Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
  • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65908—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65916—Component covered by group C08F4/64 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
  • C08F4/65922—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
  • C08F4/65925—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not two cyclopentadienyl rings being mutually non-bridged

Definitions

• the present invention relates to a process utilizing a metallocene catalyst for the polymerization of olefins having narrowed molecular weight distribution 10 (MWD) values. Additionally, this invention relates to novel polyolefins, and films and articles of manufacture produced therefrom.
• MWD molecular weight distribution 10
• Polyolefins are well known in the art.
• polyethylene and interpolymers of ethylene are well known and are useful in many applications.
• interpolymers of ethylene also known as copolymers, terpolymers, and the like of ethylene, possess properties which distinguish them from other polyethylene polymers, such as branched ethylene homopolymers commonly
• LDPE low density polyethylene
• a particularly useful polymerization medium for producing polymers and interpolymers of olefins such as ethylene is a gas phase process. Examples of such are given in U.S. Patent Nos. 3,709,853; 4,003,712; 4,011,382; 4,302,566;
• Metallocene catalysts are known for polymerizing and interpolymerizing olefins such as ethylene.
• Metallocene catalysts comprise at least one transition metal component having at least one moiety selected from substituted or unsubstituted cyclopentadienyl, substituted or unsubstituted pentadienyl, substituted or unsubstituted pyrrole, substituted or unsubstituted phosphole, substituted or unsubstituted arsole, substituted or unsubstituted boratabenzene, and substituted or unsubstituted carborane, and at least one co-catalyst component.
• Typical organometallic co-catalysts are alkyl aluminoxanes, such as methyl aluminoxane, and boron containing compounds such as tris(perfluorophenyl)boron and salts of tetrakis(perfluorophenyl)borate.
• the metallocene catalysts can be supported on an inert porous particulate carrier.
• the process of the present invention comprises polymerizing at least one olefin in the presence of at least one metallocene catalyst comprising at least one transition metal component having at least one moiety selected from substituted or unsubstituted cyclopentadienyl, substituted or unsubstituted pentadienyl, substituted or unsubstituted pyrrole, substituted or unsubstituted phosphole, substituted or unsubstituted arsole, substituted or unsubstituted boratabenzene, and substituted or unsubstituted carborane, and at least one co-catalyst component, and a sufficient amount of at least one specified compound to obtain an olefin homopolymer or interpolymer having a narrower molecular weight distribution than an olefin homopolymer or interpolymer having a molecular weight distribution greater than two obtained in the absence of the added compound.
• the specified compound added to the polymerization process is selected from the
• An oxide or imide of carbon of formula CE or C 3 E 2 where E O and NR, R is hydrogen, a halogen, an alkyl group containing up to 50 non-hydrogen atoms, an aryl group containing up to 50 non- hydrogen atoms, a silyl group containing up to 50 non-hydrogen atoms, an alkoxy group containing up to 50 non-hydrogen atoms, an amino group containing up to 50 non-hydrogen atoms, a thiolato group containing up to 50 non-hydrogen atoms, or a boryl group containing up to 50 non-hydrogen atoms;
• a chalcogenyl halide or imidohalide of carbon, silicon, germanium, tin and lead of the formula C(E)X where E O, S, Se, Te, and NR; R is hydrogen, a halogen, an alkyl group containing up to 50 non- hydrogen atoms, an aryl group containing up to 50 non-hydrogen atoms, a silyl group containing up to 50 non-hydrogen atoms, or a boryl group containing up to 50 non-hydrogen atoms; and X is a halogen;
• a compound containing one or more chalcogens and one or more halogens of formula E n X m where E O, S, Se, and Te;
• X is hydrogen, a halogen, an alkyl group containing up to 50 non- hydrogen atoms, an aryl group containing up to 50 non-hydrogen atoms, a silyl group containing up to 50 non-hydrogen atoms, an alkoxy group containing up to 50 non-hydrogen atoms, an amino group containing up to 50 non-hydrogen atoms, a thiolato group containing up to 50 non-hydrogen atoms, or a boryl group containing up to 50 non-hydrogen atoms; and
• R is hydrogen, a halogen, an alkyl group containing up to 50 non-hydrogen atoms, an aryl group containing up to 50 non-hydrogen atoms, a silyl group containing up to 50 non-hydrogen atoms, an alkoxy group containing up to 50 non- hydrogen atom
• Also provided is a process for narrowing molecular weight distribution of a polymer comprising at least one or more olefm(s) comprising contacting under polymerization conditions, at least one or more olefin(s) with at least one metallocene catalyst comprising at least one transition metal component having at least one moiety selected from substituted or unsubstituted cyclopentadienyl, substituted or unsubstituted pentadienyl, substituted or unsubstituted pyrrole, substituted or unsubstituted phosphole, substituted or unsubstituted arsole, substituted or unsubstituted boratabenzene, and substituted or unsubstituted carborane, and at least one co-catalyst component, and at least one of the specified compounds, wherein the specified compound is present in an amount sufficient that the molecular weight distribution of the resulting polymeric product is narrower than would be obtained in the absence of the specified compound.
