Abstract:
본 발명은 사이클로펜탄에 대한 우수한 내성과 기계적 성질이 잘 조화된 전기냉장고의 내상재료로 사용될 수 있는 고충격 고무변성 폴리스티렌계 수지의 제조방법에 관한 것으로, 고무변성 폴리스티렌수지(I)와 상용성이 있는, 부타디엔계 고무중합체 15 내지 60중량부에 불포화니트릴 5 내지 20중량% 알케닐 방향족 탄화수소 80내지 95중량%로 구성되는 단량체 혼합물 40 내지 85중량부을 그라프트공중합하여 얻어진 그라프트공중합체 수지(II)를 제조하고 수지(I)과 수지(II)의 중량비를 0.6~6의 범위로 혼합하는 것을 특징으로 한다.
Abstract:
본 발명은 높은 내약품성을 가지며 가공성과 내충격 특성이 우수한 고니트릴계 수지의 제조방법에 관한 것이다. 본 발명은 불포화니트릴 단량체와 알케닐방향족탄화수소 단량체의 혼합물을 고무중합체라텍스 존재하에서 중합반응시켜 고함량의 불포화니트릴 수지를 제조하는 방법에 있어서, 1차로 전체 단량체 중 10 내지 30중량%의 불포화니트릴 단량체 및 알케닐방향족 탄화수소 단량체 혼합물을 초기에 투입하여 유화상태에서 중합을 개시하고, 연속하여 중합반응 중에 생성되는 중합체의 불포화 니트릴 함유율이 중합개시부터 중합종료 시점까지 6% 이내의 변동범위로 유지되도록 잔류 불포화니트릴 및 알케닐방향족 탄화수소를 탄화수소를 연속적 흑은 간헐적으로 투입하여 유화중합하는 것을 특징으로 한다. 이와 같은 방법에 의하여 제조된 수지는 조성이 균일하므로 내약품성, 가공성, 충격특성 등이 우수하다.
Abstract:
본원 발명은 유기 및 무기 혼합물 코팅층을 포함하는 분리막으로서, 내열성 및 전극과의 접착력이 우수한 폴리올레핀계 다공성 분리막에 관한 것이다. 구체적으로, 본원 발명은 중량 평균 분자량이 1,000,000 g/mol 이상인 폴리비닐리덴 플루오라이드 호모폴리머, 중량 평균 분자량이 800,000 g/mol 이하인 폴리비닐리덴 플루오라이드-헥사플루오로프로필렌 코폴리머 및 무기 입자를 함유하는 유기 및 무기 혼합물로 코팅된 분리막으로서, 접착력 및 열적 안정성이 우수하여 양극과 음극의 단락을 억제하고, 나아가 이를 활용한 전기 화학 전지의 안정성을 향상시키는 전지용 다공성 분리막에 관한 것이다.
Abstract:
PURPOSE: A polyolefin group porous separating film has a high potter quantity and density and an excellent thermal conductivity by lowering porosity between particles with using a mixture of an inorganic particle in which an average particle diameter is large; and an inorganic particle in which an average particle diameter is small as the inorganic particle. CONSTITUTION: A polyolefin group porous separating film comprises an organic and an inorganic mixture coating layer in one side or both sides of a polyolefin group porous basic film; a thermal conductivity is more than 0.3 w/mk. The inorganic particle is a particle of different average particle diameter which is selected from a group which comprises a particle which has 5-90 nm of average particle diameter and a particle which has 150-600 nm of average particle diameter. The coating layer contains 70-90 weight% of inorganic particle and 10-30 weight% of polymer binder. A potter quantity of the separating film is 5-10 g/m, and the thickness of the coating layer is 1-7 micron.
Abstract:
본 발명의 폴리카보네이트 수지의 제조 방법은 디아릴카보네이트와 방향족 디히드록시 화합물을 알칼리, 알칼리 토금속 또는 이들의 혼합으로 이루어진 촉매의 존재 하에서 에스테르 교환반응시켜 폴리카보네이트를 제조하는 방법에 있어서, 생성된 폴리카보네이트에 특정 구조의 술폰산 에스테르 화합물을 투입하여 폴리카보네이트 수지의 안정성을 향상시키는 것을 특징으로 한다. 폴리카보네이트, 알칼리 금속, 촉매실활제, 열안정성, 색상안정성, 내가수분해성
Abstract:
A polycarbonate resin composition is provided to improve the chemical resistance while maintaining the impact resistance and to be useful for the exterior of electric and electronic appliances or vehicles. A polycarbonate resin composition comprises (A) an amorphous poly carbonate resin 50-80 parts by weight and (B) a crystalline polycarbonate resin 20-50 parts by weight. The amorphous poly carbonate resin (A) is selected from the group consisting of linear polycarbonate, branched polycarbonate, polyestercarbonate copolymer and their mixture. The crysrtallinity degree of the crystalline polycarbonate resin (B) is 15-25%. The resin composition more includes the additives selected from the group consisting of a surfactant, nucleating agent, coupling agent, filler, plasticizer, MBS, lubricant, antimicrobial agent, release agent, thermal stabilizer, antioxidant, photostabilizer, compatibilizing agents, inorganic additive, coloring agent, stabilizer, antistatic agent, pigment, dye, flame retardant and their mixture.
Abstract:
A method for preparing a branched polycarbonate resin is provided to allow effective control of the molecular structure, molecular weight and terminal hydroxyl group content of a branched polycarbonate resin, and to inhibit gelling. A method for preparing a branched polycarbonate resin comprises the steps of: carrying out transesterification of an aromatic dihydroxyl compound and diallyl carbonate to form a linear polycarbonate prepolymer; removing the excessive amount of diallyl carbonate and reaction byproducts from the linear polycarbonate prepolymer; and introducing a branching agent to the linear polycarbonate prepolymer from which diallyl carbonate and byproducts are removed and carrying out a reaction.
Abstract:
PURPOSE: Provided is a method for producing a rubber-modified polystyrene resin having excellent surface gloss and high impact resistance, which has a structure dispersed with 2 or more of polybutadiene rubber particles having different particle sizes on polystyrene which is a matrix. CONSTITUTION: The method comprises the steps of (i) introducing a stock solution of 80-95 wt% of styrene-based monomer(A) and 5-20 wt% of butadiene-based rubber polymer(B), and organized clay mineral(C) into the first reactor, and polymerizing the reactants at 90-150 deg.C to convert a phase of rubber component to dispersing particles; and (ii) introducing a polymer formed in the first reactor into the second reactor maintained at 130-180 deg.C, to complete a polymerization. The clay mineral is selected from smectites type of clays such as montmorillonite, saponite, and hectorite, or a mixture thereof.
Abstract:
PURPOSE: A thermoplastic resin composite material and its preparation method are provided to improve mechanical strength and heat resistance without deterioration of impact resistance by dispersing the clay mineral into a thermoplastic resin uniformly. CONSTITUTION: The thermoplastic resin composite material comprises 100 parts by weight of a polymer prepared from a vinyl-based monomer or a mixture of two or more kinds of vinyl-based monomers; and 0.1-50 parts by weight of a clay mineral modified by ion exchange reaction using an onium ion-containing compound having an azo group or peroxide group. The nano-sized clay mineral is dispersed into the polymer uniformly. The method comprises the steps of modifying the clay mineral by ion exchange reaction using an onium ion-containing compound having an azo group or peroxide group; and emulsion polymerizing a polymer prepared from a vinyl-based monomer or a mixture of two or more kinds of vinyl-based monomers by using the modified clay mineral as an emulsifier. Preferably the emulsion polymerization is carried out by using a molecular weight controlling agent.