Patents by Inventor Hisaya Sakurai

Hisaya Sakurai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4772679
    Abstract: Crystalline aromatic polyketones having a linear polymer structure comprising repeating units [I] of ##STR1## and repeating units [II] of ##STR2## the repeating units [I] and [II] are bonded alternately, and the polymer has an intrinsic viscosity of at least 0.4, has excellent properties, particularly heat resistance, and can be used as shaped articles, coatings, films, fibers, etc.
    Type: Grant
    Filed: December 13, 1985
    Date of Patent: September 20, 1988
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Isaburo Fukawa, Haruyuki Yoneda, Hisaya Sakurai
  • Patent number: 4526941
    Abstract: A process for polymerizing an .alpha.-olefin which comprises contacting the .alpha.-olefin at a temperature of about 10.degree. C. to about 100.degree. C. with a catalyst comprising a slurry component (A) and an organometallic component (B), the component (A) being obtained, without intermediate or final solids separation, by reacting (1) a slurry reaction mixture produced by reacting one mol of (i) a hydrocarbon-soluble organomagnesium component of the general formulaM.alpha.Mg.beta.R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.sor of the reaction product of M.alpha.Mg.beta.R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.s with at least one electron donor selected from the group consisting of ethers, thioethers, ketones, aldehydes, carboxylic acids or derivatives thereof, alcohols, thioalcohols and amines, with 0.1 to 10 mols of (ii) a chlorosilane compound of the formulaH.sub.a SiCl.sub.b R.sub.4-(a+b).sup.10at a temperature of about 20.degree. C. to about 150.degree. C.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: July 2, 1985
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Tadashi Ikegami, Masayoshi Miya, Katsuhiko Takaya
  • Patent number: 4471066
    Abstract: A catalyst useful for polymerizing olefins which comprises a solid catalyst component [A] and an organometallic component [B], the solid catalyst component [A] being obtained by reacting (1) an organometallic compound with (2) a transition metal compound selected from the group consisting of a titanium compound, a vanadium compound, a mixture of a titanium compound and a vanadium compound and a mixture of a titanium compound and a zirconium compound, in the presence of (3) a solid reaction product of (a) an organomagnesium compound of the formulaM.sub..alpha. MgR.sub.p X.sub.q.D.sub.rwherein.alpha., p, q and r each independently is 0 or a number greater than 0,p+q=m.alpha.+20.ltoreq.q/(.alpha.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: September 11, 1984
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Masayasu Furusato
  • Patent number: 4431568
    Abstract: A catalyst useful for polymerizing olefins which comprises a solid catalyst component [A] and an organometallic component [B], the solid catalyst component [A] being obtained by reacting (1) a solid inorganic oxide, (2) a hydrocarbon-soluble organomagnesium component of the general formulaM.sub..alpha. M.sub.g.beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein.alpha., p, q, r and s each independently is 0 or a number greater than 0,.beta.is a number greater than 0,p+q+r+s=m.alpha.+2.beta.,m is the valence of M,M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 and R.sup.2 each independently is a hydrocarbon group having 1 to 20 carbon atoms,X and Y each independently is an OR.sup.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 or SR.sup.9 group wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each independently is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms and R.sup.
    Type: Grant
    Filed: December 15, 1981
    Date of Patent: February 14, 1984
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Masayoshi Miya, Hisaya Sakurai, Tadashi Ikegami
  • Patent number: 4423185
    Abstract: Disclosed is a soft and flexible thermoplastic resinous composition having high impact and tear resistances, a good processability and a good thermal adhesion to a wide variety of plastic and other materials. The resinous composition consists essentially of 5 to 70 wt. % of a thermoplastic polyurethane elastomer and 30 to 95 wt. % of a modified polyolefin or an olefin copolymer, having functional groups of at least one type selected from carboxyl, carboxylate salt, carboxylic anhydride, amide, hydroxyl and epoxy groups.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: December 27, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Koichi Matsumoto, Yoshihiko Katayama, Hisaya Sakurai
  • Patent number: 4410595
    Abstract: Disclosed is a soft and flexible thermoplastic resinous composition having high impact and tear resistances, a good processability and a good thermal adhesion to a wide variety of plastic and other materials. The resinous composition consists essentially of 5 to 70 wt. % of a thermoplastic polyurethane elastomer and 30 to 95 wt. % of a modified polyolefin or an olefin copolymer, having functional groups of at least one type selected from carboxyl, carboxylate salt, carboxylic anhydride, amide, hydroxyl and epoxy groups.
