A display device of an embodiment includes a display module, a window disposed on the upper side of the display module, a protective layer disposed on the upper side of the window, a housing disposed on the lower side of the display module, and a protective layer adhesive layer disposed between the window and the protective layer, wherein the protective layer adhesive layer includes a polymer compound including multiple polymer main chains and multiple crosslinking parts, the crosslinking parts form multiple crosslinking bonds between the polymer main chains through Diels-Alder reaction, and the crosslinking bonds are separated through Retro-Diels-Alder reaction, thereby showing easy reworkability and excellent or suitable mechanical properties.

Provided is a flexible image display device member having a configuration in which two flexible members are adhered together via a novel adhesive layer that can firmly adhere to highly polar member sheets, and has excellent bendability, wherein the adhesive layer has a maximum value of a loss tangent (tan δ) obtained by dynamic viscoelasticity measurement in a shear mode at a frequency of 1 Hz being at −20° C. or lower, and in the Hansen solubility parameters (δd, δp, and δh) on the adhesive layer surface as measured by a contact angle method, the polar term δp is 2.0 MPa.sup.0.5 or more and the hydrogen bond term δh is 5.0 MPa.sup.0.5 or more.

A composition that cures when exposed to actinic radiation. In some embodiments the curable adhesive composition comprises: a) one or more radiation curable oligomers or prepolymers terminally having at least one carbon-carbon double bond-containing group; b) one or more diluent monomer components containing at least one polymerizable group; c) optionally one or more adhesion promoting additives of an organic or inorganic acid acrylic monomer; and optionally one or more rheological modifiers; one or more plasticizers and; one or more additives. The curable composition can be used in an adhesive that structurally bonds many substrates including dissimilar substrates. In some embodiments cured reaction products of the composition have a broad service temperature range from 20 to 120 C. Cured reaction products of this embodiment will exhibit greater than 50% cohesive failure in this temperature range. The cured composition will retain adhesive strength at temperatures above its Tg.

Curable cyanoacrylate compositions are reported that comprise cyanoacrylate and a thermoplastic polyurethane (TPU) components. Such compositions are toughened cyanoacrylate compositions exhibiting long term viscosity stability when stored for prolonged periods at room temperature (25° C.). TPU components are reported having structural units in which at least one of the structural units has the formula —O—R.sup.1—O—Ar—O—R.sup.2—O—, wherein Ar is a C.sub.6-C.sub.20 aromatic group with at least one aromatic ring; R.sup.1 is a C.sub.2-C.sub.10 alkyl group; and R.sup.2 is a C.sub.2-C.sub.10 alkyl group. The thermoplastic polyurethane (TPU) component may be present in the curable cyanoacrylate composition from about 1 wt % to about 40 wt %, for example from about 2 wt % to about 30 wt %, such from about 3 wt % to about 20 wt %, suitably from about 5 wt % to about 10 wt %, based on the total weight of the composition.

Provided are curable adhesives, along with adhesive tapes, laminates, and laminated mirror buttons that include the curable adhesive. The curable adhesive includes a (meth)acrylate polymer, a curable oxetane compound, a polymer filler, and a photoinitiator for curable oxetane compounds. The curable adhesive, when cured, can provide excellent interfacial failure resistance.

An adhesive resin composition of the invention includes an ethylene polymer (A) including an ethylene polymer graft-modified with an unsaturated carboxylic acid or a derivative thereof, and satisfies the following requirements (1) to (4). (1) The melt flow rate (MFR) measured at a temperature of 190° C. and a load of 2160 g in accordance with ASTM D 1238 is 0.1 to 3 g/10 min. (2) The density is 910 to 930 kg/m.sup.3. (3) The proportion of fractions that elute at 50° C. and below in crystallization elution fractionation chromatography measurement is not less than 20 mass %. (4) The proportion of fractions that elute at 90° C. and above in crystallization elution fractionation chromatography measurement is not less than 25 mass %.

An adhesive resin composition of the invention includes an ethylene polymer (A) including an ethylene polymer graft-modified with an unsaturated carboxylic acid or a derivative thereof, and satisfies the following requirements (1) to (4). (1) The melt flow rate (MFR) measured at a temperature of 190° C. and a load of 2160 g in accordance with ASTM D 1238 is 0.1 to 3 g/10 min. (2) The density is 910 to 930 kg/m.sup.3. (3) The proportion of fractions that elute at 50° C. and below in crystallization elution fractionation chromatography measurement is not less than 20 mass %. (4) The proportion of fractions that elute at 90° C. and above in crystallization elution fractionation chromatography measurement is not less than 25 mass %.

An anaerobically curable composition comprising: (a) a non-encapsulated liquid anaerobically curable monomer forming a liquid phase; (b) a solid component dispersed as a solid phase within the liquid phase formed by the non-encapsulated liquid anaerobically curable monomer; wherein the solid component has (meth)acrylate functionality and: (i) is in particulate form with the particles having a particle size in the range from about 80 μm to about 300 μm; and (ii) has a melting temperature of from about 50° C. to about 90° C.; and (c) a curing component for curing the anaerobically curable composition within the liquid phase.

The anaerobically curable composition can easily be coated onto substrates such as threaded fasteners or other parts in its flowable form and then converted to anaerobically curable composition in solid form.

A cyanoacrylate composition with thermoplastic polyurethane, formulated as a non-flowable soft solid or semi solid mass, for example in stick form, is reported.

A cyanoacrylate composition with thermoplastic polyurethane, formulated as a non-flowable soft solid or semi solid mass, for example in stick form, is reported.