Transparent gel self-adhesive agent, transparent gel self-adhesive sheet, optical filter for display

Abstract

A novel transparent adhesive agent is provided which allows a substrate and a surface material to be pasted together at room temperature, without requiring high temperature/high pressure treatment, and, furthermore, may confer an excellent damping property. A transparent gel adhesive is provided, wherein the transparent gel consists of a three-dimensionally cross-linked polymer swollen by a liquid containing a plasticizer and an inorganic fine particle, whose plasticizer is a fluid body with a solidifying point of -20 DEG C or below and a content of 20 to 70 weight percent, whose inorganic fine particles have a primary average particle diameter of 200 nm or less and contained in an amount of 1 to 15 weight percent, whose resin that constitutes the three-dimensionally cross-linked polymer has a glass transition temperature (Tg) of -20 DEG C or below, melt viscosity at 130 DEG C of 50,000 mPa.s or above, whose transparent gel has a holding strength of 5 mm or less at a load of 490 mN (50 gf)x2 hours and 40 DEG C, in a test conforming to JIS Z0237.

Description

technical field [0001] The present invention relates to a transparent gel adhesive and a transparent gel adhesive sheet, which are used for gluing transparent materials such as glass, transparent plastic materials, etc. constituting various window materials, various display panels, etc., and light filters for displays using the above materials piece. Background technique [0002] Glass materials are widely used in various window materials, various display panels, etc., and have advantages such as wear resistance, weather resistance, and transparency. However, since glass materials have problems of being weak against shock and vibration, they are reinforced by various methods, such as a method of thermally or chemically strengthening glass, a method of laminating glass, and a method of lining a protective sheet, depending on the application. [0003] In recent years, as the requirements for window materials and various panels have increased in terms of crime prevention, safe...

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Problems solved by technology

[0005] However, in both cases of the former composite material glass and the latter laminated display panel and protective plate, it is mostly necessary to bond while applying heat or pressure or both by the autoclave method, and in this case In this case, bending and peeling, cracks and other phenomena will appear after bonding, which is due to the different linear expansion coefficients of various materials

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