An adhesive composition, which exhibits excellent adhesion to base films made from polyimide resins and the like or copper foils, as well as superior electrical properties, and a laminate having an adhesive layer, which is low in warpage when the adhesive layer is in the B stage, and which is excellent in storage stability of the laminate, are provided. The adhesive composition includes a modified polyolefin-based resin and an epoxy resin, in which the modified polyolefin-based resin is a resin resulting from graft-modification of an unmodified olefin resin with a modifying agent containing an α,β-unsaturated carboxylic acid or derivative thereof, wherein the content of the modified polyolefin-based resin is 50 parts by mass or more relative to 100 parts by mass of the solid content of the adhesive composition; the content of the epoxy resin is from 1 to 20 parts by mass relative to 100 parts by mass of the modified polyolefin-based resin; and the dielectric constant of a cured body of the adhesive is less than 2.5 as measured at a frequency of 1 GHz.

An adhesive composition, which exhibits excellent adhesion to base films made from polyimide resins and the like or copper foils, as well as superior electrical properties, and a laminate having an adhesive layer, which is low in warpage when the adhesive layer is in the B stage, and which is excellent in storage stability of the laminate, are provided. The adhesive composition includes a modified polyolefin-based resin and an epoxy resin, in which the modified polyolefin-based resin is a resin resulting from graft-modification of an unmodified olefin resin with a modifying agent containing an α,β-unsaturated carboxylic acid or derivative thereof, wherein the content of the modified polyolefin-based resin is 50 parts by mass or more relative to 100 parts by mass of the solid content of the adhesive composition; the content of the epoxy resin is from 1 to 20 parts by mass relative to 100 parts by mass of the modified polyolefin-based resin; and the dielectric constant of a cured body of the adhesive is less than 2.5 as measured at a frequency of 1 GHz.

Presently described are optical stacks comprising a first optical film comprising a plurality of structures comprising an optically active portion designed primarily to provide optical gain and optionally an optically in-active bonding portion disposed on a first surface bonded to a second optical film with a light-transmissive adhesive layer such that a portion of the structures penetrate the adhesive layer and a separation is provided between the adhesive layer and the first surface. In one embodiment, the optical stacks exhibit a combination of high peel strength and high retained brightness, particularly after aging. The adhesive layer preferably comprises an interpenetrating network of the reaction product of a polyacrylate component and a polymerizable monomer and the adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.

Presently described are optical stacks comprising a first optical film comprising a plurality of structures comprising an optically active portion designed primarily to provide optical gain and optionally an optically in-active bonding portion disposed on a first surface bonded to a second optical film with a light-transmissive adhesive layer such that a portion of the structures penetrate the adhesive layer and a separation is provided between the adhesive layer and the first surface. In one embodiment, the optical stacks exhibit a combination of high peel strength and high retained brightness, particularly after aging. The adhesive layer preferably comprises an interpenetrating network of the reaction product of a polyacrylate component and a polymerizable monomer and the adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.

A radiation curable adhesive comprising (i) (meth)acrylic monomer(s) and/or oligomer(s), wherein said (meth)acrylic monomers or oligomers comprise 5 to 50 wt % of esters of (meth)acrylic acid with polyetherpolyols having the formula HO—((CH.sub.2).sub.m—O).sub.n—X wherein m=2, 3 or 4; n=2 to 50; X=H, linear, branched or aromatic C1 to C12-alkyl, the ester having a molecular weight from 150 to 2000 g/mol; (ii) non-reactive (co)polymer(s) based on unsaturated monomers, wherein said unsaturated monomers are selected from vinyl esters, (meth)acrylate esters and C2 to C8 unsaturated olefins, the (co)polymer having a molecular weight from 5000 g/mol to 500000 g/mol, such adhesive can form a solid adhesive layer after being cross-linked by radiation, the layer, has a non tacky surface but can be adhesively bonded under pressure to a second layer of the adhesive.

