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公开(公告)号：JPH10279743A
公开(公告)日：1998-10-20
申请号：JP9696198
申请日：1998-03-26
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： KUPPERBLATT SANDRA A , TILSTON MICHAEL W , EALER GEORGE E
Abstract: PROBLEM TO BE SOLVED: To obtain a high strength polyethylene film extruded from a blended material consisting of copolyethylenes. SOLUTION: This high strength polyethylene film consists of a blended material consisting of 2 kinds of ethylene/α-olefin copolymers having approximately 5-50 g/10 min range flow index, approximately 10-50 range melt flow rate, 0.900-0.940 g/cm density, approximately 98,000 190,000 range molecular weight and approximately 2-8 range Mw/Mn. The blended material is produced by mixing a first copolymer and a second copolymer both having almost similar molecular weights. Each copolymer is a copolymer of ethylene with a 3-8C α-olefin and the copolymers having the above characteristics in prescribed ranges are used.
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公开(公告)号：ES2328753T3
公开(公告)日：2009-11-17
申请号：ES98302388
申请日：1998-03-27
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： KUPPERBLAT SANDRA A , TILSTON MICHAEL W , EALER GEORGE E
Abstract: UNA COMPUESTO QUE COMPRENDE UNA MEZCLA DE DOS COPOLIMEROS DE ALFA-OLEFINAS DE ETILENO, DICHO COMPUESTO TIENE UN INDICE DE FLUIDEZ DE 5 A 50 GRAMOS POR 10 MINUTOS; UNA TASA DE FLUIDEZ EN FUNDIDO DE 10 A 50; UNA DENSIDAD DE 0,900 A 0,940 GRAMOS POR CENTIMETRO CUBICO, UN PESO MOLECULAR MEDIO DE 98,00 A 190,00; Y UNA RELACION MW/MN DE 2 A 8; DICHO COMPUESTO SE OBTIENE MEZCLANDO EL PRIMER Y SEGUNDO COPOLIMEROS QUE TIENEN PESOS MOLECULARES APROXIMADAMENTE IGUALES, SIENDO CADA COPOLIMERO UN COPOLIMERO DE ETILENO Y DE UNA ALFA-OLEFINA CON 3 A 8 ATOMOS DE CARBONO, TENIENDO EL PRIMER COPOLIMERO UN INDICE DE FLUJO DE 5 A 75 GRAMOS POR 10 MINUTOS, UNA TASA DE FLUJO EN FUNDIDO DE 10 A 50, UNA DENSIDAD DE 0,860 A 0,930 GRAMOS POR CENTIMETRO CUBICO, UN PESO MOLECULAR MEDIO DE 87,00 A 190,00, Y UNA RELACION MW/MN DE 2 A 4; Y TENIENDO EL SEGUNDO POLIMERO UN INDICE DE FLUJO DE 5 A 75 GRAMOS POR 10 MINUTOS, UN INDICE DE FLUJO EN FUNDIDO DE 10 A 50, UNA DENSIDAD DE 0,935 A 0,970 GRAMOS POR CENTIMETRO CUBICO, UN PESO MOLECULAR MEDIO DE 87,00 A 190,00, Y UNA RELACION MW/MN DE 2 A 4, SIENDO LA RELACION EN PESO CON EL PRIMER COPOLIMERO DE 70:30 A 30:70.
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公开(公告)号：AT439404T
公开(公告)日：2009-08-15
申请号：AT98302388
申请日：1998-03-27
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： KUPPERBLAT SANDRA A , TILSTON MICHAEL W , EALER GEORGE E
Abstract: A blend comprises two ethylene alpha -olefin copolymers. The blend has: (i) a flow index (FI) the range of about 5 to about 50 g \ 10 minutes; (ii) a melt flow ratio (MFR) = 10 to about 50; (iii) density = 0.900 to 0.940 g cm -3; (iv) a weight average molecular weight (MW) = 98,000 to about 190.000; (v) and an Mw/Mn = 2 to about 8. Each copolymer being a copolymer of ethylene and an alpha -olefin of 3C to 8C. The first copolymer has: (i) FI = 5 to about 75 g \ 10 minutes; (ii) MFR 10 to about 50; (iii) a density = 0.860 to 0.930 g cm-3;(iv) a weight average MW = 87,000 to about 190.000; and (v) an Mw/Mn ratio = 2 to about 4 and the second copolymer has (i) FI = 5 to about 75 g \ 10 minutes; (ii) MFR = 10 to about 50; (iii) a density = 0.935 to 0.970 g cm-3; (iv) MW = 87,000 to about 190,000; and (v) Mw/Mn ratio = 2 to about 4, the weight ratio of the first copolymer to the second copolymer = 70:30 to about 30:70. Also claimed is the preparation of the blend.
