Abstract: A method for producing a sodium hypochlorite pentahydrate crystal powder includes drying wet sodium hypochlorite pentahydrate crystals with a gas until the moisture content of the crystals reaches 2.5% by weight or lower. The gas may have a temperature of less than 25° C., a dew point of ?2° C. or lower, and a carbon dioxide concentration of 250 ppm to 1600 ppm. The wet sodium hypochlorite pentahydrate crystals may have a sodium hydroxide concentration of 0.01% by weight or higher.

Abstract: The present invention relates to a process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, which generates only a few scales and shows excellent polymerization stability. The present invention is achieved by the process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, wherein the vinyl chloride type monomer and the macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain are dispersed and mixed at a temperature from 20° C. to 60° C. for at least 1 minute, and then copolymerization reaction thereof is initiated.

Abstract: Provided are a vinyl chloride resin composition having good melt flowability without lowering the softening temperature and the mechanical strength properties of the molded articles thereof even when various compounding ingredients are not added thereto in a large amount, and a molded article obtained by the composition. The present invention is attained by a vinyl chloride resin composition prepared by adding a vinyl chloride copolymer resin obtained by copolymerizing a vinyl monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, to a vinyl chloride resin.

Abstract: A novel polyvinyl chloride copolymer paste resin comprising a copolymer of a vinyl chloride monomer and a macromonomer of the present invention can be synthesized with high productivity, and can provides a plastisol having high gelation properties, storage stability, superior tensile properties in low-temperature working conditions and heat resistance.

Abstract: The present invention relates to a process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, which generates only a few scales and shows excellent polymerization stability. The present invention is achieved by the process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, wherein the vinyl chloride type monomer and the macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain are dispersed and mixed at a temperature from 20° C. to 60° C. for at least 1 minute, and then copolymerization reaction thereof is initiated.

Abstract: The present invention is to provide a novel soft vinyl chloride resin which can has suitable hardness or flexibility in accordance with its various applications, and which has polymerization stability equivalent to that of vinyl chloride and has good transparency and heat resistance. The present invention is attained by a soft vinyl chloride copolymer resin obtained by copolymerizing (A) a vinyl chloride type monomer and (B) a macromonomer having a polymer comprising an ethylenically unsaturated monomer containing a double bond in a main chain, wherein the ratio of (A)/(B) by weight is 50/50 to 80/20.

Abstract: A novel polyvinyl chloride copolymer paste resin comprising a copolymer of a vinyl chloride monomer and a macromonomer of the present invention can be synthesized with high productivity, and can provides a plastisol having high gelation properties, storage stability, superior tensile properties in low-temperature working conditions and heat resistance.