A radiation curable adhesive comprising (i) (meth)acrylic monomer(s) and/or oligomer(s), wherein said (meth)acrylic monomers or oligomers comprise 5 to 50 wt % of esters of (meth)acrylic acid with polyetherpolyols having the formula HO—((CH.sub.2).sub.m—O).sub.n—X wherein m=2, 3 or 4; n=2 to 50; X=H, linear, branched or aromatic C1 to C12-alkyl, the ester having a molecular weight from 150 to 2000 g/mol; (ii) non-reactive (co)polymer(s) based on unsaturated monomers, wherein said unsaturated monomers are selected from vinyl esters, (meth)acrylate esters and C2 to C8 unsaturated olefins, the (co)polymer having a molecular weight from 5000 g/mol to 500000 g/mol, such adhesive can form a solid adhesive layer after being cross-linked by radiation, the layer, has a non tacky surface but can be adhesively bonded under pressure to a second layer of the adhesive.

Agent for sanitary facilities that can be applied directly on the sanitary object, adheres, and is flushable only after a large number of flushes. The agent includes fillers from the group of surfactants and a bonding agent, wherein the bonding agent is selected from the group of polyalkylene derivatives, hydrogentated polystyrol derivatives, copolymers from the group of monoalkyl esters of poly(methyl vinyl ether/carbonic acid anhydrides, olefin homopolymers, and copolymers of two or more olefins, wherein the olefin homopolymers and copolymers can also be partially hydrogenated, partially oxidized, or further functionalized by graft molecules, and from the group of polyalkyleneimines, including in alkoxylized form, polyetheramines (alkoxylized amines) and polyglycerin polyether alkyl carbonic acids, polymers or derivatives including such polymer groups.

Agent for sanitary facilities that can be applied directly on the sanitary object, adheres, and is flushable only after a large number of flushes. The agent includes fillers from the group of surfactants and a bonding agent, wherein the bonding agent is selected from the group of polyalkylene derivatives, hydrogentated polystyrol derivatives, copolymers from the group of monoalkyl esters of poly(methyl vinyl ether/carbonic acid anhydrides, olefin homopolymers, and copolymers of two or more olefins, wherein the olefin homopolymers and copolymers can also be partially hydrogenated, partially oxidized, or further functionalized by graft molecules, and from the group of polyalkyleneimines, including in alkoxylized form, polyetheramines (alkoxylized amines) and polyglycerin polyether alkyl carbonic acids, polymers or derivatives including such polymer groups.

Agent for sanitary facilities that can be applied directly on the sanitary object, adheres, and is flushable only after a large number of flushes. The agent includes fillers from the group of surfactants and a bonding agent, wherein the bonding agent is selected from the group of polyalkylene derivatives, hydrogentated polystyrol derivatives, copolymers from the group of monoalkyl esters of poly(methyl vinyl ether/carbonic acid anhydrides, olefin homopolymers, and copolymers of two or more olefins, wherein the olefin homopolymers and copolymers can also be partially hydrogenated, partially oxidized, or further functionalized by graft molecules, and from the group of polyalkyleneimines, including in alkoxylized form, polyetheramines (alkoxylized amines) and polyglycerin polyether alkyl carbonic acids, polymers or derivatives including such polymer groups.

Provided are an adhesive resin laminate having an excellent adhesive force to two adherends, a laminate in which this adhesive resin laminate is laminated with two adherends, and a method of producing them. An adhesive resin laminate having at least a first adhesive layer and a second adhesive layer, in which the first adhesive layer includes a base resin and a crosslinking agent, the base resin is a modified polyolefin resin, the crosslinking agent is an epoxy-based compound, the second adhesive layer includes a polyolefin-based resin, and when an adhesion initiation temperature of the first adhesive layer is set to T1, and an adhesion initiation temperature of the second adhesive layer is set to T2, T2 is higher than T1 by 30° C. or more.