WO2011016991A2 - Dual- or multi-headed chain shuttling agents and their use for the preparation of block copolymers - Google Patents
Dual- or multi-headed chain shuttling agents and their use for the preparation of block copolymers Download PDFInfo
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- WO2011016991A2 WO2011016991A2 PCT/US2010/042605 US2010042605W WO2011016991A2 WO 2011016991 A2 WO2011016991 A2 WO 2011016991A2 US 2010042605 W US2010042605 W US 2010042605W WO 2011016991 A2 WO2011016991 A2 WO 2011016991A2
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- WIPO (PCT)
- Prior art keywords
- hydrocarbyl
- inclusive
- headed
- carbon atoms
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- ZDMNAVSJDAXTBD-UHFFFAOYSA-N tris(2,3,4,5,6-pentafluorophenyl)alumane 2-undecyl-4,5-dihydro-1H-imidazole Chemical compound CCCCCCCCCCCC1=NCCN1.FC1=C(F)C(F)=C(F)C(F)=C1[Al](C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F.FC1=C(F)C(F)=C(F)C(F)=C1[Al](C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F ZDMNAVSJDAXTBD-UHFFFAOYSA-N 0.000 description 1
- NVBHDPLKAHDQDC-UHFFFAOYSA-N tris(2,3,4,5,6-pentafluorophenyl)borane;2-undecyl-1h-imidazole Chemical compound CCCCCCCCCCCC1=NC=CN1.FC1=C(F)C(F)=C(F)C(F)=C1B(C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F.FC1=C(F)C(F)=C(F)C(F)=C1B(C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F NVBHDPLKAHDQDC-UHFFFAOYSA-N 0.000 description 1
- MDYARPNTSPYOED-UHFFFAOYSA-N tris(2,3,4,5,6-pentafluorophenyl)borane;2-undecyl-4,5-dihydro-1h-imidazole Chemical compound CCCCCCCCCCCC1=NCCN1.FC1=C(F)C(F)=C(F)C(F)=C1B(C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F.FC1=C(F)C(F)=C(F)C(F)=C1B(C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F MDYARPNTSPYOED-UHFFFAOYSA-N 0.000 description 1
- RERMPCBBVZEPBS-UHFFFAOYSA-N tris(2,6-dimethylphenyl)phosphane Chemical compound CC1=CC=CC(C)=C1P(C=1C(=CC=CC=1C)C)C1=C(C)C=CC=C1C RERMPCBBVZEPBS-UHFFFAOYSA-N 0.000 description 1
- OLFPYUPGPBITMH-UHFFFAOYSA-N tritylium Chemical group C1=CC=CC=C1[C+](C=1C=CC=CC=1)C1=CC=CC=C1 OLFPYUPGPBITMH-UHFFFAOYSA-N 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229960000834 vinyl ether Drugs 0.000 description 1
- UIYCHXAGWOYNNA-UHFFFAOYSA-N vinyl sulfide Chemical compound C=CSC=C UIYCHXAGWOYNNA-UHFFFAOYSA-N 0.000 description 1
- 125000002348 vinylic group Chemical group 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 238000004260 weight control Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- VPGLGRNSAYHXPY-UHFFFAOYSA-L zirconium(2+);dichloride Chemical compound Cl[Zr]Cl VPGLGRNSAYHXPY-UHFFFAOYSA-L 0.000 description 1
Classifications
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- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/06—Aluminium compounds
- C07F5/061—Aluminium compounds with C-aluminium linkage
- C07F5/062—Al linked exclusively to C
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/02—Magnesium compounds
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- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/06—Zinc compounds
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- 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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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- C08F2/00—Processes of polymerisation
- C08F2/60—Polymerisation by the diene synthesis
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
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- 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
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- 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
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- C08F2420/00—Metallocene catalysts
- C08F2420/02—Cp or analog bridged to a non-Cp X anionic donor
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- 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+
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- 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
- C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
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- 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
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- 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
- C08F4/65927—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 bridged
Definitions
- This disclosure relates to olefin polymerization catalysts
- polystyrene resin The properties and applications of polyolefins depend to varying degrees upon the specific features of the catalysts used in their preparation. Specific catalyst compositions, activation conditions, steric and electronic features, and the like, all can factor into the characteristics of the resulting polymer product. Indeed, a multitude of polymer features such as co-monomer incorporation, molecular weight, polydispersity, and long-chain branching, and the related physical properties such as density, modulus, melt properties, tensile features, and optical properties, can all be affected by catalyst design.
- block copolymers can be prepared from a common monomer environment by using a mixture of catalysts of different selectivities, such as different stereoselectivities or monomer selectivities. Under the right conditions, efficient chain shuttling can produce a multiblock copolymer that features a random distribution of hard and soft blocks of random length.
- CSAs chain shuttling agents
- diethyl zinc contains two zinc -ethyl moieties from which a polymer can be attached
- chain shuttling between the CSA and catalyst occurs in one direction on each polymer chain.
- dual-headed CSAs containing an equal number of zinc-alkyl and zinc-alkdiyl groups can potentially lead to reduced homogeneity in the polymer architecture. Such materials can also lead to a broadening of product molecular weight distribution.
- the present disclosure provides for a chain shuttling agent having the formula:
- M A is Zn or Mg
- M B is B, Al, or Ga
- M c is Mg
- R 1 in each occurrence is independently selected from hydrogen, halide, amide, hydrocarbyl, hydrocarbylamide, dihydrocarbylamide, hydrocarbyloxide, hydrocarbylsulfide, dihydrocarbylphosphido, tri(hydrocarbyl)silyl; any hydrocarbyl group being optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and each carbon-containing R 1 having from 1 to 20 carbon atoms, inclusive;
- R 2 in each occurrence is independently selected from (CH 2 ) m ,
- R B Si[(CH 2 ) n CH 2 CH 2 ] 2 , (R B ) 3 Si0SiR B [(CH 2 ) n CH 2 CH 2 ] 2 , or [Si(R B ) 2 (CH 2 ) n CH 2 CH 2 ] 2 O; wherein n in each occurrence is independently an integer from 1 to 20, inclusive; m is an integer from 2 to 20, inclusive; R A is H or a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and R B in each occurrence is independently a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and N, on average, in each occurrence is a number from 2 to 150, inclusive.
- N is the average that describes a sample of molecules and will not necessarily be an integer.
- N on average can be a number from 5 to 140, from 10 to 125, from 15 to 110, or from 20 to 100, inclusive.
- the N value of a sample can be determined by NMR spectroscopy or comparable methods.
- R 1 generally can be selected from any monovalent moiety that does not prevent chain shuttling from occurring.
- R 1 is typically selected from a hydrocarbyl such as an alkyl having from 1 to 20 carbon atoms.
- R 2 can be selected independently from ethandiyl, 1,3-propandiyl, 1,4-butandiyl, 1,5-pentandiyl, 1 ,6-hexandiyl, 2,5-hexandiyl, 1 ,7-heptandiyl, 1,8-octandiyl, 1 ,9-nonandiyl, 1,10-decandiyl, and the like.
- the present disclosure provides for a process for making the chain shuttling agents having the formula R 1 [M A -R 2 -] N M A R 1 , R 1 [M 13 R 1 -R 2 - ] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , or M B [R 2 ] 3 M B , as described above.
- the present disclosure provides for a catalyst composition comprising the contact product at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent as described above.
- the present disclosure provides for a process for preparing a catalyst component, the process comprising contacting at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent having the formula R 1 [M A -R 2 -] N M A R 1 , R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , or M B [R 2 ] 3 M B , as described above.
