公开(公告)号：US20240279407A1

公开(公告)日：2024-08-22

申请号：US18292194

申请日：2022-07-29

Applicant: CJ CHEILJEDANG CORPORATION

Inventor： Yoo-Kyoung SHIM ,  Soyun PARK ,  Jeung Yil PARK ,  Jin Su CHUNG

IPC: C08J3/11 ,  C08J3/07

CPC classification number: C08J3/11 ,  C08J3/07 ,  C08J2367/04

Abstract: The present invention relates to a polyhydroxyalkanoate (PHA) dispersion and a preparation method therefor. Specifically, according to one embodiment of the present invention, a method for preparing a PHA dispersion comprises a step of dispersing a PHA in a solvent by using particle dispersion, melt dispersion or solvent extraction, so that a PHA dispersion, which comprises PHA particles having an average diameter of 0.5-5 μm and a deviation of diameter of ±0.3 μm, can be prepared, and thus dispersibility, dispersion stability and processability can be improved.

公开(公告)号：US20240343939A1

公开(公告)日：2024-10-17

申请号：US18292759

申请日：2022-07-29

Applicant: CJ CHEILJEDANG CORPORATION

Inventor： Soyun PARK ,  Yoo-Kyoung SHIM ,  Jeung Yil PARK ,  Jin Su CHUNG

IPC: C09D167/04 ,  C08G63/06 ,  C09D5/00 ,  C09D5/16

CPC classification number: C09D167/04 ,  C08G63/06 ,  C09D5/00 ,  C09D5/16 ,  C08G2230/00

Abstract: The present invention relates to a biodegradable coating composition, a method for manufacturing same, and a biodegradable article using same. Specifically, according to one embodiment of the present invention, the biodegradable coating composition is a copolymerized polyhydroxyalkanoate resin that comprises a polyhydroxyalkanoate (PHA) resin and a dispersant having a degree of saponification of at least 42 mol %, and comprises 4-hydroxybutyrate (4-HB) repeating units. Due to including 0.1 wt % to 60 wt % of the 4-hydroxybutyrate (4-HB) repeating units with respect to the total weight of the copolymerized polyhydroxyalkanoate resin, the biodegradable coating composition has excellent biodegradability and biocompatibility and can thus improve dispersibility, coating properties, water resistance, and processability while being environmentally friendly.