PREPARATION METHOD FOR ETHYLENE-VINYL ACETATE COPOLYMER

• Main Authors: CHEONG JAE YOUP, JOE DAEJUNE, CHUN MOON SEOK, KIM DOYUN, SONG SUNGJIN, KWON KYUNG AN
• Format: Patent
• Language: English; Korean
• Published: 11.05.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The present invention provides a method for preparing an ethylene-vinyl acetate copolymer showing improved melting strength properties by having high molecular weight or ethylene content with a structure of long chain branch (LCB) in the molecule and being capable of improving brittleness in the manufacture of molded articles as a result. 본 발명에서는 분자내 장쇄 분지(long chain branch; LCB)의 구조와 함께, 높은 분자량 또는 에틸렌 함량을 가져, 향상된 용융 강도 특성을 나타내며, 결과로서 성형품의 제조시 취성(brittleness)을 개선시킬 수 있는, 에틸렌 비닐아세테이트 공중합체의 제조방법이 제공된다.