Patents Assigned to Tokuyama Soda Kabushiki Kaisha
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Patent number: 4602075Abstract: A monomeric mixture for a cured polymeric material used as organic glass includes an aromatic di(meth)allyl carbonate (I), an aliphatic di(meth)allyl carbonate (II) and di(meth)allyl carbonate (III) having aromatic and aliphatic moieties. The amount of the di(meth)allyl carbonate of formula (III) is 0.1 to 10 parts by weight per 10 parts by weight of the aliphatic di(meth)allyl carbonate of formula (II). The monomeric mixture retains its uniform state without phase separation during long-term storage and gives a cured polymeric material having excellent transparency.Type: GrantFiled: November 13, 1984Date of Patent: July 22, 1986Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yasuji Kida, Kaoru Miura, Ikumi Kawaguchi
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Patent number: 4591575Abstract: A crystalline metal oxide in the form of a solid solution comprising an oxide of a metal of Group II of the periodic table, titanium oxide and silicon dioxide as main components and having main peaks at about 26.7.degree. and about 20.9.degree. in its Cu-K.alpha. X-ray diffraction pattern (2.theta.) and a specific refractive index. The crystalline metal oxide is produced, for example, by dissolving a compound of a metal of Group II of the periodic table, a hydrolyzable organic silicon compound and a hydrolyzable titanium compound in an organic solvent, hydrolyzing said starting compounds in said solution or after said solution is added to a separately prepared solvent incapable of dissolving the reaction product, thereby to form a sol- or gel-like product, and thereafter calcining the sol- or gel-like product at a temperature and for a period of time sufficient to crystallize said product.Type: GrantFiled: May 3, 1984Date of Patent: May 27, 1986Assignee: Tokuyama Soda Kabushiki KaishaInventors: Minahiro Okabayashi, Shigeki Yuasa, Koshi Kusumoto
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Patent number: 4587274Abstract: Disclosed is a process for the preparation of a fluorine-containing compound having a carboxyl group, which comprises irradiating a fluorine-containing compound having a sulfonyl group with ultraviolet rays in the presence of a nitrogen compound.According to this process, a fluorine-containing compound having a carboxyl group can be prepared from a fluorine-containing compound having a sulfonyl group at a high efficiency very simply by one step.Type: GrantFiled: November 26, 1984Date of Patent: May 6, 1986Assignee: Tokuyama Soda Kabushiki KaishaInventors: Akihiko Nakahara, Toshikatsu Sata, Masaki Shirouzu, Kenji Kunai
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Patent number: 4567030Abstract: Disclosed is an amorphous, spherical inorganic compound having a particle size of 0.1 to 1.0 .mu.m, which comprises as main constituents (1) an oxide of at least one metal selected from the group consisting of metals of the Groups I, II, III and IV of the Periodic Table, said metal oxide being capable of combining with silicon dioxide, and (2) silica.Type: GrantFiled: December 23, 1982Date of Patent: January 28, 1986Assignee: Tokuyama Soda Kabushiki KaishaInventors: Shigeki Yuasa, Minahiro Okabayashi, Hideki Ohno, Katsumi Suzuki, Koshi Kusumoto
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Patent number: 4563416Abstract: A solid state track detector composed of a crosslinked copolymer, said copolymer consisting essentially of(A) units derived from an alkylene glycol bisallyl carbonate represented by the general formula ##STR1## wherein R.sub.1 represents an alkylene group having 2 to 6 carbon atoms, and n is an integer of from 1 to 6, and(B) units derived from an alkyl acrylate or methacrylate represented by the general formula ##STR2## wherein R.sub.2 represents a hydrogen atom or a methyl group and R.sub.3 represents an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms,the proportion of said units derived from the alkyl acrylate or methacrylate of formula (II) being 0.5 to 3 mole % based on the crosslinked copolymer.Type: GrantFiled: September 28, 1984Date of Patent: January 7, 1986Assignee: Tokuyama Soda Kabushiki KaishaInventors: Kazuo Shikata, Yoshinori Mizumoto
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Patent number: 4535102Abstract: Disclosed is an adhesive coating material for a hard tissue, which comprises (1) a polymer having an acid value of 30 to 700 and including in recurring units a hydrophobic group and two carboxyl (--COOH) groups or one carboxylic anhydride ##STR1## group bonded to the polymer, said carboxyl groups or carboxylic anhydride group being bonded to adjacent carbon atoms, and (2) a polymerizable vinyl compound or a mixture of said polymerizable vinyl compound and an organic titanate compound.Type: GrantFiled: October 6, 1983Date of Patent: August 13, 1985Assignee: Tokuyama Soda Kabushiki KaishaInventors: Koshi Kusumoto, Toshio Kawaguchi, Takeshi Nakahara, Shinichiro Kunimoto
