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).
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Patent number: 4312783Abstract: A catalyst comprising (A) a solid catalyst component obtained by reacting a titanium compound having a hydrocarbyloxy group with an organoaluminum compound in the presence of an ether to give a liquid material or to give a solid titanium component (a) which is solubilized by addition of a tetravalent titanium halide with or without an ether without separation or after separation from the reaction mixture, and heat treating the liquid material at a temperature of 70.degree. to 180.degree. C. with or without addition of a tetravalent titanium halide, and (B) an organoaluminum compound is effective for polymerization or copolymerization of olefins with high stereoregularity and has high polymerization activity.Type: GrantFiled: July 16, 1980Date of Patent: January 26, 1982Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Masayoshi Miya, Katsuhiko Takaya, Haruyuki Yoneda
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Patent number: 4264472Abstract: A catalyst for preparing an .alpha.-olefin polymer having a broad molecular weight distribution and excellent physical properties, which comprises a solid catalyst component (A) and an organometal compound (B), the solid catalyst component (A) being obtained by reduction with an organomagnesium solution of the thermal decomposition solid product of special titanium compounds.Type: GrantFiled: August 29, 1979Date of Patent: April 28, 1981Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Tadashi Ikegami, Hisaya Sakurai, Yoshihiko Katayama, Shigeo Tsuyama, Yukitoshi Iwashita
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Patent number: 4255280Abstract: 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 an organomagnesium compound (1), of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.rwherein.alpha., p, q and r each independently .gtoreq.0,.beta.>0,p+q+r=m.alpha.+2.beta.M is Al, Zn, B or Be,m is the valence of M,R.sup.1 and R.sup.2 are the same or different hydrocarbon groups having 1-20 carbon atoms, andX is a halogen atom,or of the reaction product of M.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r with an electron donor, with 0.01 to 100 moles of (ii) a chlorosilane compound containing Si-H bonds and of the formulaH.sub.a SiClR.sub.4-(a+b).sup.3wherein0<a.ltoreq.Type: GrantFiled: March 12, 1979Date of Patent: March 10, 1981Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Hideo Morita, Masayoshi Miya, Katsuhiko Takaya, Haruyuki Yoneda
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Patent number: 4230831Abstract: An intimately melted and homogenized polyethylene composition having excellent physical properties and moldability and comprising a high-medium density polyethylene having a high molecular weight (A), a high-medium density polyethylene having a low molecular weight (B) and a low density polyethylene (C) characterized in that:(i) the average molecular weight of (A) is 100,000-1,000,000, the average molecular weight of (B) is 1,000-100,000, the molecular weight ratio of (A) to (B) is 5-200, and (C) has an intrinsic viscosity [.eta.] of 0.70 dl/g or more in decalin at 135.degree. C. and an expansion factor of 3.3 or more, and(ii) the mixing ratio (A)/(B) is 30/70 to 80/20 and the mixing ratio of (C) in the composition is within the range from 1% by weight to less than 15% by weight.Type: GrantFiled: September 25, 1979Date of Patent: October 28, 1980Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Yoshihiko Katayama, Tadashi Ikegami, Kisoo Moriguchi, Shigeru Mizutani
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Patent number: 4219453Abstract: An ethylene polymer film exhibiting improved impact strength and tear strength is provided. This film is made of an inorganic filler-incorporated ethylene polymer composition which is comprised of:(a) 35-90 wt.%, based on the ethylene polymer composition, of an ethylene polymer having a melt index of 0.005-0.2 and a specific gravity of 0.94- 0.98 as measured at a temperature of 23.degree. C.,(b) 10-65 wt.%, based on the ethylene polymer composition, of a finely divided inorganic filler particle having an average particle size of 0.01-10 microns,(c) 0.1-10 wt.parts, based on 100 wt.parts of the ingredient (b), of a higher fatty acid,(d) 0.5-15 wt.parts, based on 100 wt.parts of the ingredient (b), of a metal salt of a higher fatty acid, and(e) 0.05-5 wt.parts, based on 100 wt.parts of the ingredient (b), of a stabilizer composition predominantly comprised of a phenolic stabilizer.The ethylene polymer film is produced by extruding the ethylene polymer composition at 150.degree.-250.degree. C.Type: GrantFiled: September 15, 1978Date of Patent: August 26, 1980Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Kisoo Moriguchi, Yoshihiko Katayama
