Curable adhesive composition, adhesive sheet using curable adhesive composition, laminate including adhesive sheet using curable adhesive composition, and production method for laminate including adhesive sheet using curable adhesive composition
A manufacturing method and adhesive layer technology, applied in the direction of chemical instruments and methods, adhesives, adhesive types, etc., can solve problems such as damage to components of liquid crystal display devices, restrictions on applicable components, and long-term aging
Active Publication Date: 2020-10-23
DIC CORP
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
As a result, the adhesive after the lamination process needs to be matured for a long time until sufficient bonding strength is developed.
[0007] As a method of accelerating the curing of the adhesive after the lamination process, heat curing of the adhesive under high-temperature conditions has been considered, but there is a possibility that the heat during curing may damage the components of the liquid crystal display device. doubt
In addition, due to the difference in thermal expansion of each member, the strain between the members during cooling causes deformation of the members, or cracks and peeling between the joining material and the members, and there are problems in the joining method using an adhesive. Subject
[0008] In addition, in order to shorten the curing time, if an adhesive with excellent curability at room temperature is used, the construction time required for the lamination process cannot be ensured, and the curing has already progressed before lamination, so it is sometimes difficult to There may be cases where sufficient bonding strength cannot be exhibited
[0009] In addition, as for the method of completing curing at a low temperature and in a short time, although a bonding method using light irradiation has been studied, it cannot be used for members that cannot transmit light, and the applicable members are limited, making it difficult to put it into practical use.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0223] 100 parts by mass of the urethane resin (B'-1), 43 parts by mass of CEL-2021P (manufactured by DAICEL, cycloaliphatic epoxy resin), 43 parts by mass of CPI-100P (manufactured by San-Apro, sulfonium salt) system, solid content concentration 50%) 11.4 mass parts were mixed and stirred, and the non-volatile content was adjusted to 75 mass % by adding methyl ethyl ketone, and the adhesive composition (a-1) was obtained.
[0224] Then, the adhesive composition (a-1) was coated on a release liner (a polyethylene terephthalate film with a thickness of 50 μm applied on one side with a silicone compound) using a rod-shaped metal applicator. The surface of the treated person) was peeled off so that the thickness after drying was 100 μm.
[0225] Then, the coating was put into a dryer at 85° C. to dry for 5 minutes, and a release liner (a single side of a polyethylene terephthalate film with a thickness of 38 μm) was pasted on one side of the dried coating. The surface was peeled...
Embodiment 2
[0227] In addition to using the urethane resin (B'-2) instead of the urethane resin (B'-1), an adhesive sheet with a thickness of 100 μm was obtained in the same manner as in Example 1 ( X-2).
Embodiment 3
[0229] In addition to using the urethane resin (B'-3) instead of the urethane resin (B'-1), an adhesive sheet with a thickness of 100 μm was obtained in the same manner as in Example 1 ( X-3).
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Abstract
The present invention addresses the problem of providing: a curable adhesive composition that makes it possible for application to be completed and bonding to be achieved in a short period of time, even at low temperatures, and can favorably bond two or more adherends that do not transmit active energy rays and have rough or uneven surfaces; an adhesive sheet that uses the curable adhesive composition; a laminate that includes the adhesive sheet; and a production method for the laminate. The present invention relates to: a curable adhesive composition that is for bonding two or more adherendsthat have surfaces that do not transmit active energy rays and that contains a photocurable resin (A), a thermoplastic resin (B), and a photopolymerization initiator, the photocurable resin (A) and the thermoplastic resin (B) including a polymerizable functional group that is not a polymerizable unsaturated double bond; an adhesive sheet that uses the curable adhesive composition; a laminate thatincludes the adhesive sheet; and a production method for the laminate.
Description
technical field [0001] The present invention relates to a curable adhesive composition that can be used for lamination of adherends that are difficult to transmit active energy rays, an adhesive sheet using the composition, a laminate including the adhesive sheet, and a method for producing the same. Background technique [0002] In recent years, liquid crystal display devices have been widely used as display devices for televisions, smartphones, personal assistant devices (PADs), tablet computers, car navigation systems, and the like. [0003] The liquid crystal display device is generally known to have a structure in which a liquid crystal display panel, a planar lighting device (backlight device) for illuminating the liquid crystal display panel, Circuit boards (substrates), chassis on which other electronic components are mounted, heat sinks that dissipate heat generated by components, etc. [0004] In order to laminate the members of the liquid crystal display device, ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C09J201/00B32B27/00C09J7/30C09J11/06C09J175/04C09J175/06C09J175/08
CPCB32B27/00C09J7/00C09J11/06C09J175/04C09J175/06C09J175/08C09J201/00
Inventor 谷井翔太森野彰规金川善典
Owner DIC CORP