Abstract: An apparatus for making a hollow extrusion die set consisting of male and female die member with their respective shaped male and female bearing surfaces spaced apart and in a predetermined mating relationship from solid male and hollow female die blanks (6,11), respectively, is provided comprising: a wire-cut EDM electrode head assembly (1) having a plurality of wire guide members (1c, 1d) for spanning and axially transporting a continuous wire electrode (3) in a fixed U form path including a predetermined stretch (3a) of the axially transported wire electrode (3) constituting an axially moving EDM wire-cutting edge for the male and female die blanks (6, 11); a first jig member (5) for securely and interchangeably mounting the male and female die blanks (6, 11) in a predetermined and fixed relative position thereon; a worktable (4) for securely mounting the first jig member (5) thereon and being displaceable relative to the wire-cut EDM electrode head assembly (1); and a second jig member (7) for securely mo

Abstract: A traveling-wire electro-erosion machine which has a head assembly comprising a tubular support formed with a plurality of roller guides positioned to define a path for a traveling wire forming an electrode for electroerosion. Above the tubular support, there is provided a boxlike housing with a supply wheel and a takeup wheel for the wire and a bevel gear on the tubular support cooperates with a pinion on a motor which enables rotation of the entire assembly. A worm-gear arrangement may be used instead of the bevel gears and a different construction of the guide rollers may be provided as well, e.g. on the downwardly extending projection from the tubular body.

Abstract: An anionic polymerization is carried out by polymerizing a monomer for anionic polymerization in a solvent in the presence of a polymerization initiator after preparing a polymerization system by an operation (I) adding a solution of an organometallic compound in a polymerization system of a solvent or a combination of a solvent and an inert gas and an operation (II) removing excess of the unreacted organometallic compound, before charging the monomer and the polymerization initiator.

Abstract: A carrier for liquid chromatography having main units ##STR1## wherein n=0 or an integer of 1 to 3; m=0 or 1; q=an integer of 1 to 3; p=0 or 1; w=90 to 16; x=57 to 2; y=0 to 30; z=5 to 30; B represents adenine, guanine, thymine, uracil or cytosine; X' represents OH Cl, Br or I; and CM represents styrene, a substituted styrene, acrylonitrile, a substituted acrylonitril, acrylic acid or a substituted acrylic acid and CCM represents crosslinking agent having two or more unsaturated group such as ethylene glycol diacrylate, divinylbenzene etc.

Abstract: A cation-exchange membrane is prepared by swelling a fluorinated polymer membrane having cation-exchangeable groups with an organic solvent and then removing the solvent from the swollen membrane and immersing a monomer with or without a crosslinking agent and a polymerization initiator into it and polymerizing the monomer. The membrane is preferably swollen with a water miscible organic solvent and then, the solvent is removed from the membrane.

Abstract: A powdery rubber is produced by mixing an anionic or nonionic rubber latex with an aqueous solution of an anionic water soluble macro-molecular compound which is dissociated in water to give negative charge; adjusting the pH to an acidic condition; adding to the aqueous solution either a cationic polymer which is water soluble in an acidic condition or a cationic surfactant which causes a coacervation with the anionic water soluble macromolecular compound in an acidic condition to separate the rubber particles from the rubber latex under coacervation and adding an emulsion of a synthetic resin having a glass transition temperature higher than 30.degree. C. to the rubber particles at a ratio of 1 to 50 wt.% (as a solid content) to the solid content of the rubber latex and dehydrating and drying the resulting powdery rubber.

Abstract: A cation exchange membrane is produced by impregnating a diene derivative having carboxylic acid group and/or carboxylic acid convertible group into a cation exchange membrane of a fluorinated polymer having at least one type cation exchange groups having lower acidity than that of sulfonic acid group wherein a ratio of sulfonic acid groups to total cation exchange groups on one surface (A surface layer) is higher than that of the other surface (B surface layer); performing a partial polymerization of the diene derivative and dipping the resulting membrane into an organic solvent which is miscible with water and has a boiling point of higher than 30.degree. C. at 760 mmHg; holding the membrane between a pair of smooth plates; and heating the membrane at 50.degree. to 180.degree. C.; and if the diene derivative having carboxylic acid convertible group is used, converting said groups into carboxylic acid groups.

Abstract: An electrolysis of sodium chloride is carried out by using a cation exchange membrane obtained by the following treatment.The cation exchange membrane is prepared by treating one surface of a membrane of a perfluorocarbon polymer having sulfonyl halide groups with a diamine or a polyamine at a temperature of 170.degree. C. to a deterioration temperature of the membrane and immersing a diene derivative having a carboxyl group or a group which can be converted to carboxyl group into the membrane to polymerize the diene derivative and treating the membrane with a water miscible organic solvent having a boiling point of higher than 120.degree. C. in 760 mmHg between smooth plates at 80.degree. C. to 180.degree. C.

Abstract: A homogeneous cation-exchange membrane made of one or more fluorinated polymer having cation-exchangeable groups is swollen with a water miscible organic solvent and then the solvent is removed from the swollen membrane and then membrane is treated with hydrochloric acid.The cation-exchange membrane of the fluorinated polymer having cation-exchangeable groups is modified to reduce the permeability of hydroxyl group ions by swelling it and removing the water-miscible organic solvent and then, treating it with hydrochloric acid.