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公开(公告)号：CA2233403A1
公开(公告)日：1998-09-28
申请号：CA2233403
申请日：1998-03-26
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： KUPPERBLAT SANDRA A , TILSTON MICHAEL W , EALER GEORGE E
Abstract: A blend comprising a mixture of two ethylene/alpha-olefin copolymers, said blend having a flow index in the range of about 5 to about 50 grams per 10 minutes; a melt flow ratio in the range of about 10 to about 50; a density in the range of 0.900 to 0.940 gram per cubic centimeter; a molecular weight in the range of about 98,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 8, said blend having been prepared by mixing first and second copolymers having about equal molecular weights, each copolymer being a copolymer of ethylene and an alpha-olefin having 3 to 8 carbon atoms, the first copolymer having a flow index in the range of about 6 to about 75 grams per 10 minutes; a melt flow ratio in the range of about 10 to about 60; a density in the range of 0.860 to 0.930 gram per cubic centimeter; a molecular weight in the range of about 87,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 4 and the second copolymer having a flow index in the range of about 5 to about 75 grams per 10 minutes; a melt flow ration in the range of about 10 to about 50; a density in the range of 0.935 to 0.970 gram per cubic centimeter; a molecular weight in the range of about 87,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 4, the weight ratio of the first copolymer to the second copolymer being in the range of about 70:30 to about 30:70.
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公开(公告)号：DE69841051D1
公开(公告)日：2009-09-24
申请号：DE69841051
申请日：1998-03-27
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： KUPPERBLAT SANDRA A , TILSTON MICHAEL W , EALER GEORGE E
Abstract: A blend comprises two ethylene alpha -olefin copolymers. The blend has: (i) a flow index (FI) the range of about 5 to about 50 g \ 10 minutes; (ii) a melt flow ratio (MFR) = 10 to about 50; (iii) density = 0.900 to 0.940 g cm -3; (iv) a weight average molecular weight (MW) = 98,000 to about 190.000; (v) and an Mw/Mn = 2 to about 8. Each copolymer being a copolymer of ethylene and an alpha -olefin of 3C to 8C. The first copolymer has: (i) FI = 5 to about 75 g \ 10 minutes; (ii) MFR 10 to about 50; (iii) a density = 0.860 to 0.930 g cm-3;(iv) a weight average MW = 87,000 to about 190.000; and (v) an Mw/Mn ratio = 2 to about 4 and the second copolymer has (i) FI = 5 to about 75 g \ 10 minutes; (ii) MFR = 10 to about 50; (iii) a density = 0.935 to 0.970 g cm-3; (iv) MW = 87,000 to about 190,000; and (v) Mw/Mn ratio = 2 to about 4, the weight ratio of the first copolymer to the second copolymer = 70:30 to about 30:70. Also claimed is the preparation of the blend.
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Patent Agency Ranking
公开(公告)号：CA2141474A1
公开(公告)日：1996-01-07
申请号：CA2141474
申请日：1995-01-31
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： DANIELL PAUL T , TILSTON MICHAEL W , SPRIGGS THOMAS E , WAGNER BURKHARD E , RAMAMURTHY ARAKALGUD V
IPC: C08J5/18 , C08F2/00 , C08F2/34 , C08F4/60 , C08F4/654 , C08F10/00 , C08F210/02 , C08F297/08 , C08L23/08 , C08L23/16 , C08F210/16 , C08F4/646
Abstract: A gas phase process for the production of a polyethylene blend comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system including an activator and a cocatalyst in each of two fluidized bed reactors connected in series, under polymerization conditions, with the provisos that: (a) the mixture of ethylene copolymer matrix and active catalyst formed in the first reactor in the series is transferred to the second reactor in the series; (b) other than the active catalyst referred to in proviso (a) and the cocatalyst referred to in proviso (e), no additional catalyst is introduced into the second reactor; (c) in the first reactor in which a low melt index copolymer is made: (1) the alpha-olefin is present in a ratio of about 0.01 to about 0.4 mole of alpha-olefin per mole of ethylene; (2) optionally, hydrogen is present in a ratio of about 0.001 to about 0.3 moles of hydrogen per mole of ethylene; and (3) the ethylene partial pressure is at least about 40 pounds per square inch; and (d) in the second reactor in which a high melt index copolymer is made: (1) the alpha-olefin is present in a ratio of about 0.01 to about 0.6 mole of alpha-olefin per mole of ethylene; (2) hydrogen is present in a ratio of about 1 to about 2.5 moles of hydrogen per mole of ethylene; and (3) diethyl zinc is added in an amount of about 2 to about 40 moles of diethyl zinc per mole of titanium; and (e) additional hydrocarbyl aluminum cocatalyst is introduced into the second reactor in an amount sufficient to restore the level of activity of the catalyst transferred from the first reactor to about the initial level of activity in the first reactor.
