monomers such as hydroxyethyl (meth)acrylamide; monomers having nitrogen-containing heterocycles and N-vinyl groups (nitrogen-containing heterocycle-containing vinyl monomers) (e.g., N-vinyl-2-pyrrolidone, N-vinyl -2-piperidone, N-vinyl-2-caprolactam, N-vinylpiperazine, N-vinylpyrrole, N-vinylimidazole, etc.) and monomers having nitrogen-containing heterocycles and (meth)acryloyl groups (nitrogen-containing heterocycle-containing monomers) (meth)acrylic monomers) (for example, (meth)acryloylmorpholine, etc.) nitrogen-containing heterocycle-containing monomers; (meth)aminoethyl acrylate, dimethylaminoethyl (meth)acrylate, t-butyl (meth)acrylate Examples include amino group-containing monomers such as aminoethyl; cyano group-containing monomers such as acrylonitrile and methacrylonitrile; imide group-containing monomers such as cyclohexylmaleimide and isopropylmaleimide; and isocyanate group-containing monomers such as 2-methacryloyloxyethyl isocyanate. Preferred examples of the nitrogen-containing monomer include N-vinyl-2-pyrrolidone, since it can better exhibit the effects of the present invention.

Examples of the epoxy group-containing monomer include glycidyl (meth)acrylate and methylglycidyl (meth)acrylate.

Examples of the sulfonic acid group-containing monomer include sodium vinyl sulfonate.

Examples of the phosphoric acid group-containing monomer include 2-hydroxyethyl acryloyl phosphate.

Examples of carboxyl group-containing monomers include (meth)acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, and acid anhydrides thereof (for example, acid anhydrides such as maleic anhydride and itaconic anhydride). containing monomers).

The monomer component may contain other copolymerizable monomers. The number of other copolymerizable monomers may be one, or two or more. Examples of other copolymerizable monomers include polyfunctional monomers. Examples of polyfunctional monomers include hexanediol di(meth)acrylate, butanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, and neopentyl glycol. Di(meth)acrylate, Pentaerythritol di(meth)acrylate, Pentaerythritol tri(meth)acrylate, Dipentaerythritol hexa(meth)acrylate, Trimethylolpropane tri(meth)acrylate, Tetramethylolmethane tri(meth)acrylate, Allyl Examples include (meth)acrylate, vinyl (meth)acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, and urethane acrylate.

Examples of copolymerizable monomers other than polyfunctional monomers include (meth)acrylic acid esters having alicyclic hydrocarbon groups such as cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate. ; (meth)acrylic acid esters having aromatic hydrocarbon groups such as phenyl (meth)acrylate, phenoxyethyl (meth)acrylate, and benzyl (meth)acrylate;vinyl esters such as vinyl acetate and vinyl propionate;styrene, vinyl Examples include aromatic vinyl compounds such as toluene; olefins or dienes such as ethylene, butadiene, isoprene, and isobutylene; vinyl ethers such as vinyl alkyl ether; and vinyl chloride.

In the total amount of monomer components forming the acrylic polymer (B), the content of the (meth)acrylic acid alkyl ester having a linear or branched alkyl group is preferable in that the effects of the present invention can be more fully expressed. is 50% to 95% by weight, more preferably 55% to 90% by weight, even more preferably 60% to 85% by weight, particularly preferably 65% to 80% by weight.

In the total amount of monomer components forming the acrylic polymer (B), the content of the polar group-containing monomer is preferably 5% by weight to 50% by weight, more preferably The content is 10% to 45% by weight, more preferably 15% to 40% by weight, particularly preferably 20% to 35% by weight.

When a hydroxyl group-containing monomer is essentially included as a polar group-containing monomer, the content ratio of the hydroxyl group-containing monomer in the total amount of monomer components forming the acrylic polymer (B) may increase the effect of the present invention. In terms of expression, it is preferably 5% to 25% by weight, more preferably 7% to 22% by weight, even more preferably 9% to 20% by weight, and particularly preferably 10% by weight. ~18% by weight.