- the present disclosure provides for a process for the polymerization of at least one addition polymerizable monomer to form a polymer composition, the process comprising:
- the catalyst composition comprising the contact product of at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent having the formula R 1 [M A -R 2 -] N M A R 1 , R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , or M B [R 2 ] 3 M B ,as described above.
- this disclosure provides a chain shuttling agent represented by the following Newkome dendrimer nomenclature:
- C is a core selected from a metal, alkdiyl di(metal), alktriyl tri(metal), or alktetrayl tetra(metal), wherein the metal is Zn, Mg, B, Al, or Ga, and any carbon-containing core having from 2 to 50 carbon atoms;
- R in each occurrence is a repeat unit selected from an alkdiyl metal, alktriyl di(metal), or alktetrayl tri(metal) having from 2 to 20 carbon atoms and an average branch multiplicity of N b ;
- G is the generation of the dendrimer cascade
- Z is a terminal monovalent group having up to 20 carbon atoms
- N c is the branch multiplicity of the core
- the shuttling agent comprises at least one generation of repeat unit R, such that G, on average, is an number from 2 to 150, inclusive.
- G is the average generational description of a sample of molecules and will not necessarily be an integer.
- the G and N of a sample can be determined by NMR spectroscopy or comparable methods.
- This disclosure also provides a process for the polymerization of at least one addition polymerizable monomer to form a polymer composition, the process comprising:
- the catalyst composition comprising the contact product of at least one polymerization catalyst precursor, at least one cocatalyst, and at least one chain shuttling agent as described above.
- This disclosure also provides for a catalyst composition comprising the contact product of least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent represented by the Newkome dendrimer nomenclature above.
- This disclosure also provides for a process for preparing such a catalyst component, the process comprising contacting at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent of this Newkome dendrimer nomenclature.
- the present disclosure provides for a process for making the chain shuttling agents having the formulas [C] [(R)N u (Z)]N > as described above.
- the branch multiplicity of the core (N c ) is two for zinc and for an alkdiyl di(metal), three for an alktriyl tri(metal), and four for an alktetrayl tetra(metal).
- the branch multiplicity N b of the repeat unit R is one for an alkandiyl metal, two for an alkantriyl di(metal), and three for an alkantetrayl tri(metal).
- chain shuttling agents such as
- R 1 [M A -R 2 -] N - MV and R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 disclosed herein constitute CSAs that typically can be described by the Newkome dendrimer nomenclature [C] [(R)N. (Z)]N•
- a further aspect of this disclosure relates to the preparation and utility of catalyst compositions having new structural entities containing repeating units of main group metals and alkandiyl groups, such as -alkandiyl-zinc-alkandiyl-zinc-alkandiyl-, and so forth.
- Such structures can function as dual headed CSAs and can be used in block- type polymerization reactions. For example, when the monomer feed or concentration is altered during a copolymerization process, symmetric gradient triblock copolymers can be formed. The process can be extended to form a symmetric multiblock copolymer with an odd number of blocks, with those blocks having either a gradual or a sharp gradient in composition or crystallinity.
- this disclosure provides for
- compositions comprising or selected from the polymeric and heteroatom substituted CSAs disclosed herein, and processes for making and using them, and compositions of the product polymers.
- one aspect of the present disclosure provides an olefin polymer composition characterized by a narrow molecular weight distribution and a process for preparing the olefin polymer composition.
- the polymer compsition is prepared in situ by the polymerization of one or more addition polymerizable monomers, generally of two or more addition polymerizable monomers, particularly ethylene and at least one copolymerizable comonomer, propylene and at least one copolymerizable comonomer having 4 or more carbons, or 4-methyl-l-pentene and at least one different copolymerizable comonomer having 4 or more carbons, optionally comprising multiple blocks or segments of differentiated polymer composition or properties, especially blocks or segments comprising differing comonomer incorporation levels.
- the present process includes contacting an addition polymerizable monomer or mixture of monomers under addition polymerization conditions with a composition comprising at least one addition polymerization catalyst, a cocatalyst and a dual-headed or multi- headed chain shuttling agent as provided herein.
- this disclosure provides a process for forming an n-block copolymer where n is an odd number greater than or equal to 3, the process comprising contacting at least one addition polymerizable monomer with a catalyst composition under polymerization conditions; the catalyst composition comprising at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent as disclosed herein; wherein the process comprises (n+l)/2 combination chain transfer and growth steps.
- shuttling agent or “chain shuttling agent” refers to a compound or mixture of compounds that is capable of causing polymeryl transfer between various active catalyst sites under conditions of polymerization. That is, transfer of a polymer fragment occurs both to and from an active catalyst site in a facile and reversible manner.
- an agent that acts merely as a chain transfer agent such as some main-group alkyl compounds, may exchange, for example, an alkyl group on the chain transfer agent with the growing polymer chain on the catalyst, which generally results in termination of the polymer chain growth.
- the main-group center may act as a repository for a dead polymer chain, rather than engaging in reversible transfer with a catalyst site in the manner in which the chain shuttling agent does.
- the intermediate formed between the chain shuttling agent and the polymeryl chain is not sufficiently stable relative to exchange between this intermediate and any other growing polymeryl chain, such that chain termination is relatively rare.
- the multi- or dual-headed shuttling agents include species with metal- alkyl bonds that engage in chain transfer during a transition-metal catalyzed
- CSA solution typically comprises a complex mixture of different species. Therefore the useful CSAs disclosed here are typically described using average compositions, average numbers of multi-headed site valencies, average numbers of single-headed site valencies, and ratios of these numbers.
- dual-headed or “multi-headed” shuttling agent refers to a compound or molecule containing more than one chain shuttling moiety joined by a polyvalent linking group.
- a dual-headed CSA is provided in the compounds of the general formulas R 1 - [Zn-R 2 -] N Zn-R 1 or R 1 -[A1R 1 -R 2 -] N A1R 1 2 , in which R 1 is a monovalent hydrocarbyl group and R 2 is a divalent hydrocarbadiyl group.
- a tri-headed CSA is provided in the compounds of the general chemical formulas (R 3 Zn 3 ) [(R 3 (ZnR 1 ⁇ ] 3 , in which R 1 is a monovalent hydrocarbyl group such as ethyl, and R 3 is a trivalent hydrocarbatriyl group.
- R 1 is a monovalent hydrocarbyl group such as ethyl
- R 3 is a trivalent hydrocarbatriyl group.
- R 1 is a monovalent hydrocarbyl group such as ethyl
- R 3 is a trivalent hydrocarbatriyl group.
- a single polymer growth residue can be comprised of concantated segments from multiple catalysts. It is desireable to have all valencies of the R 3 moiety participate in this chain growth activity which will lead to the highest molecular weight polymer.
- suitable chain shuttling moieties typically include metal centers derived from a metal selected from Groups 2-14 of the Periodic Table of the Elements and having one or more available valencies capable of reversibly binding a growing polymer chain prepared by a coordination polymerization catalyst.
- the remnant of the polyvalent linking group remaining after loss of the chain shuttling moiety or moieties incorporates or otherwise bonds to one or more active catalyst sites, thereby forming a catalyst composition containing an active coordination polymerization site capable of polymer insertion at least one terminus of what was originally the polyvalent linking group
- the present disclosure provides for a series of dual-headed and multi-headed chain transfer agents that limit, reduce, or minimize the number of zinc-alkyl end groups or mono-headed CSA sites R 1 , in comparison with the dual-headed R 2 or multi-headed R 3 or R 4 CSA sites, a feature which has been discovered to lead to a more homogeneous polymer.
- This aspect may be reflected in more desirable polymer properties, such as a more narrow molecular weight distribution as compared to polymers resulting from chain transfer agents without such limits.
