公开(公告)号：US10800944B2

公开(公告)日：2020-10-13

申请号：US15671633

申请日：2017-08-08

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki Kigami ,  Yasushi Buzojima ,  Kenta Jozuka ,  Midori Segawa ,  Masataka Nishiwaki ,  Ryo Morioka

IPC: C09J7/38 ,  C09J7/10 ,  C09J11/06 ,  C08K5/3475 ,  C09J133/08 ,  C09J7/00 ,  B32B7/06 ,  B32B7/12 ,  C09J9/00 ,  C23F15/00 ,  C09J133/06

Abstract: Provided is a pressure-sensitive adhesive (PSA) sheet including a PSA layer formed from a PSA composition including a base polymer, crosslinking agents of two or more species having mutually different types of crosslinkable functional groups, and an azole-based rust inhibitor. Here, one of the crosslinking agents of two or more species is an isocyanate-based crosslinking agent. Monomeric components constituting the base polymer include a carboxy group-containing monomer. The amount of the azole-based rust inhibitor in the PSA layer is less than 8 parts by weight with respect to 100 parts by weight of the base polymer.

公开(公告)号：US20200255701A1

公开(公告)日：2020-08-13

申请号：US16777217

申请日：2020-01-30

Applicant: NITTO DENKO CORPORATION

Inventor： Naohiro KATO ,  Masahito Niwa ,  Yasushi Buzojima ,  Naoaki Higuchi ,  Masataka Nishiwaki

IPC: C09J7/38 ,  C09J7/10

Abstract: Provided is a double-sided pressure-sensitive adhesive tape that can express both of excellent impact resistance and excellent oil resistance. The double-sided pressure-sensitive adhesive tape includes a pressure-sensitive adhesive layer laminate obtained by laminating “n” or more pressure-sensitive adhesive layers, wherein “n” represents an integer of 2 or more, wherein each of the pressure-sensitive adhesive layers is formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), and wherein the monomer component (m) contains 50 wt % or more of butyl acrylate.

公开(公告)号：US20200095473A1

公开(公告)日：2020-03-26

申请号：US16576948

申请日：2019-09-20

Applicant: NITTO DENKO CORPORATION

Inventor： Shigeki Watanabe ,  Masahito Niwa ,  Masataka Nishiwaki ,  Kazuki Minoura

IPC: C09J7/38 ,  C09J11/06 ,  B32B27/06

Abstract: Provided is a PSA sheet for use in electronic devices. The PSA sheet has a PSA layer formed from a natural rubber-based PSA. The base polymer of the PSA comprises a methyl methacrylate-modified natural rubber and at least 50% of all carbons in the PSA layer comes from biomass-derived carbons. The PSA sheet shows a displaced length of 1.0 mm/60 min or less in a heat-resistant holding power test carried out at 80° C.

公开(公告)号：US11891551B2

公开(公告)日：2024-02-06

申请号：US17070257

申请日：2020-10-14

Applicant: NITTO DENKO CORPORATION

Inventor： Takuya Fujita ,  Hiromichi Sumida ,  Masahito Niwa ,  Masataka Nishiwaki ,  Yasushi Buzojima

IPC: C09J7/25 ,  C09J7/38

CPC classification number: C09J7/385 ,  C09J7/25 ,  C09J2301/124 ,  C09J2433/00 ,  C09J2475/006

Abstract: A double-sided pressure-sensitive adhesive tape having excellent impact resistance, excellent reworkability, and excellent alcohol resistance. The double-sided pressure-sensitive adhesive tape includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate, wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C. and 50% RH, of from 30 N/m to 150 N/m.

公开(公告)号：US20200096810A1

公开(公告)日：2020-03-26

申请号：US16576898

申请日：2019-09-20

Applicant: Nitto Denko Corporation

Inventor： Masataka Nishiwaki ,  Kazuki Minoura ,  Kenta Jozuka ,  Naohiro Kato

IPC: G02F1/1333 ,  G02F1/1335 ,  C09J7/38

Abstract: Provided is a PSA sheet that can be processed with excellent precision while providing excellent light-blocking properties in an in-plane direction and in the thickness direction in an embodiment where the support substrate has a limited thickness. The PSA sheet has a support substrate having a thickness less than 75 μm and a PSA layer placed at least on one face of the support substrate. The PSA sheet has light transmittances of 0.04% or lower in XY and Z directions thereof.