As the polar group-containing monomer, it is preferable that a carboxyl group-containing monomer is not used, or if it is used, it is used in a small amount. Specifically, the content of the carboxyl group-containing monomer in the total amount of monomer components forming the acrylic polymer (B) is preferably 0% to 5% by weight, more preferably 0% to 3% by weight. It is more preferably 0% to 2% by weight, particularly preferably 0% to 0.5% by weight.

The acrylic polymer (B) can be obtained by polymerizing monomer components using any appropriate polymerization method within a range that does not impair the effects of the present invention. Examples of the polymerization method for obtaining the acrylic polymer (B) include a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, and a polymerization method using active energy ray irradiation (active energy ray polymerization method). Among these, the solution polymerization method and the active energy ray polymerization method are preferred from the viewpoint of productivity.

Solvents used when employing the solution polymerization method include, for example, esters such as ethyl acetate and n-butyl acetate; aromatic hydrocarbons such as toluene and benzene; and aliphatic hydrocarbons such as n-hexane and n-heptane. Examples include organic solvents such as hydrocarbons; alicyclic hydrocarbons such as cyclohexane and methylcyclohexane; ketones such as methyl ethyl ketone and methyl isobutyl ketone; The number of solvents may be one, or two or more.

When polymerizing the monomer components, a polymerization initiator such as a thermal polymerization initiator or a photopolymerization initiator (photoinitiator) is preferably used depending on the type of polymerization reaction. The number of polymerization initiators may be one, or two or more.

Regarding the polymerization initiator, <1-1-b. The explanation regarding the polymerization initiator in the section ``Adhesive Layer (Ib)'' can be used as is.

The acrylic pressure-sensitive adhesive composition preferably contains a crosslinking agent. By using a crosslinking agent, it is possible to provide an acrylic pressure-sensitive adhesive that has sufficient adhesive strength and has little distortion at high temperatures. The number of crosslinking agents may be one, or two or more.

The number of crosslinking agents may be one, or two or more.

The content of the crosslinking agent in the acrylic pressure-sensitive adhesive composition may be any suitable content within a range that does not impair the effects of the present invention. Such a content is, for example, preferably 0.1 parts by weight to 30 parts by weight based on the solid content (100 parts by weight) of the acrylic polymer (B) in order to better express the effects of the present invention. parts by weight, more preferably from 0.3 parts by weight to 25 parts by weight, still more preferably from 0.5 parts by weight to 20 parts by weight, particularly preferably from 0.7 parts by weight to 15 parts by weight, and most preferably from 0.7 parts by weight to 15 parts by weight. Preferably it is 1 part by weight to 10 parts by weight. If the content of the crosslinking agent in the acrylic pressure-sensitive adhesive composition is within the above range based on the solid content (100 parts by weight) of the acrylic polymer (B), it will have more sufficient adhesive strength and will be able to withstand high temperatures. It is possible to provide an acrylic adhesive with less distortion.

Examples of crosslinking agents include isocyanate crosslinking agents, epoxy crosslinking agents, silicone crosslinking agents, oxazoline crosslinking agents, aziridine crosslinking agents, silane crosslinking agents, alkyl etherified melamine crosslinking agents, and metal chelate crosslinking agents. , peroxides, etc., and preferably at least one selected from the group consisting of isocyanate-based crosslinking agents, epoxy-based crosslinking agents, and peroxides, since the effects of the present invention can be further expressed. It is a seed.

For specific explanations of isocyanate crosslinking agents, epoxy crosslinking agents, and peroxides, see <1-1-b. The explanation regarding the polymerization initiator in the section ``Adhesive Layer (Ib)'' can be used as is.

The acrylic pressure-sensitive adhesive composition may contain any appropriate other components as long as the effects of the present invention are not impaired. Such other components include, for example, <1-1-b. The explanation regarding other components in the section ``Adhesive Layer (Ib)'' can be used as is.

