Patents Assigned to Mitsui Petrochemical Industries, Ltd.
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Patent number: 5446097Abstract: A vulcanizable rubber composition comprising a conjugated diene rubber (A), an ethylene-alpha-olefin copolymer rubber (B) and a styrene oligomer (C) is provided. The composition is capable of providing a vulcanized rubber which is excellent not only in weather resistance and heat aging characteristics, but also in mechanical strength.Type: GrantFiled: September 21, 1993Date of Patent: August 29, 1995Assignee: Mitsui Petrochemical Industries Ltd.Inventors: Shuichi Nonaka, Norihito Ueki, Takashi Mishima
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Patent number: 5442121Abstract: A process for producing N,N-disubstituted aminophenol which comprises the steps of:obtaining a reaction mixture containing N-substituted aminophenol by reacting a dihydric phenol and an amine;subjecting said reaction mixture to heat treatment so as to thermally decompose quaternary ammonia salt contained in said reaction mixture into a dihydric phenol and an amine, and removing at least said amine by distillation;separating high-boiling impurities by distillation to separate N-substituted aminophenol; andsubjecting said separated N-substituted aminophenol to reduction alkylation using an aldehyde compound.According to the present invention, high-purity N,N-disubstituted aminophenol can be obtained in a high yield at high selectivity, and a reduction catalyst can be used repeatedly because its activity can be maintained at a high level and yet it can retain high activity for a long period of time.Type: GrantFiled: November 15, 1994Date of Patent: August 15, 1995Assignee: Mitsui Petrochemical Industries Ltd.Inventors: Shigeki Nagamatsu, Tomohiro Arase, Masaaki Yasuda
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Patent number: 5439534Abstract: A magnetic core having a low core loss and having stable characteristics in a low magnetic permeability region can be obtained at a high yield by applying a heat treatment to a magnetic core main body obtained by winding or laminating a ferrous amorphous ribbon In a wet atmosphere containing a limited amount of steam.Type: GrantFiled: November 4, 1992Date of Patent: August 8, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Masato Takeuchi, Yoshihiko Hirota, Hiroshi Ohmori, Masaru Yoshimura
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Patent number: 5439973Abstract: The cycloolefin resin compositions of the present invention comprise:[A] cycloolefin resin selected from (a-1) a cycloolefin random copolymer having recurring units derived from a cycloolefin of a specific structure, (a-2) a ring opening (co)polymer of the cycloolefin, (a-3) a hydrogenation product of the ring opening (co)polymer and (a-4) a graft-modified product of the random copolymer (a-1), the ring opening (co)polymer (a-2) and the hydrogenation product thereof (a-3);[B] at least one of (b-1) an unmodified elastomer, (b-2) a modified elastomer, (b-3) an unmodified crystalline polyolefin and (b-4) a modified crystalline polyolefin; and[C] a polyamide resin. Molded products formed from these cycloolefin resin compositions are excellent particularly in resistance to greases.Type: GrantFiled: November 2, 1994Date of Patent: August 8, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Sanehiro Yamamoto, Toshio Kimura, Takasi Nakagawa, Akinori Toyota
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Patent number: 5438100Abstract: The olefin polymer composition according to the invention comprises [I] an .alpha.-olefin/polyene copolymer-containing polymer in an amount of 0.005 to 99 by weight, said .alpha.-olefin/polyene copolymer-containing polymer comprising (i) an .alpha.-olefin/polyene copolymer and (ii) a polypropylene, and [II] a polymer of .alpha.-olefin having 3 or more carbon atoms in an amount of 1 to 99.995% by weight. The olefin polymer composition comprising the .alpha.-olefin/polyene copolymer-containing polymer [I] and the olefin polymer [II] has a high melt tension and an excellent moldability in an inflation molding, and further it can be molded into a large sized container, etc. by means of a blow molding or the like.Type: GrantFiled: January 18, 1994Date of Patent: August 1, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsunori Shinozaki, Mamoru Kioka