• the present invention comprises novel polyolefin hompolymers and copolymers. Further, the present invention comprises films and articles of manufacture produced from the novel polyolefin hompolymers and copolymers.
• the present invention relates to a process for polymerizing at least one olefin in the presence of at least one metallocene catalyst comprising at least one transition metal component having at least one moiety selected from substituted or unsubstituted cyclopentadienyl, substituted or unsubstituted pentadienyl, substituted or unsubstituted pyrrole, substituted or unsubstituted phosphole, substituted or unsubstituted arsole, substituted or unsubstituted boratabenzene, and substituted or unsubstituted carborane, and at least one co-catalyst component, and a sufficient amount of at least one specified compound to obtain a polyolefin homopolymer or copolymer characterized by having a molecular weight distribution (MWD) narrower than an olefin homopolymer or interpolymer having a molecular weight distribution greater than two obtained in the absence of the added compound.
• MWD mo
• the specified are listed
• the polymerization of the at least one olefin herein may be carried out using any suitable process.
• any suitable process for example, there may be utilized polymerization in suspension, in solution or in the gas phase media. All of these polymerization processes are well known in the art.
• a particularly desirable method for producing polyethylene polymers according to the present invention is a gas phase polymerization process. This type process and means for operating the polymerization reactor are well known and completely described in U.S Patents Nos. 3,709,853; 4,003.712; 4,011,382; 4,012,573; 4,302,566; 4,543,399; 4,882,400; 5,352,749; 5,541,270; Canadian Patent No. 991,798 and Belgian Patent No. 839,380.
• the polymerization process of the present invention may be effected as a continuous gas phase process such as a fluid bed process.
• a fluid bed reactor for use in the process of the present invention typically comprises a reaction zone and a so-called velocity reduction zone.
• the reaction zone comprises a bed of growing polymer particles, formed polymer particles and a minor amount of catalyst particles fluidized by the continuous flow of the gaseous monomer and diluent to remove heat of polymerization through the reaction zone.
• some of the recirculated gases may be cooled and compressed to form liquids that increase the heat removal capacity of the circulating gas stream when readmitted to the reaction zone.
• a suitable rate of gas flow may be readily determined by simple experiment. Make up of gaseous monomer to the circulating gas stream is at a rate equal to the rate at which particulate polymer product and monomer associated therewith is withdrawn from the reactor and the composition of the gas passing through the reactor is adjusted to maintain an essentially steady state gaseous composition within the reaction zone.
• the gas leaving the reaction zone is passed to the velocity reduction zone where entrained particles are removed. Finer entrained particles and dust may be removed in a cyclone and/or fine filter.
• the gas is passed through a heat exchanger wherein the heat of polymerization is removed, compressed in a compressor and then returned to the reaction zone.
• the reactor temperature of the fluid bed process herein ranges from about 30°C to about 150°C. In general, the reactor temperature is operated at the highest temperature that is feasible taking into account the sintering temperatures of the polymer product within the reactor.
• the process of the present invention is suitable for the polymerization of at least one or more olefins.
• the olefins may contain from 2 to 16 carbon atoms. Included herein are homopolymers, copolymers, terpolymers, and the like of the olefin monomeric units. Particularly preferred for preparation herein by the process of the present invention are polyethylenes.
• Such polyethylenes are defined as homopolymers of ethylene and interpolymers of ethylene and at least one alpha-olefin wherein the ethylene content is at least about 50% by weight of the total monomers involved.
