公开(公告)号：US20170306197A1

公开(公告)日：2017-10-26

申请号：US15492415

申请日：2017-04-20

Applicant: NITTO DENKO CORPORATION

Inventor： Kayo SHIMOKAWA ,  Ryoko ASAI ,  Taiki SHIMOKURI ,  Yoshiaki ITO ,  Tatsuya YAMASAKI

IPC: C09J135/02 ,  B32B27/30 ,  G02B5/30 ,  C09J5/06 ,  G02B1/14 ,  B32B7/12 ,  B32B37/14

Abstract: A curable resin composition for forming an adhesive layer on at least one surface of a substrate (C), the curable resin composition comprising: a compound (A) represented by formula (1): wherein X represents a functional group containing a reactive group, and R1 and R2 each independently represent a hydrogen atom or an optionally substituted, aliphatic hydrocarbon, aryl, or heterocyclic group; and an adhesion aid compound (B), the curable resin composition satisfying formula (X): −10≦HSP (A)−HSP (B)≦10 and formula (Y): −10≦HSP (C)−HSP (B)≦10, wherein HSP (A) is an HSP value of the compound (A), HSP (B) is an HSP value of the adhesion aid compound (B), and HSP (C) is an HSP value of the substrate (C).

公开(公告)号：US20210246338A1

公开(公告)日：2021-08-12

申请号：US17053875

申请日：2020-01-20

Applicant: NITTO DENKO CORPORATION

Inventor： Shou TAKARADA ,  Taiki SHIMOKURI ,  Minako NODA

IPC: C09J7/38 ,  G02B5/30 ,  C09J7/40 ,  C09J133/06 ,  C09J133/08

Abstract: A pressure sensitive adhesive sheet (11) according to the present invention contains an acryl-based base polymer having a crosslinked structure, and an acryl-based oligomer having a glass transition temperature of 60° C. or higher. The pressure sensitive adhesive sheet has a storage elastic modulus G′25 of 5 to 75 kPa at 25° C. and 1 Hz, a loss tangent tan δ25 of 0.2 to 0.45 at 25° C. and 1 Hz, a loss tangent tan δ100 of 0.2 to 0.45 at 100° C. and 1 Hz, a difference between the tan 625 and the tan δ100 of −0.09 to 0.09, and a glass transition temperature of −15° C. or lower.

公开(公告)号：US20210214587A1

公开(公告)日：2021-07-15

申请号：US16967504

申请日：2019-01-28

Applicant: Nitto Denko Corporation

Inventor： Naofumi KOSAKA ,  Yosuke SHIMIZU ,  Satoshi HONDA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Masayuki SATAKE ,  Kenichi OKADA ,  Atsushi TAKASHIMA ,  Ginji MIZUHARA ,  Masayuki OKAMOTO ,  Ryoko ASAI

IPC: C09J7/38 ,  C09J11/08 ,  C09J11/06 ,  C09J133/08 ,  B32B27/30 ,  B32B27/18 ,  B32B7/06 ,  B32B37/12 ,  B32B37/18 ,  B32B38/10

Abstract: Provided is a PSA sheet having a PSA layer. The PSA layer includes a layer A forming at least one surface thereof. The PSA sheet has an adhesive strength N0 of 2.0 N/10 mm or greater, after one day at room temperature following application of the layer A side to a surface of an alkaline float glass plate as an adherend having a contact angle of 5°-10° with distilled water; has an N1 to N0 reduction rate of 30% or lower, wherein N1 is a water-resistant adhesive strength measured after stored at room temperature for one day, immersed in water for 30 minutes, taken out from the water and then residual water is wiped off; and has an N2 to N0 reduction rate of 40% or higher, wherein N2 is a water-peel strength measured after stored at room temperature for one day, 20 μL distilled water is dropped onto the adherend and is allowed to enter a PSA layer/adherend interfacial edge. N2 is measured at a tensile speed of 300 mm/min at a peel angle of 180°.

公开(公告)号：US20190233681A1

公开(公告)日：2019-08-01

申请号：US16260563

申请日：2019-01-29

Applicant: NITTO DENKO CORPORATION

Inventor： Masahito NIWA ,  Itsuhiro HATANAKA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Takahiro NONAKA ,  Keisuke HIRANO ,  Fumika KAWATAKE ,  Mika IKEMURA

IPC: C09J7/38 ,  C09J7/25 ,  C09J175/08 ,  C09J133/14 ,  C08F220/10 ,  G06F3/041

CPC classification number: C09J7/38 ,  C08F220/10 ,  C09J7/255 ,  C09J133/14 ,  C09J175/08 ,  G06F3/041

Abstract: A pressure sensitive adhesive includes an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment. In the acryl-based base polymer, the content of the urethane-based segment is 3 to 20 parts by weight based on 100 parts by weight of the acryl-based segment. A pressure sensitive adhesive sheet can be obtained by applying a pressure sensitive adhesive composition on a substrate in a layer form. The pressure sensitive adhesive composition may be curable and may include a polymerization initiator. In formation of the pressure sensitive adhesive sheet, the curable pressure sensitive adhesive composition may be, as necessary.

