The present invention provides a dual-curable hybrid adhesive composition including a photo-initiator, a thermal initiator, and a thiol group-containing compound, and more particularly, to an adhesive composition which may be cured through a single curing by ultraviolet (UV) light or heat, and where thermal curing proceeds concurrently with UV curing by a heat generated during the UV curing such that even a light shield portion which may not transmit UV light therethrough may be sufficiently cured.

A curable perfluoropolyether adhesive composition containing: (A) 100 parts by mass of a linear perfluoropolyether compound having at least two alkenyl groups per molecule and having a perfluoropolyether structure containing a repeating unit represented by -C.sub.aF.sub.2aO- in a main chain; (B) an organosilicon compound having at least two silicon-bonded hydrogen atoms per molecule; (C) a hydrosilylation-reaction catalyst; (D) 0.05 to 5 parts by mass of an organosilicon compound, other than the component (B), having per molecule any two or more selected from a silicon-bonded hydrogen atom, an epoxy group bonded to a silicon atom via a carbon atom or via a carbon atom and an oxygen atom, and a trialkoxysilyl group bonded to a silicon atom via a carbon atom or via a carbon atom and an oxygen atom.

The present invention provides a surface protective film which includes an adhesive layer on one surface of a substrate film, wherein the adhesive layer is a cured product of a composition containing: a urethane-based resin having a photoreactive group at the end or side chain thereof; a monofunctional (meth)acrylate monomer; a crosslinking agent having two or more photoreactive groups at the end thereof; a peel strength adjusting agent; and a photoinitiator, the composition being solvent-free; and the adhesive layer has peel strength of 0.5 gf/in to 10 gf/in, as measured on glass at a peel angle of 180° and a peel rate of 1.8 m/min.

Provided is a pressure-sensitive adhesive sheet that can temporarily fix an adherend in a peelable manner, the pressure-sensitive adhesive sheet being free from requiring the application of high-output laser light at the time of the peeling of the adherend and being capable of eliminating the need for a step of washing the adherend after the peeling. The pressure-sensitive adhesive sheet of the present invention includes a pressure-sensitive adhesive layer containing a UV absorber and an active energy ray-curable pressure-sensitive adhesive, wherein the pressure-sensitive adhesive sheet has a transmittance of 50% or less for light having a wavelength of 355 nm. In one embodiment, the pressure-sensitive adhesive layer has a thickness of 20 μm or less. In one embodiment, the pressure-sensitive adhesive sheet has a visible light transmittance of 50% or more.

The present invention is concerned with the use of hydrotreated synthetic Fischer-Tropsch waxes in polyolefin-based hot melt adhesive compositions, wherein the hydrotreated synthetic Fischer-Tropsch waxes modify the color degradation in the polyolefin-based hot melt adhesive compositions and are characterized by a polydispersity between 1.02 and 1.06.

An object of the present invention is to provide a pressure-sensitive adhesive sheet enables a pressure-sensitive adhesive layer to be formed, wherein the pressure-sensitive adhesive layer has a low dielectric constant, is excellent in level difference conformability while maintaining adhesive strength and adhesion reliability at high temperatures, and suitable for laminating a metal mesh film and the like. The pressure-sensitive adhesive sheet of the present invention is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer containing an acrylic polymer (A) and a hydrogenated polyolefinic resin (B) that exhibits liquid flowability at 25° C. The pressure-sensitive adhesive layer has a dielectric constant at a frequency of 1 MHz of from 2.3 to 3.5. The pressure-sensitive adhesive sheet has a 180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 65° C. of 6 N/20 mm or more. In the pressure-sensitive adhesive sheet, the proportion of the 180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 65° C. to the 180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 25° C. (180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 65° C./180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 25° C.×100) is 30 or more.

An object of the present invention is to provide a pressure-sensitive adhesive composition that enables a pressure-sensitive adhesive layer to be formed, wherein the pressure-sensitive adhesive layer has a low dielectric constant, is excellent in level difference conformability and transparency while maintaining adhesive strength and adhesion reliability at high temperatures, and suitable for laminating a metal mesh film and the like. The pressure-sensitive adhesive composition of the present invention contains an acrylic polymer (A), a mixture of monomer components constituting the acrylic polymer (A) or a partially polymerized product of a mixture of monomer components constituting the acrylic polymer (A), and a hydrogenated polyolefinic resin (B) that exhibits liquid flowability at 25° C. The pressure-sensitive adhesive composition comprises a branched-chain alkyl group having 10 to 24 carbon atoms as a monomer component. The hydrogenated polyolefinic resin (B) has a number average molecular weight (Mn) of 1000 to 5000 and a polydispersity (Mw/Mn) of 2.0 or less. The hydrogenated polyolefinic resin (B) contains at least one selected from the group consisting of a hydrogenated polyolefin and a hydrogenated polyolefin polyol. The pressure-sensitive adhesive composition comprises 3 to 35 parts by weight of the hydrogenated polyolefinic resin (B) based on 100 parts by weight of the acrylic polymer (A).

A multilayer adhesive tape is provided, including: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer sequentially. At least one of the first outer adhesive layer and the second outer adhesive layer includes a cured product of an outer adhesive composition including a high molecular weight prepolymer having a weight average molecular weight of 100,000 g/mol or more and 1,500,000 g/mol or less and a low molecular weight prepolymer having a weight average molecular weight of 1,000 g/mol or more and 80,000 g/mol or less.

An adhesive sheet including a first release film, a second release film disposed on the first release film, and an adhesive layer disposed between the first release film and the second release film, the adhesive layer including an upper surface facing the second release film, a lower surface facing the first release film, and a side surface extending from an edge of the lower surface to an edge of the upper surface. The side surface of the adhesive layer may be inclined with respect to a direction perpendicular to the upper surface and the lower surface.

The present disclosure provides a dust-purifying adhesive layer, a dust-purifying film, and a dust-purifying film sleeve. The dust-purifying adhesive layer comprises a substrate layer, an optically clear adhesive (OCA) layer, and a dust-purifying layer, the dust-purifying layer and the OCA layer respectively disposed on two sides of the substrate layer, wherein the dust-purifying layer is adapted for dust-purifying and air bubbles elimination. Compared with the prior art, the dust-purifying adhesive layer comprises a dust-purifying layer having functions of dust-purifying function and anti-foaming and when the dust-purifying film is arranged on the screen of the electronic device, the dust-purifying layer is in direct contact with the screen, and during the film-pasting process, air bubbles can be quickly eliminated, so that no air bubbles are generated during the film-pasting process.