≪≪2. Optical laminate≫≫
An optical laminate according to an embodiment of the present invention includes an optical member with a surface protection film according to an embodiment of the present invention. The optical laminate according to the embodiment of the present invention more preferably includes the optical member with the surface protection film according to the embodiment of the present invention and other optical members.

FIG. 2 shows one embodiment of an optical laminate of the present invention, and an optical laminate 3000 includes an optical member 1000 with a surface protection film and another optical member 2000, and the optical member 1000 with a surface protection film includes: Contains a surface protection film (I) 100 and a reinforcing film (II) 200.

As long as the optical laminate according to the embodiment of the present invention includes the optical member with a surface protection film according to the embodiment of the present invention, it may contain any other suitable layer as long as the effect of the present invention is not impaired. Good too.

Examples of other layers include glass, displays, imaging devices, lenses, and (half) mirrors.

The total thickness of the optical laminate according to the embodiment of the present invention may be any suitable thickness depending on the types of other optical members. Typically, the total thickness of optical laminates according to embodiments of the invention is preferably from 115 μm to 650 μm, more preferably from 120 μm to 600 μm, even more preferably from 125 μm to 550 μm, particularly preferably from 130 μm to It is 500 μm.

Examples of other optical members include polarizing plates, polyimide films, wavelength plates, retardation plates, optical compensation films, brightness enhancement films, light diffusion sheets, and reflective sheets.

The thickness of the other optical members may be any appropriate thickness depending on the type thereof. Typically, the thickness of the other optical member is preferably 5 μm to 400 μm, more preferably 10 μm to 350 μm, even more preferably 15 μm to 300 μm, particularly preferably 20 μm to 250 μm.

≪≪3. Method for manufacturing optical devices≫≫
A method for manufacturing an optical device according to an embodiment of the present invention is a method for manufacturing an optical device including an optical member, and uses an optical member with a surface protection film according to an embodiment of the present invention and another optical member.

Regarding other optical members, see <<<2. The explanation regarding other optical members in the section ``Optical laminate >>'' can be used as is.

A method for manufacturing an optical device according to an embodiment of the present invention includes a step of laminating an optical member with a surface protection film according to an embodiment of the present invention to another optical member (hereinafter referred to as step I), A step of performing laser processing by irradiating a laser from the opposite side of the other optical member when viewed from the member (hereinafter referred to as step II), and a step of repeeling the surface protection film after the laser processing (hereinafter referred to as Step III).

In step I, the optical member side of the optical member with the surface protection film according to the embodiment of the present invention is bonded to another optical member to which the optical member with the surface protection film is to be bonded. Thereby, for example, an optical laminate in which a surface protection film, an optical member, and another optical member are laminated in this order is obtained.

Thereafter, in Step II, laser processing is performed by irradiating the optical laminate obtained in Step I with a laser from the surface protection film side. In this case, a cut surface is provided in the optical laminate by laser irradiation, and the optical member with a surface protection film (a laminate of a surface protection film and an optical member) is partially removed from the optical laminate. As a result, a laminate is obtained in which the optical member with the surface protection film is partially adhered onto the other optical member.

Thereafter, in step III, the surface protection film is peeled off again from the laminate obtained in step II, in which the optical member with the surface protection film is partially mounted on the other optical member. As a result, an optical device is obtained in which an optical member is partially bonded onto another optical member.

According to the method for manufacturing an optical device according to the embodiment of the present invention, the processed end portion of the optical member of the obtained optical device is processed using the conventional processing method, that is, the corresponding part of the optical member to which a normal reinforcing film is laminated. There are no protrusions that are observed in a processing method in which laser processing is performed by irradiating a laser from the reinforcing film side.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples in any way. In addition, the test and evaluation methods in Examples and the like are as follows. In addition, when it is written as "parts", it means "parts by weight" unless there are special notes, and when it is written as "%", it means "wt%" unless there are special notes.

