ADHESIVE MEMBER FORMED AND DISPLAY DEVICE INCLUDING THE ADHESIVE MEMBER

    公开(公告)号:US20230126251A1

    公开(公告)日:2023-04-27

    申请号:US17868248

    申请日:2022-07-19

    发明人: Tetsuya FUJIWARA

    IPC分类号: H04M1/02 C09J133/08

    摘要: An adhesive member includes: a polymer derived from a resin composition including at least one (meth)acrylate monomer, at least one urethane (meth)acrylate oligomer, and at least one photoinitiator; a 180° peel force of about 2000 gf/25 mm to less than about 8000 gf/25 mm for a glass substrate at a temperature of about −20° C.; and a thermal expansion stress of about 0.1 N/mm2 to less than about 2 N/mm2 in accordance with changes in temperature from about −20° C. to about 60° C.

    ADHESIVE MEMBER AND DISPLAY DEVICE INCLUDING THE SAME

    公开(公告)号:US20230136807A1

    公开(公告)日:2023-05-04

    申请号:US17859494

    申请日:2022-07-07

    发明人: Tetsuya FUJIWARA

    IPC分类号: C09J175/06 C09J7/38

    摘要: An adhesive member includes a polymer derived from a resin composition. The resin composition includes at least one (meth)acrylate monomer, at least one urethane (meth)acrylate oligomer, and at least one photoinitiator. The adhesive member has a glass transition temperature in a range of about -70° C. to about -30° C., a 180 ° peel force of about 800 gf/25 mm or greater at a temperature of 25° C., and a deformation recovery rate in a range of about 75% to about 100% at temperatures of -20° C. and 60° C. The deformation recovery rate satisfies the following equation: X2 = [1-(X1/25)] x 100%, where X1 denotes a shear strain measured 600 seconds after removing a shear stress applied in a way such that the adhesive member has a shear strain of 25% at the temperatures of -20° C. and 60° C., and X2 denotes the deformation recovery rate

    RESIN COMPOSITION, ADHESIVE MEMBER, AND DISPLAY DEVICE INCLUDING THE SAME

    公开(公告)号:US20220177626A1

    公开(公告)日:2022-06-09

    申请号:US17383772

    申请日:2021-07-23

    发明人: Tetsuya FUJIWARA

    摘要: A resin composition may include a (meth)acrylate (A) comprising a hydroxy group and having a molecular weight of about 500 or less, and a polymer (B) comprising polyisoprene or polybutadiene as a main skeleton, having at least one radical reactive group in one molecule, and having a molecular weight in a range of about 2,000 to about 35,000, wherein the resin composition has a glass transition temperature in a range of about −50° C. to about 0° C. after the resin composition is cured, and the resin composition has a viscosity in a range of about 5 mPa·s to about 50 mPa·s at a temperature in a range of about 30° C. to about 50° C.

    ADHESIVE MEMBER, METHOD OF MANUFACTURING DISPLAY DEVICE INCLUDING FORMING THE ADHESIVE MEMBER, AND DISPLAY DEVICE MANUFACTURED THEREBY

    公开(公告)号:US20240209246A1

    公开(公告)日:2024-06-27

    申请号:US18471044

    申请日:2023-09-20

    发明人: Tetsuya FUJIWARA

    IPC分类号: C09J133/10

    摘要: An adhesive member of may include a polymer derived from a resin composition including at least one urethane (meth)acrylate oligomer including two (meth)acryloyl groups per oligomer unit, at least one polyfunctional (meth)acrylate monomer including multiple (meth)acryloyl groups per monomer unit, and at least one photoinitiator. The weight of the urethane (meth)acrylate oligomer may be 1 wt % or more and less than 10 wt %, and the weight of the polyfunctional (meth)acrylate monomer may be 0.2 wt % or more and less than 2 wt %, based on a total weight of the resin composition. The glass transition temperature of the adhesive member may be −10° C. or more and less than 10° C., and the loss tangent (tan δ) of the adhesive member at −40° C. may be 0.01 or more and less than 0.3. Accordingly, the adhesive member may undergo easy rework at −40° C. and show excellent or suitable adhesion reliability during use.

    RESIN COMPOSITION, ADHESIVE MEMBER, AND DISPLAY DEVICE INCLUDING THE SAME

    公开(公告)号:US20220169893A1

    公开(公告)日:2022-06-02

    申请号:US17381107

    申请日:2021-07-20

    发明人: Tetsuya FUJIWARA

    IPC分类号: C09J4/06 C09J133/06 G06F3/041

    摘要: A resin composition including at least one of a monofunctional (meth)acrylate having an imide ring structure or a monomer having a 2-pyrrolidone skeleton and a radical curable group in an amount of about 0.1 weight percent to about 5 weight percent based on the total weight of the resin composition, wherein the resin composition has a viscosity of about 5 millipascal seconds to less than about 50 millipascal seconds at 25° C., and wherein a glass transition temperature of the resin composition after being cured satisfies a value of about −50° C. to less than about 0° C.