Patent application number | Description | Published |
20120058346 | Multilayer Film - The present invention relates to a multilayer film coextruded from an aliphatic polycarbonate and polylactic acid-based polymer and a method for producing the same. According to the present invention, a multilayer film having excellent adhesive property can be manufactured even without a separate adhesive layer. | 03-08-2012 |
20120065360 | PREPARATION OF POLY(ALKYLENE CARBONATE) CONTAINING CROSS-LINKED HIGH MOLECULAR WEIGHT CHAINS - Provided is preparation of poly(alkylene carbonate) through alternating copolymerization of carbon dioxide and epoxide. According to the disclosure, by introducing a diepoxide compound to alternating copolymerization of carbon dioxide and epoxide compound using a metal(III) prepared with salen-type ligands containing quaternary ammonium salt as a catalyst, some of the polymer chains may be cross-linked to thus increase an average molecular weight of the copolymer and extend a distribution of molecular weight. A resin prepared according to this method may have high mechanical strength and rheological advantages. | 03-15-2012 |
20120157592 | Composition of Rotogravure Hotmelt Ink Containing Polypropylene Carbonate - Provided is an eco-friendly rotogravure hot melt ink composition. More specifically, the present invention provides the rotogravure hot melt ink composition meeting requirements of a carbon footprint system by using, as a vehicle, poly propylene carbonate prepared using carbon dioxide as a raw material. The rotogravure hot melt ink prepared by the composition of the present invention has a higher printing density and more easily performs printing at low temperature than a poly vinyl acetate based hot melt ink according to the related art. | 06-21-2012 |
20120165479 | Method for Improving Thermal Stability of Polypropylene Carbonate - Provided is a method for improving thermal stability of polypropylene carbonate and, more particularly, a method of end capping a molecular chain of polypropylene carbonate using a urethane group by adding isocyanates or diisocyanates to a polypropylene carbonate resin, which may optionally be a mixture containing tertiary polyol, so as to delay thermal degradation of the polypropylene carbonate at a high temperature, thereby securing desired thermal stability. Especially, the method capable of being easily applied to reactive extrusion after preparing the polypropylene carbonate has been proposed, thus simplifying production processes and ensuring economical advantages. Moreover, the above method does not deteriorate transparency and specific smoke density characteristics at combustion, which are advantages of the polypropylene carbonate. | 06-28-2012 |
20120171392 | Optical Films with Controlled Surface Morphology and the Method of Manufacturing the Same - Provided are an optical film for use in flat panel display (FPD) devices, and a method for manufacturing the same. Particularly, there is provided a method for imparting surface roughness to an optical film, which includes forming dented craters having a radius of curvature of 10 nm-100 μm on the surface of an optical film obtained by a solution casting process and forming a plateau between one crater and another crater. There is also provided an optical film obtained by the same method. | 07-05-2012 |
20130102715 | ECO-FRIENDLY POLY(ALKYLENE CARBONATE) RESIN COMPOSITION FOR HIGH-TRANSPARENCY AND HIGH-GLOSS SHEET - Provided is an eco-friendly poly(propylene carbonate) resin composition for a sheet, which is characterized by using a poly(alkylene carbonate) resin developed by efficiently utilizing carbon dioxide, which is a major contributor to global warding, as a main material, and including appropriate additives, such as, a strength modifier, and a flexibilizer, thereby completely solving environmental hazards controversy of the existing polyvinyl chloride resin products; exhibiting excellent mechanical and thermal properties, processability, post processability (printability, embossing and surface treatment, laminating characteristics) and superior anti-flaming property (low smoke density) and elongation characteristics as compared with the existing polyvinyl chloride resin products; and overcoming an extruding production method which is a small-sized production manner, corresponding to a big defect in thermoplastic plastics emerged as substitutes for polyvinyl chloride resin products and thus applying a calendering process method which is a mass production manner. | 04-25-2013 |
20130172434 | METHOD FOR PREPARING RESIN COMPOSITION FOR EXPANDABLE POLYPROPYLENE CARBONATE AND EXPANDABLE POLYPROPYLENE CARBONATE PREPARED THEREFROM - Provided herein are a method for preparing a resin composition for an expandable polypropylene carbonate and an expandable polypropylene carbonate prepared therefrom. More particularly, the present invention relates to a method for preparing a resin composition for an expandable polypropylene carbonate capable of using supercritical carbon dioxide as a foaming agent and preparing a foam having excellent moldability by an appropriate foaming method, and an expandable polypropylene carbonate prepared therefrom. The expandable polypropylene carbonate capable of having high magnification, excellent thermal stability, and dimensional stability may be prepared by using the resin composition according to the present invention. | 07-04-2013 |
20140037965 | "Multilayer Film" - The present invention relates to a multilayer film coextruded from an aliphatic polycarbonate and polylactic acid-based polymer and a method for producing the same. According to the present invention, a multilayer film having excellent adhesive property can be manufactured even without a separate adhesive layer. | 02-06-2014 |
20140206835 | Hot Melt Composition - Provided is a hot melt adhesive composition including aliphatic polycarbonate. With the hot melt adhesive composition according to the present invention, the pyrolysis temperature is low, such that the harmful gas is not generated at the time of waste treatment, resulting in providing an excellent environmentally friendly product. In addition, the hot melt adhesive composition has the low melting temperature to thereby be usable at low temperature and exhibit sufficient adhesive strength. | 07-24-2014 |
20140296474 | PREPARATION OF POLY(ALKYLENE CARBONATE) CONTAINING CROSS-LINKED HIGH MOLECULAR WEIGHT CHAINS - Provided is preparation of poly(alkylene carbonate) through alternating copolymerization of carbon dioxide and epoxide. According to the disclosure, by introducing a diepoxide compound to alternating copolymerization of carbon dioxide and epoxide compound using a metal(III) prepared with salen-type ligands containing quaternary ammonium salt as a catalyst, some of the polymer chains may be cross-linked to thus increase an average molecular weight of the copolymer and extend a distribution of molecular weight. A resin prepared according to this method may have high mechanical strength and rheological advantages. | 10-02-2014 |
20140316053 | Composition of the Hot-Melt Adhesive Improved Cold Resistance - Provided is a hot-melt adhesive composition having a cold resistance, and more particularly, a hot-melt adhesive composition including an aliphatic polycarbonate resin obtained by copolymerization of carbon dioxide and polypropylene oxide, and a cold resistance improver. | 10-23-2014 |
20140326313 | Resin Composition for Encapsulating Film of Photovoltaic Module and Photovoltaic Module Using the Same - Provided are a resin composition for an encapsulating film of a photovoltaic module, and a photovoltaic module us ing the same, and more particularly, a resin composition for an encapsulating film of a photovoltaic module, having low moisture permeability and excellent adhesiveness due to thermal compression, and a photovoltaic module using the same, and thus, in the case where the resin composition for an encapsulating film of a photovoltaic module is used for a front sheet, a back sheet, or both of the front and back sheets, of a photovoltaic module, the resin composition can be used without an adhesive due to excellent transparency and durability against ultraviolet light and high adhesive strength with respect to glass, and thus can exhibit excellent compatibility. | 11-06-2014 |