Abstract:
본 발명은 폴리실록산-폴리카보네이트 공중합체의 제조 방법에 관한 것이다. 본 발명은 루이스 산 붕소 화합물을 촉매로 사용하여 방향족 히드록시 화합물을 양쪽 말단으로 갖는 폴리실록산의 제조와 상기 붕소 화합물의 분리 과정 없이 인 시투로 폴리실록산-폴리카보네이트 공중합체를 제조하는 방법에 관한 것이다.
Abstract:
본 발명의 폴리카보네이트 수지 조성물은 폴리카보네이트 100 중량부; 및 중량평균분자량 1,000 g/mol 이상의 폴리에테르 폴리올 0.01 내지 0.50 중량부를 포함한다. 상기 폴리카보네이트 수지 조성물은 투명성 및 고온 열안정성이 우수하여 도광판 등에 적합하게 적용될 수 있다.
Abstract:
A method for manufacturing recyclable polycarbonate of the present invention comprises the steps of forming molten material by heating phenols D., aromatic carbonate, and waste poly carbonate; pressing the molten materials; and polymerizing poly carbonate by reducing the pressure to the molten materials. The manufacturing method of recyclable poly carbonate uses waste poly carbonate products as reacting materials for a poly carbonate melting polymerization process.
Abstract:
A supported catalyst of the present invention comprises: a metallic oxide carrier including at least one among cerium oxide (CeO_2) and zinc oxide (ZnO); and a catalyst supported by the metallic oxide carrier. The catalyst comprises at least one among metallic oxides of nickel oxide (NiO) and zirconium oxide (ZrO_2). The catalyst is improved in terms of acid-base properties, thereby enabling highly-efficient preparation of dimethyl carbonate from methanol and carbon dioxide.
Abstract:
본 발명은 폴리카보네이트 수지 및 이의 제조방법에 관한 것으로, 보다 상세하게는 방향족 디히드록시 화합물과 디아릴카보네이트를 중합하여 폴리카보네이트 제조시 중합 후 용융 단계에서 디포스페이트계 인계 화합물을 투입시켜 폴리카보네이트 수지를 제조하는 방법에 관한 것이다. 본 발명에 따른 난연성 방향족 폴리카보네이트 수지 제조방법은 수지의 중합과정에서 디포스페이트계 인계 화합물을 첨가함으로써 인계 화합물의 유실을 줄여 적은 양의 인계 화합물 첨가로도 난연성 향상시키고, 수지의 열이력 횟수를 최소화하여 투명도를 높일 수 있으며, 제조공정이 간편하여 경제적인 특징을 가진다.
Abstract:
The present invention relates to a highly branched polycarbonate resin having a Mark-Houwink constant of 0.50 to 0.60 and branches of 0.5 to 1. The highly branched polycarbonate resin according to the present invention is manufactured by a specific polymerization mode to be eco-friendly, has maximized branches, and has no loss of quality caused by an addition reaction for forming networking between resins.
Abstract:
The invention relates to a method for preparing polysiloxane-polycarbonate copolymer, and to manufacture of polysilxane having aromatic hydroxy compounds for both ends, using Lewis acid boron compounds as a catalysta, and to a preparing method of polysiloxane-polycarbonate copolymer with an in-situ process without a separating process of the boron compound.
Abstract:
PURPOSE: A polycondensation resin manufacturing method is provided to efficiently prepare a high quality polycondensation resin that is not damaged by fusions between lower order condenstates themselves or scaling in a pipe of the lower order condensates. CONSTITUTION: A polycondensation resin manufacturing method including a process of solid polymerizing a crystalline pulverulent body of a lower order condensate, wherein the method comprises the following steps of: preparing the crystalline pulverulent body of a lower order condensate; mixing the obtained crystalline pulverulent body of a lower order condensate and a granular molding body of a thermoplastic resin; and solid-polymerizing 'the pulverulent body of a lower order condensate and the granular molding body of the thermoplastic resin'. A mixed amount of the granular molding body of the thermoplastic resin is 0.1 to 10wt% based on the crystalline pulverulent body of a lower order condensate.
Abstract:
PURPOSE: A polycarbonate resin composition is provided to improve thermal stability, and weatherability, especially visible ray transmittance, weatherability, thermal stability, etc. CONSTITUTION: A polycarbonate resin composition comprises polycarbonate resin, a UV stabilizer based on a first benzotriazole in chemical formula 1, a UV stabilizer based on a second benzotriazoles in chemical formula 2, a UV stabilizer based on bismalonate in chemical formula 3, and a phosphate-based thermal stabilizer. In chemical formulas, R, R1, R2, R3, R4, R5 and R6 is respectively and independently hydrogen, a C1-20 linear or branched alkyl group, a C6-20 aryl group, or C6-20 aryl group substituted to a C1-10 alkyl group.