- the chain shuttling agent can be a dual-headed CSA with the ratio of R 2 sites to R 1 sites being greater than 1.
- the parameter Q is defined as the ratio of the number of multi-headed site valencies to the number of single site valencies in an empirical formula in the chain shuttling agent or agents.
- each R 1 group is considered as having one single site valency
- each R 2 group is considered as having two dual-headed site valencies, that is, valencies of the twofold type
- each R 3 is considered as possessing three three -headed or threefold type site valencies
- each R 4 is considered as four valencies of the fourfold type, and so forth.
- Rl, R2, R3, R4, and so forth up to Rn represent the number of R 1 , R 2 , R 3 , R 4 and Rn moieties or groups, respectively, in the empirical formula of a chain shuttling agent, then Q can be defined by the following formula:
- a similar series of aluminum chain shuttling agents is also encompassed by this disclosure, with corresponding features that limit the ratio of R 2 sites to R 1 sites.
- appropriate use of anionic heteroatom substitution, such as halide or alkoxide, on M can be used to decrease the value of Rl and therefore increase Q to higher values approaching infinity.
- the present disclosure provides for dual-headed and multi-headed chain shuttling agents (CSAs) and for their use in preparing block copolymers having desired properties.
- CSAs chain shuttling agents
- the present disclosure provides for the design and utility of CSAs in an olefin polymerization process, in which the ratio (Q) of dual-headed CSA site valencies (for example, alkdiyl or R 2 ) or multi-headed CSA site valencies (for example, alktriyl (R 3 ) or alktetrayl (R 4 )) to mono-headed CSA site valencies (for example, alkyl or any monovalent R 1 ) are regulated.
- Another aspect of the present disclosure provides for the preparation of new structural entities containing repeating units of main group metals such as zinc, aluminum, magnesium, boron, or gallium, and alkandiyl groups (for example, containing repeating moieties such as -alkadiyl-zinc-alkadiyl-zinc).
- alkandiyl, alkadiyl, and alkdiyl are used interchangeably.
- These structures are considered dual headed CSAs and can be used in block-type polymerization reactions. For example, when the monomer feed or concentration is changed during a copolymerization, symmetric gradient triblock copolymers can be formed. The process can be extended to form a symmetric multiblock copolymer with an odd number of blocks with those blocks having either gradual or sharp gradient in composition or crystallinity.
- one aspect provides for a batch reaction with ethylene and propylene and an activated catalyst using the dual-headed CSAs as disclosed herein. Because ethylene generally has a substantially higher reactivity than propylene, the propylene is added to excess as the reaction is run beyond full consumption of the limiting ethylene reagent.
- the final polymer morphology can include an
- CSAs as described here along with the addition of diethyl zinc or other single site CSA moieties which can create inhomogeneity.
- the relative amount of the inhomogeneity can be controlled by adding either more or less diethyl zinc to the reactor.
- additional blocks can be added to the end of the polymer by, for example, the addition of another monomer or by transferring the reaction mixture to another reactor.
- the present disclosure provides for inventive polymer products that include combinations of two or more polymers comprising regions or segments (blocks) of differing chemical composition or physical properties. Because the polymer composition can contain a linking group which is the remnant of a multi- centered shuttling agent, the resulting polymeric composition may possess unique physical and chemical properties compared to random mixtures of polymers of the same gross chemical composition and compared to block copolymers prepared with a chain shuttling agent lacking the dual-headed or multi-headed chain shuttling centers.
- the resulting polymer may be relatively monodisperse, form a controllable distribution of molecular weight polymers and/or branched or multiply branched polymers.
- the resulting polymers contain reduced incidence of crosslinked polymer formation evidenced by reduced gel fraction.
- the polymers produced according to this disclosure comprise less than 2 percent of a crosslinked gel fraction, more preferably less than 1 percent crosslinked gel fraction, and most preferably less than 0.5 percent of crosslinked gel fraction.
- a process for the polymerization of at least one addition polymerizable monomer to form a polymer composition comprising:
- the catalyst composition comprising the contact product of at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent represented by the following Newkome dendrimer nomenclature: [C][(R)N b (Z)]N c .
- C is a core selected from a metal, alkandiyl di(metal), alkantriyl tri(metal), or alkantetrayl tetra(metal), wherein the metal is Zn, Mg, B, Al, or Ga, and any carbon-containing core has from 2 to 50 carbon atoms;
- R in each occurrence is a repeat unit selected from an alkandiyl metal, alkantriyl di(metal), or alkantetrayl tri(metal) having from 2 to 20 carbon atoms and an average branch multiplicity of N b ;
- G is the generation of the dendrimer cascade;
- Z is a terminal monovalent group having up to 20 carbon atoms
- N c is the branch multiplicity of the core; and the shuttling agent comprises at least one generation of repeat unit R, such that G, on average, is an number from 2 to 150, inclusive.
- G is the average generational description of a sample of molecules and will not necessarily be an integer.
- the G and N of a sample can be determined by NMR spectroscopy or comparable methods.
- a catalyst composition comprising the contact product of at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent represented by the Newkome dendrimer nomenclature immediately above.
- G is an integer from 2 to 150, there is at least one repeated unit in the dendritic chain shuttling agent of this disclosure.
- G can be from 2 to 100, from 2 to 50, or from 2 to 25, as well as ranges and sub-ranges between.
- the present disclosure also provides a process for the polymerization of at least one addition polymerizable monomer to form a polymer composition, the process comprising:
- the catalyst composition comprising the contact product of at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent having the formula:
- M B [R 2 ] 3 M B wherein M B is B, Al, or Ga, as provided above;
- R 1 in each occurrence is independently a monovalent group such as hydrogen, halide, amide, hydrocarbyl, hydrocarbylamide, dihydrocarbylamide, hydrocarbyloxide, hydrocarbylsulfide, dihydrocarbylphosphido, tri(hydrocarbyl)silyl; any hydrocarbyl group being optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and each carbon- containing R 1 having from 1 to 30 carbon atoms;
- R 2 in each occurrence is independently selected from (CH 2 ) m ,
- R B Si[(CH 2 ) n CH 2 CH 2 ] 2 , (R B ) 3 Si0SiR B [(CH 2 ) n CH 2 CH 2 ] 2 , or [Si(R B ) 2 (CH 2 ) n CH 2 CH 2 ] 2 O; wherein n in each occurrence is independently an integer from 1 to 20, inclusive; m is an integer from 2 to 20, inclusive; R A is H or a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and R B in each occurrence is independently a hydrocarbyl having from
- N 1 to 12 carbon atoms, inclusive; and N, on average, in each occurrence is a number from
- R 1 can be selected from any monovalent moiety that does not prevent chain shuttling from occurring. Specific examples of R 1 include, but are not limited to, CH 3 , CH 2 CH 2 , CH 2 CH 2 CH 3 ,
- R 1 can be selected from a hydrocarbyl such as those specific moieties exemplified here.
- This disclosure also provides for a catalyst composition
- a catalyst composition comprising the contact product of least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent having the formulas presented immediately above.
- a number of dual-headed and multi-centered chain shuttling agents have been described herein that can be generally characterized by either the Newkome dendrimer nomenclature
- the CSAs can be described using the Newkome dendrimer nomenclature [C] [(R)N u (Z)]N > sucri species are characterized by having a generation of the dendrimer cascade G > 1.
- Specific examples include compounds of the formulas Et[Zn(CH 2 )J x ZnEt, in which n can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, and the like, and x can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, or greater, or Et[AlEt(CH 2 )J y AlEt 2 , in which m can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, and the like, and y can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, or greater, or Et[AlEt(CH
- R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 is expected to contain blends or mixtures of different species, having a range of values of N.
