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 high-output laser light irradiation at the time of the peeling of the adherend. The pressure-sensitive adhesive sheet of the present invention includes a pressure-sensitive adhesive layer containing a UV absorber, wherein the pressure-sensitive adhesive layer has a first surface and a second surface opposed to the first surface, and wherein a maximum value S1 of a detection intensity of the UV absorber by time-of-flight secondary ion mass spectrometry (TOF-SIMS) in a range of from the first surface to a depth of 1 μm in a thickness direction and a detection intensity C of the UV absorber by the TOF-SIMS at a center point in the thickness direction of the pressure-sensitive adhesive layer satisfy a relationship: S1/C≥1.1.

Methods of making crosslinked polymeric materials and crosslinked interlocked hybrid polymeric materials using photoinitiator, antioxidant, additive, and photoirradiation of polymeric blend and/or interlocked hybrid materials are provided. Methods of spatially controlling macroscopic properties and morphology of polymeric materials, and products made by the methods also are provided.

Methods of making crosslinked polymeric materials and crosslinked interlocked hybrid polymeric materials using photoinitiator, antioxidant, additive, and photoirradiation of polymeric blend and/or interlocked hybrid materials are provided. Methods of spatially controlling macroscopic properties and morphology of polymeric materials, and products made by the methods also are provided.

Display modules typically incorporate a transparent hard material such as glass on the outside of the module in order to better protect the display stack from scratches, dents, and other mechanical deformations. However, as displays move to novel form factors such as bendable, foldable, and reliable display modules, these transparent hard materials (e.g., glass) may not be used due to their limited flexibility. Therefore, it is desirable that replacement materials be sufficiently flexible while maintaining the desirable optical (e.g., >90% transmission and low yellow index) and mechanical properties (e.g., pencil hardness>H) that comparable glass hard materials offer.

Provided is an ultraviolet absorbing agent that efficiently absorbs ultraviolet rays in a wide wavelength region, and in particular, has a strong absorbability in the UV-A region. Also, a synthetic resin composition having excellent weatherability is provided. Provided is an ultraviolet absorbing agent including a triazine-based compound represented by Formula (1) below. Also, a synthetic resin composition containing the ultraviolet absorbing agent is provided. R.sup.2, R.sup.3, and R.sup.4 in the triazine-based compound represented by Formula (1) below are each preferably a hydrogen atom or a methyl group, and particularly preferably a hydrogen atom.

Optically clear adhesives (OCA) with UV blocking below 380 nm are described. The OCA comprise a UV blocking package of UV absorbers and hindered amine light stabilizers. The UV blocking package is suitable for a variety of OCA, including PIB-based OCA, styrenic block copolymer-based OCA, silicone-based OCA, or acrylic-based OCA. The OCA with UV blocking in the invention are particularly suitable as laminating films, tapes or encapsulants for adhering display electronic devices, e.g., LCD displays, LED displays, flexible and foldable displays, and touch screens.

Optically clear adhesives (OCA) with UV blocking below 380 nm are described. The OCA comprise a UV blocking package of UV absorbers and hindered amine light stabilizers. The UV blocking package is suitable for a variety of OCA, including PIB-based OCA, styrenic block copolymer-based OCA, silicone-based OCA, or acrylic-based OCA. The OCA with UV blocking in the invention are particularly suitable as laminating films, tapes or encapsulants for adhering display electronic devices, e.g., LCD displays, LED displays, flexible and foldable displays, and touch screens.

Stabilizer compositions for stabilizing materials against degradation due to thermal and ultraviolet light exposure are disclosed herein. In some instances, the stabilizer compositions include an ortho-hydroxyl tris-aryl-s-triazine compound; a hindered amine light stabilizer compound; a hindered hydroxybenzoate compound; a phosphite compound, an acid scavenger and/or thioester; and a hindered phenol antioxidant compound.

Stabilizer compositions for stabilizing materials against degradation due to thermal and ultraviolet light exposure are disclosed herein. In some instances, the stabilizer compositions include an ortho-hydroxyl tris-aryl-s-triazine compound; a hindered amine light stabilizer compound; a hindered hydroxybenzoate compound; a phosphite compound, an acid scavenger and/or thioester; and a hindered phenol antioxidant compound.

Provided are a encapsulant composition that is for solar cells and can reduce the time required for a lamination process and improve light stability and resistance to moisture and heat, and a solar cell encapsulant layer and a solar cell module, each produced with the composition, wherein the composition includes an ethylenic copolymer and an organic peroxide having a peroxyester structure represented by formula (1) or (2)

##STR00001##

wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently represent an optionally substituted alkyl group of 1 to 18 carbon atoms or an optionally substituted aryl group of 5 to 18 carbon atoms.