MELT FILTER ALIGNMENT IN A CONTINUOUS MELT POLYCARBONATE PRODUCTION PROCESS

In an embodiment, a continuous melt polycarbonate polymerization process comprises: a step of forming a polymerized polycarbonate by melting and polymerizing a carbonate compound and a dihydroxy compound in the presence of a catalyst composition; a step of forming an adjusted polycarbonate by adding...

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Bibliographische Detailangaben
Hauptverfasser:	FERNANDEZ FERNANDO OLMEDO, FERNANDEZ IGNACIO VIC, LIOR RAUL HERNANDEZ
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	In an embodiment, a continuous melt polycarbonate polymerization process comprises: a step of forming a polymerized polycarbonate by melting and polymerizing a carbonate compound and a dihydroxy compound in the presence of a catalyst composition; a step of forming an adjusted polycarbonate by adding a viscosity-lowering agent to polymerized polycarbonate upstream of a first melt filter; a step of replacing the first melt filter with a replacement melt filter; a step of introducing the adjusted polycarbonate to the replacement melt filter; and a step of lowering the addition rate of the viscosity-lowering agent until the addition rate becomes 0 mol/hr. 일 구현예에 있어서, 연속적인 용융 폴리카보네이트의 중합 방법은, 카보네이트 화합물 및 디하이드록시 화합물을 촉매 조성물의 존재하에서 용융 중합하여, 중합된 폴리카보네이트를 형성하는 단계; 점도 저하제를 제1 용융 필터로 향하는 중합된 폴리카보네이트 스트림에 첨가하여 조절된 폴리카보네이트를 형성하는 단계; 상기 제1 용융 필터를 교체 용융 필터로 교체하는 단계; 상기 조절된 폴리카보네이트를 상기 교체 용융 필터에 도입하는 단계; 및 상기 점도 저하제의 첨가 속도가 0 몰/hr에 이를 때까지 상기 첨가 속도를 감소시키는 단계;를 포함한다.