- Formulas such as R 1 [M A -R 2 -] N M A R 1 and R 1 PVI 13 R 1 -R 2 -] N - M B (R 1 ) 2 as used this disclosure are intended to reflect a population of molecules, characterized by a range or distribution of N values. Therefore, unless provided otherwise, values of N are stated as average values for the mixture of species in a particular sample, as evidenced by the ratio of R 2 to R 1 moieties which can be determined by, for example, 1 H NMR.
- chain shuttling agents of this disclosure include compounds of the formulas X[ZnR 2 J x ZnX or X [AlX(R 2 ) ] y AlX 2 , where R 2 is an alkdiyl moiety such as CH 2 CH 2 , and where x and y are integers greater than 1 and where X is selected independently from CH 3 , CH 2 CH 2 , CH 2 CH 2 CH 3 , CH 2 CH 2 CH 2 CH 3 , CH(CH 3 ) 2 , CH 2 CH(CH 3 ) 2 , C 6 H 5 , C 6 H 4 CH 3 , Cl, Br, I, OCH 3 , OCH 2 CH 2 , OC 6 H 5 , OCH 2 CH 2 CH 3 , OCH(CH 3 ) 2 , OC 6 H 5 , OC 6 H 4 CH 3 , OC 6 H 3 (CH 3 ) 2 , OC 6 H 2 (CH 3 ) 3 , SCH 3 , SCH 2 CH
- Suitable monomers for use in preparing the copolymers of the present disclosure include any addition polymerizable monomer, generally any olefin or diolefin monomer. Suitable monomers can be linear, branched, acyclic, cyclic, substituted, or unsubstituted.
- the olefin can be any ⁇ -olefin, including, for example, ethylene and at least one different copolymerizable comonomer, propylene and at least one different copolymerizable comonomer having from 4 to 20 carbons, or 4-methyl-l- pentene and at least one different copolymerizable comonomer having from 4 to 20 carbons.
- suitable monomers include, but are not limited to, straight-chain or branched ⁇ -olefins having from 2 to 30 carbon atoms, from 2 to 20 carbon atoms, or from 2 to 12 carbon atoms.
- suitable monomers include, but are not limited to, ethylene, propylene, 1-butene, 1-pentene, 3-methyl-l-butene, 1-hexane, 4- methyl-1-pentene, 3 -methyl- 1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1- hexadecene, 1-octadecene, and 1-eicosene.
- Suitable monomers for use in preparing the copolymers disclosed herein also include cycloolefins having from 3 to 30, from 3 to 20 carbon atoms, or from 3 to 12 carbon atoms.
- Examples of cycloolefins that can be used include, but are not limited to, cyclopentene, cycloheptene, norbornene, 5-methyl-2- norbornene, tetracyclododecene, and 2-methyl-l,4,5,8-dimethano-l,2,3,4,4a,5,8,8a- octahydronaphthalene.
- Suitable monomers for preparing the copolymers disclosed herein also include di- and poly-olefins having from 3 to 30, from 3 to 20 carbon atoms, or from
- di- and poly-olefins examples include, but are not limited to, butadiene, isoprene, 4-methyl-l,3-pentadiene, 1,3-pentadiene, 1,4- pentadiene, 1,5-hexadiene, 1 ,4-hexadiene, 1,3-hexadiene, 1,3-octadiene, 1,4-octadiene, 1,5-octadiene, 1,6-octadiene, 1,7-octadiene, ethylidene norbornene, vinyl norbornene, dicyclopentadiene, 7-methyl-l,6-octadiene, 4-ethylidene-8-methyl-l,7-nonadiene, and 5,9-dimethyl-l,4,8-decatriene.
- aromatic vinyl compounds also constitute suitable monomers for preparing the copolymers disclosed here, examples of which include, but are not limited to, mono- or poly-alkylstyrenes (including styrene, o- methylstyrene, m-methylstyrene, p-methylstyrene, o,p- dimethylstyrene, o-ethylstyrene, m-ethylstyrene and p-ethylstyrene), and functional group-containing derivatives, such as methoxy styrene, ethoxystyrene, vinylbenzoic acid, methyl vinylbenzoate, vinylbenzyl acetate, hydroxys tyrene, o-chlorostyrene, p-chlorostyrene, divinylbenzene, 3- phenylpropene, 4-phenylpropene and ⁇ -methylstyrene,
- suitable monomers or mixtures of monomers for use in combination with at least one dual and multi-headed chain shuttling agent disclosed here include ethylene; propylene; mixtures of ethylene with one or more monomers selected from propylene, 1-butene, 1-hexene, 4-methyl-l-pentene, 1-octene, and styrene; and mixtures of ethylene, propylene and a conjugated or non-conjugated diene.
- the copolymer or interpolymer can contain two or more intramolecular regions comprising differing chemical or physical properties, especially regions of differentiated comonomer incorporation, joined in a dimeric, linear, branched or polybranched polymer structure.
- Such polymers may be prepared by altering the polymerization conditions during a polymerization that includes a dual-headed or multi-headed chain shuttling agent, for example by using two reactors with differing comonomer ratios, multiple catalysts with differing comonomer incorporation abilities, or a combination of such process conditions, and optionally a polyfunctional coupling agent.
- the shuttling agent while attached to the growing polymer chain, desirably does not alter the polymer structure or incorporate additional monomer. That is, the shuttling agent typically does not also possess significant catalytic properties for polymerization. Rather, the shuttling agent can form a metal-alkyl or other type of interaction with the polymer moiety until transfer of the polymer moiety to an active polymerization catalyst site again occurs. Transfer of the same shuttling agent site back to the original catalyst merely results in an increase in polymer molecular weight.
- the subsequently formed polymer region also possesses a distinguishable physical or chemical property, such as a different monomer or comonomer identity, a difference in comonomer composition distribution, crystallinity, density, tacticity, regio-error, or other property, compared to the polymer formed at other times during the polymerization.
- a distinguishable physical or chemical property such as a different monomer or comonomer identity, a difference in comonomer composition distribution, crystallinity, density, tacticity, regio-error, or other property, compared to the polymer formed at other times during the polymerization.
- Subsequent repetitions of the foregoing process can result in formation of segments or blocks having a multiplicity of differing properties, or a repetition of a previously formed polymer composition, depending on the rates of polymeryl exchange, the number of reactors or zones within a reactor, the transport features between the reactors or zones, the number of different catalysts, the monomer gradient in the reactor(s), and so forth
- Transfer of the growing polymer can occur multiple times with continued growth of a polymer segment each time it is attached to an active catalyst.
- the growing polymer blocks can be substantially homogeneous, though their size conforms to a distribution of sizes, for example, a most probable distribution of sizes.
- the respective polymer segments Under differing polymerization conditions such as the presence of different monomers or monomer gradients in a reactor, multiple reactors operating under differing process conditions, and so forth, the respective polymer segments also may be distinguished based on differences in chemical or physical properties. Chain shuttling and further growth may continue in this described manner for any number of cycles.
- Examples of some chain shuttling agents and their Newkome nomenclature are provided in the following Table 1. These examples include general linker and core groups of the general type R n , where n is the valence of the particular group, examples of which include alkyl (R 1 ), alkdiyl (R 2 ), alktriyl (R 3 ), and alktetrayl (R 4 ), although R 1 through R 4 are not limited strictly to hydrocarbyl-type moieties, for example, alkyl, halide, and alkoxy all constitute R 1 moieties.
- alkadiyl or alkandiyl also may be used to refer to a divalent alkdiyl (R 2 ) moiety, just as alkatriyl or alkantriyl may be used to refer to the trivalent alktriyl (R 3 ) moiety, and alkatetrayl or alkantetrayl may be used to refer to the tetravalent alktetrayl (R 4 ) moieties, respectively.
