METHOD FOR PREPARING MODIFIED CONJUGATED DIENE-BASED POLYMER

• Main Authors: PARK, Jae Hyeong, BAE, Hyo Jin, KANG, Suk Youn, AHN, Jeong Heon
• Format: Patent
• Language: English; French; Korean
• Published: 25.06.2020
• 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; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The present invention provides a method for preparing a modified conjugated diene-based polymer, the method comprising adding, during modification, a polyoxyethylene phosphate ester-based compound having a specific structure, along with sulfur chloride as a modifier, wherein modification reproducibility can be greatly improved and a stable process can be performed, the physical properties of a modified conjugated diene-based polymer according to modification conditions, particularly the rate of increase in Mooney viscosity and a change in the degree of branching, can be predicted, and the rate of increase in Mooney viscosity and the change in the degree of branching can be easily controlled by adjusting modification conditions. La présente invention concerne un procédé de préparation d'un polymère modifié à base de diènes conjugués, le procédé comprenant l'ajout, pendant la modification, d'un composé à base d'ester de phosphate de polyoxyéthylène présentant une structure spécifique, conjointement avec du chlorure de soufre en tant qu'agent modifiant, la reproductibilité de la modification pouvant être considérablement améliorée et un processus stable pouvant être mis en œuvre. Les propriétés physiques d'un polymère modifié à base de diènes conjugués peuvent être prédites selon les conditions de modification, en particulier la vitesse d'augmentation de la viscosité Mooney et un changement du degré de ramification, et la vitesse d'augmentation de la viscosité Mooney et le changement du degré de ramification peuvent être facilement régulés par ajustement des conditions de modification. 본 발명은 변성 시 변성제인 염화황과 함께 특정구조의 폴리옥시에틸렌 인산에스테계 화합물을 첨가하는 것을 특징으로 하는 변성 공액디엔계 중합체의 제조방법을 제공하는 것으로, 변성 재현성을 크게 개선시킬 수 있어 안정적인 공정을 수행할 수 있고, 변성 조건에 따른 변성 공액디엔계 중합체의 중합체의 물성, 특히 무니점도 증가율 및 분지도 변화 정도를 예측할 수 있으며, 변성 조건을 조절함으로써 무니점도 증가율, 분지도 변화 정도를 용이하게 제어할 수 있다.