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Transparent adhesive sheet for flat panel display

A flat panel display and adhesive sheet technology, applied in the direction of polyether adhesive, adhesive type, film/sheet adhesive, etc., can solve the problems of high light reflection loss and inability to provide visibility, etc. Achieve impact resistance and excellent visibility

Inactive Publication Date: 2011-06-01
NITTO DENKO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the gap is usually an air layer, it problematically fails to provide good visibility due to a high light reflection loss due to the difference in refractive index between the air layer and the materials constituting the above-mentioned display panel and transparent protective plate.

Method used

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  • Transparent adhesive sheet for flat panel display
  • Transparent adhesive sheet for flat panel display
  • Transparent adhesive sheet for flat panel display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] The composition was placed in a stirrer with a vacuum device (Mini Dappo manufactured by SEATEC CORPORATION), and the mixture was stirred in a vacuum (100 Pa) for 1 hour to defoam, said composition comprising the following components: Component A in the specification is a polyoxyalkylene-based polymer (number-average molecular weight: about 20,000), and component B is a hydrosilyl compound (in an amount to provide a functional group ratio (molar ratio) of 0.75) (which is relative to the component The amount of the hydrosilyl group of the polyoxyalkylene polymer of the component A)), and the component C is the hydrosilylation catalyst (0.9×10 -3 mol, per 1 mol of the alkenyl group in component A) (manufactured by KANEKA Corporation), and 0.1 wt% of bis(1,2,2,6,6- Pentamethyl-4-piperidinyl) sebacate (Tinuvin 765 (trade name) manufactured by Ciba Specialty Chemicals). Then, the vacuum defoaming composition was applied (cast) at room temperature on a base separator (suppor...

Embodiment 2、3

[0130] A transparent adhesive sheet was prepared in the same manner as in Example 1 except that the thickness of the applied composition was changed to 150 μm and 250 μm.

Embodiment 4-6

[0132] A transparent adhesive sheet (Example 4) was prepared in the same manner as in Example 1 except that the amount of the added light stabilizer (Tinuvin 765) was changed to 0.6% by weight relative to Component A, and further, the applied The thickness of the coated composition was changed to 150 μm and 250 μm to prepare transparent adhesive sheets (Examples 5 and 6, respectively).

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Abstract

Disclosed is a transparent adhesive sheet for flat panel displays, which has excellent light resistance. The transparent adhesive sheet for flat panel displays is mainly composed of a polyoxyalkylene polymer, and contains a hindered amine light stabilizer represented by general formula (I). (In the formula, R represents an alkyl group or an alkylcarbonyl group; and R' represents an organic group bonded to the 4-position of a piperidyl group through an oxygen or nitrogen or a hydrogen atom.) Preferably, the transparent adhesive sheet for flat panel displays is composed of a cured product obtained by curing a composition containing the following components A-D. A: a polyoxyalkylene polymer having at least one alkenyl group in a molecule B: a compound having an average of two or more hydrosilyl groups in a molecule C: a hydrosilylation catalyst D: a hindered amine light stabilizer represented by the general formula (I).

Description

technical field [0001] The present invention relates to a transparent adhesive sheet for flat panel displays, and in particular, to a transparent adhesive sheet for flat panel displays having excellent light resistance. Background technique [0002] Generally, in a flat panel display such as a liquid crystal display, etc., a display panel and a transparent protective plate such as an acrylic board, a glass plate, etc. protecting the display panel are arranged with a given gap so that when some kind of impact is applied to the flat panel display, This shock will not be transmitted to the display panel. However, since the gap is generally an air layer, light reflection loss is high due to a difference in refractive index between the air layer and materials constituting the above-mentioned display panel and transparent protective plate, thereby problematically failing to provide good visibility. Therefore, in recent years, techniques for eliminating the gap (air layer) between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J11/06C09J171/02C09J183/05G09F9/00
CPCC08G65/336C09J171/02G02F2202/28C09K2323/05C09J7/22C09J7/38C09J11/06G09F9/00C09J2203/318C09J2301/302C09J2301/41
Inventor 武藏岛康铃木秀典铃木立也马场纪秀久米克也上田和彦
Owner NITTO DENKO CORP
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