    Type: Grant
    Filed: August 31, 1982
    Date of Patent: October 18, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Koichi Matsumoto, Yoshihiko Katayama, Hisaya Sakurai
  • Patent number: 4399272
    Abstract: A process for producing a polyacetal copolymer, which comprises copolymerizing formaldehyde and a compound selected from the group consisting of alkylene oxides, poly(alkylene oxides), cyclic formals and poly (cyclic formals) in the presence of a Lewis acid and an anionic polymerization catalyst with the exception of metal chelate compounds.
    Type: Grant
    Filed: November 4, 1980
    Date of Patent: August 16, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Minoru Hamada, Kazuhiko Matsuzaki, Muneaki Aminaka
  • Patent number: 4387045
    Abstract: An olefin polymerization catalyst comprising a solid catalyst (I) and an organometallic compound (II), wherein said solid catalyst (I) is obtainable by reacting an organomagnesium compound (a) soluble in hydrocarbon solvent and represented by the following formula:MgR.sup.1.sub.p R.sup.2.sub.q X.sub.r(in the formula, R.sup.1 and R.sup.2, identical or different, represent a secondary or tertiary alkyl group having 4-6 carbon atoms, X represents a negative group containing O, N or S atom, p and q represent a number of 0-2, r represents a number of 0-1, and p, q and r satisfy: p+q+r=2) with a compound of titanium or vanadium having at least one halogen atom (b), has a high activity, is uniform, has a high density, is suitable for continuous polymerization of olefins, and enables to omit the catalyst removal step after the polymerization reaction.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: June 7, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Hideo Morita, Tadashi Ikegami, Masayasu Furusato
  • Patent number: 4381252
    Abstract: A catalyst suitable for polymerizing an .alpha.-olefin, comprising a solid catalyst component [A] and an organometal compound [B], the solid catalyst component [A] being prepared by reacting an organomagnesium compound (1) soluble in a hydrocarbon medium and represented by the general formula,MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.Z.sub.swhereinR.sup.1 is a hydrocarbon group having 2 to 3 carbon atoms;R.sup.2 is a hydrocarbon group having 4 to 20 carbon atoms and the difference in number of carbon atoms between R.sup.1 and R.sup.2 is at least 2;X is an electronegative group having an oxygen atom, a nitrogen atom or a sulfur atom;Z is an organometal compound of aluminum, boron, beryllium, zinc, silicon or lithium;p and q each is a number above 0 to 1;r is a number from 0 to 1;p+q+r=2; ands is a number from 0.02 to 0.09,with a titanium and/or vanadium compound (2) having at least one halogen atom; and a process for polymerizing an .alpha.-olefin employing the same catalyst.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: April 26, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Masayasu Furusato
  • Patent number: 4380620
    Abstract: In a process for preparing polyoxymethylenes by polymerizing formaldehyde in the presence of an anionic polymerization catalyst, the use of a polyhydric alcohol having at least three alcoholic hydroxyl groups in the molecule permits the preparation of polyoxymethylenes which have desired molecular weights along with improved melt fluidity and which are excellent in processability.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: April 19, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Matsuzaki, Minoru Hamada, Hisaya Sakurai
  • Patent number: 4377667
    Abstract: A polyacetal suitable for moldings which are excellent in lubricity, wear and antistatic properties, which has at least one terminal of its linear polymer molecule capped with an alkylene oxide adduct of an alcohol or a carboxylic acid, which adduct is of the formula ##STR1## wherein R.sub.o is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.o 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000; the number average molecular weight of said polyacetal being in the range from 10,000 to 500,000 excluding the terminal group.