<Measurement of weight average molecular weight>
The weight average molecular weight was measured by gel permeation chromatography (GPC). Specifically, measurements were made under the following conditions using a GPC measurement device with the trade name "HLC-8120GPC" (manufactured by Tosoh Corporation), and the values were calculated based on standard polystyrene conversion values.
(Molecular weight measurement conditions)
・Sample concentration: Approximately 2.0 g/L (tetrahydrofuran solution)
・Sample injection volume: 20μL
・Column: Product name “TSKgel, SuperAWM-H+superAW4000+superAW2500” (manufactured by Tosoh Corporation)
・Column size: 6.0 mm each. D. ×150mm
・Eluent: Tetrahydrofuran (THF)
・Flow rate: 0.4mL/min
・Detector: Differential refractometer (RI)
・Column temperature (measurement temperature): 40℃

<Surface hardness of adhesive layer of surface protection film>
The surface hardness of the surface protection films obtained in Examples and Comparative Examples was measured. Peel off the release liner that protects the adhesive surface, use a nanoindenter device (Triboindenter manufactured by Hysitron Inc.) to press an indenter into the adhesive layer surface to a depth of 1 μm, and apply the maximum load as measured by the nanoindenter. (Pmax) [GPa/mm ² ] was obtained. This is expressed as:
Surface hardness [GPa] = Pmax/A
The surface hardness was calculated by substituting The measurement conditions are as follows. In the above formula, A is the projected contact area [mm ² ] of the indenter.
(Measurement condition)
Indenter approach speed: 200nm/s
Maximum displacement: 1μm
Pushing speed: 200nm/s
Pulling speed: 200nm/s
Indenter used: Conical (spherical indenter: radius of curvature 10 μm)
Measurement method: Single indentation measurement Measurement temperature: 80℃

<Peeling force against acrylic board>
The adhesive layer of the surface protection film (width 25 mm x length 140 mm) from which the release liner has been removed is pasted onto the surface of an acrylic plate (Acrylite, manufactured by Mitsubishi Chemical Corporation) using a 2 kg hand roller once and back at 23°C. It was left for 30 minutes at an ambient temperature of .
The evaluation sample obtained as described above was measured using a tensile tester. As the tensile tester, a product name "Autograph AG-Xplus HS 6000 mm/min high speed model (AG-50NX plus)" manufactured by Shimadzu Corporation was used. The evaluation sample was set in the tensile testing machine, and the tensile test was started. Specifically, the load when the surface protection film was peeled off from the acrylic board was measured, and the average load at that time was taken as the peeling force of the surface protection film from the acrylic board (peeling force against the acrylic board). The conditions for the tensile test were: test environment temperature: 23° C., peeling angle: 180 degrees, and peeling speed (tensile speed): 300 mm/min.

<Adhesion strength to polyimide film>
The adhesive layer of the surface protection film (width 25 mm x length 140 mm) from which the release liner has been removed is placed on a glass plate (soda lime glass, manufactured by Matsunami Glass Industries, Ltd.) with a polyimide film (Upilex S, manufactured by Ube Industries, Ltd.). It was attached to the surface of a polyimide film using a 2 kg hand roller once and back and left for 30 minutes at an environmental temperature of 23°C.
The evaluation sample obtained as described above was measured using a tensile tester. As the tensile tester, a product name "Autograph AG-Xplus HS 6000 mm/min high speed model (AG-50NX plus)" manufactured by Shimadzu Corporation was used. The evaluation sample was set in the tensile testing machine, and the tensile test was started. Specifically, the load when the surface protection film was peeled off from the glass plate with the polyimide film was measured, and the average load at that time was taken as the peeling force of the surface protection film from the polyimide film (adhesive force to the polyimide film). . The conditions for the tensile test were: test environment temperature: 23° C., peeling angle: 180 degrees, and peeling speed (tensile speed): 300 mm/min.

