Abstract: An adhesive composition which is the crosslinked product of components which comprise (C) a copolymer of a (meth)acrylic ester having a weight-average molecular weight of 1,000,000 or greater, (D) 5 to 100 parts by weight per 100 parts by weight of component (C) of an oligomer of (meth)acrylic esters having a weight-average molecular weight of 1,000 to 10,000 and (E) 0.001 to 50 parts by weight per 100 parts by weight of component (C) of a crosslinking component comprising a difunctional crosslinking agent. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.

Abstract: A substrate 2 having provided in a pressure-sensitive adhesive layer 3 side thereof recesses 21 that continue as far as side edges of the substrate 2, and a pressure-sensitive adhesive layer 3 in which are formed a plurality of penetrating passages 31 that penetrate through the pressure-sensitive adhesive layer 3 in a thickness direction are laminated together such that the recesses 21 in the substrate 2 and the penetrating passages 31 in the pressure-sensitive adhesive layer 3 communicate with one another, thus obtaining a pressure-sensitive adhesive sheet 1. According to this pressure-sensitive adhesive sheet 1, air entrapment and blistering can be prevented or eliminated while securing adequate adhesive strength and with no marring of the appearance of the pressure-sensitive adhesive sheet.

Abstract: An optical component in combination with an adhesive composition, wherein the adhesive composition comprises (A) a copolymer of a (meth)acrylic ester having a molecular weight of 500,000 to 200,000 and (E) a crosslinking agent comprising an adduct of a polyisocyanate comprising (a) isocyanate difunctional adducts of a diisocyanate with a diol and (b) adducts of a diisocyanate with a polyhydric alcohol, having an isocyanate functionality of three or greater, in a weight ratio of the amounts of (a) to (b) of 95:5 to 10:90. An adhesive sheet and an adhesive optical component comprising a layer of the adhesive composition. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.

Abstract: An adhesive composition which is the crosslinked product of components which comprise (C) a copolymer of a (meth)acrylic ester having a weight-average molecular weight of 1,000,000 or greater, (D) 5 to 100 parts by weight per 100 parts by weight of component (C) of an oligomer of (meth)acrylic esters having a weight-average molecular weight of 1,000 to 10,000 and (E) 0.001 to 50 parts by weight per 100 parts by weight of component (C) of a crosslinking component comprising a difunctional crosslinking agent. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.

Abstract: A pressure sensitive adhesive sheet is described. In addition, a pressure sensitive adhesive sheet that includes a pressure sensitive adhesive sheet and a release sheet that is removably attached to the pressure sensitive adhesive sheet is described. The release sheet comprises a release sheet base and a releasing agent layer provided on the release sheet base. The releasing agent layer is substantially free of silicone compound. The base of the pressure sensitive adhesive sheet and the release sheet base are formed from a plastic film or a lint-free paper, and the count of generated particles having a diameter of 0.1 &mgr;m or more generated from the pressure sensitive adhesive sheet with the release sheet is equal to or less than 100 particles/liter when measured according to Test Method for the Measurement of Particle Generation from Sheet Materials determined by SEMI G67-0996.

Abstract: Provided is a hard coat film which has an inorganic hard coat layer having excellent scratch resistance and weatherability and inhibited from generation of curling and which is particularly suited for sticking on outside faces of window glasses in lofty buildings. The hard coat film is prepared by laminating in order a primer layer and a hard coat layer comprising metal oxide particles and a cured matter of a silane compound on one face of a base material and further providing, if necessary, a coating layer having various functions on the above hard coat layer.

Abstract: An optical component in combination with an adhesive composition, wherein the adhesive composition comprises (A) a copolymer of a (meth)acrylic ester having a molecular weight of 500,000 to 200,000 and (E) a crosslinking agent comprising an adduct of a polyisocyanate comprising (a) isocyanate difunctional adducts of a diisocyanate with a diol and (b) adducts of a diisocyanate with a polyhydric alcohol, having an isocyanate functionality of three or greater, in a weight ratio of the amounts of (a) to (b) of 95:5 to 10:90. An adhesive sheet and an adhesive optical component comprising a layer of the adhesive composition. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.

Abstract: An adhesive composition comprising (A) a copolymer of a (meth)acrylic ester having a Mw of 500,000 to 200,000 and (B) a crosslinking agent comprising an adduct of a polyisocyante comprising (a) isocyanate difunctional adducts of a diisocyanate with a diol (b) adducts of a diisocyanate with a polyhydric alcohol, having an isocyanate functionality of three or greater, in a weight ratio of the amounts of (a) to (b) of 95:5 to 10:90. An adhesive sheet and an adhesive optical component comprising a layer of the adhesive composition. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.

Abstract: Provided is a hard coat film which has an inorganic hard coat layer having excellent scratch resistance and weatherability and inhibited from generation of curling and which is particularly suited for sticking on outside faces of window glasses in lofty buildings. The hard coat film is prepared by laminating in order a primer layer and a hard coat layer comprising metal oxide particles and a cured matter of a silane compound on one face of a base material and further providing, if necessary, a coating layer having various functions on the above hard coat layer.

Abstract: There is disclosed an antistatic adhesive sheet comprising a plastic substrate film (e.g. PET film), an antistatic layer which is formed on either side thereof and which comprises a quaternary ammonium salt, preferably a high molecular type quaternary ammonium salt, and an adhesive agent layer (e.g. acrylic-based adhesive layer) formed on the antistatic layer, and further at need, a coat layer which is an easy-to-print layer or a scratch resistance coat layer and which is formed on the opposite side of the adhesive agent layer for the plastic substrate film. The antistatic adhesive sheet suppresses the bleed out of an antistatic agent, preserves favorable transparency hardly causing a decrease in light transmissivity, and can suppress the adhesion of dirt, etc. and electrostatic troubles. Accordingly, it is well suited for antistatic purpose of use in the articles required for transparency for a cover sheet.

Abstract: Disclosed herein is a pressure sensitive adhesive sheet and a pressure sensitive adhesive sheet with a release sheet which hardly give adverse effects to hard disc drives or the like. The pressure sensitive adhesive sheet with the release sheet is constructed from a pressure sensitive adhesive sheet having a pressure sensitive adhesive base and a pressure sensitive adhesive layer, and a release sheet having a release sheet base and a releasing agent layer, and the release sheet is adhered onto the pressure sensitive adhesive sheet so that the releasing agent layer contacts with the pressure sensitive adhesive layer. In this pressure sensitive adhesive sheet with the release sheet, the content of silicone compound in the pressure sensitive adhesive sheet is preferably equal to or less than 500 &mgr;g/m2. Further, it is preferable that the amount of gas generated from the pressure sensitive adhesive sheet at a temperature of 85° C. for 30 minutes is equal to or less than 20 mg/m2.

Abstract: An adhesive composition which comprises (A) a copolymer of (meth)acrylic esters and (B) a crosslinking agent comprising an adduct of a polyisocyanate compound which comprises difunctional adducts and adducts having a functionality of three or greater in a ratio of the amounts by weight of 100:0 to 10:90; an adhesive composition which comprises (C) a copolymer of (meth)acrylic esters having a weight-average molecular weight (Mw) of 1,000,000 or greater and, per 100 parts by weight of component (C), (D) 5 to 100 parts by weight of an oligomer of (meth)acrylic esters having Mw of 1,000 to 10,000 and (E) 0.001 to 50 parts by weight of a crosslinking component comprising a difunctional crosslinking agent; and an adhesive sheet and an adhesive optical component comprising a layer of the adhesive composition.