Abstract:
PURPOSE: Provided is a monodispersed polymer having a full-IPN structure, which has an easily controllable particle size, excellent uniformity of particle size, heat resistance and mechanical properties suitable to be used as a spacer for a liquid crystal display device. CONSTITUTION: The monodispersed polymer microparticles having a full-IPN structure is prepared by the method comprising the steps of: dissolving a long-chain crosslinking agent, a monomer, an oil soluble initiator and a stabilizer in an alcohol, carrying out a dispersion polymerization, and repeatedly washing and drying by centrifugal separation to obtain powdery crosslinked seed particles; redispersing the seed particles in water dissolved with 0.1-0.5% of an emulsifier by ultrasonic wave; emulsifying a secondary crosslinked monomer in which an oil soluble initiator is dissolved into water dissolved with 0.1-0.5% of an emulsifier by a mechanical agitator to introduce the secondary monomer into the seed dispersion and to swell them; and stabilizing the swelled polymer dispersion by using a dispersion stabilizer, and polymerizing, washing and drying the polymer dispersion.
Abstract:
PURPOSE: A method for preparing a monodisperse polymer particle having the full IPN structure and a monodisperse polymer particle prepared by the method are provided, wherein the polymer particle has excellent thermal stability, elasticity and mechanical properties. CONSTITUTION: The method comprises the steps of dissolving a polydimethylsiloxane-based crosslinking agent represented by the formula 1 or 2(wherein R' is H or CH3; and n is an integer of 5-600), a radical polymerizable monomer, an initiator and a dispersion stabilizer in an alcohol to prepare a monodisperse crosslinking seed particle by dispersion polymerization at a temperature of 50-80 deg.C; re-dispersing the obtained crosslinking seed particle in an aqueous medium wherein an emulsifier is dissolved, and introducing a monomer where an initiator is dissolved into the solution to swelling it; and stabilizing the swollen polymer particle by using a dispersion stabilizer and polymerizing it.
Abstract:
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 코팅층을 포함하며, 상기 코팅층 내 용매 잔존량이 100 ppm 이하가 되어, 접착력 및 열에 의한 형태 안정성이 우수한 분리막에 관한 것이다. 구체적으로, 본원 발명은 접착력이 우수하고 방열성이 뛰어난 코팅층과 기재 필름이 강하게 접착된 분리막으로서, 열수축이 효과적으로 억제된 분리막에 관한 것이다. 또한, 접착력이 강하고 열 수축 억제성이 뛰어난 상기 분리막을 적용함으로써, 과열에 의한 전극의 단락이 방지되고 전지의 안정성이 향상되어 장기간 사용 가능한 전기 화학 전지에 관한 것이다.
Abstract:
본 발명의 폴리오가노실세스퀴옥산 확산제는 평균입경크기가 다른 2종의 폴리오가노실세스퀴옥산 미립자가 특정 비율로 혼합되어 이중크기분포를 갖는 것을 특징으로 한다. 본 발명은 이중크기분포를 갖는 폴리오가노실세스퀴옥산 미립자를 광확산제로 사용함으로써, 우수한 휘도 및 내광 특성을 발현한다. 이중크기분포, 폴리오가노실세스퀴옥산 미립자, 확산제, 휘도, 내광성, 광확산판
Abstract:
A microparticle for light diffusion, a method for preparing the microparticle, and a light diffusion plate using the microparticle as a diffuser are provided to improve brightness and light resistance. A microparticle for light diffusion comprise a core which comprises polyorganosilsesquioxane microparticle; and a shell which comprises a crosslinking polymer resin having a refractive index difference of 0.05 or more with the polyorganosilsesquioxane and coats the core. Preferably the polyorganosilsesquioxane has a repeating unit represented by RSiO_(1.5-x/2) OH_x, wherein R is a C1-C6 alkyl group, a vinyl group or an aryl group; and x is 0-1.5.
