Abstract: To provide a method for surface modification of a fluororesin, that enables graft polymerization at a lower temperature than a conventional method. A method for surface modification of a fluororesin, which comprises reacting a fluororesin with a radical reactive compound in the presence of an organometallic compound.

Abstract: There is provided a display device which makes it possible to reduce a variation in a contact area between a base member and an installation surface, and enhance the stability. The display device includes a main body section and a stand supporting the main body section on an installation surface. The stand includes a base section including a plate-shaped base member which is in contact with the installation surface at a front side thereof and is inclined in a front-back direction with respect to the installation surface, and a connecting section connecting the base section and the main body section.

Abstract: There is provided a display device which makes it possible to reduce a variation in a contact area between a base member and an installation surface, and enhance the stability. The display device includes a main body section and a stand supporting the main body section on an installation surface. The stand includes a base section including a plate-shaped base member which is in contact with the installation surface at a front side thereof and is inclined in a front-back direction with respect to the installation surface, and a connecting section connecting the base section and the main body section.

Abstract: A process is disclosed for the continuous production of an ABS resin. The polymerization step comprises at least two substeps, one being a first-stage substep of forming particles of the rubbery polymer and the other a second-stage substep of adjusting the particle sizes of the particles. The first-stage substep is conducted in a polymerization system making use of a plug flow reactor or a batch polymerization reactor, and conducts polymerization at least until the particles are formed in the polymerization mixture. The second-stage substep increases a converted amount of the monomer component into the polymer compared with that in the particle forming substep and makes the particles smaller. A polycarbonate-ABS resin composition is also disclosed.

Abstract: A styrene resin is disclosed having excellent moldability and physical properties and is suited for recycling; and a thermoplastic polycarbonate composition with the styrene resin. The styrene resin contains 50 to 90 wt. % of a continuous phase component (S) composed of a copolymer of a styrene monomer, an unsaturated nitrile monomer; and 10 to 50 wt. % of a dispersed phase component on which said monomers have been grafted and which has occluded said copolymer. In the styrene resin, no triple chain unit AAA is detected from the unsaturated nitrite monomer component (A) in the continuous phase component (S) and a double chain unit AA amounts to 3% or less based on the whole units (A) detected.

Abstract: A method for removing volatile materials, comprises adding a blowing aid to a polymer composition containing volatile materials, mixing them in a static mixing apparatus, and extruding the resultant mixture by an extruding apparatus into a devolatilizing tank, thereby the mixture is made to be blown, to cause removal of the volatile materials. First, the blowing aid (6) is discharged with an addition nozzle apparatus (2), in a direction opposite to the direction of the flow of the polymer composition (1), to be added, and the polymer composition is introduced into the static mixing apparatus (3), at a pressure at which the blowing does not take place, thereby mixing them. Then, using the extruding apparatus (11), the resultant mixture is extruded into the devolatilizing tank (4), so that the polymer is made into a blown product at such a temperature and a pressure that the blowing coefficient B is 1.4 or more, thereby causing the removal of volatile materials.

Abstract: The present invention is directed to a method for polymerizing an .alpha.-olefin characterized by using a catalyst system which is obtained by reacting a halogenated metallocene compound with an organometallic compound, and then bringing the resultant reaction product into contact with a compound which will be a stable anion by reaction with the reaction product of the halogenated metallocene compound and the organometallic compound.When the method of the present invention is carried out, a polyolefin can be obtained by the use of the inexpensive catalyst in a high activity per unit amount of the catalyst.

Abstract: A strongly basic anion exchange resin of gel type having trimethylamine type quaternary ammonium groups and a cross-linked three dimensional polymer structure formed by copolymerization of a monovinyl aromatic monomer with a cross-linkable aromatic monomer, wherein the water content X (wt %) of the resin with counter ions being a standard type (chlorine type) and the salt-splitting capacity Y (meq/g-Resin) are in a relation represented by the following formula (1) or (2):Y.gtoreq.0.0214X+3.26 (1)provided 50<X.ltoreq.75Y.gtoreq.0.0722X+0.711 (2)provided 40.ltoreq.X.ltoreq.50.

Abstract: An insulating composition comprising a syndiotactic polypropylene (s-PP) having a syndiotactic pentad ratio of not less than 0.7 and an MFR of 0.05-2.0 g/10 min. The composition of the present invention comprising a specific s-PP can provide an article having superior electric properties and mechanical properties. In particular, the article can retain superior electric properties and mechanical properties even after rapid cooling or gradual cooling for re-processing of said article. Accordingly, the composition of the present invention can be suitable used for insulating layer, coating layer of various power cables inclusive of high voltage wires and low voltage wires, coating layer of optical fibers and insulator of wire-connecting structures.

