OCA optical adhesive and preparation method thereof

An optical adhesive and optical adhesive layer technology, applied in the field of optical adhesives, can solve the problems such as affecting the OCA optical adhesive's properties such as slight tensile shrinkage and thermal shock resistance, large internal stress in the OCA adhesive layer, and difficulty in discharging monomers. , to achieve the effect of promoting the light curing process, solving the incomplete curing, and improving the curing effect and efficiency

Active Publication Date: 2018-02-02
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the thickness of the OCA adhesive layer is required to be thick, it is easy to have incomplete curing. When the curing process extends from the surface of the OCA adhesive layer to the inner layer, it is easy to appear that some monomers are not easy to discharge, especially OCA. Uneven internal curing of the adhesive layer can easily lead to excessive internal stress of the OCA adhesive layer, which in turn affects the tensile strength, shrinkage rate after curing, and thermal shock resistance of the OCA optical adhesive.

Method used

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  • OCA optical adhesive and preparation method thereof
  • OCA optical adhesive and preparation method thereof
  • OCA optical adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An OCA optical adhesive, comprising a light-release film layer 1, an OCA optical adhesive layer 2 and a heavy-release film layer 3 that are laminated sequentially from top to bottom, and the OCA optical adhesive layer 2 includes a laminated film layer from top to bottom The surface layer 21, the middle layer 22 and the inner layer 23, the upper surface of the surface layer 21 is attached to the lower surface of the light release film layer 1, and the lower surface of the inner layer 23 is bonded to the heavy release film layer The upper surface of 3 fits.

[0039] The light release film layer 1 is a PET release film with a release force of 5g / f; the heavy release film layer 3 is a PET release film with a release force of 30g / f; the surface layer 21 and the inner layer The Shore hardness of the layers 23 is 10A, and the Shore hardness of the intermediate layer 22 is 20A.

[0040] The thickness of the light release film layer 1 is 50 μm, the thickness of the heavy releas...

Embodiment 2

[0057] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0058] The light release film layer 1 is a PET release film with a release force of 8g / f; the heavy release film layer 3 is a PET release film with a release force of 45g / f; the surface layer 21 and the inner layer The Shore hardness of the layers 23 is 12A, and the Shore hardness of the intermediate layer 22 is 22A.

[0059] The thickness of the light release film layer 1 is 60 μm, the thickness of the heavy release film layer 3 is 88 μm; the thickness of the surface layer 21 and the inner layer 23 are both 57 μm, and the thickness of the middle layer 22 is 35 μm.

[0060] The middle layer 22 is made of the first acrylate glue, and the first acrylate glue includes the following raw materials in parts by weight:

[0061]

[0062] The photoinitiator is an α-hydroxy ketone photoinitiator, and the co-initiator is triethanolamine.

[0063] Both the surface layer 21 and the inner layer 23 ...

Embodiment 3

[0075] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0076] The light release film layer 1 is a PET release film with a release force of 12g / f; the heavy release film layer 3 is a PET release film with a release force of 65g / f; the surface layer 21 and the inner layer The Shore hardness of the layers 23 is 15A, and the Shore hardness of the middle layer 22 is 25A.

[0077] The thickness of the light release film layer 1 is 75 μm, the thickness of the heavy release film layer 3 is 100 μm; the thickness of the surface layer 21 and the inner layer 23 are both 65 μm, and the thickness of the middle layer 22 is 50 μm.

[0078] The middle layer 22 is made of the first acrylate glue, and the first acrylate glue includes the following raw materials in parts by weight:

[0079]

[0080]

[0081] The photoinitiator is an alpha-hydroxy ketone photoinitiator, the auxiliary initiator is triethanolamine; the polymerization inhibitor is a quinone po...

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Abstract

The invention relates to the technical field of optical adhesives, in particular to an OCA optical adhesive and a preparation method thereof. The OCA optical adhesive comprises a light release film, an OCA optical adhesive layer and a heavy release film sequentially fitted from top to bottom, the OCA optical adhesive layer comprises a surface layer, a middle layer and an inside layer sequentiallyfitted from top to bottom, the upper surface of the surface layer is fitted to the lower surface of the light release layer, and the lower surface of the inside layer is fitted to the upper surface ofthe heavy release layer. The OCA optical adhesive has excellent tensile strength, curing contraction rate, resistance to cold-heat impact and scraping resistance and is excellent in light transmission and high in stability; the preparation method is simple, convenient to operate and control, stable in quality, high in production efficiency, low in production cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of optical glue, in particular to an OCA optical glue and a preparation method thereof. Background technique [0002] OCA optical adhesives are currently mostly used for display screen protection films, bonding ITO films and bonding plastic nameplates, and most of the current OCA optical adhesives are special adhesives without substrates, which are generally prepared by light curing. However, when the thickness of the OCA adhesive layer is required to be thick, it is easy to have incomplete curing. When the curing process extends from the surface of the OCA adhesive layer to the inner layer, it is easy to appear that some monomers are not easy to discharge, especially OCA. Uneven internal curing of the adhesive layer can easily lead to excessive internal stress of the OCA adhesive layer, which in turn affects the tensile strength, shrinkage rate after curing, and thermal shock resistance of the OCA optical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/30C09J7/40C09J133/04C09J11/08C09J11/06
CPCC09J7/00C09J11/06C09J11/08C09J133/04C09J2301/208C09J2301/312C09J2433/00C09J2467/005C08L75/04C08L63/00
Inventor 朱文峰李林克
Owner NALI OPTICAL MATERIAL DONGGUAN
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