Patents Assigned to Polychem Corporation
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Publication number: 20030054952Abstract: A component of a catalyst for polymerizing an olefin, comprises: a carrier containing an inorganic oxide selected from silica, alumina, zirconia and titania and having a crushing strength of 0.5 to 25 MPa; and at least one member selected from oxides or hydroxides of metals of the groups 2, 3, 4, 13 and 14 in the periodic table, the metals being different from the metal constituting the inorganic oxide in the carrier, wherein the at least one member is supported on the surface of the carrier, so as to provide a novel catalyst component suitable for particle polymerization of an olefin and enabling to easily change molecular weight distribution of the resultant polymer.Type: ApplicationFiled: April 4, 2002Publication date: March 20, 2003Applicant: Japan Polychem CorporationInventor: Tadashi Takahashi
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Patent number: 6531552Abstract: An olefin polymerization catalyst comprising the following components (A) and (B): Component (A): an ion-exchange layered silicate having an acid site of at most −8.2 pKa, the amount of the acid site is equivalent to at least 0.05 mmol/g of 2,6-dimethylpyridine consumed for neutralization; and Component (B): a compound of a transition metal belonging to Group 3 to Group 12 of the Periodic Table.Type: GrantFiled: January 10, 2001Date of Patent: March 11, 2003Assignee: Japan Polychem CorporationInventors: Hiroshi Nakano, Takao Tayano, Hideshi Uchino, Tadashi Takahashi
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Patent number: 6509426Abstract: Disclosed are a novel transition metal compound represented by the following general formula (I), a catalyst component for olefin polymerization comprising same, a catalyst for olefin polymerization comprising said catalyst component, and a process for the preparation of an a-olefin polymer: where the definition of formula (I) is described in the specification.Type: GrantFiled: February 5, 2001Date of Patent: January 21, 2003Assignee: Japan Polychem CorporationInventors: Taku Kato, Sugio Nishimura, Toshihiko Sugano
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Patent number: 6469100Abstract: A block copolymer is provided comprising one or more blocks of a propylene polymer (PP) and one or more blocks of an ethylene-propylene copolymer (EPR) having the properties: (1) the interface thickness of the PP block with EPR block is from 20-1000 nm; (2) the weight average molecular weight of the PP block is 10,000-1,000,000; (3) the proportion of mesopentad chain in the PP block is not less than 95%; (4) the particle diameter of the disperse phase in EPR block is 0.2-3 microns; (5) the weight average molecular weight of the EPR block is 50,000-1000,000; (6) the propylene content in the EPR block is 20-80 mole %; (7) the composition fluctuation in molecular weight in EPR block is within +/−5% from the average composition.Type: GrantFiled: June 4, 1999Date of Patent: October 22, 2002Assignee: Japan Polychem CorporationInventors: Toru Suzuki, Toshihiko Sugano, Hironari Sano, Motohiro Seki, Takao Tayano, Hiroshi Nakano
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Patent number: 6410648Abstract: A tacky film is provided which is self-tacky, has a satisfactory tack strength when adhered to itself, can have any desired tack strength, and has satisfactory blocking resistance. In particular, a tacky film suitable for use as a tacky layer of a pallet stretch film is provided. A tacky film comprising a linear low-density polyethylene having an MFR of from 0.1 to 10 g/10 min and a density of from 0.884 to 0.910 g/cm3; or a tacky film comprising a polyethylene resin composition which is a resin composition obtained by blending ingredient A [a linear low-density polyethylene having an MFR of from 0.1 to 10 g/10 min and a density of from 0.890 to 0.940 g/cm3] with ingredient B [a linear low-density polyethylene having an MFR of from 0.1 to 50 g/10 min and giving, in differential scanning calorimetry (DSC), a melting peak whose extrapolated melting termination temperature is 98° C. or lower] and which has an ingredient B content of 80% by weight or lower and a density of from 0.884 to 0.Type: GrantFiled: August 24, 2000Date of Patent: June 25, 2002Assignee: Japan Polychem CorporationInventors: Yoshihiko Sasaki, Kazutoshi Takenaka
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Patent number: 6403691Abstract: Disclosed is a high-concentration talc masterbatch comprising: (A) 10 to 60 parts by weight of an elastomer having a melt flow rate of from 0.5 to 150 g/10 min; (B) 40 to 90 parts by weight of talc having an average particle diameter of from 1 to 15 &mgr;m; and (C) 0.01 to 5 parts by weight of a metal soap, based on 100 parts by weight of the sum of the ingredients (A) and (B).Type: GrantFiled: March 20, 2000Date of Patent: June 11, 2002Assignee: Japan Polychem CorporationInventors: Yukihito Zanka, Yoshihiro Banno