- the CSA structures in Table 1 are not intended to be limiting but are illustrations of average stoichiometries or empirical formulas, as provided herein.
- An additional aspect of this disclosure provides for chain shuttling agents that are not readily described by the Newkome nomenclature, to the extent that they are not formally dendritic species.
- the group 12 reagents M C [R 2 ] 2 M C , where M c is Mg, and the group 13 reagents M B [R 2 ] 3 M B , where M B is B, Al, or Ga are chain shuttling agents that are useful in the disclosed polymerizations, but are not classic dendrimers. Examples of these species include the following compounds:
- chain shuttling agents that are encompassed by this disclosure include those having the formula:
- M B [R 2 ] 3 M B wherein M B is B, Al, or Ga;
- R 1 in each occurrence is independently a monovalent group such as hydrogen, halide, amide, hydrocarbyl, hydrocarbylamide, dihydrocarbylamide, hydrocarbyloxide, hydrocarbylsulfide, dihydrocarbylphosphido, tri(hydrocarbyl)silyl; any hydrocarbyl group being optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and each carbon- containing R 1 having from 1 to 30 carbon atoms;
- R 2 in each occurrence is independently selected from (CH 2 ) m ,
- R B Si[(CH 2 ) n CH 2 CH 2 ] 2 , (R B ) 3 Si0SiR B [(CH 2 ) n CH 2 CH 2 ] 2 , or [Si(R B ) 2 (CH 2 ) n CH 2 CH 2 ] 2 O; wherein n in each occurrence is independently an integer from 1 to 20, inclusive; m is an integer from 2 to 20, inclusive; R A is H or a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and R B in each occurrence is independently a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and
- N on average, in each occurrence is a number from 2 to 150, inclusive.
- a further aspect of the chain shuttling agents of this disclosure is provided by considering the parameter Q, as defined above.
- Q the ratio of multi-headed site valencies to mono-headed site valencies
- Q > 1 the ratio of multi-headed site valencies to mono-headed site valencies
- co-polymers or interpolymers having more desirable polymer properties such as a more narrow molecular weight distribution as compared to polymers resulting from chain shuttling agents without such limits can be prepared.
- one aspect of this disclosure is the use of chain shuttling agents with 2 or more metal atoms per CSA molecule having at least two reactive fragments with valence of two or more, such as R 2 , R 3 , R 4 , and so forth.
- Compositions, reagents, and methods that involve or comprise any aspect of chain shuttling agents with Q > 1 are also
- R 1 groups, but includes any of the hydrogen, halide, amide, hydrocarbyl,
- hydrocarbylamide hydrocarbyloxide, moieties and the like, each of which comprises a mono-headed site valency.
- the following table includes a variety of dual-headed and multi-headed CSAs that are encompassed by this disclosure and that are useful in the polymerization chemistry described here.
- CSAs of this disclosure typically have Q >1
- one type of CSA that is encompassed herein can have a Q as low as 4/5.
- this exceptional CSA is the linear, group 13 (B, Al, Ga) chain shuttling agents having the formula R 1 [M B R 1 -R 2 -] N>1 M B R 1 2 , where M B is B, Al, or Ga.
- R 1 [M B R 1 -R 2 -] N>1 M B R 1 2 where M B is B, Al, or Ga.
- useful CSAs of this disclosure include those R 1 [M B R 1 -R 2 -] N>1 M B R 1 2 compounds having at least three Group 13 atoms, that is, R 1 [M B R 1 -R 2 -] 2 M B R 1 2 ,
- R 1 [M B R 1 -R 2 -] 3 M B R 1 2 , R 1 [M 13 R 1 -R 2 ⁇ 4 M 1 V 2 , and larger, although the smallest molecule having N 2, provides a calculated Q of less than 1. Nonetheless, all of these linear, group 13 reagents are included here as long as N>1.
- group 13 CSAs of the form R ⁇ M 13 R 1 -R 2 -] N>1 M B R 1 2 and their calculated Q values in the CSA R 1 [M B R 1 -R 2 - ] N>I M B R 1 2 , the value of R2 is 2N, and the value of Rl is 3+N.
- a further aspect of this disclosure provides for a catalyst composition
- a catalyst composition comprising the contact product at least one polymerization catalyst precursor, at least one cocatalyst, and at least one shuttling agent having the formula R 1 [M A -R 2 -] N M A R 1 , R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , or M B [R 2 J 3 M 13 , or an aggregate thereof, a Lewis base-containing derivative thereof, or any combination thereof; wherein each variable M A , M B , M c , R 1 , R 2 , and N are defined herein.
- R 2 -] N M A R ⁇ R ⁇ M 13 R 1 -R 2 -] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , or M B [R 2 ] 3 M B , certain selections of R 1 , R 2 , and N can be particularly useful.
- values of N can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or values of about 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120, 130, 140, or 150, or even greater, including any range or set of ranges between any of these values.
- R 1 [M A -R 2 -] N M A R 1 and R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 is expected to contain a mixture of different species having different N values, therefore, any given sample of these CSAs will be characterized by having a range of values of N.
- Formulas such as R ! [M A -R 2 - ] N M A R ! and R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 as used in this disclosure are intended to reflect a population of molecules, characterized by a range or distribution of N values. Therefore, unless provided otherwise, values of N are stated as average values for the mixture of species in a particular sample, as evidenced by the ratio of R 2 to R 1 moieties which can be determined by, for example, 1 H NMR.
- R 2 moieties can be used.
- R 2 is any moiety with two site valencies, that does not prevent the formation and chain-shuttling activity of the chain shuttling agent that contains that specific R 2 .
- the specific R 2 does not contain a reactive functional group or reactive moiety that substantially adversely reacts with or interferes with a borohydride or an alkylzinc reagent.
- the typical example of an R 2 is a hydrocarbdiyl, such as alkdiyl.
- R 2 can be derived from an ⁇ , ⁇ -diene -containing species, including ⁇ , ⁇ -dienes (also termed ⁇ , ⁇ -diolefins), and therefore R 2 can be defined according to the ⁇ , ⁇ -diene- containing precursor used in its preparation.
- the synthetic method for preparing the dual-headed zinc reagents described in the examples generally are applicable to the synthesis of any chain shuttling agent derived from any ⁇ , ⁇ -diene- containing species, or any molecule that contains multiple olefin groups.
- These precursors are selected such that the diene does not contain a reactive functional group, which can adversely react with or interfere with a borohydride or an alkylzinc reagent.
- molecules that contain multiple olefin groups and functional groups that have been suitably protected as understood by one skilled in the art can be used if it interferes with a borohydride or an alkylzinc reagent.
- the suitable R 2 groups can have from 2 to 40 carbon atoms, inclusive.
- the R 2 groups can have up from 2 to 25 carbon atoms, from 2 to 15 carbon atoms, or from 2 to 12 carbon atoms, inclusive.
- Suitable ⁇ , ⁇ -diene -containing species include hydrocarbyl ⁇ , ⁇ -dienes, functionalized hydrocarbyl ⁇ , ⁇ -dienes such as heteroatom-functionalized diene compounds, and other ⁇ , ⁇ -diene-containing compounds such as l,3-di( ⁇ -alkenyl)- tetramethyldisiloxanes and di( ⁇ -alkenyl)ethers.
- R 2 moieties that arise from use of these ⁇ , ⁇ -diene-containing compounds include the corresponding alkdiyl- type moiety arising from addition to the specific ⁇ , ⁇ -diene -containing coompounds noted; however, this disclosure encompasses such corresponding R 2 moieties, regardless of the particular synthetic method by which the R 2 linker might be prepared.
