公开(公告)号：US11319462B2

公开(公告)日：2022-05-03

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 ,  C09J7/10 ,  C09J7/20 ,  C09J133/16 ,  C09J133/10 ,  C09J133/08 ,  C09J175/16 ,  C09J175/06 ,  C09J175/04 ,  C09J175/08 ,  C09J175/14 ,  C09J7/40 ,  C09J133/06

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.

公开(公告)号：US11319470B2

公开(公告)日：2022-05-03

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: C09J175/16 ,  C09J7/38 ,  C09J133/14 ,  C09J175/08 ,  C09J7/10 ,  C09J7/20 ,  C09J175/06 ,  C09J7/25 ,  G06F3/041 ,  C08F220/10

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.