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Patent number: 5438110Abstract: An olefin polymerization catalyst formed from (A) a solid titanium catalyst component containing magnesium, titanium and halogen as essential ingredients, (B) an organoaluminum compound, and (C) an organosilicon compound containing a cyclopentyl group, a cyclopentenyl group, a cyclopentadienyl group or a derivative derived from any of these groups.A polymerization process which comprises polymerizing or copolymerizing olefins in the presence of the olefin polymerization catalyst to form a homopolyolefin having high stereoregularity or a copolyolefin having a narrow composition distribution.Type: GrantFiled: October 24, 1994Date of Patent: August 1, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Naoshi Ishimaru, Mamoru Kioka, Akinori Toyota
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Patent number: 5436094Abstract: A bulky synthetic pulp sheet which does not lose its shape even after having absorbed a liquid and has excellent resistance against to chemicals such as acids and alkalis, and a process for preparing the same, which pulp sheet contains 5 to 95% by weight of a synthetic pulp having a drainage factor over a range of from 0.1 to 2.0 sec/g, and 5 to 50% by weight of a polymer binder having a melting point lower than a melting point or a decomposition temperature of said synthetic pulp, the sheet being obtained by subjecting a mixture of the synthetic pulp and fibrous binder to wet laid sheet-making followed by a heat treatment, and having an apparent density of 0.15 g/cm.sup.3 or smaller under the load of 200 g/cm.sup.2.Type: GrantFiled: March 18, 1994Date of Patent: July 25, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Koji Horimoto, Makoto Nakamaru, Yukio Kohno
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Patent number: 5430754Abstract: A solid state laser apparatus is capable of suppressing a mode hopping phenomena by restricting longitudinal modes except a fundamental mode, thereby providing a very stable output. The solid state laser apparatus includes such components as a semiconductor laser emitting a pumping radiation for exciting a lasant material, a lens systems for focusing the pumping radiation and an optical resonator including a concave mirror. The lasant material may be formed of Nd:YVO.sub.4 doped with approximately 1 at % of Nd and a non-linear optical element may be formed of KTiOPO.sub.4 with an inclined c-axis.Type: GrantFiled: November 2, 1993Date of Patent: July 4, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Kenji Suzuki, Akira Eda, Katsuhiko Shimomura
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Patent number: 5430119Abstract: A stretched molded article of ultra-high-molecular-weight polypropylene having an intrinsic viscosity [.eta.] of at least 4 dl/g, which has a degree of orientation of not less than 0.930 when obtained as a degree of orientation by an X-ray diffraction half-width, two or more of peak positions (melting points) within the temperature region of not lower than 180.degree. C. when measured by a differential scanning calorimeter, and an amount of output energy of not less than 1 kgfm/g after 10-time repetition under a load of 50% of the breaking strength.Type: GrantFiled: October 31, 1994Date of Patent: July 4, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Masahiro Kouya, Kazuo Yagi, Akio Fukui, Masahiro Ogawa
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Patent number: 5430117Abstract: There have been provided by the present invention a higher .alpha.-olefin copolymer which has an intrinsic viscosity [.eta.], as measured in decalin at 135.degree. C., of 0.1 to 10 dl/g, and comprises polymer units derived from 95-30 parts by mol of a higher .alpha.-olefin of C.sub.6-20, 5-70 parts by mol of an aromatic ring-containing vinyl monomer represented by the formula [I] (total of the higher .alpha.-olefin and the vinyl monomer are 100 parts by mol), and 0.01 to 30% by mol of a non-conjugated diene represented by the formula [II]; ##STR1## wherein n is an integer of 0 to 5, and R.sup.1, R.sup.2 and R.sup.3 are each independently H or C.sub.1-8 alkyl; ##STR2## wherein n is an integer of 1 to 5, R.sup.4 is C.sub.1-4 alkyl, R.sup.5 and are each independently H or C.sub.1-8 alkyl but are not H simultaneously, a process for the preparation thereof, a higher .alpha.-olefin copolymer composition comprising [A] the higher .alpha.Type: GrantFiled: July 13, 1994Date of Patent: July 4, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Masaaki Kawasaki, Keiji Okada, Kenzaburo Fukutani, Tetsuo Tojo, Akemi Uchimi