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Patent number: 4159965Abstract: A catalyst useful for polymerizing olefins, capable of providing an extremely high catalyst efficiency, excellent grain size and high bulk density of polymer; production of polymer having various molecular weight distributions from a broader range to a narrower range and controlling of die swell of formed polymer, by using a mechanical grinding and contacting means. Said catalyst shows a high activity and higher stereoregularity in the polymerization of polypropylene when it is used together with an electron donor compound.Said catalyst comprises a solid catalyst component (A) and an organometallic compound (B), said catalyst component (A) is obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound (ii) and reacting and/or grinding-contacting the solid obtained by the reaction of (i) and (ii) with a titanium and/or vanadium compound containing at least one halogen atom.The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.Type: GrantFiled: September 26, 1977Date of Patent: July 3, 1979Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Hideo Morita, Tadashi Ikegami, Shigeo Tsuyama
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Patent number: 4159963Abstract: Novel highly active catalysts useful for highly stereospecific polymerization of olefin which enables to produce polymer of good grain size having a high stereoregularity can be obtained by a combination of [A] a solid catalyst component obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound containing Si--H (ii) to obtain a solid (1) and reacting said solid (1) with a titanium compound containing at least one halogen atom (2) and a carboxylic acid or a derivative thereof (3) and [B] a component consisting of an organometallic compound and a carboxylic acid or a derivative thereof.The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein .alpha. is a number of 0 or greater than 0; .beta.> 0; p, q, r and s are each a number of 0 or greater; p+q+r+s=m.alpha.+2.beta. wherein m is the valency of M; M is a metal element of the 1st to the 3rd group of the Periodical Table; R.sup.1 and R.sup.Type: GrantFiled: January 30, 1978Date of Patent: July 3, 1979Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Hideo Morita, Tadashi Ikegami, Masayoshi Miya
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Patent number: 4159256Abstract: Novel high active catalysts useful for highly stereospecific polymerization of olefin which enables to produce polymer of low content of catalyst residue, and of good grain size having a high stereoregularity can be obtained by a combination of [A] a solid catalyst component obtained by reacting and/or grinding a specified organomagnesium component (i) with a specified chlorosilane compound containing Si-H (ii) to obtain a solid (1) and reacting said solid (1) with a titanium compound containing at least one halogen atom (2) and a carboxylic acid or a derivative thereof (3) and [B] a component consisting of an organometallic compound and a carboxylic acid or a derivative thereof. The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein .alpha. is a number of 0 or greater than 0; .beta.>0, p, q, r, and s are each a number of 0 or greater; p+q+r+s=m.alpha.+2.beta.Type: GrantFiled: February 10, 1978Date of Patent: June 26, 1979Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Hideo Morita, Tadashi Ikegami, Masayoshi Miya, Katsuhiko Takaya
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Patent number: 4146549Abstract: A novel process for polymerizng ethylene or a mixture of ethylene and another olefin is provided. In this process a novel catalyst having a very high activity per solid component of catalyst is used. Said catalyst is prepared by reacting a specific hydrocarbon-soluble organoaluminum-magnesium complex containing alkoxy, aryloxy, siloxy or siloxane groups, with one or more kinds of a titanium or vanadium compound having at least one halogen atom, and subsequently reacting the thus obtained hydrocarbon-insoluble reaction product (A) with a specified organoaluminum compound (B).Type: GrantFiled: February 14, 1977Date of Patent: March 27, 1979Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Itsuho Aishima, Hisaya Sakurai, Yukichi Takashi, Hideo Morita, Tadashi Ikegami, Toshio Sato
