Abstract: The invention relates to a functionalized laminated optical element comprising: —An optical base element; —A functional film structure consisting of a single layer or a multilayer structure; —A layer of a pressure-sensitive adhesive of optical quality, placed between one surface of the optical base element and the functional film structure so as to permanently retain said functional film structure on the surface of the optical base element. Said functionalized laminated optical element maintains its integrity after typical processing of an optical article which includes wheel edging. More particularly the invention relates to the use of a specific adhesive system for improving the wheel edging resistance of functionalized laminated optical element. The functional laminated optical may be an ophthalmic lens.

Abstract: Provided is a pressure-sensitive adhesive composition including: an acrylic polymer (A) having a glass transition temperature lower than 0 C.°; and a polymer (B) containing, as monomer units, both a monomer (B1) having a polyorganosiloxane skeleton and a monomer (B2) whose homopolymer has a glass transition temperature of 40 C.° or higher. The acrylic polymer (A) contains, as a monomer unit, at least one monomer selected from the group consisting of N-vinyl cyclic amides represented by the following general formula (M1): wherein R1 is a divalent organic group.

Abstract: Provided is a PSA sheet having a PSA layer. The PSA sheet has a first face and a second face. The first face is a first adhesive face formed of one surface of the PSA layer. The first adhesive face has a 10-point mean roughness of 1000 nm or less. The PSA layer has a storage modulus of 0.08 MPa or greater at 100° C.

Abstract: Provided is a PSA composition for forming a PSA comprising a (meth)acrylic polymer, comprising, as monomeric components constituting the (meth)acrylic polymer: (A) a C2-18 alkyl (meth)acrylate, (B) an alicyclic monomer, and (C) a monomer having at least either a hydroxyl group or a carboxyl group. The average number of carbons of alkyl group in the (A) is 8 or less. The monomeric components comprise the (C) at 3% by weight or greater while the weights Wb and Wc of the (B) and (C) satisfy a relationship 0.8?Wb/Wc.

Abstract: A pressure-sensitive adhesive sheet has a substrate and a pressure-sensitive adhesive layer laminated on at least one side of the substrate. The sheet is configured such that: pressure-sensitive adhesive force N1, occurring after the pressure-sensitive adhesive layer is attached to a stainless steel plate (430 BA plate) and is left at 23° C. for 10 seconds, is 1.0 [N/20 mm] or less; pressure-sensitive adhesive force N2, occurring after the pressure-sensitive adhesive layer is attached and is aged at 80° C. for 5 minutes, is 3.0 [N/20 mm] or more; and N2/N1 is 5.0 or more.

Abstract: A pressure-sensitive adhesive sheet has a substrate and a pressure-sensitive adhesive layer laminated on at least one side of the substrate. The pressure-sensitive adhesive layer contains a (meth)acrylic polymer having a weight average molecular weight of 10000 or more but less than 50000. Pressure-sensitive adhesive force, occurring after 30 minutes since the pressure-sensitive adhesive layer was attached to an ABS plate, is 1.0 [N/20 mm] or less, pressure-sensitive adhesive force, occurring after 24 hours since the pressure-sensitive adhesive layer was attached to an ABS plate, is 2.5 [N/20 mm] or less, and pressure-sensitive adhesive force, occurring after 30 minutes at 23° C. since the pressure-sensitive adhesive layer was attached to an ABS plate and then heated at 80° C. for 5 minutes, is 6.5 [N/20 mm] or more.

Abstract: A pressure-sensitive adhesive composition according to an embodiment includes: 100 parts by mass of a polymer (A) having a glass transition temperature lower than 0° C.; and 0.1 to 20 parts by mass of a polymer (B) that contains, as monomer units, both a monomer having a functional group equivalent (Fge) of 1000 g/mol?Fge<15000 g/mol and having a polyorganosiloxane skeleton and a monomer whose homopolymer has a glass transition temperature of 40° C. or higher, and that has a weight average molecular weight (MwB) of 10000?MwB?100000.

Abstract: Provided is a pressure-sensitive adhesive composition including: an acrylic polymer (A) having a glass transition temperature lower than 0 C.°; and a polymer (B) containing, as monomer units, both a monomer (B1) having a polyorganosiloxane skeleton and a monomer (B2) whose homopolymer has a glass transition temperature of 40 C.° or higher. The acrylic polymer (A) contains, as a monomer unit, at least one monomer selected from the group consisting of N-vinyl cyclic amides represented by the following general formula (M1): wherein R1 is a divalent organic group.

Abstract: A pressure-sensitive adhesive of the invention include a (meth)acryl-based polymer obtained by polymerization of a monomer component including 19 to 99.5% by weight of an alkyl (meth)acrylate having a branched alkyl group of 10 to 24 carbon atoms at an ester end. The pressure-sensitive adhesive has a satisfactory level of adhesive performance and can form a pressure-sensitive adhesive layer with a lower dielectric constant.

Abstract: The invention relates to a functionalized laminated optical element comprising: —An optical base element; —A functional film structure consisting of a single layer or a multilayer structure; —A layer of a pressure-sensitive adhesive of optical quality, placed between one surface of the optical base element and the functional film structure so as to permanently retain said functional film structure on the surface of the optical base element. Said functionalized laminated optical element maintains its integrity after typical processing of an optical article which includes wheel edging. More particularly the invention relates to the use of a specific adhesive system for improving the wheel edging resistance of functionalized laminated optical element. The functional laminated optical may be an ophthalmic lens.

