Abstract: According to the present disclosure, when drip coffee is extracted, it may learn drip coffee recipe information of a barista to be imitated and extract the drip coffee based on the learned reference acidity and reference concentration. The extracted drip coffee may be compared with the learned reference acidity and the reference concentration and evaluated, and when the acidity and concentration of the drip coffee are matched with the reference acidity and the reference concentration, the drip coffee having the same acidity and concentration as the drip coffee may be extracted. Alternatively, when the acidity and concentration of the drip coffee are not matched with the reference acidity and the reference concentration, drip coffee having the same or/and similar acidity and concentration as or/and to the reference acidity and the reference concentration may be extracted by changing extraction conditions of the drip coffee through reinforcement learning.

Abstract: According to the present disclosure, when drip coffee is extracted, it may learn drip coffee recipe information of a barista to be imitated and extract the drip coffee based on the learned reference acidity and reference concentration. The extracted drip coffee may be compared with the learned reference acidity and the reference concentration and evaluated, and when the acidity and concentration of the drip coffee are matched with the reference acidity and the reference concentration, the drip coffee having the same acidity and concentration as the drip coffee may be extracted. Alternatively, when the acidity and concentration of the drip coffee are not matched with the reference acidity and the reference concentration, drip coffee having the same or/and similar acidity and concentration as or/and to the reference acidity and the reference concentration may be extracted by changing extraction conditions of the drip coffee through reinforcement learning.

Abstract: The present disclosure provides an aluminum alloy with enhanced penetration resistance for a heat exchanger, the alloy containing copper (Cu), silicon (Si), and iron (Fe) equal to or smaller than predetermined contents respectively, and further containing zirconium (Zr) and the remainder being aluminum (Al). Further, the present disclosure provides an aluminum extruded tube and/or an aluminum fin with enhanced penetration resistance made of the alloy respectively. Further, the present disclosure provides a heat exchanger comprising the tube and/or fin. Addition and content-control of the alloy element may spread corrosion initiations and suppress intergranular corrosion to create uniform corrosion. In this manner, the present alloy have superior corrosion resistance compared to pitting corrosion of a previous alloy for a heat exchanger, and, at the same time, have an extrusion rate equal to that of the previous A1070.

Abstract: The present invention relates to hexafluoropropylene oxide polymer composition and a process of preparing ofhexafluoropropylene oxide polymer by an anionic polymerization, and in particular the hexafluoropropylene oxide polymer composition comprises an anionic initiator, a polar solvent, hexafluoropropylene and hexafluoropropylene oxide. The hexafluoropropylene oxide polymer is prepared under particular reaction conditions by using the composition, hexafluoropropylene oxide poylymer prepared by using the composition according to a preparation process herein has a weight average molecular weight (Mw) of 1,500-4,000 at ?10 to 20° C.

Abstract: The present disclosure provides an aluminum alloy with enhanced penetration resistance for a heat exchanger, the alloy containing copper (Cu), and iron (Fe), whose contents are controlled to be equal to or smaller than predetermined contents respectively, and further containing zirconium (Zr), titanium (Ti), or hafnium (Hf), or a mixture thereof and the remainder being aluminum (Al). Further, the present disclosure provides an aluminum extruded tube and/or an aluminum fin with enhanced penetration resistance made of the alloy respectively. Further, the present disclosure provides a heat exchanger comprising the tube and/or fin. Addition and content-control of the alloy element may spread corrosion initiations and suppress intergranular corrosion to create uniform corrosion. In this manner, the present alloy have superior corrosion resistance compared to pitting corrosion of a previous alloy for a heat exchanger, and, at the same time, have an extrusion rate equal to that of the previous A1070.

Abstract: The present disclosure provides an aluminum alloy with enhanced penetration resistance for a heat exchanger, the alloy containing copper (Cu), silicon (Si), and iron (Fe) equal to or smaller than predetermined contents respectively, and further containing zirconium (Zr) and the remainder being aluminum (Al). Further, the present disclosure provides an aluminum extruded tube and/or an aluminum fin with enhanced penetration resistance made of the alloy respectively. Further, the present disclosure provides a heat exchanger comprising the tube and/or fin. Addition and content-control of the alloy element may spread corrosion initiations and suppress intergranular corrosion to create uniform corrosion. In this manner, the present alloy have superior corrosion resistance compared to pitting corrosion of a previous alloy for a heat exchanger, and, at the same time, have an extrusion rate equal to that of the previous A1070.

Abstract: The present invention relates to hexafluoropropylene oxide polymer composition and a process of preparing of hexafluoropropylene oxide polymer by an anionic polymerization, and in particular the hexafluoropropylene oxide polymer composition comprises an anionic initiator, a polar solvent, hexafluoropropylene and hexafluoropropylene oxide. The hexafluoropropylene oxide polymer is prepared under particular reaction conditions by using the composition, hexafluoropropylene oxide poylymer prepared by using the composition according to a preparation process herein has a weight average molecular weight (Mw) of 1,500-4,000 at ?10-20° C.