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Patent number: 5428109Abstract: A hot-melt adhesive composition containing, (A) per 10 to 80 parts by weight of a base polymer, (B) 10 to 80 parts by weight of a stickiness-imparting agent which is a copolymer of a particular styrene-type monomer and a particular indene-type monomer, the molar ratio of the indene-type monomer to the styrene-type monomer being from 99/1 to 30/70, and the weight average molecular weight of said copolymer being from 300 to 5000. The hot-melt adhesive composition exhibits excellent heat-resistant adhesiveness and heat-resistant creeping property, and has a low-molecular weight and exhibits good hue.Type: GrantFiled: December 16, 1993Date of Patent: June 27, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Toshiaki Kuroiwa, Tuneaki Muro, Suguru Tokita, Hajime Inagaki
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Patent number: 5424378Abstract: The catalyst for olefin polymerization of the present invention contains R.sup.1.sub.k R.sup.2.sub.1 R.sup.3.sub.m M(SO.sub.3 R.sup.4) (M=Zr, Ti or Hf; R.sup.1-3 =a group having a cyclopentadienyl skeleton) as a catalyst component of a transition metal compound. According to the catalyst of the invention, an olefin polymer having excellent particle properties can be prepared with high polymerization activities, and further a copolymer having a narrow composition distribution can be prepared when two or more monomers are copolymerized. Of the above-mentioned transition metal compounds, a compound represented by the following formula is a novel compound unknown so far and shows excellent catalytic properties. ##STR1## (Cp=a group having a cyclopentadienyl skeleton, X=SO.sub.3 R, a halogen atom, R, OR, NR.sub.n, S(O).sub.q R, SiR.sub.3 or P(O).sub.q R.sub.3, n=1, 2 or 3; q=0, 1 or 2).Type: GrantFiled: July 28, 1994Date of Patent: June 13, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Junichi Imuta, Takashi Ueda
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Patent number: 5424104Abstract: Disclosed is a thermoplastic resin composition comprising(A) an aromatic polyamide comprisingdicarboxylic acid units comprising 50-100 mol % of units derived from terephthalic acid, and 0-50 mol % of units derived from an aromatic dicarboxylic acid other than terephthalic acid and/or an aliphatic-dicarboxylic acid having 4-20 carbon atoms, anddiamine units derived from an aliphatic diamine and/or an alicyclic diamine,said aromatic polyamide having an intrinsic viscosity of 0.5-3.0 dl/g as measured in conc. sulfuric acid at 30.degree. C. and a melting point of higher than 300.degree. C.,(B) a graft modified .alpha.-olefin polymer, and/or a graft modified aromatic vinyl hydrocarbon/conjugated diene copolymer or hydrogenated product thereof, and(C) an aliphatic polyamide,wherein said thermoplastic resin composition comprises 10-80 parts by weight of the graft modified .alpha.Type: GrantFiled: January 7, 1994Date of Patent: June 13, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yoshikatsu Amimoto, Fumitoshi Ikejiri, Sanehiro Yamamoto, Akinori Toyota, Katunari Nishimura, Masahiro Kanda, Tetsuo Kato
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Patent number: 5423133Abstract: Disclosed is a drying hopper comprising, disposed in its lower position, a cone portion having diameters gradually decreasing toward a lower end thereof, in which a high temperature gas is injected toward powder descending in the cone portion to thereby dry the powder, wherein said drying hopper comprises a cone portion 11 having a slant, circular wall, said cone portion 11 having a plurality of vertically spaced rows of nozzles 20, formed through the circular wall, disposed at predetermined intervals in a circumferential direction of the circular wall; a plurality of vertically spaced ring-like shells 21 fluidtightly attached to an external surface of the circular wall of the cone portion 11 with interstices therebetween in positions such that said plurality of rows of nozzles 20 are respectively, at gas inlets thereof, covered by said plurality of ring-like shells 21; and a plurality of gas feed pipes 22 respectively connected to said plurality of ring-like shells 21 in communicating relationship.Type: GrantFiled: May 14, 1993Date of Patent: June 13, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yoshiaki Annen, Akira Tsuzaki, Isao Shizuma, Takao Uetake, Mitsunori Ichimura
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Patent number: 5424135Abstract: According to the present invention, there is provided a thermoplastic elastomer laminate which comprisesa layer comprising a thermoplastic elastomer (A) composed of a crystalline polyolefin and a rubber, anda layer comprising an ultra-high molecular weight polyolefin (B) or an ultra-high molecular weight polyolefin composition.In addition, a glass run channel composed of the thermoplastic elastomer laminate is also provided in the invention.Type: GrantFiled: July 25, 1994Date of Patent: June 13, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Kazuhiko Murata, Norishige Murakami, Kyooji Muraoka, Noboru Sakamaki