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Patent number: 4120883Abstract: A method for producing an organomagnesium complex which is soluble in an inert hydrocarbon medium and expressed by the general formula Mg.sub..alpha. Al.sub..beta. R.sup.1 .sub.p Y.sub.q is provided. In this formula.alpha., .beta., p and q each is a number greater than zero,.alpha./.beta. = about 0.5 to 20,2.alpha. and 3.beta. = p + q,q/.beta. = about 0.5 to 1.5,Y is OR.sup.2 or OSiR.sup.3 R.sup.4 R.sup.5,R.sup.1, r.sup.2 and R.sup.3 each independently is a hydrocarbon radical having 1 to 20 carbon atoms, andR.sup.4 and R.sup.5 each independently is a hydrocarbon radical having 1 to 20 carbon atoms, hydrogen or a halogen atom.Said complex is prepared by reacting (A) an organomagnesium compound R.sup.1.sub.a M.sub.g X.sub.2-a wherein x is halogen, with (B) an aluminum compound AlYX.sub.2 wherein Y and X have the same meanings as above-defined. This method is superior to the prior art with respect to ease of reaction, high reaction efficiency and safety. Further the complex is safe during storage and handling.Type: GrantFiled: December 13, 1976Date of Patent: October 17, 1978Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisaya Sakurai, Hideo Morita, Tadashi Ikegami, Katsuaki Maeda, Masayasu Furusato
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Patent number: 4027089Abstract: A novel process for polymerizing ethylene or a mixture of ethylene and another olefin is provided. In this process a novel catalyst having a very high activity per solid component of catalyst is used. Said catalyst is prepared by reacting a specific hydrocarbon-soluble organoaluminum-magnesium complex containing alkoxy, aryloxy, siloxy or siloxane groups, with one or more kinds of a titanium or vanadium compound having at least one halogen atom, and subsequently reacting the thus obtained hydrocarbon-insoluble reaction product (A) with a specified organoaluminum compound (B).Type: GrantFiled: May 21, 1975Date of Patent: May 31, 1977Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Itsuho Aishima, Hisaya Sakurai, Yukichi Takashi, Hideo Morita, Tadashi Ikegami, Toshio Sato
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Patent number: 4004071Abstract: Polyethylene or copolymers of ethylene with another .alpha.-olefin can be produced by the use of a novel polymerization catalyst obtained by using, in combination, (A) a specified, hydrocarbon-insoluble solid component prepared by reacting (i) a specific, hydrocarbon-soluble organoaluminum-magnesium complex (Al.sub.n Mg.sub.m R.sub.n(3.sub.-.sub..alpha.).sup.1 -R.sub.2m.sup.2 H.sub.n, wherein R.sup.1 and R.sup.2 are hydrocarbon radicals) with (ii) a titanium or vanadium compound containing halogen atom(s), and (B) an organoaluminum compound. This catalyst exhibits a surprisingly high activity per the unit amount of the solid component.Type: GrantFiled: April 17, 1975Date of Patent: January 18, 1977Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Itsuho Aishima, Hisaya Sakurai, Yukichi Takashi, Hideo Morita, Tadashi Ikegami, Toshio Sato
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Patent number: 3989878Abstract: A process for polymerizing ethylene or a mixture of ethylene and another olefin is proposed in which the polymerization can be carried out with an extremely high efficiency by using a catalyst prepared by reacting (A) a hydrocarbon-insoluble reaction product (obtained by reacting (i) a specified organomagnesium-containing hydrocarbon-soluble complex, or reaction product of (i), with (ii) a specified siloxane compound and with (iii) at least one kind of titanium or vanadium compound containing at least one halogen atom), with (B) a specified organoaluminum compound. Resultant polymers have a high molecular weight and a high rigidity and molecular weight and molecular weight distribution thereof can be easily controlled.Type: GrantFiled: May 21, 1975Date of Patent: November 2, 1976Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Itsuho Aishima, Hisaya Sakurai, Yukichi Takashi, Hideo Morita, Tadashi Ikegami, Toshio Sato