<Elevation height of laser processing end>
The laminates obtained in Examples and Comparative Examples were processed using a CO ₂ laser. The laser processing conditions are as follows.
・_CO2 laser wavelength: 9.36μm
・Processing speed: 500mm/sec
・Frequency: 30Hz
- Number of W: Adjusted according to the total thickness of the laminate so that the uncut portion of the processed product remained 7 μm.
Thereafter, using a microscope (BX51 manufactured by OLYMPUS), the height of the protrusion at the laser-processed end was evaluated according to the following procedure. Note that the laser processed end is the end T of the base material portion of the reinforcing film at the laser cut surface, as shown in FIG.
(1) The laminate was cut into 10 mm x 20 mm so that the processed area was centered, and the surface protection film portion of the cut laminate was peeled off.
(2) Thereafter, the laminate with the surface protection film peeled off was stood perpendicularly to the stage, the cross section was observed, and the height of the protrusion at the laser processed end was measured.

[Manufacture example 1]
<Production of acrylic polymer A>
In a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube, and a condenser, as monomers, 2-ethylhexyl acrylate (2EHA): 96 parts by weight, 2-hydroxyethyl acrylate (HEA): 4 parts by weight, 0.2 parts by weight of 2,2'-azobisisobutyronitrile (AIBN) and 150 parts by weight of ethyl acetate were added as polymerization initiators, and nitrogen gas was introduced while stirring gently to reduce the temperature of the liquid in the flask. A polymerization reaction was carried out for 6 hours while maintaining the temperature at around 65° C. to obtain a solution of acrylic polymer A having a weight average molecular weight of 540,000.

[Manufacture example 2]
<Production of acrylic polymer B>
In a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas inlet tube, and a condenser, 95 parts by weight of butyl acrylate (BA) as monomers, 5 parts by weight of acrylic acid (AA), 2 parts by weight as a polymerization initiator, Charge 0.2 parts by weight of 2'-azobisisobutyronitrile and 233 parts by weight of ethyl acetate, introduce nitrogen gas while stirring gently, heat to 60°C, and bring the liquid temperature inside the flask to 60°C. The polymerization reaction was carried out for 7 hours by keeping the temperature close to the 100° C. to obtain a solution of acrylic polymer B having a weight average molecular weight of 600,000.

[Manufacture example 3]
<Manufacture of reinforcing film>
2-ethylhexyl acrylate (2EHA) as monomer components: 63 parts by weight, N-vinyl-2-pyrrolidone (NVP): 15 parts by weight, methyl methacrylate (MMA): 9 parts by weight, 2-hydroxyethyl acrylate ( 13 parts by weight of HEA), 0.2 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 133 parts by weight of ethyl acetate as a polymerization solvent were charged into a separable flask, The mixture was stirred for 1 hour while introducing nitrogen gas. After removing oxygen in the polymerization system in this manner, the temperature was raised to 65° C. and the reaction was carried out for 10 hours. Ethyl acetate was then added to obtain an acrylic polymer solution with a solid content concentration of 30% by weight. The weight average molecular weight of the acrylic polymer in the obtained acrylic polymer solution was 800,000.
Next, an isocyanate crosslinking agent (trade name "Takenate D110N", manufactured by Mitsui Chemicals, Inc.) was added to the above acrylic polymer solution at a rate of 1.1 weight parts per 100 parts by weight of the acrylic polymer (solid content). % of the silane coupling agent (γ-glycidoxypropyltrimethoxysilane, trade name "KBM403", manufactured by Shin-Etsu Chemical Co., Ltd.) per 100 parts by weight of the acrylic polymer (solid content). An acrylic pressure-sensitive adhesive composition was prepared by adding 0.15 parts by weight in terms of solid content and mixing them.
Subsequently, the obtained acrylic adhesive composition was applied to one side of a PET (polyethylene terephthalate) substrate (thickness: 75 μm) to form a coating layer on the PET substrate. Next, the coated layer formed on the PET base material was placed in an oven, and the coated layer was dried at 130° C. for 3 minutes to form a 10 μm thick adhesive layer on one side of the PET base material. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In addition, a reinforcing film was obtained.