• alpha-olefins that may be utilized herein are propylene, 1-butene, 1-pentene, 1-hexene, 1- heptene, 1-octene, 4-methyl- 1-pentene, 1-decene, 1-dodecene, 1-hexadecene and the like.
• non-conjugated dienes and olefins formed in situ in the polymerization medium are also utilizable herein.
• the formation of polyethylenes containing long chain branching may occur.
• the polymerization reaction of the present invention is carried out in the presence of at least one metallocene catalyst.
• the catalyst can be introduced in any manner known in the art.
• the catalyst can be introduced directly into the fluidized bed reactor in the form of a solution, a slurry or a dry free flowing powder.
• the catalyst can also be used in the form of a deactivated catalyst, or in the form of a prepolymer obtained by contacting the catalyst with one or more olefins in the presence of a co-catalyst.
• Metallocene catalysts are well known in the industry and are comprised of at least one transition metal component and at least one co-catalyst component.
• the transition metal component of the metallocene catalyst comprises a compound having at least one moiety selected from substituted or unsubstituted cyclopentadienyl, substituted or unsubstituted pentadienyl, substituted or unsubstituted pyrrole, substituted or unsubstituted phosphole, substituted or unsubstituted arsole, substituted or unsubstituted boratabenzene, and substituted or unsubstituted carborane, and at least one transition metal.
• the moiety is a substituted or unsubstituted cyclopentadienyl.
• the transition metal is selected from Groups 3, 4, 5, 6, 7, 8, 9 and 10 of the Periodic Table of the Elements. Exemplary of such transition metals are scandium, titanium, zirconium, hafnium, vanadium, chromium, manganese, iron, cobalt, nickel, and the like, and mixtures thereof. In a preferred embodiment the transition metal is selected from Groups 4, 5 or 6 such as, for example, titanium, zirconium, hafnium, vanadium and chromium, and in a still further preferred embodiment, the transition metal is titanium or zirconium or mixtures thereof.
• the co-catalyst component of the metallocene catalyst can be any compound, or mixtures thereof, that can activate the transition metal component(s)of the metallocene catalyst in olefin polymerization.
• the co-catalyst is an alkylaluminoxane such as, for example, methylaluminoxane (MAO) and aryl substituted boron containing compounds such as, for example, tris(perfluorophenyl)borane and the salts of tetrakis(perfluorophenyl)borate.
• metallocene catalysts are described in U.S. Patent Nos. 4,564,647;
• metallocene catalysts herein also include catalyst systems such as
• the metallocene catalysts herein can be introduced in the process of the present invention in any manner.
• the catalyst components can be introduced directly into the polymerization medium in the form of a solution, a slurry or a dry free flowing powder.
• transition metal component(s) and the co-catalyst component(s) of the metallocene catalyst can be premixed to form an activated catalyst prior to addition to the polymerization medium, or the components can be added separately to the polymerization medium, or the components can be premixed and then contacted with one or more olefins to form a prepolymer and then added to the polymerization medium in prepolymer form.
• any electron donor compound may be added to the catalyst to control the level of activity of the catalyst.
• the carrier can be any particulate organic or inorganic material.
• the carrier particle size should not be larger than about 200 microns in diameter.
• the most preferred particle size of the carrier material can be easily established by experiment.
• the carrier should have an average particle size of 5 to 200 microns in diameter, more preferably 10 to 150 microns and most preferably 20 to 100 microns.
• suitable inorganic carriers include metal oxides, metal hydroxides, metal halogenides or other metal salts, such as sulphates, carbonates, phosphates, nitrates and silicates.
• Exemplary of inorganic carriers suitable for use herein are compounds of metals from Groups 1 and 2 of the Periodic Table of the Elements, such as salts of sodium or potassium and oxides or salts of magnesium or calcium, for instance the chlorides, sulphates, carbonates, phosphates or silicates of sodium, potassium, magnesium or calcium and the oxides or hydroxides of, for instance, magnesium or calcium.
• inorganic oxides such as silica, titania, alumina, zirconia, chromia, boron oxide, silanized silica, silica hydrogels, silica xerogels, silica aerogels, and mixed oxides such as talcs, silica/chromia, silica/chromia/titania, silica/alumina, silica/titania, silica/magnesia, silica/magnesia/titania, aluminum phosphate gels, silica co-gels and the like.