Abstract: The invention provides a polymeric insulating material having a high dielectric breakdown voltage. The material comprises polypropylene which has been obtained in a yield of at least 300,000 g/g-Ti based on titanium in a catalyst upon polymerization, contains ash in an amount not greater than 40 ppm by weight when analyzed by completely burning the polypropylene in air, said ash containing titanium in an amount not greater than 1 ppm by weight based on the weight of the polypropylene, and also contains chlorine in an amount not greater than 2 ppm by weight and boiling n-heptane soluble matter in an amount not smaller than 1 wt. % but not greater than 10 wt. %. To further improve the dielectric breakdown voltage an inorganic oxide or hydroxide free of particles of 10 .mu.m and greater in diameter and having an average particle size not greater than 1 .mu.

Abstract: The invention provides a polymeric insulating material having a high dielectric breakdown voltage. The material comprises polypropylene which has been obtained in a yield of at least 300,000 g/g-Ti based on titanium in a catalyst upon polymerization, contains ash in an amount not greater than 40 ppm by weight when analyzed by completely burning the polypropylene in air, said ash containing titanium in an amount not greater than 1 ppm by weight based on the weight of the polypropylene, and also contains chlorine in an amount not greater than 2 ppm by weight and boiling n-heptane soluble matter in an amount not smaller than 1 wt. % but not greater than 10 wt. %. According to the invention, it is possible to further improve the dielectric breakdown voltage by adding to the polypropylene an inorganic oxide or hydroxide free of particles of 10 .mu.m and greater in diameter and having an average particle size not greater than 1 .mu.

Abstract: A method for preparing a propylene (co)polymer having a substantially high syndiotactic structure and a desired molecular weight which comprises the step of (co)polymerizing propylene or propylene and a small amount of another olefin by the use of a transition metal compound catalyst having asymmetric ligands in the presence of a specific internal olefin.

Abstract: A substantially syndiotactic propylene copolymer which comprises propylene and at least one cyclic diolefin having 6 to 25 carbon atoms or an alkadiene having 6 to 25 carbon atoms and at least one terminal double bond, in the .sup.13 C-NMR spectrum of the copolymer measured in a 1,2,4-trichlorobenzene solution, a peak intensity observed at about 20.2 ppm as the reference of tetramethylsilane at 0.0 ppm being 0.5 or more of the total peak intensity attributed to methyl groups of propylene; the content of the cyclic diolefin or the alkadiene being from 0.01 to 20 mol %; the intrinsic viscosity [.eta.] of the copolymer measured in a tetralin solution at 135.degree. C. being from 0.1 to 10 dl/g.This copolymer can contain an .alpha.-olefin other than propylene, particularly ethylene.

Abstract: An improved method for preparing block copolymers of propylene which comprises providing a polymerizer composed of at least two reaction vessels connected to one another, substantially homopolymerizing propylene in a first step and then copolymerizing ethylene and propylene in a second step in the presence of a stereoregular catalyst, characterized by carrying out the homopolymerization of propylene in the polymerizer composed of at least two reaction vessels connected to one another in series, then introducing the resulting polymer slurry into a countercurrent washing column and countercurrently washing the slurry with propylene, introducing the washed slurry withdrawn from the lower part of the washing column into a reaction vessel in the second step connected to the washing column and performing the polymerization of ethylene and propylene, of which ratio ranges from 15/85 to 95/5. According to this method, a block copolymer of propylene exhibiting excellent physical properties can be obtained efficiently.

Abstract: Radiation detecting solid elements consisting of conductive polymers and radiation sensitive materials which are capable of generating radiation induced substances composing the dopant of the conductive polymers. The elements are monolayer sheets obtained by impregnating or compounding the conductive polymers, such as, polythiophene and polyselenophene, with radiation sensitive materials, such as, diphenyliodonium chloride and triphenylsulfonium hexafluoroarsenate(V). The elements are also laminated sheets consisting of conductive polymer films and radiation sensitive material containing films. As radiation exposure causes variation in electrical conductivity and absorption spectrum of the elements, radiation can be detected by the variation of these properties.

Abstract: A process for the purification of riboflavine-5'-monophosphate comprising subjecting crude riboflavine-5'-monophosphate to chromatography using a column packed with a weakly basic anion-exchange resin having a skeleton of a crosslinked polyacrylic acid ester or polymethacrylic acid ester in which at least a part of the ester linkages thereof are converted into amide linkages represented by the following formula (1): ##STR1## to obtain a fraction of riboflavine-5'-monophosphate containing a reduced amount of impurities from an eluate of the column is disclosed.