公开(公告)号：US20220011490A1

公开(公告)日：2022-01-13

申请号：US17294462

申请日：2019-11-08

Applicant: ZEON CORPORATION

Inventor： Kazuki KUMAZAWA ,  Hironari SUDEJI

IPC: G02B5/30 ,  C08L53/02 ,  B29C48/00 ,  B29C48/08 ,  B29C71/02

Abstract: An optical film formed of a resin C including a copolymer P containing a polymerization unit A and a polymerization unit B, wherein the optical film includes a phase separation structure that expresses structural birefringence, the phase separation structure includes a phase (A) containing as a main component the polymerization unit A and a phase (B) containing as a main component the polymerization unit B, and |n(A)−n(B)| is 0.12 or more.

公开(公告)号：US20250091969A1

公开(公告)日：2025-03-20

申请号：US18726868

申请日：2023-01-06

Applicant: ZEON CORPORATION

Inventor： Kazuki KUMAZAWA ,  Shigetaka HAYANO

IPC: C07C4/22

Abstract: A method for recovering cyclopentene, includes allowing a metathesis catalyst to act on a ring-opened polymer having a structural unit derived from cyclopentene to recover cyclopentene.

公开(公告)号：US20220011491A1

公开(公告)日：2022-01-13

申请号：US17295258

申请日：2019-11-08

Applicant: ZEON CORPORATION

Inventor： Kazuki KUMAZAWA ,  Hironari SUDEJI

IPC: G02B5/30 ,  C08F297/04

Abstract: An optical film formed of a resin C including a copolymer P containing a polymerization unit A and a polymerization unit B, wherein the optical film includes a phase separation structure that expresses structural birefringence, the phase separation structure includes a phase containing as a main component the polymerization unit A and a phase containing as a main component the polymerization unit B, and a value of Rth/d calculated from the thickness-direction retardation Rth (nm) and thickness d (nm) is 2.5×10-3 or more.