US 12,264,241 B2
Hydrogenated copolymer, adhesive film, resin composition, and molded article
Hiroyuki Ichino, Tokyo (JP); Yasuhiro Kusanose, Tokyo (JP); Toshikazu Hoshina, Tokyo (JP); Takahiro Tsuji, Tokyo (JP); and Takahiro Hisasue, Tokyo (JP)
Assigned to Asahi Kasei Kabushiki Kaisha, Tokyo (JP)
Appl. No. 17/611,739
Filed by Asahi Kasei Kabushiki Kaisha, Tokyo (JP)
PCT Filed May 18, 2020, PCT No. PCT/JP2020/019615
§ 371(c)(1), (2) Date Nov. 16, 2021,
PCT Pub. No. WO2020/235521, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-097021 (JP), filed on May 23, 2019; and application No. 2019-207189 (JP), filed on Nov. 15, 2019.
Prior Publication US 2022/0243050 A1, Aug. 4, 2022
Int. Cl. C08L 53/02 (2006.01); C09J 153/02 (2006.01)
CPC C08L 53/02 (2013.01) [C09J 153/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A hydrogenated copolymer composition comprising
a hydrogenated copolymer (a) prepared by hydrogenating a copolymer of a vinyl aromatic compound and a conjugated diene compound, and
a hydrogenated copolymer (b) prepared by hydrogenating a copolymer of a vinyl aromatic compound and a conjugated diene compound, wherein
the hydrogenated copolymer (a) has one or more tan δ peaks at −20° C. or higher and one or more tan δ peaks at lower than −20° C. in viscoelasticity measurement (1 Hz),
the hydrogenated copolymer (b) has only one tan δ peak at 18° C. or higher in viscoelasticity measurement (1 Hz),
a mass ratio (a)/(b) of a content of the hydrogenated copolymer (a) to a content of the hydrogenated copolymer (b) is 5/95 to 95/5,
the hydrogenated copolymer (a) has a hydrogenated polymer block (B1) and a hydrogenated polymer block (B2),
the hydrogenated polymer block (B1) consists of a vinyl aromatic compound and a conjugated diene compound and has a content of the vinyl aromatic compound of 40 to 80 mass %,
the hydrogenated polymer block (B2) mainly comprises a conjugated diene compound and has a vinyl bond content of 60 to 100 mol % before hydrogenation, and
the hydrogenated copolymer (b) has a hydrogenated polymer block (B3) consisting of a vinyl aromatic compound and a conjugated diene compound and a content of the vinyl aromatic compound in the hydrogenated polymer block (B3) is 20 to 90 mass %.