BIODEGRADABLE POLYMER RESIN COMPOSITION AND MOLDED PRODUCT THEREOF

• Main Authors: PARK, Ji Hae, PAEK, Kwang Hyun, HWANG, Yong Taek
• Format: Patent
• Language: English; French; Korean
• Published: 04.04.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The present invention relates to a biodegradable polymer resin composition and a molded product thereof, the biodegradable polymer resin composition being capable of realizing biodegradability and excellent physical properties and having improved mold formability. The biodegradable polymer resin composition may comprise: a polycarbonate-polyester copolymer comprising a branched repeating unit including an intermediate functional group having a central element and 5 to 10 alkylene or hetero alkylene functional groups bonded to the intermediate functional group, an aliphatic polycarbonate repeating unit having a chain structure, and an aromatic polyester repeating unit; and a biodegradable polyester resin having a melting index (measured at 190 °C and 2.16 kg) of 3 g/10 min to 20 g/10 min. La présente invention concerne une composition de résine polymère biodégradable et un produit moulé associé, la composition de résine polymère biodégradable étant capable de conférer une biodégradabilité et d'excellentes propriétés physiques et ayant une aptitude au façonnage en moule améliorée. La composition de résine polymère biodégradable peut comprendre : un copolymère polycarbonate-polyester comprenant un motif répété ramifié comprenant un groupe fonctionnel intermédiaire ayant un élément central et 5 à 10 groupes fonctionnels alkylène ou hétéro-alkylène liés au groupe fonctionnel intermédiaire, un motif répété de polycarbonate aliphatique ayant une structure de chaîne, et un motif répété de polyester aromatique; et une résine de polyester biodégradable ayant un indice de fluidité à chaud (mesuré à 190 °C et 2,16 kg) de 3 g/10 min à 20 g/10 min. 본 발명은, 생분해성과 함께 우수한 기계적 물성을 구현할 수 있고, 성형 가공성이 향상된 생분해성 고분자 수지 조성물 및 이의 성형품에 관한 것으로 상기 생분해성 고분자 수지 조성물은 중심원소를 포함한 매개 작용기와 상기 매개 작용기에 결합한 5개 내지 10개의 알킬렌 또는 헤테로 알킬렌 작용기를 포함한 가지형 반복 단위, 사슬 구조의 지방족 폴리카보네이트 반복단위, 및 방향족 폴리에스테르 반복단위를 포함하는 폴리카보네이트 -폴리에스터 공중합체; 및 용융지수 (190 °C, 2.16 kg에서 측정)가 3g/10분 내지 20g/10분인 생분해성 폴리에스테르 수지를 포함할 수 있다.