Abstract: A diverting agent which has performance to release filling due to biodegradability, can be quickly removed after a certain period of time, and has an excellent filling property with respect to a fracture in a well is provided. The diverting agent contains particles having a particle diameter of 1,700 ?m or more in an amount of 10 to 70 mass %, particles having a particle diameter of 500 ?m or more and less than 1,700 ?m in an amount of 20 to 80 mass %, and particles having a particle diameter of less than 250 ?m in an amount of 5 to 40 mass %, and the diverting agent contains a biodegradable resin in an amount of 10 mass % or more.

Abstract: A diverting agent is provided which has solubility in water that can be controlled excellently and which does not easily dissolve at an early stage of filling of fractures in a well in excavation method using a hydraulic fracturing method and dissolves in water and can be easily removed after filling is no longer needed. The diverting agent contains powdery polyvinyl alcohol-based resins having an average particle diameter of 800 to 2000 ?m.

Abstract: A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C.

Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.

Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.

Abstract: An object of the present invention is to provide a pharmaceutical tablet having high tensile strength and excellent in immediate disintegrability. The pharmaceutical tablet of the present invention is obtained by a direct compression method, and contains an active ingredient, a polyvinyl alcohol resin, and a plasticizer other than water, wherein a content of the plasticizer is 1 to 8 parts by weight with respect to 100 parts by weight of the polyvinyl alcohol resin.

Abstract: The diverting agent of the present invention contains resin particles of polyvinyl alcohol-based resin. The resin particles of polyvinyl alcohol-based resin are a particle mixture containing two or more types of resin particles having different particle diameters, and the diverting agent contains resin particles A of polyvinyl alcohol-based resin having a particle diameter of 1,700 ?m or more in a range of 5 mass % to 95 mass % and resin particles B of polyvinyl alcohol-based resin having a particle diameter of 250 ?m to 1,000 ?m in a range of 5 mass % to 95 mass %.

Abstract: An object of the present invention is to provide a diverting agent which has performance to release filling due to biodegradability, can be quickly removed after a certain period of time, and has an excellent filling property with respect to a fracture in a well. The diverting agent according to the present invention contains particles having a particle diameter of 1,700 ?m or more in an amount of 10 to 70 mass %, particles having a particle diameter of 500 ?m or more and less than 1,700 ?m in an amount of 20 to 80 mass %, and particles having a particle diameter of less than 250 ?m in an amount of 5 to 40 mass %, and the diverting agent contains a biodegradable resin in an amount of 10 mass % or more.

Abstract: An object of the present invention is to provide a diverting agent which does not completely dissolve in water and seawater in an ultra-low temperature to low temperature range (5° C. to 30° C.) for a certain period of time (about 5 minutes to 3 hours), and is quickly dissolved and removed after a certain period of time in an excavation method using a hydraulic fracturing method. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin having 2.3 mol % to 15 mol % of a hydrophilic modifying group in a molecular structure thereof.

Abstract: An object of the invention is to provide a diverting agent which has solubility in water that can be controlled excellently and which does not easily dissolve at an early stage of filling of fractures in a well in excavation method using a hydraulic fracturing method and dissolves in water and can be easily removed after filling is no longer needed. The diverting agent of the invention contains powdery polyvinyl alcohol-based resins having an average particle diameter of 800 to 2000 ?m.

Abstract: A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C.

Abstract: An object of the present invention is to provide a diverting agent that can exhibit sufficient filling properties against a fracture in a well in an excavation method using a hydraulic fracturing method, and that is excellent in solubility after a predetermined period of time has passed. The diverting agent of the present invention contains a polyvinyl alcohol-based resin having an average polymerization degree of 1000 or more.

Abstract: An object of the present invention is to provide a diverting agent that exhibits sufficient filling properties against a fracture in a well because of swelling without completely dissolution for a certain period of time (about 30 minutes to 5 hours), and that quickly dissolves and be removed even at a low temperature of 40° C. to 60° C. after a certain period of time has passed. The present invention relates to a diverting agent containing a modified polyvinyl alcohol-based resin.

Abstract: An object of the present invention is to provide a diverting agent that does not completely dissolve for a certain period of time (about 5 minutes to 3 hours) and has high cohesiveness between particles. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin having a degree of saponification of 65 mol % to 95 mol %.

Abstract: The diverting agent of the present invention contains resin particles of polyvinyl alcohol-based resin. The resin particles of polyvinyl alcohol-based resin are a particle mixture containing two or more types of resin particles having different particle diameters, and the diverting agent contains resin particles A of polyvinyl alcohol-based resin having a particle diameter of 1,700 ?m or more in a range of 5 mass % to 95 mass % and resin particles B of polyvinyl alcohol-based resin having a particle diameter of 250 ?m to 1,000 ?m in a range of 5 mass % to 95 mass %.

Abstract: An object of the present invention is to provide a pharmaceutical tablet having high tensile strength and excellent in immediate disintegrability. The pharmaceutical tablet of the present invention is obtained by a direct compression method, and contains an active ingredient, a polyvinyl alcohol resin, and a plasticizer other than water, wherein a content of the plasticizer is 1 to 8 parts by weight with respect to 100 parts by weight of the polyvinyl alcohol resin.

Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.

Abstract: Provided is a liquid spray agent for agricultural use, including a polyvinyl alcohol-based resin having a saponification degree of from 30 mol %, to 60 mol %. With this, a liquid spray agent for agricultural use, which is used in agricultural and horticultural fields and has high fixation ability and excellent sprayability, can be provided.

Abstract: A cement admixture includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50% or less.

Abstract: A liquid spray agent for plants includes: a polyvinyl alcohol resin (A) having a saponification degree of from 30 mol % to 60 mol %; and an anionic surfactant (B). The liquid spray agent for plants has enhanced spreading property and stability as a spray agent.