Abstract: The present invention relates to hexafluoropropylene oxide polymer composition and a process of preparing of hexafluoropropylene oxide polymer by an anionic polymerization, and in particular the hexafluoropropylene oxide polymer composition comprises an anionic initiator, a polar solvent, hexafluoropropylene and hexafluoropropylene oxide. The hexafluoropropylene oxide polymer is prepared under particular reaction conditions by using the composition, hexafluoropropylene oxide polymer prepared by using the composition according to a preparation process herein has a weight average molecular weight (Mw) of 1,500-4,000 at ?10-20° C.

Abstract: Disclosed are a perfluoropolyether-modified silane compound, an antifouling coating composition comprising the same, and a film comprising the same.

Abstract: The present invention relates to hexafluoropropylene oxide polymer composition and a process of preparing of hexafluoropropylene oxide polymer by an anionic polymerization, and in particular the hexafluoropropylene oxide polymer composition comprises an anionic initiator, a polar solvent, hexafluoropropylene and hexafluoropropylene oxide. The hexafluoropropylene oxide polymer is prepared under particular reaction conditions by using the composition, hexafluoropropylene oxide polymer prepared by using the composition according to a preparation process herein has a weight average molecular weight (Mw) of 1,500-4,000 at ?10-20° C.

Abstract: Disclosed are a perfluoropolyether-modified silane compound, an antifouling coating composition comprising the same, and a film comprising the same.

Abstract: A novel polyvinyl alcohol-based polymer membrane is disclosed. The novel polyvinyl alcohol-based polymer membrane of the present invention comprises two different compounds which are crosslinked by irradiating light such as UV or electronic beams or heat treatment to form a covalent bond between double bonds thereby providing improved properties such as chemical resistance and durability. This invention also relates to a process its preparation.

Abstract: The present invention relates to a method for preparing hexafluoropropylene oxide with high yield, and particularly to a method for preparing hexafluoropropylene oxide comprising the step of performing a two-phase interfacial reaction between an organic phase containing hexafluoropropylene and an aqueous phase containing a hypochlorite oxidant in the presence of a phase-transfer catalyst and a non-ionic surfactant to improve the degree of emulsification and dispersion of the organic phase and to increase the contact interfacial area, thereby increasing the efficiency and the yield of the reaction.

Abstract: The present invention relates to a method for preparing hexafluoropropylene oxide with high yield, and particularly to a method for preparing hexafluoropropylene oxide comprising the step of performing a two-phase interfacial reaction between an organic phase containing hexafluoropropylene and an aqueous phase containing a hypochlorite oxidant in the presence of a phase-transfer catalyst and a non-ionic surfactant to improve the degree of emulsification and dispersion of the organic phase and to increase the contact interfacial area, thereby increasing the efficiency and the yield of the reaction.

Abstract: The present invention relates to a fluorine-containing amphoteric polymer for surface coating and preparation method thereof, in particular, to a fluorine-containing amphoteric polymer for surface coating and preparation method thereof in which a hydrocarbon compound with hydrophilic groups serves as a main chain and a macromonomer prepared by copolymerization of an unsaturated hydrocarbon compound and a perfluoro alkyl compound is incorporated into side chains, thereby imparting amphoteric property on the present polymer. Therefore, the present polymer allows self-emulsification and shows soil release, water-repellent and oil-repellent properties with no help of emulsifier, applicable to a variety of industrial fields such as coating, adhesive, fiber, precision chemistry, biological/biochemical industry, electric/electronic, automobile and metal industries.

Abstract: The present invention relates to a process for preparing fluoroacrylic acid ester using a pervaporation composite membrane, in particular, to a process for preparing fluoroacrylic acid ester performed in such a manner that water and unreacted fluoroalcohol generated in esterification between fluoroalcohol and (meth)acrylic acid in the presence of an acid catalyst are condensed and then passed through a pervaporation membrane to effectively remove water, followed by recycling the unreacted fluoroalcohol removed of water. The present process exhibits much higher conversion rate of fluoroacrylic acid ester, allows the decrease of energy consumption and could be performed in environment-friendly manner.

Abstract: The present invention relates to preparation of fluorinated core-shell particles with water and oil repellency, and more particularly, to preparation of emulsion-type coating material with good water and oil repellency using only small amount of expensive fluorinated monomers, which comprise a shell wherein a large amount of hydrophobic fluorinated monomers are included and a core wherein no fluorinated monomers are included.

Abstract: The present invention relates to preparation of fluorinated core-shell particles with water and oil repellency, and more particularly, to preparation of emulsion-type coating material with good water and oil repellency using only small amount of expensive fluorinated monomers, which comprise a shell wherein a large amount of hydrophobic fluorinated monomers are included and a core wherein no fluorinated monomers are included.

Abstract: The present invention relates to a fluorine-containing graft copolymer and its manufacturing method. In particular, the fluorine-containing graft copolymer synthesized by copolymerization of copolymerizable perfluoroalkyl compound as a main chain and macromonomer having copolymerizable vinyl group at one end as branched chains, respectively. Thus the graft copolymer has the remarkable affinity to the substrates designed for the surface modification and superior performance than random copolymers, when it is employed as various types of surface modifiers of fluorine-containing compounds (e.g., water and oil repellent, soil release agents, mold-releasing agents, etc.).