Abstract: The present invention relates to a photo-curable liquid optically clear adhesive composition, to a cured adhesive and an article produced therefrom, and to the use thereof.

Abstract: An object of the present invention is to provide a liquid adhesive composition that, when cured, has a high degree of bond strength and exhibits a relatively constant storage modulus in a wide range of temperatures. A liquid adhesive composition containing (A) an acrylate-functional resin, (B) a hydroxyl-containing (meth)acrylate, and (C) a silicone resin, the acrylate-functional resin (A) having a weight average molecular weight (Mw) of 25,000 to 100,000 and a Mw/Mn ratio of 2 or less, and the silicone resin (C) having a weight average molecular weight (Mw) of 450 to 2,000 and a silanol content of 0.1 to 5 wt. %, based on the silicone resin (C).

Abstract: An object of the present invention is to provide a liquid adhesive composition that, when cured, has a high degree of bond strength and exhibits a relatively constant storage modulus in a wide range of temperatures. A liquid adhesive composition containing (A) an acrylate-functional resin, (B) a hydroxyl-containing (meth)acrylate, and (C) a silicone resin, the acrylate-functional resin (A) having a weight average molecular weight (Mw) of 25,000 to 100,000 and a Mw/Mn ratio of 2 or less, and the silicone resin (C) having a weight average molecular weight (Mw) of 450 to 2,000 and a silanol content of 0.1 to 5 wt. %, based on the silicone resin (C).

Abstract: The present application relates to a resin composition and in particular to a light-curable resin composition. It is known to achieve a thixotropic behavior of an adhesive composition by adding an inorganic additive like fumed silica. Adding inorganic additives results in significant particle problems as fumed silica is a solid particle and affects the optical performance of the adhesive composition. In accordance with the invention a particle free resin composition with a thixotropic behavior is provided. The inventive composition comprises a) 30 to 90 wt % of a urethane acrylate oligomer with a molecular weight greater than 15000, b) 2 to 40 wt % of a (meth)acrylate monomer having a benzene ring, and c) 0.2 to 10 wt % of a photo initiator.

Abstract: A liquid photo-curable adhesive composition comprising: (a) 5 to 30 wt % of urethane acrylate, (b) 30 to 80 wt % of plasticizer, (c) 0.02 to 5 wt % of photo initiator, (d) 0 to 30 wt % of acrylate monomers and/or oligomer, is described.

Abstract: A process for binding a top substrate to a base substrate is disclosed, in which (a) a liquid optically clear photo-curable adhesive is applied onto the top side of the base substrate, (b) the liquid optically clear photo-curable adhesive is partially cured by exposure to electromagnetic radiation comprising a wavelength ranging from 200 nm to 700 nm, (c) the top substrate is attached on the partially cured adhesive layer of step (b), (d) the adhesive is fully cured by exposure to electromagnetic radiation comprising a wavelength ranging from 200 nm to 700 nm.

Abstract: The present invention relates to a photo-curable liquid optically clear adhesive composition, to a cured adhesive and an article produced therefrom, and to the use thereof.

Abstract: The present application relates to a resin composition and in particular to a light-curable resin composition. It is known to achieve a thixotropic behavior of an adhesive composition by adding an inorganic additive like fumed silica. Adding inorganic additives results in significant particle problems as fumed silica is a solid particle and affects the optical performance of the adhesive composition. In accordance with the invention a particle free resin composition with a thixotropic behavior is provided. The inventive composition comprises a) 30 to 90 wt % of a urethane acrylate oligomer with a molecular weight greater than 15000, b) 2 to 40 wt % of a (meth)acrylate monomer having a benzene ring, and c) 0.2 to 10 wt % of a photo initiator.

Abstract: An optical sheet is incorporated in a direct type surface light source device including a light source and is configured to allow light emitted from the light source to exit after changing a travel direction of the light. The optical sheet has a light exiting side lens part including unit lenses juxtaposed to one another and each unit lens is convex toward a light exiting side. A light scattering layer, configured to scatter the light, is provided to each unit lens. The light scattering layer extends along a light exiting side surface of each convex unit lens and constitutes the light exiting side surface of the unit lens. A thickness of the light scattering layer around an apex portion of each unit lens is greater than the thickness of the light scattering layer around each end portion of the unit lens.

Abstract: A process for binding a top substrate to a base substrate is disclosed, in which (a) a liquid optically clear photo-curable adhesive is applied onto the top side of the base substrate, (b) the liquid optically clear photo-curable adhesive is partially cured by exposure to electromagnetic radiation comprising a wavelength ranging from 200 nm to 700 nm, (c) the top substrate is attached on the partially cured adhesive layer of step (b), (d) the adhesive is fully cured by exposure to electromagnetic radiation comprising a wavelength ranging from 200 nm to 700 nm.

Abstract: A liquid photo-curable adhesive composition comprising: (a) 5 to 30 wt % of urethane acrylate, (b) 30 to 80 wt % of plasticizer, (c) 0.02 to 5 wt % of photo initiator, (d) 0 to 30 wt % of acrylate monomers and/or oligomer, is described.

Abstract: An optical sheet is structured to have a translucent substrate 12, an optical element 16 provided on one surface S1 of the translucent substrate 12, on which a plurality of unit prisms 14 or unit lenses are arranged, and a light diffusion layer provided between the one surface S1 and the optical element 16 and/or on another surface S2 of the translucent substrate 12, and at least one of the light diffusion layer 18 includes gap parts 22 as a light diffusion element. At this time, the gap parts 22 is preferably in an approximately oval shape oriented in a uniaxial direction in plan view.

Abstract: An optical sheet is structured to have a translucent substrate 12, an optical element 16 provided on one surface S1 of the translucent substrate 12, on which a plurality of unit prisms 14 or unit lenses are arranged, and a light diffusion layer provided between the one surface S1 and the optical element 16 and/or on another surface S2 of the translucent substrate 12, and at least one of the light diffusion layer 18 includes gap parts 22 as a light diffusion element. At this time, the gap parts 22 is preferably in an approximately oval shape oriented in a uniaxial direction in plan view.

Abstract: An optical sheet is incorporated in a direct type surface light source device including a light source and is configured to allow light emitted from the light source to exit after changing a travel direction of the light. The optical sheet has a light exiting side lens part including unit lenses juxtaposed to one another and each unit lens is convex toward a light exiting side. A light scattering layer, configured to scatter the light, is provided to each unit lens. The light scattering layer extends along a light exiting side surface of each convex unit lens and constitutes the light exiting side surface of the unit lens. A thickness of the light scattering layer around an apex portion of each unit lens is greater than the thickness of the light scattering layer around each end portion of the unit lens.