[Example 1]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 5 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 50 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 10 μm, and dried at a drying temperature of 130°C. It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In total, a surface protection film (1) was obtained.
The obtained surface protection film (1) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (1), the adhesive layer of the surface protection film (1) was replaced with the reinforcement produced in Production Example 3. It was attached to the base material side of the film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (1).
Laminated body (1) was subjected to laser processing, and the processed edges were evaluated.
The results are shown in Table 1.

[Example 2]
Acrylic polymer B: 100 parts by weight (solid content), 6 parts by weight of a tetrafunctional epoxy compound (Tetrad C: T/C, manufactured by Mitsubishi Gas Chemical Co., Ltd.) as a crosslinking agent were blended, and the total solid content was 15% by weight. The mixture was diluted with ethyl acetate to obtain an acrylic adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 38 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 5 μm, and the drying temperature was 130° C. and the drying time was It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In addition, a surface protection film (2) was obtained.
The obtained surface protection film (2) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (2), the adhesive layer of the surface protection film (2) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (2).
The laminate (2) was subjected to laser processing, and the processed edges were evaluated.
The results are shown in Table 1.

[Example 3]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 5 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 38 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 10 μm, and the drying temperature was 130° C. and the drying time. It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In total, a surface protection film (3) was obtained.
The obtained surface protection film (3) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (3), the adhesive layer of the surface protection film (3) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (3).
Laser processing was performed on the laminate (3), and the processed edges were evaluated.
The results are shown in Table 1.

[Example 4]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 4 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 38 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying was 20 μm, and the drying temperature was 130° C. and the drying time was It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In total, a surface protection film (4) was obtained.
The obtained surface protection film (4) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (4), the adhesive layer of the surface protection film (4) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (4).
Laser processing was performed on the laminate (4), and the processed edges were evaluated.
The results are shown in Table 1.

[Example 5]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 4 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Co., Ltd.) as a catalyst 0 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 38 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying was 21 μm, and the drying temperature was 130° C. and the drying time was It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In total, a surface protection film (5) was obtained.
The obtained surface protection film (5) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (5), the adhesive layer of the surface protection film (5) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (5).
The laminate (5) was subjected to laser processing, and the processed edges were evaluated.
The results are shown in Table 1.

[Example 6]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 4 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 38 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 10 μm, and the drying temperature was 130° C. and the drying time. It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In total, a surface protection film (6) was obtained.
The obtained surface protection film (6) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (6), the adhesive layer of the surface protection film (6) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (6).
Laser processing was performed on the laminate (6), and the processed edges were evaluated.
The results are shown in Table 1.

[Comparative example 1]
After peeling off the release liner of the reinforcing film produced in Production Example 3, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (C1).
Laser processing was performed on the laminate (C1), and the processed edges were evaluated.
The results are shown in Table 1.

[Comparative example 2]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 5 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 100 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 10 μm, and the drying temperature was 130° C. and the drying time. It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In addition, a surface protection film (C2) was obtained.
The obtained surface protection film (C2) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (C2), the adhesive layer of the surface protection film (C2) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (C2).
The laminate (C2) was subjected to laser processing, and the processed edges were evaluated.
The results are shown in Table 1.

[Comparative example 3]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 5 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 75 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 10 μm, and the drying temperature was 130° C. and the drying time. It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In addition, a surface protection film (C3) was obtained.
The obtained surface protection film (C3) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (C3), the adhesive layer of the surface protection film (C3) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (C3).
Laser processing was performed on the laminate (C3), and the processed edges were evaluated.
The results are shown in Table 1.