公开(公告)号：US20240368435A1

公开(公告)日：2024-11-07

申请号：US18773082

申请日：2024-07-15

Applicant: NITTO DENKO CORPORATION

Inventor： Naofumi KOSAKA ,  Yosuke SHIMIZU ,  Satoshi HONDA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Masayuki SATAKE ,  Kenichi OKADA ,  Atsushi TAKASHIMA ,  Ginji MIZUHARA ,  Masayuki OKAMOTO ,  Ryoko ASAI

IPC: C09J7/38 ,  B32B7/06 ,  B32B27/18 ,  B32B27/30 ,  B32B37/12 ,  B32B37/18 ,  B32B38/10 ,  C09J11/06 ,  C09J11/08 ,  C09J133/08

Abstract: Provided is a PSA sheet having a PSA layer. The PSA layer includes a layer A forming at least one surface thereof. The PSA sheet has an adhesive strength N0 of 2.0 N/10 mm or greater, after one day at room temperature following application of the layer A side to a surface of an alkaline float glass plate as an adherend having a contact angle of 5°-10° with distilled water; has an N1 to N0 reduction rate of 30% or lower, wherein N1 is a water-resistant adhesive strength measured after stored at room temperature for one day, immersed in water for 30 minutes, taken out from the water and then residual water is wiped off, and has an N2 to N0 reduction rate of 40% or higher, wherein N2 is a water-peel strength measured after stored at room temperature for one day, 20 μL distilled water is dropped onto the adherend and is allowed to enter a PSA layer/adherend interfacial edge. N2 is measured at a tensile speed of 300 mm/min at a peel angle of 180°.

公开(公告)号：US20210230455A1

公开(公告)日：2021-07-29

申请号：US16967517

申请日：2019-01-28

Applicant: Nitto Denko Corporation

Inventor： Naofumi KOSAKA ,  Yosuke SHIMIZU ,  Satoshi HONDA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Masayuki SATAKE ,  Kenichi OKADA ,  Atsushi TAKASHIMA ,  Ginji MIZUHARA

IPC: C09J7/38 ,  C09J133/08 ,  C09J5/02 ,  B32B7/06 ,  B32B7/12 ,  B32B43/00

Abstract: Provided is a method for peeling a PSA sheet adhered on a polarizing plate. The PSA sheet has a PSA layer. The PSA layer includes a layer A forming at least one surface of the PSA layer. Of the polarizing plate, the surface to which the PSA sheet is adhered is corona-treated or plasma-treated. The peeling method includes a water-peel step in which the PSA sheet is peeled from the polarizing plate, in a state where an aqueous liquid exits at the interface between the polarizing plate and the PSA sheet at the front line of peeling the PSA sheet from the polarizing plate, with the aqueous liquid allowed to further enter the interface following the movement of the peel front line.

公开(公告)号：US20190233683A1

公开(公告)日：2019-08-01

申请号：US16260459

申请日：2019-01-29

Applicant: NITTO DENKO CORPORATION

Inventor： Itsuhiro HATANAKA ,  Masahito NIWA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Takahiro NONAKA ,  Keisuke HIRANO ,  Fumika KAWATAKE ,  Mika IKEMURA

IPC: C09J7/38 ,  C09J7/40 ,  C09J133/06 ,  C09J133/10

CPC classification number: C09J7/385 ,  C08L75/06 ,  C08L75/08 ,  C09J7/401 ,  C09J133/066 ,  C09J133/10 ,  C09J2205/114

Abstract: The pressure sensitive adhesive sheet is a sheet shaped pressure sensitive adhesive including an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment, and a content of the urethane-based segment is 3 to 30 parts by weight based on 100 parts by weight of the acryl-based segment. The urethane-based segment includes at least one urethane chain selected from the group consisting of a polyether urethane and a polyester urethane. The content of the urethane-based segment other than the polyether urethane-based segment is 15 parts by weight or less based on 100 parts by weight of the acryl-based segment.