Abstract: A process for producing a polyether polymer composition, comprising incorporating an antioxidant insoluble in an organic solvent and/or a stabilizer soluble in the organic solvent, in a slurry containing a polyether polymer and the organic solvent to disperse or dissolve the antioxidant and/or stabilizer; and then, removing the organic solvent. Also provided a polyether polymer composition comprising a polyether polymer particle, and an antioxidant insoluble in an organic solvent incapable of dissolving the polymer particle, and/or a stabilizer soluble in the organic solvent; and satisfying at least one of the following requirements: (1) most of the antioxidant is deposited on the surface of polymer particle; (2) the polymer has a gel content of not larger than 5% by weight; and (3) most of the stabilizer exists within the polymer particle.

Abstract: A material for solid polymer electrolyte, made of a polyether polymer having a moisture content in the range of 400 to 5,000 ppm by weight. A formed solid polymer electrolyte, which is made by mixing the material for solid polymer electrolyte together with an electrolyte salt compound soluble in the polyether polymer, has good ionic conductivity and high mechanical strength. A polyether polymer having a moisture content not larger than 0.04% by weight and a toluene-insoluble content not larger than 5% by weight. This polyether polymer gives a formed solid polymer electrolyte having a smooth surface.

Abstract: A material for solid polymer electrolyte, comprised of a polyether polymer having a moisture content in the range of 400 to 5,000 ppm by weight. A formed solid polymer electrolyte, which is made by mixing the material for solid polymer electrolyte together with an electrolyte salt compound soluble in the polyether polymer, has good ionic conductivity and high mechanical strength. A polyether polymer having a moisture content not larger than 0.04% by weight and a toluene-insoluble content not larger than 5% by weight. This polyether polymer gives a formed solid polymer electrolyte having a smooth surface.

Abstract: A process for producing a polyether polymer composition, comprising incorporating an antioxidant insoluble in an organic solvent and/or a stabilizer soluble in the organic solvent, in a slurry containing a polyether polymer and the organic solvent to disperse or dissolve the antioxidant and/or stabilizer; and then, removing the organic solvent. Also provided a polyether polymer composition comprising a polyether polymer particle, and an antioxidant insoluble in an organic solvent incapable of dissolving the polymer particle, and/or a stabilizer soluble in the organic solvent; and satisfying at least one of the following requirements: (1) most of the antioxidant is deposited on the surface of polymer particle; (2) the polymer has a gel content of not larger than 5% by weight; and (3) most of the stabilizer exists within the polymer particle.

Abstract: There are provided a cathode film for batteries which is easy to handle in the form of a film and has excellent mechanical strength and an excellent ion conductivity; a solid electrolyte composition suitable for producing such a cathode film; and a process for efficiently producing such a cathode film. The solid electrolyte composition for cathode which is composed of a polyether polymer, an active material of positive electrode, conductive particles, an electrolyte salt compound and a photopolymerization initiator wherein the photopolymerization initiator is present in an amount of 2 to 30 parts by weight per 100 parts by weight of the polyether polymer, is molded and then crosslinked by irradiation of an ultraviolet light, whereby a cathode film for batteries is obtained. By using this cathode film, a battery with excellent cycle performance can be obtained.

Abstract: A composition for solid polymer electrolyte which comprises a polyether polymer and an electrolyte salt compound soluble in the polyether polymer; wherein said polyether polymer is either (1) a polyether polymer having a toluene insoluble content of not larger than 5 weight %, or (2) a polyether polymer having a Mooney viscosity of 3 to 190, which has been prepared by applying a shearing force under heated conditions using an extruder to a polyether polymer having a Mooney viscosity of 10 to 200 so that the Mooney viscosity is reduced by 5 or more. This composition exhibits good film-forming property, and gives a solid polymer electrolyte exhibiting good and uniform ionic conductivity, and having high mechanical strength and surface smoothness. The solid polymer electrolyte is suitable for batteries and capacitors, especially for a lithium ion secondary battery.