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Patent number: 4533701Abstract: Disclosed is an adhesive coating material for a hard tissue, which comprises (1) a polymer having an acid value of 30 to 700 and including a hydrophobic group and two carboxyl (--COOH) groups or one carboxylic anhydride ##STR1## group bonded to the polymer, said carboxyl groups or carboxylic anhydride group being bonded to adjacent carbon atoms, and (2) an organic titanate compound.Type: GrantFiled: August 16, 1983Date of Patent: August 6, 1985Assignee: Tokuyama Soda Kabushiki KaishaInventors: Koshi Kusumoto, Toshio Kawaguchi, Takayuki Ogata
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Patent number: 4472485Abstract: A stretched composite film composed of a first film layer (A) of a saponified product of an ethylene/vinyl acetate copolymer, and melt-laminated respectively to both surfaces of the first film layer (A), second film layers (B) and (B') of a blend composed of an unsaturated carboxylic acid-grafted polypropylene and polypropylene, said blend having (i) an ethylene content, C.sub.2, of at most 0.6% by weight and (ii) a melt flow index, MFI, of not more than 25 g/10 minutes with (iii) the ethylene content (C.sub.2) and the melt flow index (MFI) satisfying the expression log MFI.ltoreq.1.4(1-C.sub.2). The composite film optionally further comprises a third film layer (C) of a thermoplastic synthetic resin melt-laminated to the surface of one of the second film layers (B) and (B').Type: GrantFiled: November 22, 1982Date of Patent: September 18, 1984Assignee: Tokuyama Soda Kabushiki KaishaInventors: Akira Tabuse, Michio Nakatsukasa, Mitsuo Kamura
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Patent number: 4465579Abstract: A bipolar electrolytic cell has a plurality of unit cells electrically aligned in series, each of the unit cells being divided into an anode chamber and a cathode chamber by an ion-exchange membrane, and each of the anode and cathode chambers having a supply pipe and a discharge pipe which are respectively connected at one end to common headers. The other end of each of the supply or discharge pipes in the anode or cathode chambers is inserted deep into the respective electrode chamber so that at least 50% of the electrical resistance of the liquid in each pipe exists in the electrode chamber, and the wall of the inserted portion of each pipe electrically insulates the liquid in the pipe from a liquid in the electrode chamber.Type: GrantFiled: April 14, 1982Date of Patent: August 14, 1984Assignee: Tokuyama Soda Kabushiki KaishaInventors: Sinichiro Mataga, Makoto Takenaka
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Patent number: 4369298Abstract: A cured resin consisting substantially of a first polymer unit derived from an unsaturated compound having two terminal vinyl groups consisting of bis(alkyleneoxyphenyl)-diacrylates or dimethacrylates, bis(alkyleneoxyphenyl)diallyl ethers, and bis(alkyleneoxyphenyl)diallyl carbonates, and a second polymer unit derived from another unsaturated compound radical-polymerizable with the first-mentioned unsaturated compound, said polymer units being bonded to each other at random.The aforesaid cured resin can be producted by copolymerizing an intimate mixture consisting substantially of at least one compound selected from the first-mentioned unsaturated compounds having two terminal vinyl groups and prepolymers thereof and at least one compound selected from other unsaturated compounds radical-copolymerizable with the first-mentioned unsaturated compounds and prepolymers thereof in the presence of a radical polymerization initiator.Type: GrantFiled: May 19, 1981Date of Patent: January 18, 1983Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yasuji Kida, Kazuo Shikata
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Patent number: 4321161Abstract: Disclosed is a liquid-absorbing shaped body comprising a fibrous material and an inorganic powder in which the volume of fine pores having a pore radius less than 0.5.mu. is at least 2.5 cc/g. This shaped body is excellent in the liquid-absorbing capacity and liquid-retaining property to various kinds of liquids.Type: GrantFiled: August 15, 1980Date of Patent: March 23, 1982Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yoshiaki Watanabe, Genji Taga, Takanori Teshima
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Patent number: 4294810Abstract: Disclosed is an alkali calcium silicate having two different X-ray diffraction patterns: (1) with diffraction peaks at spacings (d) of 11.8-12.2 A, 6 A and 3 A or (2) with diffraction peaks at spacings (d) of 13.0-13.4 A, 6.7 A and 3.1 A. This silicate is in the fibrous or micaceous form and is valuable as a drying agent or an ion exchange agent. This silicate is prepared by hydrothermal reaction of an aqueous suspension having a specific composition of the starting components.Type: GrantFiled: February 27, 1980Date of Patent: October 13, 1981Assignee: Tokuyama Soda Kabushiki KaishaInventors: Genji Taga, Teruo Oikawa, Yoshiaki Watanabe
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Patent number: 4294943Abstract: A process for preparing a fluorine-containing polymer having carboxyl groups, which comprises subjecting a fluorine-containing polymer having sulfonyl halide groups bonded to it to an oxidation reaction at a temperature of not more than 250.degree. C.; and a process for electrolysis, using as a diaphragm a member of the polymer obtained by the above process.Type: GrantFiled: November 28, 1979Date of Patent: October 13, 1981Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yasuharu Onoue, Toshikatsu Sata, Akihiko Nakahara, Junichi Itoh