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公开(公告)号：CA2233403C
公开(公告)日：2002-04-16
申请号：CA2233403
申请日：1998-03-26
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： EALER GEORGE E , KUPPERBLATT SANDRA ANN , TILSTON MICHAEL W
Abstract: A blend comprising a mixture of two ethylene/alpha-olefin copolymers, said blend having a flow index in the range of about 5 to about 50 grams per 10 minutes; a melt flow ratio in the range of about 10 to about 50; a density in the range of 0.900 to 0.940 gram per cubic centimeter; a molecular weight in the range of about 98,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 8, said blend having been prepared by mixing first and second copolymers having about equal molecular weights, each copolymer being a copolymer of ethylene and an alpha-olefin having 3 to 8 carbon atoms, the first copolymer having a flow index in the range of about 6 to about 75 grams per 10 minutes; a melt flow ratio in the range of about 10 to about 60; a density in the range of 0.860 to 0.930 gram per cubic centimeter; a molecular weight in the range of about 87,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 4 and the second copolymer having a flow index in the range of about 5 to about 75 grams per 10 minutes; a melt flow ration in the range of about 10 to about 50; a density in the range of 0.935 to 0.970 gram per cubic centimeter; a molecular weight in the range of about 87,000 to about 190,000; and an Mw/Mn ratio in the range of about 2 to about 4, the weight ratio of the firstcopolymer to the second copolymer being in the range of about 70:30 to about 30:70.
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公开(公告)号：AU9115201A
公开(公告)日：2002-04-02
申请号：AU9115201
申请日：2001-09-21
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： TILSTON MICHAEL W , MAHESHWARI VINAYAK , DAVIS MARK BRADLEY
IPC: C08F2/00 , C08F4/602 , C08F4/646 , C08F4/659 , C08F4/6592 , C08F10/00 , C08F110/02
Abstract: Bimodal resin products are produced in a single reactor by using two bicomponent catalyst compositions, each having a high molecular weight and a low molecular weight component, in different ratios. The HMW/LMW split of the final resin product is controlled accurately by controlling the ratio of the feed of the two bicomponent catalyst compositions. Bimodal or polymodal effects are also achieved for properties or characteristics other than molecular weight. More complex results can be achieved with more than two components. The invention is applicable to a wide variety of polymer products, particularly polyolefins and polyethylene.
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公开(公告)号：ID28102A
公开(公告)日：2001-05-03
申请号：ID20010535
申请日：1998-09-11
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： TILSTON MICHAEL W , UPHAM STEPHANIE MARIE , MICHIE WILLIAM J , EALER GEORGE EDWARD , BUHLER-VIDAL JORGE OSCAR
IPC: C08L23/08
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公开(公告)号：AU5393798A
公开(公告)日：1998-10-01
申请号：AU5393798
申请日：1998-02-13
Applicant: UNION CARBIDE CHEM PLASTIC
Inventor： KUPPERBLAT SANDRA A , TILSTON MICHAEL W , EALER GEORGE E
Abstract: A blend comprises two ethylene alpha -olefin copolymers. The blend has: (i) a flow index (FI) the range of about 5 to about 50 g \ 10 minutes; (ii) a melt flow ratio (MFR) = 10 to about 50; (iii) density = 0.900 to 0.940 g cm -3; (iv) a weight average molecular weight (MW) = 98,000 to about 190.000; (v) and an Mw/Mn = 2 to about 8. Each copolymer being a copolymer of ethylene and an alpha -olefin of 3C to 8C. The first copolymer has: (i) FI = 5 to about 75 g \ 10 minutes; (ii) MFR 10 to about 50; (iii) a density = 0.860 to 0.930 g cm-3;(iv) a weight average MW = 87,000 to about 190.000; and (v) an Mw/Mn ratio = 2 to about 4 and the second copolymer has (i) FI = 5 to about 75 g \ 10 minutes; (ii) MFR = 10 to about 50; (iii) a density = 0.935 to 0.970 g cm-3; (iv) MW = 87,000 to about 190,000; and (v) Mw/Mn ratio = 2 to about 4, the weight ratio of the first copolymer to the second copolymer = 70:30 to about 30:70. Also claimed is the preparation of the blend.
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