Abstract:
A method for preparing a polyorganosilsesquioxane fine particle, the polyorganosilsesquioxane fine particle prepared by the method, a thermoplastic resin composition containing the particle, and a diffusion plate for an LCD TV containing the particle are provided to use the polyorganosilsesquioxane fine particle as a diffusing agent for improving brightness and light resistance. A method for preparing a polyorganosilsesquioxane fine particle comprises the steps of mixing an organochlorosilane and an organotrialkoxysilane so as to make the concentration of organochlorosilane be 100-2,000 ppm; mixing the obtained one with water to prepare a transparent sol; and maintaining the pH of the sol to be 8-11. Preferably the organochlorosilane is represented by R1Si(OR2)_(3-x) Clx and the organotrialkoxysilane is represented by R1Si(OR2)3, wherein R1 is a C1-C6 alkyl group, a vinyl group or an aryl group; R2 is a C1-C5 alkyl group; and x is 1-3.
Abstract:
Provided are highly reliable conductive particles, which comprise polymer resin particles showing excellent adhesion to a metal layer, have excellent conductivity and electric connection reliability, and are useful for producing an anisotropic conductive adhesive film. The highly reliable conductive particles(1) comprise: polymer resin particles(11) having a plurality of fine pores and/or irregularities on the surface thereof and obtained through polymerization of 10-90 parts by weight of at least one crosslinkable monomer with 90-10 parts by weight of an unsaturated monomer copolymerizable with the crosslinkable monomer based on 100 parts of the total monomers; and a conductive metal layer(12) coated on the surface of the polymer resin particles.
Abstract:
본 발명은 액정 표시 장치 등의 평판 디스플레이에서 전기적 접속 부재로 널리 사용되고 있는 이방 전도성 미립자에 관한 것으로, 전기적 신뢰성 및 도금밀착성이 우수한 특성을 지닌 전도성 미립자를 제공하는 것을 그 목적으로 한다. 이를 위해 본 발명은, 통상의 무전해 도금 방법에 의해 미세 기재 입자를 전도성의 금속 층으로 피복하되, 기재 입자로서 다공성의 미립자를 적용하여 표면 금속 피복층과 기재미립자 간의 계면적을 극대화하여 도금 밀착성을 획기적으로 향상시킨 새로운 전기 전도성 미립자를 제공한다. 전도성 미립자, 무전해 도금, 다공성 미립자, 도금 밀착성
Abstract:
본 발명은 회로 접속 시 열 압착에 의해 가압 방향으로만 전도성을 띄는 이방성 도전성 미립자에 관한 것으로, 도전성 미립자의 외 층에 절연 입자를 불연속적 부착 시킨 후 일정 범위 내에서의 가열 압착에서 절연 입자가 용이하게 이탈함으로써 도전성 미립자의 금속층이 전극간 접속을 유도하고, 가열 압착의 영향을 받지 않는 입자는 절연층이 유지되어 전극간 또는 도전성 미립자 간의 통전을 막아 주는 것을 특징으로 한다. 이러한 절연 도전성 미립자는 일정 온도 및 압력 하에서 절연 입자의 고착이 유지되며, 일정의 가열 압착 시에만 절연 입자가 이탈함으로써 입자의 안정한 도전 성능을 구현하는 것을 특징으로 한다. 절연 도전성 미립자, 절연 미립자, 이방 도전성 필름
Abstract:
Provided are a conductive fine particle which is excellent in electrical reliance and is increased in the number of added conductive fine particles, its preparation method, an anisotropic conductive adhesive composition containing the particle, and an anisotropic conductive film containing the particle. The conductive fine particle(2) comprises a polymer fine particle(11) as a base, and at least two kinds of conductive metal coating layers(21) formed on the surface of the base by electroless plating, wherein the conductive metal coating layers have a continuous concentration gradient from the base. Preferably the metal constituting the conductive metal coating layers comprises two or three kinds of metals selected from the group consisting of Ni, Ni-P, Ni-B, Au, Ag, Ti and Cu; and the conductive metal coating layer has a thickness of 0.01-1 micrometers.