The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Apr. 22, 2021
Samyang Corporation, Seoul, KR;
Yun Ju Chang, Daejeon, KR;
Kyung Moo Shin, Chilgok-gun, KR;
Ki Tae Kang, Gimpo-si, KR;
Mi Ran Kim, Daejeon, KR;
Seung Pil Jung, Gwangju-si, KR;
Jin Sik Choi, Daejeon, KR;
Seong Hyen Heo, Sejong-si, KR;
SAMYANG CORPORATION, Seoul, KR;
Abstract
The present invention relates to a polysiloxane-polycarbonate copolymer using a hydroxyl terminated polysiloxane mixture, and a method for producing same, and more specifically, to: a polysiloxane-polycarbonate copolymer which includes hydroxy-terminated polysiloxanes of chemical formulae 1 and 2 in a specific weight ratio as repeating units, and thus exhibits excellent transmittance and low-temperature impact strength compared to the case of using either of the hydroxy-terminated polysiloxanes by itself, and in which the overall production yield of the raw material polysiloxane is improved, such that the polysiloxane-polycarbonate copolymer is excellent in terms of economics; and a method for producing same.