US 12,269,921 B2
Polycarbonate copolymer, method for preparing same, and composition comprising same
Jin Seo Lee, Seoul (KR); Do Kyoung Kim, Seoul (KR); Do Hyun Seo, Seoul (KR); Min Jae Jeong, Seoul (KR); and Seung Hwan Moon, Seoul (KR)
Assigned to HANWHA SOLUTIONS CORPORATION, Seoul (KR)
Filed by HANWHA SOLUTIONS CORPORATION, Seoul (KR)
Filed on Sep. 24, 2024, as Appl. No. 18/894,159.
Application 18/894,159 is a continuation of application No. PCT/KR2023/003952, filed on Mar. 24, 2023.
Claims priority of application No. 10-2022-0037040 (KR), filed on Mar. 25, 2022.
Prior Publication US 2025/0019495 A1, Jan. 16, 2025
Int. Cl. C08G 64/16 (2006.01); C08G 64/30 (2006.01)
CPC C08G 64/16 (2013.01) [C08G 64/30 (2013.01); C08G 64/302 (2013.01); C08G 64/305 (2013.01)] 16 Claims
 
1. A polycarbonate copolymer comprising:
a unit derived from at least one primary dihydroxyl compound; and
units derived from at least two secondary dihydroxyl compounds,
wherein the polycarbonate copolymer has a pencil hardness higher than H as measured according to a pencil hardness test (ISO 15184) and a glass transition temperature (Tg) of about 90 to about 160° C. as measured according to ISO 11357.