公开(公告)号：US20230116659A1

公开(公告)日：2023-04-13

申请号：US17789165

申请日：2020-12-25

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Yasuhiro ISHIKAWA ,  Hajime WATANABE ,  Aki YAMADA

IPC: C08G77/448

Abstract: A polycarbonate-polyorganosiloxane copolymer comprises a polycarbonate block (A-1) formed of a repeating unit with a specific structure and a polyorganosiloxane block (A-2) containing a repeating unit with a specific structure. A difference between the haze value (haze A) after retention for 3 minutes and the haze value (haze B) after retention for 20 minutes, of the polycarbonate-polyorganosiloxane copolymer or a resin composition thereof at 300° C. or 340° C., Δhaze, is less than 0.4.