• inorganic oxides such as silica, titania, alumina, zirconia, chromia, boron oxide, silanized silica, silica hydrogels, silica xerogels, silica aerogels, and mixed oxides such as talcs, silica/chromia, silica/chromia/titania, si
• the inorganic oxides may contain small amounts of carbonates, nitrates, sulfates and oxides such as Na 2 CO 3 , K CO 3 , CaCO 3 , MgCO 3 , Na 2 SO 4 , Al 2 (SO 4 ) 3 , BaSO 4 , KNO 3 , Mg(NO 3 ) 2 , Al(NO 3 ) 3 , Na 2 O, K 2 O and Li 2 O.
• Carriers containing at least one component selected from the group consisting of MgCl , SiO 2 , Al 2 O 3 or mixtures thereof as a main component are preferred.
• suitable organic carriers include polymers such as, for example, polyethylene, polypropylene, interpolymers of ethylene and alpha- olefins, polystyrene, functionalized polystyrene, poly amides and polyesters.
• the metallocene catalyst herein may be prepared by any method known in the art.
• the catalyst can be in the form of a solution, a slurry or a dry free flowing powder.
• the amount of metallocene catalyst used is that which is sufficient to allow production of the desired amount of the olefin polymer or interpolymer.
• the co- catalyst(s) is added to the polymerization medium in any amount sufficient to effect production of the desired olefin polymer or interpolymer.
• co-catalyst(s) in a molar ratio of co-catalyst(s) to transition metal component(s) of the metallocene catalyst ranging from about 0.5:1 to about 10000: 1. In a more preferred embodiment, the molar ratio of co-catalyst(s) to transition metal component(s) ranges from about 0.5:1 to about 1000:1.
• any organometallic compound(s) may be added to the polymerization medium in addition to the metallocene catalyst herein.
• the organometallic compounds may be added for many purposes such as catalyst activity modifiers, particle morphology control agents and/or electrostatic charge mediators.
• Preferred for use herein are organoaluminum compounds such as trialkylaluminums, dialkylaluminum halides, alkylaluminum dihalides and alkylaluminum sesquihalides.
• Exemplary of such compounds are trimethylaluminum, triethylaluminum, tri-tt-propylaluminum, tri-n- butylaluminum, triisobutylaluminum, tri-H-hexylaluminum, triisohexylaluminum, tri-2-methylpentylaluminum, tri-n-octylaluminum, tri-n-decylaluminum, dimethylaluminum chloride, diethylaluminum chloride, dibutylaluminum chloride, diisobutylaluminum chloride, diethylaluminum bromide and diethylaluminum iodide, methylaluminum dichloride, ethylaluminum dichloride, butylaluminum dichloride, isobutylaluminum dichloride, ethylaluminum dibromide and ethylaluminum diiodide, methyla
• the at least one or more organometallic compound(s), if utilized, can be added to the polymerization medium in any manner.
• the organometallic compound(s) can be introduced directly into the polymerization medium or premixed with the specified compound prior to addition to the polymerization medium.
• the amount of organometallic compound(s) added to the polymerization medium is any amount that is suitable to achieve the desired purpose.
• the molar ratio of organometallic compound(s) to the specified compound ranges from about 100:1 to about 1:1.
• the polymerization reaction is carried out in the presence of a specified compound selected from the following.
• the specified compound be utilized in an amount that will be sufficient to result in the production of polyolefins characterized by having a molecular weight distribution narrower than polyolefins having a molecular weight distribution greater than two obtained in the absence of utilizing the specified compound in the specified amount.
