Abstract: The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the present disclosure is used for cement formulation, it may improve fluidity of the composition even in a high water reducing ratio range of the particle and effectively prevent slump loss of the cement formulation, while improving initial dispersibility due to excellent water reducing performance.

Abstract: The present disclosure relates to a preparation method for an acrylic acid-based polymer. According to the preparation method for an acrylic acid-based polymer of the present disclosure, unreacted monomers may be reduced and a high quality acrylic acid-based polymer can be prepared. In addition, it is not necessary to increase the time or the temperature in the polymerization step or the aging step, thereby maintaining the high productivity.

Abstract: The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the present disclosure is used for cement formulation, it may improve fluidity of the composition even in a high water reducing ratio range of the particle and effectively prevent slump loss of the cement formulation, while improving initial dispersibility due to excellent water reducing performance.

Abstract: The present disclosure relates to a preparation method for an acrylic acid-based polymer. According to the preparation method for an acrylic acid-based polymer of the present disclosure, unreacted monomers may be reduced and a high quality acrylic acid-based polymer can be prepared. In addition, it is not necessary to increase the time or the temperature in the polymerization step or the aging step, thereby maintaining the high productivity.

Abstract: The present invention relates to a technique for capturing carbon dioxide and converting the carbon dioxide to carbonate minerals using a recombinant whole cell biocatalyst expressing carbonic anhydrase. More particularly, the present invention relates to a composition for capturing carbon dioxide and a method for capturing carbon dioxide using the composition, which composition comprises a whole cell of a transformant formed with a vector including a nucleic acid encoding a recombinant carbonic anhydrase; a cell lysate or its fraction of the whole cell; or a recombinant carbonic anhydrase isolated from the whole cell. Further, the present invention relates to a composition and method for converting the carbon dioxide to carbonate minerals using the carbon dioxide capturing composition.

Abstract: The present invention relates to a technique for capturing carbon dioxide and converting the carbon dioxide to carbonate minerals using a recombinant whole cell biocatalyst expressing carbonic anhydrase. More particularly, the present invention relates to a composition for capturing carbon dioxide and a method for capturing carbon dioxide using the composition, which composition comprises a whole cell of a transformant formed with a vector including a nucleic acid encoding a recombinant carbonic anhydrase; a cell lysate or its fraction of the whole cell; or a recombinant carbonic anhydrase isolated from the whole cell. Further, the present invention relates to a composition and method for converting the carbon dioxide to carbonate minerals using the carbon dioxide capturing composition.