Abstract: A process for producing a polyether polymer by polymerizing a monomer having an oxirane group in the presence of a Lewis base having no active hydrogen such as, for example, a nitrile compound, a cyclic ether compound or an ester compound; and a polyether polymer produced by this process. Thus, a polyether polymer having a minimized amount of undesirable crosslinked product can be produced without reduction of polymerization activity.

Abstract: A composition for solid polymer electrolyte which comprises a polyether polymer and an electrolyte salt compound soluble in the polyether polymer; wherein said polyether polymer is either (1) a polyether polymer having a toluene insoluble content of not larger than 5 weight %, or (2) a polyether polymer having a Mooney viscosity of 3 to 190, which has been prepared by applying a shearing force under heated conditions using an extruder to a polyether polymer having a Mooney viscosity of 10 to 200 so that the Mooney viscosity is reduced by 5 or more. This composition exhibits good film-forming property, and gives a solid polymer electrolyte exhibiting good and uniform ionic conductivity, and having high mechanical strength and surface smoothness. The solid polymer electrolyte is suitable for batteries and capacitors, especially for a lithium ion secondary battery.

Abstract: An impact-resistant styrenic polymer resin composition comprising 70-97 wt. % of a styrenic polymer resin and 3-30 wt. % of a toughening agent of a fine particle form having an average particle diameter of 0.3-0.7 .mu.m and dispersed in the styrenic polymer resin. The toughening agent comprises (I) 10-98 wt. % of a styrene/butadiene di-block copolymer having (i) a weight average molecular weight (MW) of 30,000-1,000,000, (ii) a MW distribution of 1.00-1.20 as defined by the weight average MW/number average MW ratio, (iii) a total bound styrene content of 30-70 wt. %, and (iv) a block styrene content of at least 60% based on the total bound styrene content; and (II) 2-90 wt. % of a styrene/butadiene copolymer rubber, polybutadiene or a mixture thereof, which has (i) a weight average MW of 1,000-1,000,000, (ii) a MW distribution of 1.00-1.60 as defined by the weight average MW/number average MW ratio, (iii) a total bound styrene content of 0-15 wt. %, and (iv) a cis-1,4 bond content of 10-80 wt.

Abstract: A shape-memorizing block copolymer composition characterized by comprising a block copolymer component (I) composed of (A) at least two polymer segments (polymer segments A) having a glass transition temperature of 60.degree. C. to 250.degree. C. and (B) at least one amorphous polymer segment (polymer segment B) having a glass transition temperature which is not lower than -20.degree. C. but lower than the lowest glass transition temperature within those of said polymer segments A with a difference not less than 20.degree. C., the proportion of whole of said polymer segments A to whole of said polymer segment B being in the range of (10/90) to (70/30) by weight; and a rubbery polymer component (II) having a glass transition temperature lower than -20.degree. C., the proportion of said component (I) to said component (II) being in the range of (50/50) to (98/2) by weight.

Abstract: A process for preparing a styrene resin composition which comprises subjecting to bulk or bulk-suspension polymerization a solution obtained by dissolving (A) a modified styrene polymer obtained by introducing directly or through another atomic group at least one functional group represented by the general formula>C.dbd.N.sup.+ <into the polymer chain of a styrene polymer obtained by polymerizing 90 to 100% by weight of a styrene monomer with 0 to 10% by weight if a monomer copolymerizable with the styrene monomer, if desired together with (B) a rubber-like polymer in (C) a styrene monomer.

Abstract: A styrene resin composition comprising [I] a polymer component which is a mixture of (A) 1 to 50% by weight of a resinous styrene polymer in which a functional group represented by formula>C.dbd.N.sup.+ <is bound to a polymer chain either directly or via the other atomic group and (B) 99 to 50% by weight of the other styrene resin than the above, and [II] a particulate or granular additive [II].