• CTe(NBEt 2 ); vii) A chalcogenyl halide or imidohalide of carbon, silicon, germanium, tin and lead of the formula C(E)X 2 where E O, S, Se, Te, and NR; R is hydrogen, a halogen, an alkyl group containing up to 50 non- hydrogen atoms, an aryl group containing up to 50 non-hydrogen atoms, a silyl group containing up .to 50 non-hydrogen atoms, or a boryl group containing up to 50 non-hydrogen atoms; and X is a halogen, such as COF 2 , COCl 2 , C 2 O 2 Cl 2 , C 2 O 2 F 2 , GeOCl 2 , C(NCMe 3 )Cl 2 , C(NCl)Br 2 , C 2 O(NSiMe 3 )Cl 2 , C 2 (N-cyclohexyl) 2 Cl 2 , Si(NPh
• An interchalcogen compounds containing at least 2 Group 16 elements
• a compound containing one or more chalcogens and one or more halogens of formula E n X m where E O, S, Se, and Te;
• a Sulfur-Nitrogen compound such as NS, NSC1, S 3 N 2 C1 2 , S 4 N 4 ,
• X is hydrogen, a halogen, an alkyl group containing up to 50 non- hydrogen atoms, an aryl group containing up to 50 non-hydrogen atoms, a silyl group containing up to 50 non-hydrogen atoms, an alkoxy group containing up to 50 non-hydrogen atoms, an amino group containing up to 50 non-hydrogen atoms, a thiolato group containing up to 50 non-hydrogen atoms, or a boryl group containing up to 50 non-hydrogen atoms; and R is hydrogen, a halogen, an alkyl group containing up to 50 non-hydrogen atoms, an aryl group containing up to 50 non-hydrogen atoms, a silyl group containing up to 50 non-hydrogen atoms, an alkoxy group containing up to 50 non- hydrogen atoms, an amino group containing up to 50 non-hydrogen atoms, a thiolato group containing up to 50 non-hydrogen
• a halogen containing compound (a halogen is an element of Group 17) selected from the following: i) Elemental forms of fluorine, chlorine, bromine, iodine, and astatine, such as F 2 , Cl 2 , Br 2 , 1 2 , and At or any other allotrope; ii) An interhalogen (compounds containing at least 2 Group 17 elements), salts containing their cations, and salts containing the anions thereof, such as C1F, C1F 3 , C1F 5 , BrF, BrF 3 , BrF 5 , IF, IF 3 , IF 5 , IF 7 , BrCl 3 , IC1,
• IBrFMs " A homoleptic or heteroleptic halogen oxide, salts containing the cations thereof, and salts containing the anion thereof, such as FClO 2 , ClO 2 + , F 2 ClO 2 ⁇ F 3 ClO, FClO 3 , F 3 ClO 2 , FBrO 2 , FBrO 3 , FIO 2 , F 3 IO, FIO 3 , F 3 IO 2 , F 5 IO, ClF 3 O, I 2 O 4 F 5 , F 2 O, F 2 O 2 , Cl 2 O, ClO 2 ,
• a hydrogen halide such as HF, HC1, HBr, HI, HAt; vifjNHtF, SF 4 , SbF 3 , AgF 2 , KHF 2 , ZnF 2 , AsF 3 , and salts containing the HF 2 " anion; viii) A hydrohalic acid, such as HF (aq) , HCl (aq ), HBr (aq) , HI (aq ), HAt (aq) ; A noble gas containing compound (a noble gas is an element of Group 18) selected from the following: i) A He, Ne, Ar, Kr, Xe, and Rn oxide, salts containing the cations thereof,-and salts containing the anions thereof, such as XeO 3 , XeO 2 , XeO 4
• the optional halogenated hydrocarbon may be added to the polymerization medium in any amount sufficient to effect production of the desired polyolefin. It is preferred to incorporate the halogenated hydrocarbon in a molar ratio of halogenated hydrocarbon to metal component of the metallocene catalyst ranging from about 0.001 : 1 to about 100: 1. In a more preferred embodiment, the molar ratio of halogenated hydrocarbon to metal component ranges from about 0.001 :1 to about 10:1.
• novel polyethylenes are homopolymers of ethylene and copolymers of ethylene and at least one or more alpha-olefins having 3 to 16 carbon atoms wherein ethylene comprises at least about 50% by weight of the total monomers involved.
• any conventional additive may be added to the olefin polymers and interpolymers of the present invention.
• the additives include nucleating agents, heat stabilizers, antioxidants of phenol type, sulfur type and phosphorus type, lubricants, antistatic agents, dispersants, copper harm inhibitors, neutralizing agents, foaming agents, plasticizers, anti-foaming agents, flame retardants, crosslinking agents, flowability improvers such as peroxides, ultraviolet light absorbers, light stabilizers, weathering stabilizers, weld strength improvers, slip agents, anti-blocking agents, antifogging agents, dyes, pigments, natural oils, synthetic oils, waxes, fillers and rubber ingredients.
• the novel polyolefins of the present invention may be fabricated into films by any technique known in the art. For example, films may be produced by the well known cast film, blown film and extrusion coating techniques.
• novel polyolefins may be fabricated into other articles of manufacture, such as molded articles, by any of the well known techniques.