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Publication number: 20020064611Abstract: A resin composition for heat-shrinkable polypropylene shrink label, comprises: from 50 to 95% by weight of a crystalline propylene-&agr;-olefin random copolymer mainly comprising propylene, the copolymer satisfying the following requirements (1) to (3); and from 5 to 50% by weight of an alicyclic hydrocarbon resin having a softening temperature of not lower than 110° C.Type: ApplicationFiled: August 13, 2001Publication date: May 30, 2002Applicant: JAPAN POLYCHEM CORPORATIONInventors: Gen Kanai, Takao Tayano, Tadashi Sezume
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Patent number: 6376416Abstract: The present invention provides a method of making a catalyst with the following components: Component (A): A solid catalyst component comprising the following component (A-1) and component (A-2). Component (A-1): A solid component obtained by contacting the following component (A-1-1), component (A-1-2) and component (A-1-3).Type: GrantFiled: July 21, 1999Date of Patent: April 23, 2002Assignee: Japan Polychem CorporationInventors: Katsumi Hirakawa, Yumito Uehara
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Publication number: 20020041972Abstract: A propylene type resin composition comprising from 95.0 to 99.999 parts by weight of component (A) which is a propylene/a-olefin random copolymer polymerized by a metallocene catalyst, and from 0.001 to 5.Type: ApplicationFiled: July 12, 2001Publication date: April 11, 2002Applicant: Japan Polychem CorporationInventors: Yasunori Nakamura, Takao Tayano, Tadashi Sezume
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Patent number: 6353063Abstract: A process for producing a polyolefin in the presence of a transition metal-containing metallocene catalyst that maintains stable operation for long periods of time without suffering from adhesion of the produced polymer to the wall of a reactor or formation of a sheet-like polymer or a massive polymer. The process utilizes a transition metal-containing metallocene catalyst and an organoaluminum compound represented by formula: R1nAl(OR2)3−n, wherein R1 represents a C1-20 alkyl group, an aryl group, hydrogen or halogen; R2 represents a C1-20 alkyl group or an aryl group; and n is a number selected from 0≦n<3, under conditions such that the temperature of the wall of a polymerization reactor, Tw (° C.), and the polymerization temperature, Tr (° C.), satisfy the relationship: 0.5<Tr−Tw<10.Type: GrantFiled: March 24, 2000Date of Patent: March 5, 2002Assignee: Japan Polychem CorporationInventors: Masafumi Shimizu, Yoshiyuki Ishihama, Akihira Watanabe
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Publication number: 20020004447Abstract: An olefin polymerization catalyst comprising the following components (A) and (B):Type: ApplicationFiled: January 10, 2001Publication date: January 10, 2002Applicant: Japan Polychem CorporationInventors: Hiroshi Nakano, Takao Tayano, Hideshi Uchino, Tadashi Takahashi
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Patent number: 6294266Abstract: In laminates prepared by laminating a base material and sandwich base material via a bonding layer, the adhesion strength between the sandwich base material and bonding layer is not less than 200 g/15 mm wide at 23 ° C. and the bonding layer is formed of a resin composition which comprises an ethylene/ &agr;-olefin copolymer resin, thus to provide useful laminates which are very excellent in adhesion properties to metal foil, deposited metal surfaces of metal-deposited films, and surfaces of other sandwich base materials and in tear properties such as unsealing properties, and have low smell and high strength as packaging films.Type: GrantFiled: April 8, 1998Date of Patent: September 25, 2001Assignee: Japan Polychem CorporationInventors: Yoshinori Hashimoto, Takashi Yamashita
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Publication number: 20010023296Abstract: Disclosed are a novel transition metal compound represented by the following general formula (I), a catalyst component for olefin polymerization comprising same, a catalyst for olefin polymerization comprising said catalyst component, and a process for the preparation of an a-olefin polymer: 1Type: ApplicationFiled: February 5, 2001Publication date: September 20, 2001Applicant: JAPAN POLYCHEM CORPORATIONInventors: Taku Kato, Sugio Nishimura, Toshihiko Sugano
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Patent number: 6279752Abstract: A waste water treatment system for removing sludge from within a rectangular clarifying tank having a plurality of sludge collector flights attached to a pair of parallel chains for collecting sludge and scum within the waste water. Each of the collector flights includes a non-metallic elongated main body portion having spaced top and bottom walls connected by spaced front and rear walls for defining a hollow, interior cavity. Buoyant foam material is disposed within the interior cavity for increasing the buoyancy of the collector flight. The waste water treatment system further includes plastic bull and drive sprockets mounted to a drive shaft running across the width of the tank, and a chain drive assembly for driving a pair of parallel drive chains attached to the drive sprockets. The drive assembly causes rotation of a drive shaft through a chain link attachment to the bull sprocket.Type: GrantFiled: April 14, 2000Date of Patent: August 28, 2001Assignee: Polychem CorporationInventor: Joseph R. Hannum