Abstract: Provided is a PSA sheet having a PSA layer. The PSA sheet has a first face and a second face. The first face is a first adhesive face formed of one surface of the PSA layer. The first adhesive face has a 10-point mean roughness of 1000 nm or less. The PSA layer has a storage modulus of 0.08 MPa or greater at 100° C.

Abstract: A pressure-sensitive adhesive of the invention include a (meth)acryl-based polymer obtained by polymerization of a monomer component including 30 to 99.5% by weight of an alkyl (meth)acrylate having an alkyl group of 10 to 18 carbon atoms at an ester end and 0.5 to 50% by weight of a cyclic nitrogen-containing monomer. The pressure-sensitive adhesive has a satisfactory level of adhesive performance and can form a pressure-sensitive adhesive layer with a lower dielectric constant and reliable moisture resistance.

Abstract: Provided is a pressure-sensitive adhesive capable of realizing a pressure-sensitive adhesive layer having satisfactory adhesion performance and a high ink step absorbability. A radiation-curable pressure-sensitive adhesive, which contains a (meth)acryl-based polymer obtained by polymerizing a monomer component containing 30 to 90% by weight of an alkyl(meth)acrylate having an alkyl group of 10 to 22 carbon atoms at an ester end, and having a radically polymerizable functional group containing a carbon-carbon double bond.

Abstract: A pressure-sensitive adhesive sheet has a substrate and a pressure-sensitive adhesive layer laminated on at least one side of the substrate. The pressure-sensitive adhesive layer contains a (meth)acrylic polymer having a weight average molecular weight of 10000 or more but less than 50000. Pressure-sensitive adhesive force, occurring after 30 minutes since the pressure-sensitive adhesive layer was attached to an ABS plate, is 1.0 [N/20 mm] or less, pressure-sensitive adhesive force, occurring after 24 hours since the pressure-sensitive adhesive layer was attached to an ABS plate, is 2.5 [N/20 mm] or less, and pressure-sensitive adhesive force, occurring after 30 minutes at 23° C. since the pressure-sensitive adhesive layer was attached to an ABS plate and then heated at 80° C. for 5 minutes, is 6.5 [N/20 mm] or more.

Abstract: A pressure-sensitive adhesive sheet has a substrate and a pressure-sensitive adhesive layer laminated on at least one side of the substrate. The sheet is configured such that: pressure-sensitive adhesive force N1, occurring after the pressure-sensitive adhesive layer is attached to a stainless steel plate (430 BA plate) and is left at 23° C. for 10 seconds, is 1.0 [N/20 mm] or less; pressure-sensitive adhesive force N2, occurring after the pressure-sensitive adhesive layer is attached and is aged at 80° C. for 5 minutes, is 3.0 [N/20 mm] or more; and N2/N1 is 5.0 or more.

Abstract: A pressure-sensitive adhesive of the invention include a (meth)acryl-based polymer obtained by polymerization of a monomer component including 30 to 99.5% by weight of an alkyl (meth)acrylate having an alkyl group of 10 to 18 carbon atoms at an ester end and 0.5 to 50% by weight of a cyclic nitrogen-containing monomer. The pressure-sensitive adhesive has a satisfactory level of adhesive performance and can form a pressure-sensitive adhesive layer with a lower dielectric constant and reliable moisture resistance.

Abstract: Provided is a PSA composition for forming a PSA comprising a (meth)acrylic polymer, comprising, as monomeric components constituting the (meth)acrylic polymer: (A) a C2-18 alkyl (meth)acrylate, (B) an alicyclic monomer, and (C) a monomer having at least either a hydroxyl group or a carboxyl group. The average number of carbons of alkyl group in the (A) is 8 or less. The monomeric components comprise the (C) at 3% by weight or greater while the weights Wb and Wc of the (B) and (C) satisfy a relationship 0.8?Wb/Wc.

Abstract: A pressure-sensitive adhesive composition according to an embodiment includes: 100 parts by mass of a polymer (A) having a glass transition temperature lower than 0° C.; and 0.1 to 20 parts by mass of a polymer (B) that contains, as monomer units, both a monomer having a functional group equivalent (Fge) of 1000 g/mol?Fge<15000 g/mol and having a polyorganosiloxane skeleton and a monomer whose homopolymer has a glass transition temperature of 40° C. or higher, and that has a weight average molecular weight (MwB) of 10000?MwB?100000.

Abstract: A method for producing a polarizer of the present invention includes: subjecting a polyvinyl alcohol film to at least a dyeing process, a crosslinking process and a stretching process, then subjecting the film, in which all of the processes have been performed, having a water content of 25 to 55% by weight to a drying process, wherein in the drying process, the water content of the film is reduced by at least 15% by weight, so that the film has a water content of 5 to 35% by weight, and the drying process has a quick drying stage in which the water content of the film is reduced by at least 10% by weight in a time period of ½ to 1/30 of the total drying time of the drying process. The polarizer obtained by the production method has durability and has good optical properties over a wide band.

Abstract: A pressure-sensitive adhesive composition includes: 100 parts by mass of a polymer (A) (Tg:lower than 0° C.); 0.05 to 3 parts by mass of a (meth)acrylic polymer (B) (MWB:1000?MWB<50000, Tg:30 to 300° C.); and an organopolysiloxane compound (C) having a polyoxyalkylene chain, represented by any one of the following general formulae (C1) to (C3). [In (C1) to (C3), R1 is a monovalent organic group, each of R2 to R4 is an alkylene group, R5 is a hydrogen or an organic group, and each of a and b is an integer of 0 to 1000 (however, they are not 0 at a time); In (C1), each of m and n is an integer of 0 to 1000 (however, they are not 0 at a time); and In (C2) and (C3), m is an integer of 1 to 2000.