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Patent number: 4279883Abstract: In a process for preparing hydrogen peroxide by reacting hydrogen with oxygen in the presence of a catalyst in an aqueous medium containing hydrogen peroxide, the improvement which comprises using an aqueous medium which contains dissolved hydrogen and a platinum-group catalyst having adsorbed thereto hydrogen.Type: GrantFiled: December 3, 1976Date of Patent: July 21, 1981Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yusuke Izumi, Hidetaka Miyazaki, Shin-ichi Kawahara
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Patent number: 4277457Abstract: Disclosed is an alkali calcium silicate having two different X-ray diffraction patterns (1) with diffraction peaks at spacings (d) of 11.8-12.2 A, 6 A and 3 A or (2) with diffraction peaks at spacings (d) of 13.0-13.4 A, 6.7 A and 3.1 A. This silicate is in the fibrous or micaceous form and is valuable as a drying agent or an ion exchange agent. This silicate is prepared by hydrothermal reaction of an aqueous suspension having a specific composition of the starting components.Type: GrantFiled: July 5, 1979Date of Patent: July 7, 1981Assignee: Tokuyama Soda Kabushiki KaishaInventors: Genji Taga, Teruo Oikawa, Yoshiaki Watanabe
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Patent number: 4267084Abstract: The present invention provides a vinyl chloride polymer composition comprising an intimate mixture of a first vinyl chloride polymer containing a sulfide linkage in the molecular chain and a second vinyl chloride polymer having a higher molecular weight than the first polymer, and a process for producing a first vinyl chloride polymer for use in the composition, comprising polymerizing vinyl chloride or a mixture of vinyl chloride and an ethylenically unsaturated monomer in the presence of a free radical initiator using as a chain transfer agent a mercapto compound or a disulfide compound. Said vinyl chloride polymer composition has been improved in heat stability and processability.Type: GrantFiled: October 2, 1979Date of Patent: May 12, 1981Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yukio Mizutani, Katsuo Mitani, Takashi Maehara
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Patent number: 4248677Abstract: This invention relates to a process for producing alpha-aminocarboxylic acids and salts thereof. More specifically, this invention relates to a process for producing alpha-aminocarboxylic acids or salts thereof from organic imine compounds by electrochemical reduction.Type: GrantFiled: July 10, 1979Date of Patent: February 3, 1981Assignee: Tokuyama Soda Kabushiki KaishaInventor: Shozo Kato
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Patent number: 4226636Abstract: A process for producing calcium silicate of the rational formula 2CaO.3SiO.sub.2.nSiO.sub.2.mH.sub.2 O wherein m is a number of more than 0, and n is a number of 0.1 to 10 from a silicate compound and a calcium compound, which comprises contacting a water-soluble silicate compound with a calcium compound in an aqueous medium, and heating them to a temperature of 150.degree. to 250.degree. C., the amount of the aqueous medium being 5 to 100 times the weight of the calcium silicate obtained, and a process for producing calcium silicate or a calcium silicate-gypsum composite, which comprises adding a water-soluble silicate or its aqueous solution gradually to an aqueous suspension of gypsum, and heating the mixture to a temperature of 150.degree. to 250.degree. C. The calcium silicate and the calcium silicate-gypsum composite, which have a structure composed of an assembly of petal-like flakes, are useful as an adsorbent carrier, a delusterant or a filtration aid.Type: GrantFiled: December 29, 1978Date of Patent: October 7, 1980Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yukio Mizutani, Yoshiaki Watanabe, Genji Taga
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Patent number: 4217298Abstract: A process for producing an organic carbonate, which comprises reacting an alkali metal carbonate, carbon dioxide gas, an alcohol and an organic halide in the presence of a catalyst.Type: GrantFiled: September 1, 1978Date of Patent: August 12, 1980Assignee: Tokuyama Soda Kabushiki KaishaInventors: Kazuo Shikata, Toshiaki Shigemune
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Patent number: 4200711Abstract: A process for preparing a fluorine-containing polymer having carboxyl groups, which comprises subjecting a fluorine-containing polymer having sulfonyl halide groups bonded to it to an oxidation reaction at a temperature of not more than 250.degree. C.; and a process for electrolysis, using as a diaphragm a member of the polymer obtained by the above process.Type: GrantFiled: April 21, 1978Date of Patent: April 29, 1980Assignee: Tokuyama Soda Kabushiki KaishaInventors: Yasuharu Onoue, Toshikatsu Sata, Akihiko Nakahara, Junichi Itoh