• the molecular weight distribution (MWD), the ratio of Mw/Mn, of the olefin polymers and interpolymers is determined with a Waters Gel Permeation Chromatograph Series 150C equipped with Ultrastyrogel columns and a refractive index detector.
• the operating temperature of the instrument was set at 140°C
• the eluting solvent was o-dichlorobenzene
• the calibration standards included 10 polystyrenes of precisely known molecular weight, ranging from a molecular weight of 1000 to a molecular weight of 1.3 million, and a polyethylene standard, NBS 1475.
• the polymerization process utilized in Examples 1-12 herein is carried out in a fluidized-bed reactor for gas-phase polymerization, consisting of a vertical cylinder of diameter 0.74 meters and height 7 meters and surmounted by a velocity reduction chamber.
• the reactor is provided in its lower part with a fluidization grid and with an external line for recycling gas, which connects the top of the velocity reduction chamber to the lower part of the reactor, at a point below the fluidization grid.
• the recycling line is equipped with a compressor for circulating gas and a heat transfer means such as a heat exchanger.
• the reactor contains a fluidized bed consisting of a polyethylene powder made up of particles with a weight-average diameter of about 0.5 mm to about 1.4 mm.
• the gaseous reaction mixture which contains ethylene, olefin comonomer, hydrogen, nitrogen and minor amounts of other components, passes through the fluidized bed under a pressure ranging from about 280 psig to about 300 psig with an ascending fluidization speed, referred to herein as fluidization velocity, ranging from about 1.6 feet per second to about 2.0 feet per second.
• the liquid compound When a liquid compound is utilized to narrow the molecular weight distribution, the liquid compound is introduced continuously into the line for recycling the gaseous reaction mixture as a solution, for example, in n-hexane, n- pentane, isopentane or 1-hexene, at a concentration of about 1 weight percent.
• a gaseous compound When a gaseous compound is utilized to narrow the molecular weight distribution, for example, N 2 O, the gaseous compound is introduced continuously into the line for recycling the gaseous reaction mixture.
• the polymerization process is carried out as described above.
• the olefins used herein are ethylene and 1-hexene. Hydrogen is used to control molecular weight.
• the metallocene catalyst comprises bis(l-butyl-3- methylcyclopentadienyl)zirconium dichloride and methylaluminoxane supported on silica. There can be produced an interpolymer having a molecular weight distribution greater than 2.
• the molecular weight distribution (MWD) of the ethylene/ 1-hexene interpolymer is expected to be reduced as a result of incorporating dinitrogen monoxide (N 2 O) in the polymerization medium.
• N 2 O dinitrogen monoxide
• Example 2 propylene
• Example 6 1-octene.
• the molecular weight distribution of the ethylene/olefm interpolymer having a molecular weight distribution greater than two is expected to be reduced as a result of incorporating the dinitrogen monoxide in the polymerization medium.
• Example 1 The process of Example 1 is followed with the exception that the supported metallocene catalyst is replaced with the following silica supported metallocene catalysts:
• Example 7 bis( 1 -butyl-3 -methylcyclopentadienyl)dimethyl- zirconium and tris(perfluorophenyl)borane,
• Example 8 bis(l -butyl-3 -methylcyclopentadienyl)dimethyl- zirconium and triphenylmethylium tetrakis- (perfluorophenyl)borate,
• Example 9 (tert-butylamido)dimethyl(tetramethyl- ⁇ 5 - cyclopentadienyl)silanetitaniumdimethyl and triphenylmethylium tetrakis(perfluorophenyl)borate,
• Example 10 (tert-butylamido)dimethyl(tetramethyl- ⁇ 5 - cyclopentadienyl)silanetitaniumdimethyl and tris(perfluorophenyl)borane,
• Example 11 (tert-butylamido)dimethyl(tetramethyl- ⁇ 5 - cyclopentadienyl)silanetitaniumdimethyl and methylaluminoxane .
• EXAMPLE 12 The process of Example 1 is followed with the exception that trimethylaluminum is added, in addition to the metallocene catalyst, to the polymerization process.
• Films can be prepared from the ethylene/olefm interpolymers of the present invention.
• Articles such as molded items can also be prepared from the ethylene/olefm interpolymers of the present invention.

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• 1999
  • 1999-10-14 EP EP99954976A patent/EP1194459B1/en not_active Expired - Lifetime
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