[Comparative example 4]
Acrylic polymer A: 100 parts by weight (solid content), isocyanate compound (Coronate HX: C/HX, manufactured by Nippon Polyurethane Co., Ltd.) as a crosslinking agent: 4 parts by weight, Enbilizer OL-1 (manufactured by Tokyo Fine Chemical Company) as a catalyst: 0.03 parts by weight was mixed and diluted with ethyl acetate so that the total solid content was 20% by weight to obtain an acrylic pressure-sensitive adhesive composition.
The obtained acrylic adhesive composition was applied to a polyethylene terephthalate film (trade name "T100", thickness 75 μm, manufactured by Mitsubishi Chemical Corporation) so that the thickness after drying would be 10 μm, and the drying temperature was 130° C. and the drying time. It was cured and dried for 30 seconds to produce a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive. Next, the silicone-treated side of a polyethylene terephthalate film (trade name "MRF25", thickness 25 μm, manufactured by Mitsubishi Chemical Corporation), which had been silicone-treated on one side, was pasted on the surface of the obtained adhesive layer as a release liner. In addition, a surface protection film (C4) was obtained.
The obtained surface protection film (C4) was aged for 5 days at room temperature, and after peeling off the release liner of the surface protection film (C4), the adhesive layer of the surface protection film (C4) was replaced with the reinforcement produced in Production Example 3. It was attached to a commercial film. Furthermore, after peeling off the release liner of the reinforcing film, it was bonded to a 25 μm thick polyimide film (“Upilex S” manufactured by Ube Industries) to obtain a laminate (C4).
Laser processing was performed on the laminate (C4), and the processed edges were evaluated.
The results are shown in Table 1.

The optical member with a surface protection film of the present invention can be suitably used to impart rigidity and impact resistance to an optical member included in an optical device that is required to be thin. The optical laminate of the present invention can be suitably used in optical devices that are required to be thin. The method for manufacturing an optical device of the present invention can be used for manufacturing a high-quality optical device that is required to be thin.

1000 Optical member with surface protection film 2000 Other optical members 3000 Optical laminate 100 Surface protection film (I)
200 Reinforcing film (II)
11 Base material (Ia)
12 Adhesive layer (Ib)
21 Base material (IIa)
22 Adhesive layer (IIb)
T Edge of base material portion of reinforcing film at laser cut surface

Claims (8)

An optical member with a surface protection film including a surface protection film (I) and an optical member,
The surface protection film (I) includes a base material (Ia) and an adhesive layer (Ib),
The adhesive layer (Ib) and the optical member are directly laminated,
The thickness of the optical member is 400 μm or less,
The thickness of the base material (Ia) is less than 60 μm.
Optical components with surface protection film. The optical member with a surface protection film according to claim 1, wherein the adhesive layer (Ib) has a surface hardness of 3.00 MPa or less at 80°C. The optical member with a surface protection film according to claim 1, wherein the adhesive layer (Ib) has a thickness of less than 45 μm. The adhesive layer (Ib) has a peeling force against the acrylic plate of less than 0.25 N/25 mm at a peeling angle of 180° and a tensile speed of 300 mm/min in an environment of a temperature of 23° C. and a relative humidity of 50%. The optical member with a surface protection film according to claim 1. The optical member with a surface protection film according to claim 1, wherein the optical member is a reinforcing film (II), and the reinforcing film (II) includes a base material (IIa) and an adhesive layer (IIb). Claim: The adhesive layer (IIb) has an adhesive force to the polyimide film of 3 N/25 mm or more at a peeling angle of 180° and a tensile speed of 300 mm/min in an environment of a temperature of 23° C. and a relative humidity of 50%. 5. The optical member with a surface protection film according to 5. An optical laminate comprising the optical member with a surface protection film according to any one of claims 1 to 6. A method for manufacturing an optical device including an optical member, the method comprising:
A step of bonding the optical member with a surface protection film according to claim 5 or 6 to another optical member,
performing laser processing by irradiating a laser from the opposite side of the other optical member when viewed from the optical member with the surface protection film;
repeeling the surface protection film after the laser processing;
including,
Method for manufacturing optical devices.