Abstract: A cation exchange membrane is produced by treating a membrane of a fluorinated polymer having sulfonyl halide group on side chains with a mixture of 1 a reaction product of an amine with a halogenated monomer and 2 a vinyl monomer and/or diene monomer each of which has carboxylic acid group, phenolic hydroxyl group, sulfonic acid group and/or a functional group being convertible into carboxylic acid group, phenolic hydroxyl group or sulfonic acid group.

Abstract: A tool electrode for the electrical machining of a workpiece is displaced in various directions by the selective energization of a plurality of electromagnets on a first member. The pole pieces of the electromagnet on this member are juxtaposed with a conical surface of another, magnetically susceptible member. One of these members, e.g. the magnetically susceptible member, is connected to the tool electrode while the first member is connected to a support.

Abstract: A homogeneous cation-exchange membrane made of one or more fluorinated polymer having cation-exchangeable groups is swollen with a water miscible organic solvent and then the solvent is removed from the swollen membrane.The fluorinated polymer having cation-exchangeable groups has special characteristics to the water-miscible organic solvent because the cation-exchangeable groups have high affinity to the water-miscible organic solvent though the base of the fluorinated polymer may have water-and oil-repellent properties, whereby the cation-exchange membrane of the fluorinated polymer having cation-exchangeable groups is modified to reduce the permeability of hydroxyl group ions by swelling it and removing the water-miscible organic solvent.

Abstract: A cation-exchange membrane is prepared by immersing a monomer having lactone ring and/or a lactonizable monomer with or without a crosslinking agent or a polymerization initiator, into a fluorinated polymer membrane having cation-exchangeable groups and polymerizing the monomer.

Abstract: A cation-exchange membrane is prepared by impregnating a diene monomer having carboxylic acid group or a functional group which can be converted to a carboxylic acid group, into a fluorinated polymer membrane having cation-exchangeable groups; partially polymerizing said diene monomer; swelling the membrane with a water miscible organic solvent and heat-treating the swollen membrane and if necessary, converting the functional groups to carboxylic acid groups.

Abstract: A sulfur modified polychloroprene is produced in a process which comprises polymerizing chloroprene or a mixture of chloroprene and a comonomer in a neutral or acidic aqueous emulsion by using a cationic emulsifier in the presence of sulfur and a peroxide initiator, and then performing a peptization of the resulting sulfur modified polychloroprene latex by addition thereto of an alkaline aqueous solution in amounts sufficient to reduce the pH of the latex to alkaline conditions.

Abstract: A carrier for liquid chromatography having main units ##STR1## WHEREIN N=0 OR AN INTEGER OF 1 TO 3; M=0 OR 1; Q= AN INTEGER OF 1 TO 3; P=0 OR 1; W=90 TO 16; X=57 TO 2; Y=0 TO 30; Z=5 TO 30; B represents adenine, guanine, thymine, uracil or cytosine; X' represents OH Cl, Br or I; and CM represents styrene, a substituted styrene, acrylonitrile, a substituted acrylonitril, acrylic acid or a substituted acrylic acid and CCM represents crosslinking agent having two or more unsaturated group such as ethylene glycol diacrylate, divinylbenzene etc.

Abstract: A polyion complex is produced by reacting a weak acid type or a strong acid type polyanion polymer with a nucleic acid base-containing polycation polymer.

Abstract: A chromatography solid support is prepared by reacting a nucleic acid base, a related compound thereof or a mixture thereof with an epoxy group-containing porous gel in a solvent in the presence of a carbonate.

Abstract: Polymeric electrolyte complexes are prepared by reacting at least one polymer represented by one of the following formulas: ##STR1## wherein R.sub.1 and R.sub.2 represent hydrogen or alkyl of 1 to 4 carbon atoms; R.sub.3 is --CH.sub.2 --C(R).dbd.CH.sub.2, --(CH.sub.2).sub.m COOC(R).dbd.CH.sub.2,--CH.sub.2).sub.m COOCH.sub.2 --C(R).dbd.CH.sub.2, or --CH.sub.2).sub.m O-C(R).dbd.CH.sub.2,--CH.sub.2).sub.m O-CH.sub.2 -C(R).dbd.CH.sub.2 or ##STR2## wherein R is hydrogen or methyl, m is a number from 1 to 3 and n is 0 or 1; at least one of R.sub.4, R.sub.5 and R.sub.6 is --CH.sub.2 --C(R).dbd.CH.sub.2, --CH.sub.2).sub.m COOC(R).dbd.CH.sub.2, --CH.sub.2).sub.m COOCH.sub.2 OC(R).dbd.CH.sub.2,--CH.sub.2).sub.m O--C(R).dbd.CH.sub.2,--CH.sub.2).sub.m O--CH.sub.2 --C(R).dbd.CH.sub.2, --CH.sub.2).sub.m CONH-C(R).dbd.CH.sub.2 or ##STR3## wherein R is hydrogen or methyl, m is a number from 1 to 3 and n is 0 or 1; the remaining R.sub.4, R.sub.5 and R.sub.

Abstract: A polymer emulsion is produced by reacting a vinyl monomer having an active halogen with a higher amine in a monomer having ethylenically unsaturated double bond and then conducting a free radical polymerization with the addition of water.