POLY CYCLOHEXYLENEDIMETHYLENE TEREPHTHALATE AND METHOD FOR SYNTHESIZING THEREOF

The purpose of the present invention is to provide a method of preparing modified polycyclohexylenedimethylene terephthalate-based resins which not only have improved crystallization rate, melting point and intrinsic viscosity, but also have good colors. A method of preparing modified polycyclohexyl...

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Bibliographische Detailangaben
1. Verfasser:	KIM, SANG KEON
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 USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	The purpose of the present invention is to provide a method of preparing modified polycyclohexylenedimethylene terephthalate-based resins which not only have improved crystallization rate, melting point and intrinsic viscosity, but also have good colors. A method of preparing modified polycyclohexylenedimethylene terephthalate-based resins according to the present invention comprises: injecting (a) a dicarboxylic acid compound comprised of dimethylterephthalate, terephthalic acid or a mixture thereof, (b) a diol compound comprised of 80 mole% or more of 1,4-cyclohexanedimethanol based on total mole number of the diol compound such that the dicarboxylic acid compound and the diol compound have a molar ratio of 1:1.1 to 1:2.0, (c) 50 to 1000 μmol% of trimethylolpropane, trimellitic anhydride or a mixture thereof based on the mole number of the dicarboxylic acid compound, and (d) an antioxidant; performing an esterification reaction and a transesterification reaction under a nitrogen stream and a catalyst at 270 °C to 300 °C to form an oligomer, and performing a polycondensation reaction on the oligomer at 285 °C to 320 °C and a subatmospheric pressure. 본 발명의 폴리시클로헥산디메틸테레프탈레이트계 수지의 제조 방법은, 반응기 내에 (a) 디메틸테레프탈레이트, 테레프탈산 또는 이의 혼합물로 구성된 디카르복실산 화합물과, (b) 1,4-시클로헥산디메탄올 함량이 전체 디올 화합물 몰수를 기준으로 80㏖% 이상인 디올 화합물을 디카르복실산 화합물과 디올 화합물의 몰비가 1:1.1 ~ 1:2.0 가 되도록 투입하고, (c) 상기 디카르복실산 화합물 몰수를 기준으로 트리메티롤프로판(trimethylolpropane) 또는 트리멜리틱안하이드라이드(trimellitic anhydride) 또는 이의 혼합물 50 ~ 1000 μ㏖% 및 (d) 산화안정제를 투입하고, 질소 기류, 촉매 하에서 270℃ ~ 300℃ 에서 에스테르화 반응 또는 에스테르 교환반응시켜 올리고머를 생성시킨 다음, 285℃ ~ 320℃ 감압 하에서 축중합 반응시키는 것을 특징으로 하여, 결정화 속도, 융점 및 고유점도가 향상되고, 색상도 양호한 개질된 PCT계 수지를 제공한다.