- hydrocarbyl ⁇ , ⁇ -dienes examples include but are not limited to 1,3-butadiene, 1 ,4-pentadiene, 1,5-hexadiene, 1,6-heptadiene, 1 ,7-octadiene, 1,8-nonadiene, 1,9- decadiene, 1,10-undecadiene, 1,11-dodecadiene, 1,12-tridecadiene, 1,13-tetradecadiene, vinyl norbornene, norbornadiene, dicyclopentadiene, cyclooctadiene, vinyl cyclohexene, and the like, typically containing from 5 to 40 carbon atoms.
- the R 2 moieties that arise from use of these ⁇ , ⁇ -diene -containing precursors include the corresponding alkdiyl moiety arising from addition to the named diene, having the formula [-CH 2 CH 2 (CH 2 ) D CH 2 CH 2 -] where n is an integer from 1 to 20.
- the R 2 moieties that are derived from the dienes listed above would include 1,5-pentdiyl (arising from 1,4-pentadiene), 1,6-hexdiyl (arising from 1,5-hexadiene), 1,7-heptdiyl (arising from 1,6-heptadiene), and so forth.
- CSAs containing these molecules typically are prepared by a different route than the method of Scheme 3, as described in the Examples section of the present disclosure, that is useful for these longer ⁇ , ⁇ -diene precursors.
- Ethandiyl could be prepared by a known procedure (Eisch, J. J.; Kotowicz, B. W. Eur. /. Inorg. Chem. 1998, 761-769).
- Linkers of C3 are prepared by a known route (Bhanu Prasad, A. S.; Eick, H.; Knochel, P. J.
- 1,4-butdiyl (C 4 ) CSA linkers generally are prepared by routes similar to those for propandiyl.
- Functionalized hydrocarbyl ⁇ , ⁇ -dienes as referred to herein include ⁇ , ⁇ - dienes which are heteroatom-suibstituted by at least one O, S, N, or Si atom, or a combination of atoms.
- the R 2 moieties that arise from use of these ⁇ , ⁇ -diene -containing compounds include the corresponding alkdiyl-type moiety arising from addition to the specific ⁇ , ⁇ -diene-containing compounds noted, and this disclosure encompasses such R 2 moieties, independent of any particular synthetic method by which they are prepared.
- Examples of functionalized hydrocarbyl ⁇ , ⁇ -dienes include but are not limited to divinyl ether, di(2-propenyl)ether, di(3-butenyl)ether, di(4-pentenyl)ether, di(5-hexenyl)ether, divinyl amine, di(2-propenyl)amine, di(3-butenyl)amine, di(4- pentenyl) amine, di(5-hexenyl)amine, divinyl methylamine, di(2-propenyl)methylamine, di(3-butenyl)methylamine, di(4-pentenyl)methylamine, di(5-hexenyl)methylamine, divinyl thioether, di(2-propenyl)thioether), di(3-butenyl)thioether, di(4- pentenyl)thioether, di(5-hexenyl)thioether, divinyl dimethylsilane, di(2-propen
- suitable functionalized hydrocarbyl ⁇ , ⁇ -dienes include but are not limited to the disiloxane compounds such as the 1,1- and the 1,3- isomers of divinyl tetramethyldisiloxane (also referred to here as di(ethan-l,2- diyl) tetr amethyldisiloxane) , di(2-propenyl)tetramethyldisiloxane , di(3 - butenyl)tetramethyldisiloxane, di(4-pentenyl)tetramethyldisiloxane, di(5- hexenyl)tetr amethyldisiloxane, di(6-heptenyl)tetramethyldisiloxane, di(7- octenyl)tetramethyldisiloxane, di(8-nonenyl)tetramethyldisiloxane, di(9-decen
- R 2 moieties that would arise from these precursors are the 1,1- and the 1,3- isomers of di(ethan-l,2-diyl)tetr amethyldisiloxane, di(propan-l,3- diyl)tetramethyldisiloxane, di(butan-l ,4-diyl)tetramethyldisiloxane, di(pentan-l ,5- diyl)tetramethyldisiloxane, di(hexan-l,6-diyl)tetramethyldisiloxane, di(heptan-l,7- diyl)tetramethyldisiloxane, di(octan-l ,8-diyl)tetramethyldisiloxane, di(non-l ,9- diyl)tetramethyldisiloxane, di(decan-l,10-diyl)tetramethyldisiloxane,
- the suitable 1,1- and l,3-di( ⁇ -alkenyl)- tetraalkyldisiloxane type R 2 moieties can have from 8 to 40 carbon atoms, inclusive, or from 8 to 30 carbon atoms, or from 8 to 20 carbon atoms.
- unsymmetric ⁇ , ⁇ -diene-containing molecules can be employed, examples of which include (3-butenyl)(5-hexenyl)ether, (2- propenyl)(4-pentenyl)ethylamine, and so forth.
- These functionalized hydrocarbyl ⁇ , ⁇ - diene precursors also give rise to the corresponding alkdiyl-type moiety arising from addition to the named diene.
- di(3-butenyl)ether would form the corresponding R 2 di(butdiyl)ether linker illustrated below.
- All the ⁇ , ⁇ -diene -containing species disclosed here provide the corresponding alkdiyl-type moiety upon addition to the named diene, for example, the 1,3-dialkdiyltetralkyldisiloxane that corresponds to the l,3-di( ⁇ - alkenyl)tetraalkyldisiloxane employed.
- This disclosure also provides for methods of making the novel chain shuttling agents.
- a process is provided for preparing a chain shuttling agent having the formula:
- n in each occurrence is independently an integer from 0 to 20, inclusive;
- R A is H or a hydrocarbyl having from 1 to 12 carbon atoms, inclusive;
- R B in each occurrence is independently a hydrocarbyl having from 1 to 12 carbon atoms, inclusive;
- R 1A in each occurrence is independently selected from hydrogen or a hydrocarbyl having from 1 to 20 carbon atoms, inclusive, optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide ;
- R 1 in each occurrence is independently selected from hydrogen, halide, amide, hydrocarbyl, hydrocarbylamide, dihydrocarbylamide, hydrocarbyloxide, hydrocarbylsulfide, dihydrocarbylphosphido, tri(hydrocarbyl)silyl; any hydrocarbyl group being optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and each carbon-containing R 1 having from 1 to 20 carbon atoms, inclusive;
- R 2 in each occurrence is independently selected from (CH 2 ) m ,
- R B Si[(CH 2 ) n CH 2 CH 2 ] 2 , (R B ) 3 Si0SiR B [(CH 2 ) n CH 2 CH 2 ] 2 , or [Si(R B ) 2 (CH 2 ) n CH 2 CH 2 ] 2 O; wherein n in each occurrence is independently an integer from 1 to 20, inclusive; m is an integer from 2 to 20, inclusive; R A is H or a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and R B in each occurrence is independently a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and N, on average, in each occurrence is a number from 2 to 150, inclusive.
- the average value of N can be controlled by adjusting the relative amount of M A (R 1A )(R 1 ) or M B (R 1A )(R 1 ) 2 relative to the calculated amount of ⁇ , ⁇ -diene or (R C ) 2 BH in the second composition.