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Patent number: 5422401Abstract: A modified .alpha.-olefin polymer whose side chain has tertiary carbon, obtained by melt-reacting 100 parts by weight of (A) an .alpha.-olefin polymer whose side chain has tertiary carbon with (B) 0.05 to 10 parts by weight of metal methacrylate or metal acrylate of the formula (1), ##STR1## wherein R is a hydrogen atom or a methyl group, M is a metal cation, X is an anion, m is an integer of at least 2, and n is an integer of at least 2, with a proviso of m.gtoreq.n; and a stretched film thereof.Type: GrantFiled: March 17, 1994Date of Patent: June 6, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Kojiro Kan, Katsumi Noritomi
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Patent number: 5422039Abstract: Disclosed is a liquid crystal material represented by the following formula [I]:R--X--A.sup.1 --Y.sup.1 --A.sup.2 --(Y.sup.2 --A.sup.3).sub.n --Z--R*[I]wherein R is an alkyl or polyfluoroalkyl group; X is a group such as --COO--, or a single bond; n is 0 or 1; A.sup.1, A.sup.2 and A.sup.3 are each a cyclic group such as tetralin, and at least one of them has an optically active group; Y.sup.1 and Y.sup.2 are each a group such as --COO--; Z is a group such as --O--, or a single bond; and R* is an optically active group. Also disclosed are a liquid crystal composition comprising the liquid crystal material represented by the above formula, and a liquid crystal element in which the liquid crystal material is used. The liquid crystal material of the invention shows excellent liquid crystal characteristics because it has at least two optically active groups.Type: GrantFiled: March 25, 1994Date of Patent: June 6, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Junichi Kawabata, Shinichi Nishiyama
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Patent number: 5421064Abstract: An object of the present invention is to provide a dispersing device which can disperse filaments uniformly and widely on a moving collector surface by suppressing the turbulence of an air flow as a carrier medium for the filaments to thereby reduce the disturbance of the filaments.The dispersing device (1) of the present invention is formed as a dispersing pipe consisting of a pair of dispersing plates (2) vertically extending so as to be opposed to each other and a pair of side plates (3) connecting the dispersing plates. The dispersing pipe has an upper end formed with a filaments inlet and a lower end formed with an oblong filaments outlet (5) surrounded by the dispersing plates and the side plates. The dispersing pipe has a shape such that a space t between the dispersing plates is decreased with an increase in distance z from the filaments inlet toward the filaments outlet (5), and that a space w between the side plates is increased with the increase in the distance z.Type: GrantFiled: November 19, 1993Date of Patent: June 6, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiroshi Ishii, Katsuya Hata, Yoshinori Kobayashi
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Patent number: 5417561Abstract: Apparatus for the manufacture of an ultra-high molecular weight polyethylene thin-wall pipe which is uniform in thickness and free from a folded mark. The ultra-high molecular weight polyethylene thin-wall pipe is manufactured by supplying ultra-high molecular weight polyethylene into and melting and kneading, continuously extruding the molten substance of the ultra-high molecular weight polyethylene from a die connected to a screw of the screw extruder to form a cylindrical roughly shaped article, and diametrically expanding the cylindrical roughly extruded article by a tapered core and taking up.Type: GrantFiled: December 8, 1993Date of Patent: May 23, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Takeshi Shiraki, Iwatosi Suzuki, Kunie Hiroshige
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Patent number: 5416151Abstract: A polymer composition substantially comprising(A) 5 to 40 weight parts of a 1-butenic polymer,(B) 95 to 60 weight parts of an inorganic filler,(C) a hydrocarbonic oil in an amount of 2 to 20 weight parts per 100 weight parts in total of the above (A) and (B), and(D) a thermoplastic resin other than 1-butenic polymers in an amount of 0 to 20 weight parts per 100 weight parts in total of the above (A) and (B).Type: GrantFiled: September 20, 1993Date of Patent: May 16, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Haruhiko Tanaka