    Type: Grant
    Filed: June 4, 1981
    Date of Patent: March 22, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Minoru Hamada, Kazuhiko Matsuzaki
  • Patent number: 4376720
    Abstract: An olefin polymerization catalyst which shows an extremely high activity even at low temperatures and is suited for the production of blow molding polymers, said catalyst comprising a solid component constituted by a chromium compound supported by an inorganic oxide carrier, and an organomagnesium complex compound soluble in the inert hydrocarbons and represented by the general formula: M.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 R.sub.r.sup.3 X.sub.s Y.sub.t (wherein .alpha.>0, .beta.>0, p.gtoreq.0, q.gtoreq.0, r.gtoreq.0, s>0, t.gtoreq.0, 0<(s+t)/(.alpha.+.beta.).ltoreq.1.5 and p+q+r+s+t=m.alpha.+2.beta.; M is an atom selected from the group consisting of aluminum, zinc, boron, beryllium and lithium; m is the valence of M; R.sup.1, R.sup.2 and R.sup.3 may be same or different and represent respectively a hydrocarbon radical having 1 to 20 carbon atoms; X is OSiR.sup.5 R.sup.6 R.sup.7 ; and Y is a radical selected from the group consisting of OR.sup.4, OSiR.sup.5 R.sup.6 R.sup.7, NR.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: March 15, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Shigeo Tsuyama
  • Patent number: 4342708
    Abstract: Novel hydrocarbon-soluble isopropyl group-containing diorganomagnesium compounds and hydrocarbon solutions thereof are disclosed. The compound of the present invention has a high weight percent of Mg per one mol thereof, and the hydrocarbon solution of the present invention has a very low viscosity as compared with the conventional solutions. The hydrocarbon solution of the present invention can be prepared according any of various processes. If the reaction is carried out in an ether medium, the ether is substituted with a hydrocarbon solvent by removing the ether from the reaction mixture by distillation in the presence of the hydrocarbon solvent.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: August 3, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Shigeo Tsuyama
  • Patent number: 4336352
    Abstract: A polyethylene composition comprising a mixture of three kinds of polyethylenes (A), (B) and (C) characterized in that:(i) the viscosity average molecular weight of (A) is 1,000-100,000, the viscosity average molecular weight of (B) is 100,000-1,000,000, the viscosity average molecular weight of (C) is 400,000-6,000,000, the molecular weight ratio of (B) to (A), i.e. B/A, is 2-200 and the molecular weight ratio of (C) to (B), i.e. C/B, is 1.5 or more.(ii) the mixing ratio of (A) to (B) is 30/70 to 70/30 and the mixing ratio of (C) is 1-10% by weight based on the total composition, and(iii) the melt index of the composition is 0.001-1, and a process for producing said composition. This polyethylene composition is excellent in physical properties in that it has an appropriate die swell, a high melt tension and an excellent moldability and exhibits a high stiffness and a high ESCR.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: June 22, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Shigeru Mizutani
  • Patent number: 4335229
    Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to about 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formula,M.sub..alpha. MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2 D.sub.twherein.alpha., p, q, r and s each independently is 0 or a number greater than 0,t is a number greater than 0,p+q+r+s=m.alpha.+2,O.ltoreq.(r+s)/(.alpha.+1)<2,m is the valance of M,M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 and R.sup.2 each independently is a hydrocarbon group having 1 to 20 carbon atoms,X.sup.1 and X.sup.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: June 15, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Masayasu Furusato
  • Patent number: 4331439
    Abstract: This invention deals with the coloring or dyeing of polyoxymethylene resins and particularly with preventing color migration therein. Color migration in molded articles of colored polyoxymethylene resins is prevented by dyeing the articles with disperse dyes, and treating the articles with a compound having one or more isocyanate groups, for example, a urethane prepolymer.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: May 25, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Minoru Hamada, Hisaya Sakurai, Jyunzo Masamoto, Takeo Yoshida, Hiroshi Hazawa
  • Patent number: 4330646
    Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to about 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2wherein.alpha., p, q, r and s each independently is 0 or a number greater than 0,.beta. is 1 or a number greater than 1,p+q+r+s=m.alpha.+2.beta.,0.ltoreq.(r+s)/(.alpha.+.beta.)<2,m is the valence of M,M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 and R.sup.2 each independently is a hydrocarbon group having 1 to 20 carbon atoms,X.sup.1 and X.sup.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: May 18, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Masayasu Furusato
  • Patent number: 4330650
    Abstract: Catalysts for polymerization of olefin which comprise a solid catalyst component (A) and an organometallic compound with a heterocyclic carboxylic acid ester (B), wherein the solid catalyst component (A) is obtained by reacting or/and grinding a special magnesium compound (1), a titanium halide (2) and a carboxylic acid ester (3); and the heterocyclic carboxylic acid ester is N-, S- or O-containing heterocyclic compound, and processes for polymerization of olefin employing such a catalyst.
    Type: Grant
    Filed: March 28, 1980
    Date of Patent: May 18, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Hideo Morita, Masayoshi Miya, Katsuhiko Takaya, Haruyuki Yoneda
  • Patent number: 4330651
    Abstract: A catalyst for the solution polymerization of .alpha.-olefins is prepared by admixing component (A) with an organometal component (B), component (A) being prepared by reacting a specific hydrocarbon-soluble organomagnesium compound with an aluminum compound and contacting the obtained product with a titanium and/or vanadium compound.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: May 18, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Masayasu Furusato
  • Patent number: 4330647
    Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formula,M.sub..alpha. MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2 D.sub.t.alpha., p, q, r, s and t each independently is O or a number greater than 0,p+q+r+s=m.alpha.+2O.ltoreq.(r+s)/(.alpha.+1)<2,m is the valence of M, M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 is a secondary or tertiary alkyl group having 3 to 20 carbon atoms,X.sup.1 and X.sup.2 each independently is a hydrogen atom or an organic electronegative group containing O, N or S,D is an electron donor,with a compound (ii) of the formula,R.sub.a.sup.3 C Y.sub.4-awhereinR.sup.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: May 18, 1982
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Masayasu Furusato