Abstract:
The present invention relates to a polymer resin composition for interior and exterior materials of vehicles, a molded resin article for interior and exterior materials of vehicles , and a method for preparing the same and, more specifically, to a polymer resin composition for interior and exterior materials of vehicles, which includes a polypropylene resin, a polylactic acid resin, glass fibers, a copolymer including an ethylene repeated unit and a (meth)acrylate-base repeated unit, and a sulfonic acid compound, and a molded resin article. The polymer resin composition and a molded resin article for interior and exterior materials of vehicles contain a certain content or more of a material derived from biomass, thereby being environmentally friendly and having the excellent mechanical properties such as the heat resistance and impact resistance.
Abstract:
The present invention relates to a method for producing lactide using a solvent. In a second step when the lactide is produced, an ionic liquid is used as a solvent so that the mobility of a reactant is ensured. Then, reaction temperature is decreased and moisture generated during the reaction is absorbed from the ionic liquid, so that the lactide which is weak in the presence of moisture is not decomposed. In addition, the lactide can be continuously produced by continuously adding oligomers. The contamination of a reactor caused by a reaction by-product is minimized by means of the ionic liquid, and a solvent for washing the reactor is not needed. Furthermore, by means of the high boiling point of the ionic liquid, the ionic liquid can be easily collected and recycled.
Abstract:
The present invention relates to a high heat dissipation polylactic acid composite material composition and a method of manufacturing the same, and more specifically, to a high heat dissipation polylactic acid composite material composition in which an L-polylactic acid resin, a D-polylactic acid resin, and a carbon fiber are mixed so that heat dissipation and mechanical properties are improved; has a low environmental load effect by replacing to a low-carbon-biomass based material instead of an existing general-purpose polymer resin; and can be used in various industrial material fields such as automobile parts, electronic equipment housing, etc. using the same, and a method of manufacturing the same. [Reference numerals] (AA) Carbon fiber (CNT growth on surface); (BB) Housing; (CC) Heat generating device
Abstract:
The present invention relates to a preparing method of lactide from a lactic acid at high yield. A low molecular weight polylactic acid is obtained by a polymerization reaction based on a D type lactic acid as a starting material and is thermally decomposed to manufacture D type lactide to obtain the D type lactide at high yield based on a simple method. The manufacturing costs of polylactic acid resin can be reduced using the D type lactide as the raw material of a D type polylactic acid. The lactide can be used for various uses such as vehicle engine, chassis parts, bioplastic, and display housing as biomass derived materials. [Reference numerals] (AA) Perform fermentation from biomass;(BB) Extract and separate D type lactic acid;(CC) Convert the D type lactic acid into D type lactide;(DD) Polymerize D type polylactic acid;(EE) Pulverize the polymer
Abstract:
본 발명은 액상의 D타입 유산으로부터 D타입 락타이드를 제조하는 방법 및 제조된 D타입 락타이드로부터 중량평균 분자량 50,000 ~ 20,000g/mol의 D타입 폴리유산을 제조하는 방법에 관한 것이다. 본 발명의 방법은 기존의 제조 방법에 비해 간단한 공법으로 고수율의 D타입락타이드를 얻을 수 있는 장점이 있다. 결국 상기 D타입 락타이드로부터 최종적으로 얻어지는 D타입 폴리유산의 원가를 낮출 수 있는 장점이 있다.
Abstract:
PURPOSE: A method for preparing type D lactide from type D lactic acid of a liquid phase is provided to lower cost for preparing type D polylactic acid. CONSTITUTION: A method for preparing type D lactide comprises: a step of converting type D lactic acid into type D polylactic acid at 130-150 Deg. C. and a pressure of 10-200 torr; a step of heating the type D polylactic acid under a zinc oxide catalyst at 230-240 Deg. C. to convert the liquid phase into a gas phase stream; a step of cooling the gas phase stream at -78 Deg. C. to 10 Deg. C. and separating the gas phase stream into unreacted lactic acid and a mixture; a step of mixing the mixture and water and isolating type D lactide. [Reference numerals] (a) Reactor; (b) Mixture; (c) Lactic acid recycle; (d) Water; (e) Pure lactide
Abstract:
본 발명은 바이오 나일론-46과 석유계 나일론-6을 메트릭스 수지로 포함하고 있고, 유리섬유를 강화재로 포함하고 있음으로써 기존의 석유계 나일론 복합재에 대비하여 열적 및 기계적 물성이 보다 향상되는 효과를 나타내는 친환경 바이오 나일론 복합재에 관한 것이다. 본 발명의 바이오 나일론 복합재는 고 내열성 및 고 물성을 가지고 있음으로써, 현재 차량용 소재로 적용되는 석유계 나일론-6과 유리섬유로 된 복합재를 대체하여 사용할 수 있는 친환경 소재로 적합하다.