Abstract: The present invention relates to an acrylic pressure-sensitive adhesive sheet including: a viscoelastic material layer (X) containing hollow microspheres; and a pressure-sensitive adhesive layer (Y) provided on at least one face of the viscoelastic material layer (X) and formed from a monomer composition, in which the monomer composition includes the following monomers (m1), (m2) and (m3) as essential monomer components, in which a content of the monomer (m1) is 50 to 85% by weight, a content of the monomer (m2) is 0.1 to 20% by weight, and a content of the monomer (m3) is 2 to 40% by weight, based on a total amount of monomer components constituting the monomer composition, (m1) an alkyl(meth)acrylate monomer including an alkyl group having 1 to 20 carbon atoms, which is represented by the following formula (1), [Chem.

Abstract: The present invention relates to an acrylic pressure-sensitive adhesive sheet including: a viscoelastic material layer (X) containing hollow microspheres; and a pressure-sensitive adhesive layer (Y) provided on at least one face of the viscoelastic material layer (X) and formed from a pressure-sensitive adhesive composition including, as a main component, an acrylic copolymer which is constructed from the following monomers (m1) and (m2) as an essential monomer component, in which a content of the monomer (m1) is 50 to 99.9% by weight and a content of the monomer (m2) is 0.1 to 25% by weight based on a total amount of monomer components constituting the acrylic copolymer, (m1) an alkyl(meth)acrylate monomer including an alkyl group having 1 to 20 carbon atoms, which is represented by the following formula (1), [Chem.

Abstract: The present invention relates to a pressure-sensitive adhesive composition used for a pressure-sensitive adhesive sheet to be directly attached to a metal surface, the composition including, a monomer mixture or an acrylic copolymer material obtained by at least partially polymerizing the monomer mixture, the monomer mixture including: at least one monomer (monomer m1) selected from alkyl(meth)acrylates represented by the following formula (I): CH2?C(R1)COOR2 in which R1 is a hydrogen atom or a methyl group, and R2 is an alkyl group having 1 to 20 carbon atoms, and N-methylol (meth)acrylamide (monomer m2); in which the monomer m1 and the monomer m2 are contained in a total amount of 60% by weight or more based on the total amount of the monomer mixture, and the monomer mixture includes substantially no carboxyl group-containing monomer.

Abstract: The present invention relates to a pressure-sensitive adhesive composition including, as a main ingredient, a monomer mixture or an acrylic copolymer material obtained by at least partially polymerizing the monomer mixture, the monomer mixture including: at least one monomer (monomer ml) selected from alkyl (meth)acrylates represented by the following formula (I) CH2?C(R1)COOR2 in which R1 is a hydrogen atom or a methyl group, and R2 is an alkyl group having 1 to 20 carbon atoms: at least one monomer (monomer m2) selected from N-hydroxyalkyl (meth)acrylamides represented by the following formula (II) CH2?C(R1)CONHR4 in which R3 is a hydrogen atom or a methyl group, and R4 is a hydroxyalkyl group having 2 to 4 carbon atoms: and at least one monomer (monomer m3) selected from N-vinyl cyclic amides and (meth)acrylamides that may have an N-alkyl group; and the monomer mixture including substantially no carboxyl group-containing monomer.

Abstract: The present invention relates to a pressure-sensitive adhesive composition used for a pressure-sensitive adhesive sheet to be directly attached to a metal surface, the composition including, as a base polymer, an acrylic copolymer obtained by polymerizing a monomer mixture, the monomer mixture including: at least one monomer (monomer m1) selected from alkyl(meth)acrylates represented by the formula (I): CH2?C(R1)COOR2 in which R1 is a hydrogen atom or a methyl group, and R2 is an alkyl group having 1 to 20 carbon atoms, in an amount of 50 to 99.9% by weight based on a total amount of the monomer mixture, and at least one monomer (monomer m2) selected from N-hydroxyalkyl(meth)acrylamides represented by the formula (II): CH2?C(R3)CONHR4 in which R3 is a hydrogen atom or a methyl group, and R4 is a hydroxyalkyl group having 2 to 4 carbon atoms, in an amount of 0.

Abstract: The present invention provides an impact absorption sheet for flat panel display with a polyoxyalkylene-series polymer as the main component, preferably, an impact absorption sheet for flat panel display made of a cured product obtained by curing a composition containing (A) polyoxyalkylene-series polymer having at least one alkenyl group in each molecule, (B) compound having an average of 2 or more hydrosilyl groups in each molecule, and (C) hydrosilylation catalyst. According to the present invention, an impact absorption sheet for flat panel display can be obtained, which can meet the size reduction and weight reduction of flat panel display, and which affords practically sufficient impact absorbability even in an area of thin film where practically sufficient impact absorbability has not been conventionally achieved.