Abstract: A xanthogen compound dispersion is formed by dispersing a xanthogen compound in water or alcohol, wherein a volume average particle size of the xanthogen compound is 0.001 to 9 ?m.

Abstract: A latex of a styrene-based block copolymer includes a styrene-based block copolymer and water. The styrene-based block copolymer includes a toluene insoluble content of 30 to 95 wt %. The latex of the styrene-based block copolymer is superior in the processability and can provide a molded film such as a dip-molded product having the high tear strength, the high stress retention and the soft texture.

Abstract: A method for producing a molded article including a washing step of washing a molded article with hot water at 40 to 100° C., the molded article being prepared from a latex composition containing a conjugated diene polymer latex and a xanthogen compound.

Abstract: A latex composition contains a carboxy-modified conjugated diene polymer latex, a xanthogen compound, and a metal oxide.

Abstract: A latex composition containing a carboxy-modified polymer latex, a xanthogen compound, and a typical metal compound in a form other than an oxide. This latex composition has excellent stability, can avoid delayed (Type IV) allergic reactions in addition to immediate (Type I) allergic reactions, and can provide a molded film, such as a dip-molded product, having excellent tear strength and tensile strength. Also a molded film and a substrate with an adhesive layer which are obtained using the latex composition.

Abstract: A latex composition includes a conjugated diene polymer latex and a silicone-based surfactant having a silicon atom content of 1.5 to 10 wt %. A dip-molded article is formed by dip molding the latex composition.

Abstract: A molded film having a thickness of 20 to 300 ?m and obtained using a latex composition including a conjugated diene polymer latex, a sulfur-based vulcanizing agent, a vulcanization accelerator, and an antioxidant, wherein the antioxidant is at least one selected from phenolic antioxidants and quinoline antioxidants, and has a molecular weight of 300 to 600.

Abstract: A method for producing a latex composition, the method comprising a provision step of providing a conjugated diene polymer latex; and a preparation step of adding a sulfur-based vulcanizing agent, a xanthogen compound, and a strong acid salt-based surfactant to the conjugated diene polymer latex to prepare a latex composition.

Abstract: A latex composition includes a sulfur-based vulcanizing agent and a xanthogen compound mixed with a conjugated diene polymer latex, the aqueous dispersion of a sulfur-based vulcanizing agent being a dispersion in which the sulfur-based vulcanizing agent is dispersed in water using an anionic surfactant.

Abstract: A method for producing a dip-molded article, the method including steps of immersing a mold for dip molding in a coagulant solution to deposit the coagulant on the mold for dip molding; providing a latex composition containing a carboxy-modified conjugated diene polymer latex which is a dispersion of carboxy-modified conjugated diene polymer particles having a volume average particle size of 500 to 2,000 nm in water; and immersing the mold for dip molding having the coagulant deposited thereon in the latex composition to obtain a dip-molded article having a thickness of 0.02 to 0.19 mm.

Abstract: A method for producing a latex composition, the method comprising a provision step of providing a conjugated diene polymer latex; a preparation step of adding a sulfur-based vulcanizing agent and a xanthogen compound to the conjugated diene polymer latex to prepare a latex composition before aging; and an aging step of, after the preparation of the latex composition before aging, aging the prepared latex composition before aging through storing of the latex composition at a temperature of 5 to 60° C. for 12 hours to 14 days, wherein the pH of the latex composition after 12 hours from the start of aging in the aging step is controlled to 9 or more.

Abstract: A latex of an acid-modified conjugated diene polymer including the acid-modified conjugated diene polymer obtained by modifying a conjugated diene polymer with an acid group-containing compound, in which a content of a structural unit derived from the acid group-containing compound is 0.2 to 0.7 parts by weight with respect to 100 parts by weight of the acid-modified conjugated diene polymer; a content of a water-soluble polymer in the latex is 2 parts by weight or less with respect to 100 parts by weight of the acid-modified conjugated diene polymer; when a solids content of the latex is adjusted to 60 wt %, a viscosity at 25° C. is 800 mPa·s or less; and when the solids content of the latex is adjusted to 50 wt %, the viscosity at 25° C. is 300 mPa·s or less.

Abstract: A method for producing a synthetic rubber, the method including: an emulsification step of continuously feeding a solution or a dispersion of a synthetic rubber obtained by dissolving or dispersing the synthetic rubber in an organic solvent and an aqueous solution of an emulsifier to a mixer and mixing to continuously obtain an emulsion; a first removal step of removing the organic solvent from the emulsion continuously obtained in the emulsification step in a container while the emulsion is continuously transferred to the container regulated to a pressure condition of 700 to 760 mmHg; and a second removal step of removing the organic solvent from the emulsion that has undergone the first removal step under a pressure of less than 700 mmHg.

Abstract: A latex of a styrene-based block copolymer includes a styrene-based block copolymer and water. The styrene-based block copolymer includes a toluene insoluble content of 30 to 95 wt %. The latex of the styrene-based block copolymer is superior in the processability and can provide a molded film such as a dip-molded product having the high tear strength, the high stress retention and the soft texture.

Abstract: A method for producing a polymer latex includes: a preparation step of reducing the weight average molecular weight of a conjugated diene polymer (A) by 20 to 70 mass %, thereby obtaining an organic solvent solution containing a conjugated diene polymer (B) having a weight average molecular weight lower than that of the conjugated diene polymer (A); and an emulsification step of emulsifying the organic solvent solution in water in the presence of a surfactant, thereby obtaining a polymer latex.

Abstract: A method for producing a polymer latex, includes a step of emulsifying a polymer solution of a synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer, in water in the presence of a rosin and/or a rosin metal salt, thereby obtaining an emulsified liquid, wherein the rosin and/or the rosin metal salt to be used have/has a total content rate of abietic acid, neoabietic acid and palustric acid, and salts thereof, of 5% by weight or less.

Abstract: A xanthogen compound dispersion is formed by dispersing a xanthogen compound in water or alcohol, wherein a volume average particle size of the xanthogen compound is 0.001 to 9 ?m.

Abstract: A latex composition containing a conjugated diene polymer latex and a medium-chain fatty acid glyceride, wherein a content proportion of the medium-chain fatty acid glyceride is 1 to 40 parts by weight with respect to 100 parts by weight of the conjugated diene polymer. In the present invention, a medium-chain fatty acid forming the medium-chain fatty acid glyceride is preferably a fatty acid having 6 to 18 carbon atoms. In the present invention, the medium-chain fatty acid glyceride is preferably a medium-chain fatty acid triglyceride. The latex composition preferably further contains a crosslinking agent.

Abstract: A latex composition is formed by adding an aqueous solution of an aluminum compound to a latex of a carboxyl group-containing synthetic polyisoprene and/or a carboxyl group-containing styrene-isoprene-styrene block copolymer. In the latex composition, the aqueous solution of an aluminum compound preferably has a pH of 5 to 13. In the latex composition, the aqueous solution of an aluminum compound is preferably an aqueous solution of a metal salt of aluminate.

Abstract: A method for producing a synthetic polyisoprene latex, including a step of mixing a latex of synthetic polyisoprene (A) synthesized by use of a Ziegler type catalyst and a latex of synthetic polyisoprene (B) synthesized by use of an organic alkali metal catalyst at a weight ratio of “synthetic polyisoprene (A): synthetic polyisoprene (B)=10:90 to 90:10”. In the method, preferably, the weight average molecular weight of the synthetic polyisoprene (A) is 100,000 to 3,000,000 and the weight average molecular weight of the synthetic polyisoprene (B) is 1,000,000 to 5,000,000.