Abstract:
본 발명의 불연성 발포 폴리스티렌계 중합형 비드는 (a) 스티렌계 단량체 , (b) 챠르(char) 생성 열가소성 수지 및 (c) 무기 발포체 입자를 1차 중합하여 코어를 제조하고; 그리고 상기 코어에 유리전이온도가 120 ℃ 이하인 모노머를 투입하여 2차 중합하여 쉘을 형성하는 단계로 제조된다. 상기 불연성 발포 폴리스티렌계 중합형 비드로부터 제조된 발포체는 자기소화성 난연이 아닌 KS F ISO 5660-1, 난연 재료(난연3등급) 이상의 불연성, 단열성능 및 탁월한 기계적 강도를 나타낸다.
Abstract:
본 발명의 충격성이 우수한 스티렌계 열가소성 수지 조성물은 (A) 스티렌계 공중합체 수지 (a1) 및 고무변성 비닐계 그라프트 공중합체 (a2)로 이루어지는 군으로부터 선택된 하나 이상을 포함하는 열가소성 수지 10 내지 99 중량%, 및 (B) 실리콘계 화합물을 포함하여 제조된 분지구조 스티렌계 공중합체 수지 1 내지 90 중량%를 포함한다. 본 발명의 열가소성 수지 조성물은 분지구조 스티렌계 공중합체 수지를 적용함으로써 개선된 충격강도를 보이면서 향상된 유동성, 성형성 등의 물성이 우수한 수지 조성물을 제공하게 된다.
Abstract:
본 발명은 (A) 초고분자량 분지형 아크릴계 공중합체 수지 1 내지 100 중량부; (B) 아크릴계 수지 0 내지 99 중량부; 및 (A)+(B)로 이루어지는 기초수지 100 중량부에 대하여 (C) 아크릴계 충격보강제 0 내지 40 중량부를 포함하고, 상기 초고분자량 분지형 아크릴계 공중합체 수지 (A)가 (a1) 단관능성 아크릴 단량체 50 내지 99.899 중량%, (a2) 하기 화학식 1의 구조로 표시되는 유연구조(Flexible segment)를 가지는 (메타)아크릴계 단량체 0.1 내지 40 중량% 및 (a3) 분지구조 형성 단량체 0.001 내지 10 중량%를 포함하는 단량체 혼합물의 중합체 또는 이들 중합체의 혼합물인 것을 특징으로 하는 투명 열가소성 수지 조성물을 제공한다. 본 발명에 따른 투명 열가소성 수지 조성물은 우수한 투명성, 내스크래치성 및 충격강도 외에 우수한 유동성을 보일 수 있다.
상기 식에서, m은 3~18의 정수이며, X 및 Y는, 각각 독립적으로, 메틸기 또는 탄화수소기이다.
Abstract:
PURPOSE: Incombustible expandable polystyrene polymerized beads are provided to have excellent incombustibleness more than flame retardant material, and to have excellent mechanical strength, and not to induce environmental contamination, and to be able to be manufactured by low cost of equipment. CONSTITUTION: A manufacturing method of incombustible expandable polystyrene polymerized beads comprises: a step of manufacturing a core(10) by primary polymerizing a styrene based monomer, a char-generable thermoplastic resin, and an inorganic foam particles, and a step of forming a shell(20) by putting a monomer with the glass transition temperature of 120°C or lower, and secondary polymerizing the same. The incombustible expandable polystyrene polymerized bead comprises a core, and a shell surrounding the core, formed by polymerization of a monomer with the glass transition temperature of 120°C or less, and has a structure in which a blowing agent is impregnated into the core and the shell.
Abstract:
PURPOSE: A transparent thermoplastic resin composition is provided to have excellent flame retardancy, thermal resistance, physical properties and flowability, while maintaining inherent excellent transparency and scratch resistance characteristics. CONSTITUTION: A transparent thermoplastic resin composition comprises a phosphorous-based acrylic copolymer resin as a base resin. The copolymer resin comprises one or more of the acrylic monomers in chemical formula 1, and one or more of the phosphorus acrylic monomers in chemical formula 2. In the chemical formulas, R1 is -H or -CH3, R2 is -(CH2)n-CH3, n is an integer from 0-18, R3 is the functional group of chemical formula 2-a, t is an integer from 0-10, R4 and R5 are -O-(CH2)m-CH3, at least one of R4 and/or R5 is -O-CH3, and m is an integer from 0-5.
Abstract:
PURPOSE: A silicone-based impact modifier is provided to improve refractivity while maintaining existing properties and to ensure an excellent appearance property when applied to a thermoplastic resin. CONSTITUTION: A silicon-based impact modifier includes a graft-copolymer. The graft-copolymer comprises a core including a silicone-based rubber and alkyl acrylate, and a shell including inorganic acrylic compounds. The weight ratio of the shell to the core is 50:50-90:10. The core comprises 10-80 weight% of the silicone-based rubber and 20-90 weight% of alkyl acrylate. A thermoplastic resin composition includes 100 parts by weight of a thermoplastic resin and 1-30 parts by weight of the silicon-based impact modifier.
Abstract:
PURPOSE: A polycarbonate resin composition is provided to improve the commercial availability and the transparency of the composition, and to prevent the phase separation of the composition when melt-kneading the composition at high temperature. CONSTITUTION: A polycarbonate resin composition with the improved transparency and scratch resistance contains 10~99wt% of polycarbonate resin, and 1~90wt% of super low molecular weight high refractivity acrylic copolymer. The super low molecular weight high refractivity acrylic copolymer is a copolymer formed with 5~100wt% of aromatic or aliphatic methacrylate marked with chemical formula 1 or 2, and 0~95wt% of mono-functional unsaturated monomer.
Abstract:
A method for preparing thermoplastic resins is provided to produce the thermoplastic resins having both scratch resistance and transparency by polymerizing acrylic monomer in the presence of organophilic colloidal nanoparticles having vinyl groups. A method for preparing thermoplastic resins having improved scratch resistance includes the steps of: mixing water-dispersible colloidal nanoparticles with alcohol and ion exchanged water, dropping 5-25wt%, based on the water-dispersible colloidal nanoparticles, of an alkoxy silane compound, and performing a reaction to prepare colloidal nanoparticles having organophilic vinyl groups; and emulsion-polymerizing acrylic monomer and the colloidal nanoparticles having organophilic vinyl groups.