- R 1B [M A -R 2 -] N M A R 1B , wherein M A is Zn or Mg, or
- R 1B [M B R 1 -R 2 -] N M B (R 1B ) 2 , wherein M B is B, Al, or Ga; or an aggregate thereof, a Lewis base-containing derivative thereof, or any combination thereof; the process comprising contacting the CSAs of the formula:
- R 1A [M A -R 2 -] N M A R 1A or R 1A [M B R 1A -R 2 -] N M B (R 1A ) 2 ,
- R 1A in each occurrence is independently selected from hydrogen or a hydrocarbyl having from 1 to 20 carbon atoms, inclusive, optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and with HR 1B to provide a R 1B [M A -R 2 -] N M A R 1B or R 1B [M B R 1B -R 2 -] N M B (R 1B ) 2 ;
- R 1B in each occurrence is independently selected from halide, amide, hydrocarbylamide, dihydrocarbylamide, hydrocarbyloxide, hydrocarbylsulfide, dihydrocarbylphosphido, tri(hydrocarbyl)silyl; any hydrocarbyl group being optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and each carbon-containing R 1B having from 1 to 20 carbon atoms, inclusive;
- R 2 and N are as provided above for the CSAs
- the average value of N can be controlled here also by adjusting the relative amount of M A (R 1A ) 2 or M B (R 1A ) 3 relative to the calculated amount of ⁇ , ⁇ -diene or (R C ) 2 BH in the second composition.
- the chain shuttling agents M C [R 2 ] 2 M C where M c is Mg and M B [R 2 ] 3 M B , where M B is B, Al, or Ga, can be prepared by providing an ⁇ , ⁇ -diene such as disclosed herein, and contacting the ⁇ , ⁇ -diene with a composition that serves as a precursor of M C H 2 or M B H 3 , an example of which is triisobutyl aluminum or diisobutyl aluminum hydride.
- R 1 [M A -R 2 -] N M A R 1 where M A is Zn or Mg can be prepared by reacting a chain shuttling agent of the formula M A [R 2 ] 2 M A with a reagent having the formula R 1 [M A -R 2 -]M A R 1 . That is, the R 1 [M A -R 2 -]M A R 1 is a dual headed CSA similar to those of formula R 1 [M A -R 2 -] N M A R 1 provided here, except where the value of N is 1.
- chain shuttling agents having the formula R 1 [M 8 R 1 -R 2 - ] N M B (R 1 ) 2 , where M B is B, Al, or Ga can be prepared by contacting a chain shuttling agent having the formula M B [R 2 ] 3 M B with a reagent having the formula R 1 [M B R 1 -R 2 -] M 13 CR ⁇ 2 , where R 1 [M 13 R 1 -R 2 -] M 13 ⁇ ) 2 is also similar to those of R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 disclosed here, except with the value of N equal to 1.
- dendrimer CSAs can be prepared as follows, as illustrated in
- R 1A in each occurrence is independently a hydrocarbyl having from 1 to 20 carbon atoms, inclusive, optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide ;
- the block copolymers provided by the methods and CSAs of this disclosure can be characterized by relatively narrow molecular weight distributions.
- polymers generally considered as having broad PDI include those with PDIs from 4.0 to 20 or from 4.0 to 10.
- this disclosure encompasses dual-headed chain shuttling agents having the formula R 1 [M A -R 2 -] N M A R ⁇ R 1 [M 13 R 1 -R 2 -] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , and M B [R 2 ] 3 M B , where R 1 and R 2 are defined as disclosed herein, and N in each occurrence can be an integer from 2 to 150, inclusive.
- examples of chain shuttling agents encompassed by this disclosure include those with N>1 in these formulas.
- the ratio (Q) of multi-headed CSA sites (for example, alkdiyl or R 2 ) to mono- headed CSA sites (for example, alkyl or R 1 ) also increases, and the resulting polymer composition properties can be altered, as provided in Table 6.
- the polydispersity of the resulting ethylene copolymers prepared using increasingly longer dual-headed CSAs is shown to decrease as Q increases.
- the overall molecular weight increases while polydispersity decreases and approach the values for the dual headed CSA, calculated as having a PDI of 1.5.
- the following structure illustrates the difference between a dual-headed CSA site (D) which constitutes each alkandiyl zinc bond and a mono-headed CSA site (M) which constitutes each alkyl zinc bond.
- D dual-headed CSA site
- M mono-headed CSA site
- the dual- headed CSAs of this disclosure for example compounds of the formulas R 1 -[Zn-R 2 -] N Zn- R 1 and R 1 -[A1R 1 -R 2 -] N A1R 1 2 where Q, the ratio of R 2 sites (two per R 2 ) to R 1 sites (one per R 1 ), is greater than 1, form mostly odd-numbered multi-block polymers.
- this feature is thought to affect the polymer distribution such that it is not multimodal, and will have a narrower molecular weight distribution than polymers using dual headed CSAs of the formulas R 1 [M A -R 2 -] N M A R ! and R 1 [M B R 1 -R 2 - ] N M B (R 1 ) 2 , where the ratio of R 2 sites to R 1 sites, Q is equal to 1.
- R 1 [M A -R 2 -] N M A R 1 and R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 are characterized by having values of N>1.
- the rapid room temperature exchange of zinc-hydrocarbyl groups between and among dihydrocarbyl zinc molecules can be used to adjust the value or range of values of N in the chain shuttling agents when M is zinc.
- This rapid and reversible equilibrium aspect is used to synthetic advantage here, for example, as illustrated in Scheme 1, where a solution Of Et[ZnCH 2 CH 2 ]ZnEt establishes an equilibrium and generates a solution containing an approximately statistical mixture of Et[ZnCH 2 CH 2 J 2 ZnEt and ZnEt 2 .
- Scheme 2 illustrates how
- Et[ZnCH 2 CH 2 J 2 ZnEt in solution can set up further equilibria, for example, with another molecule of Et[ZnCH 2 CH 2 J 2 ZnEt to form Et[ZnCH 2 CH 2 J 5 ZnEt and ZnEt 2 .
- These reactions are reversible; therefore, the value of N can be lowered by combining a known amount of ZnR ! 2 such as a dialkyl zinc, with a known amount of the dual-headed CSA.
- the value of N can be increased by dissolving the dual headed zinc chain shuttling agent in a solvent such as toluene and placing the solution under vacuum. In this latter case, the more volatile ZnRZ 2 , for example ZnEt 2 , is removed by vacuum, driving the equilibrium away from lower values of N toward higher N values.
- the ratio of R 2 to R 1 moieties can be measured by 1 H NMR and 13 C ⁇ 1 H ⁇
- controlling the stoichiometry such that there is less than a 5-fold excess of either organometal reagent ((R 1 ) ⁇ or (R ⁇ 3 M 8 ) and less than a 5-fold excess of ⁇ , ⁇ -Et 2 B(CH 2 ) n BEt 2 reagent can provide DH CSAs with values of N greater than 1.
- the DH CSAs with values of N greater than 1 can be prepared when the molar ratio of organometal reagent ((R 1 ) ⁇ or (R ⁇ 3 M 8 ) to ⁇ , ⁇ -Et 2 B(CH 2 ) n BEt 2 reagent is from about 7:1 to about 0.5:1, from about 5:1 to about 1:1, or from about 4:1 to about 2:1.
- a block copolymer having at least one block of a highly crystalline ethylene or propylene polymer characterized by little or no comonomer incorporation and at least one other block of an amorphous ethylene or propylene copolymer characterized by a greater quantity of comonomer incorporation may be readily prepared in this manner.
- the skilled artisan will appreciate that by employing multiple catalysts, multiple monomers, multiple chain shuttling agents (including both dual-headed and multi-headed types), multiple reactors, or variable reactor conditions, a large number of combinations of reaction products are attainable.
- the polymer product provided here may be recovered by termination, such as by reaction with water or another proton source, or functionalized, if desired, forming vinyl, hydroxyl, silane, carboxylic acid, carboxylic acid ester, ionomeric, or other functional terminal groups, especially to replace the chain shuttling agent.