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Patent number: 6251510Abstract: There is provided a process for preparing a resin sheet for thermoforming which can be fabricated into containers and lids or caps for containers in the food packaging industries, particularly those which are resistant to heating in a microwave oven, which containers and lids or caps are excellent in transparency, antifog property, impact resistance, and heat resistance are obtained. A process for preparing an antifogged sheet comprising a propylene resin sheet with an antifogging agent comprising a polyglycerol fatty acid ester or a sucrose fatty acid ester as an effective ingredient.Type: GrantFiled: March 26, 1998Date of Patent: June 26, 2001Assignee: Japan Polychem CorporationInventors: Yoshinobu Nagaoka, Akihiko Egashira, Kazumasa Fujimura, Toshimitsu Hasegawa, Tomokazu Hirose, Hiroshi Kuzui, Toru Tagawa
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Patent number: 6228951Abstract: Disclosed is a polypropylene molding material obtained by the reaction of a crystalline polypropylene resin and a peroxide, said polypropylene molding material having (A) a melt flow rate of 20 to 100 g/10 min and a weight average molecular weight to number average molecular weight ratio of 1.5 to 3.5 as measured by gel-permeation chromatography, (B) a content of hydrocarbons having 20 to 70 carbon atoms of 0.05% by weight or less, (C) a mean elution temperature (T50) of 75 to 120° C. and a degree of variation of elution (&sgr;) of 9 or smaller, and (D) a Q2/Q1 ratio of 0.75 to 0.95, wherein Q1 is a weight average molecular weight to number average molecular weight ratio of said crystalline polypropylene resin as measured by gel-permeation chromatography, and Q2 is a weight average molecular weight to number average molecular weight ratio of said propylene molding material as measured by gel-permeation chromatography.Type: GrantFiled: August 23, 1999Date of Patent: May 8, 2001Assignee: Japan Polychem CorporationInventors: Yoshifumi Hirota, Tadashi Sezume
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Patent number: 6218558Abstract: Disclosed are a novel transition metal compound represented by the following general formula (I), a catalyst component for olefin polymerization comprising same, a catalyst for olefin polymerization comprising said catalyst component, and a process for the preparation of an &agr;-olefin polymer: where the definition of formula (I) is described in the specification.Type: GrantFiled: June 8, 1999Date of Patent: April 17, 2001Assignee: Japan Polychem CorporationInventors: Taku Kato, Sugio Nishimura, Toshihiko Sugano
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Patent number: 6180709Abstract: There is provided a thermoplastic resin composition comprising the following components (A) to (E): component (A): 50 to 74.7% by weight of a Ziegler-Natta catalyst sequentially polymerized blend of a propylene homopolymer and an ethylene-propylene copolymer, component (B): 5 to 10% by weight of an ethylene-octene random copolymer, component (C): 5 to 10% by weight of an ethylene-butene random copolymer, component (D): 0.3 to 5% by weight of an elastomer.Type: GrantFiled: May 15, 1998Date of Patent: January 30, 2001Assignees: Japan Polychem Corporation, Toyota Jidosha Kabushiki KaishaInventors: Takeyoshi Nishio, Takayuki Nagai, Hisayuki Iwai, Yukihito Zanka, Izumi Ishii, Hiroki Satoh, Yoshihiro Sobajima, Mitsuhiro Murayama
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Patent number: 6156836Abstract: This invention provides polypropylene resin compositions which have sharply improved balance of physical properties in comparison with the related polypropylene materials, are materials that can be used in both interior and exterior parts of automobiles, have excellent thin-wall moldability and can sharply reduce generation of flow marks. Particularly, it provides a polypropylene resin composition which comprises specified amounts of (A) a specified ethylene-propylene block copolymer, (B) a specified thermoplastic elastomer and (C) talc, wherein it has specified values of physical properties measured by ASTM and has a degree of b-axis orientation of 720 or more which is calculated from the ratio of differential peak intensities measured by wide-angle X-ray diffraction of the central area of an ASTM No. 1 dumbbell prepared by injection molding.Type: GrantFiled: December 24, 1998Date of Patent: December 5, 2000Assignees: Japan Polychem Corporation, Toyota Jidosha Kabushiki KaishaInventors: Kunio Iwanami, Akira Kobayashi, Mitsuhiro Murayama, Yuji Fujita, Takayuki Nagai, Takao Nomura, Masatoshi Matsuda, Osamu Kito, Hisayuki Iwai
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Patent number: 6143813Abstract: Propylene resin composition containing propylene-.alpha.-olefin random copolymer, nucleating agent and spherical magnesium silicate particles. Stretched films.Type: GrantFiled: March 24, 1999Date of Patent: November 7, 2000Assignee: Japan Polychem CorporationInventors: Tadashi Sezume, Yasunori Nakamura