Abstract: Provided are a vulcanizate of a chloroprene rubber composition containing carbon black that generates a smaller amount of heat when used and a method for producing the same by a simpler and more convenient method. First, an unvulcanized rubber composition at least containing a chloroprene polymer and carbon black is vulcanization-molded, to give a semivulcanized molded article having a cure characteristic value, as determined by the method specified in JIS K6300-2: 2001, in the range of t10 to t80. Then, the semivulcanized molded article obtained by semivulcanized film-forming step is additionally vulcanized in the state as it is deformed entirely and the deformation is removed, to give vulcanizate in a desired shape.

Abstract: Provided are a vulcanizate of a chloroprene rubber composition containing carbon black that generates a smaller amount of heat when used and a method for producing the same by a simpler and more convenient method. First, an unvulcanized rubber composition at least containing a chloroprene polymer and carbon black is vulcanization-molded, to give a semivulcanized molded article having a cure characteristic value, as determined by the method specified in JIS K6300-2: 2001, in the range of t10 to t80. Then, the semivulcanized molded article obtained by semivulcanized film-forming step is additionally vulcanized in the state as it is deformed entirely and the deformation is removed, to give vulcanizate in a desired shape.

Abstract: This invention provides a novel polymeric compound having excellent gas permeability, oil resistance, stability, and molding proccessability and a method for producing the same. The novel polymeric compound is a cyclic carbonate-containing polymeric compound represented by formula (I).

Abstract: The present invention provides a method for mass-producing deproteinized natural rubber latex that does not substantially contain allergy-provoking proteins and peptides in a cost-effective manner at industrial levels. This method comprises steps of: adding a urea denaturing agent for proteins and a surfactant to raw natural rubber latex; mixing these substances while transporting the same through a fluid channel to denature proteins in raw natural rubber latex; and separating and removing the denatured proteins.

Abstract: There is disclosed a cross-linked polymer solid electrolyte and a method of manufacturing the same. A crosslinking agent is added to a block-graft copolymer composed of a polymer block chain A represented by formula I and a polymer block chain B represented by formula II; a high energy ray is irradiated to the block-graft polymer in order to crosslink the entire system; and an nonaqueous electrolytic solution is added to the block-graft polymer. There is also disclosed a composite solid electrolyte for use in a solid electrochemical element. The composite solid electrolyte includes an electrically insulating material, an alkali metal salt, a block-graft copolymer composed of a polymer block chain A represented by formula I and a polymer block chain B represented by formula II, and an aprotic organic solvent.

Abstract: There are disclosed a self-crosslinked polymer solid electrolyte, a composite solid electrolyte, and a method of manufacturing the same. A high-energy ray is irradiated to a block-graft copolymer composed of a polymer block chain A represented by formula I and a polymer block chain B represented by formula III in order to crosslink the entire the system. A nonaqueous electrolytic solution is then added to the block-graft polymer to obtain a self-crosslinked polymer solid electrolyte. The self-crosslinked polymer solid electrolyte and an electrically insulating material are combined to obtain a composite solid electrolyte.

Abstract: A polystyrene type monodispersion polymer having at least a monomer unit represented by the following general formula (I), and having a molecular weight which lies in the range 500-500,000 and manufacturing process thereof are disclosed; ##STR1## where R is a hydrogen atom or methyl group, and the R in the molecule may be identical or different.

Abstract: This is a method for separating or purifying an amino acid from a mixture including other substance such as an inorganic salt other than the amino acid and/or a mutual mixture of amino acids including the amino acid by means of piezo-dialysis employing an amphoteric ion exchange membrane. This membrane is made from a ternary block copolymer having a molecular structure of straight chain in which first macro-molecule with a cation exchange group, second macromolecule with an anion exchange group and third macromolecule without ion exchange group are linked together.