公开(公告)号：US11926771B2

公开(公告)日：2024-03-12

申请号：US17070257

申请日：2020-10-14

Applicant: NITTO DENKO CORPORATION

Inventor： Takuya Fujita ,  Hiromichi Sumida ,  Masahito Niwa ,  Masataka Nishiwaki ,  Yasushi Buzojima

IPC: C09J7/25 ,  C09J7/38

CPC classification number: C09J7/385 ,  C09J7/25 ,  C09J2301/124 ,  C09J2433/00 ,  C09J2475/006

Abstract: A double-sided pressure-sensitive adhesive tape having excellent impact resistance, excellent reworkability, and excellent alcohol resistance. The double-sided pressure-sensitive adhesive tape includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate, wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C. and 50% RH, of from 30 N/m to 150 N/m.

公开(公告)号：US11512232B2

公开(公告)日：2022-11-29

申请号：US16656985

申请日：2019-10-18

Applicant: NITTO DENKO CORPORATION

Inventor： Ryo Morioka ,  Masataka Nishiwaki ,  Toshiki Ikami ,  Yasushi Buzojima

IPC: C09J7/38 ,  C09J7/40 ,  C08K3/04 ,  B32B7/12

Abstract: The invention provides a PSA sheet having a PSA layer exhibiting superior light shielding. Provided is a PSA sheet comprising a PSA layer that includes a PSA polymer. Carbon black particles are dispersed in the PSA layer. The average particle size of the carbon black particles dispersed in the PSA layer is 300 nm or smaller. The average particle size is an average particle size determined on the basis of a number-based particle size distribution by TEM observation.

公开(公告)号：US20210189190A1

公开(公告)日：2021-06-24

申请号：US17070257

申请日：2020-10-14

Applicant: NITTO DENKO CORPORATION

Inventor： Takuya FUJITA ,  Hiromichi Sumida ,  Masahito Niwa ,  Masataka Nishiwaki ,  Yasushi Buzojima

IPC: C09J7/38 ,  C09J7/25

Abstract: A double-sided pressure-sensitive adhesive tape having excellent impact resistance, excellent reworkability, and excellent alcohol resistance. The double-sided pressure-sensitive adhesive tape includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate, wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C. and 50% RH, of from 30 N/m to 150 N/m.

公开(公告)号：US10983377B2

公开(公告)日：2021-04-20

申请号：US16576898

申请日：2019-09-20

Applicant: NITTO DENKO CORPORATION

Inventor： Masataka Nishiwaki ,  Kazuki Minoura ,  Kenta Jozuka ,  Naohiro Kato

IPC: G02F1/1333 ,  C09J7/38 ,  G02F1/1335

Abstract: Provided is a PSA sheet that can be processed with excellent precision while providing excellent light-blocking properties in an in-plane direction and in the thickness direction in an embodiment where the support substrate has a limited thickness. The PSA sheet has a support substrate having a thickness less than 75 μm and a PSA layer placed at least on one face of the support substrate. The PSA sheet has light transmittances of 0.04% or lower in XY and Z directions thereof.

公开(公告)号：US20200208022A1

公开(公告)日：2020-07-02

申请号：US16722241

申请日：2019-12-20

Applicant: NITTO DENKO CORPORATION

Inventor： Masahito Niwa ,  Shigeki Watanabe ,  Masataka Nishiwaki ,  Kazuki Minoura

IPC: C09J7/38 ,  C09J11/08

Abstract: Provided is a PSA sheet with reduced dependence on fossil-resource-based materials while having an acrylic PSA. The PSA sheet provided includes a PSA layer. The PSA layer is formed from a PSA composition including an acrylic polymer. The acrylic polymer is a polymer of monomers that include more than 50% (by weight) acrylic monomer. At least 50% of all carbons in the PSA layer are biomass-derived carbons. The PSA sheet has a peel strength of less than 3 N/20 mm to a stainless steel plate.