- the polymer segments may be coupled with a polyfunctional coupling agent, especially a difunctional coupling agent such as tolyl diisocyanate,
- the foregoing process may employ a multi- centered dendritic shuttling agent initially containing 2, 3, 4 or even more active centers, resulting in the formation of polymer mixtures containing some quantity of a polymer that has approximately double, triple, quadruple, or other multiple of the molecular weight of the remaining polymer and a star or branched morphology, before hydrolysis.
- the rate of chain shuttling is equivalent to or faster than the rate of polymer termination, for example, up to 10 times faster, or even up to 100 times faster or more, than the rate of polymer termination and significant with respect to the rate of polymerization. This permits formation of significant quantities of polymer chains terminated with chain shuttling agents and capable of continued monomer insertion leading to significant quantities of the higher molecular weight polymer.
- shuttling agents or mixtures of agents with a catalyst by altering the comonomer composition, temperature, pressure, optional chain transfer agent such as H 2 , or other reaction conditions in separate reactors or zones of a reactor operating under plug flow conditions, polymer products having segments of varying density or comonomer concentration, monomer content, and/or other distinguishing property can be prepared.
- polymer products having segments of varying density or comonomer concentration, monomer content, and/or other distinguishing property can be prepared.
- the resulting polymer segments will each have a most probable molecular weight distribution characteristic of typical olefin coordination polymerization catalysts, but will reflect the differing polymerization conditions of their formation.
- certain quantities of a conventional random copolymer may also be formed coincident with formation of the present polymer composition, resulting in a resin blend. If a relatively fast shuttling agent is employed, a copolymer having shorter block lengths but more uniform composition is obtained, with little formation of random copolymer. By proper selection of both catalyst and multi-centered shuttling agent, relatively pure mixtures of two polymers differing in molecular weight by approximately an integer value, copolymers containing relatively large polymer segments or blocks approximating true block copolymers, or blends of the foregoing with more random copolymers can all be obtained.
- single-headed chain shuttling agents may be employed in combination with the dual-headed or multi-headed shuttling agents disclosed herein.
- suitable single-headed chain shuttling agents include metal compounds or complexes of metals of Groups 1-13, preferably Group 1, 2, 12 or
- suitable single -headed CSAs usually include hydrocarbyl substituted aluminum, gallium or zinc compounds containing from 1 to 20 carbons or from 1 to 12 carbons in each hydrocarbyl group, and reaction products thereof with a proton source.
- Typical hydrocarbyl groups include linear or branched C 2 -s alkyl groups.
- the single -headed CSA includes trialkyl aluminum, dialkyl zinc compounds, or combinations thereof, examples of which include triethylaluminum, tri(i-propyl) aluminum, tri(i-butyl) aluminum, tri(n- hexyl)aluminum, tri(n-octyl) aluminum, triethylgallium, or diethylzinc.
- Additional suitable shuttling agents include the reaction product or mixture formed by combining at least one of the foregoing organometal compounds, for example, a tri(Ci_ 8 )alkyl aluminum or di(Ci_ 8 )alkyl zinc compound such as triethylaluminum, tri(i- propyl) aluminum, tri(i-butyl) aluminum, tri(n-hexyl)aluminum, tri(n-octyl)aluminum, or diethylzinc, with a less than stoichiometric quantity (relative to the number of hydrocarbyl groups) of a secondary amine or a hydroxyl compound, such as
- sufficient amine or hydroxyl reagent is used such that one hydrocarbyl group remains per metal atom.
- shuttling agents examples include n-octylaluminum di(bis(trimethylsilyl)amide), i- propylaluminum bis(dimethyl(t-butyl)siloxide), and n-octylaluminum di(pyridinyl-2- methoxide), i-butylaluminum bis(dimethyl(t-butyl)siloxane), i-butylaluminum bis(di(trimethylsilyl)amide), n-octylaluminum di(pyridine-2-methoxide), i- butylaluminum bis(di(n-pentyl)amide), n-octylaluminum bis(2,6-di-t-butylphenoxide), n- octylaluminum di(ethyl(l-naphthyl)amide),
- the dual-headed chain shuttling agents provided in this disclosure which include compounds of the general formula R 1 [M A -R 2 -] N M A R 1 and R 1 [M 13 R 1 -R 2 - ] N M B (R 1 ) 2 , where M A is Zn or Mg and where M B is B, Al, or Ga, can include a divalent R 2 moiety such as a hydrocarbadiyl or a 1,3-dihydrocarbadiyltetralkyldisiloxane groups.
- R 2 can be selected independently from ethandiyl, 1,3-propandiyl, 1,4- butandiyl, 1,5-pentandiyl, 1 ,6-hexandiyl, 2,5-hexandiyl, 1 ,7-heptandiyl, 1,8-octandiyl, 1 ,9-nonandiyl, 1,10-decandiyl, and the like, including larger R 2 moieties.
- R 2 also can be selected independently from 1,3-ethandiyl-tetramethyldisiloxane, 1,3- (propan- 1 ,3-diyl)tetramethyldisiloxane, 1 ,3-(butan- 1 ,4-diyl)tetramethyldisiloxane, 1,3- (pentan-l,5-diyl)tetramethyldisiloxane, l,3-(hexan-l,6-diyl)tetramethyldisiloxane, 1,3- (heptan-1 ,7-diyl)tetramethyldisiloxane, 1 ,3-(octan-l ,8-diyl)tetramethyldisiloxane, 1 ,3- (propan-1 ,3-diyl)tetraethyldisiloxane, 1 ,3-(butan-l ,4-di
- the dual-headed chain shuttling agents provided in this disclosure such as the compounds of the general formula M C [R 2 ] 2 M C or M B [R 2 ] 3 M B , where M B is B, Al, or Ga, and where M c is Mg, also can include the divalent R 2 moieties such as a hydrocarbadiyl or a 1,3-dihydrocarbadiyltetralkyldisiloxane groups such as those disclosed for the CSAs of the formula R 1 [M A -R 2 -] N M A R 1 and R 1 [M B R 1 -R 2 -] N M B (R 1 ) 2 .
- CSAs of the general formula M C [R 2 ] 2 M C and M B [R 2 ] 3 M B typically have R 2 moieties selected from the alkdiyl groups such as ethandiyl, 1,3-propandiyl, 1,4- butandiyl, 1,5-pentandiyl, 1 ,6-hexandiyl, 2,5-hexandiyl, 1 ,7-heptandiyl, 1,8-octandiyl, 1 ,9-nonandiyl, 1,10-decandiyl, and the like, or even larger alkdiyl R 2 moieties.
- R 2 moieties selected from the alkdiyl groups such as ethandiyl, 1,3-propandiyl, 1,4- butandiyl, 1,5-pentandiyl, 1 ,6-hexandiyl, 2,5-hexandiyl, 1 ,7-heptandiy
- this disclosure provides a catalyst composition and various methods that include at least one polymerization catalyst precursor, at least one cocatalyst, and at least one dendritic chain shuttling agent as disclosed herein.
- Suitable catalysts for use in the methods and compositions disclosed herein include any compound or combination of compounds that is adapted for preparing polymers of the desired composition or type. Both heterogeneous and homogeneous catalysts may be employed.
- heterogeneous catalysts include the well known Ziegler-Natta compositions, including the Group 4 metal halides and their derivatives, and including Group 4 metal halides supported on Group 2 metal halides or mixed halides and alkoxides, including the well-known chromium- or vanadium-based catalysts.
- especially useful catalysts include the homogeneous catalysts including a relatively pure organometallic compound or metal complex, especially compounds or complexes based on metals selected from Groups 3-15 or the Lanthanide series of the Periodic Table of the
- Suitable catalysts and catalyst precursors for use in the present invention include those disclosed in WO2005/090427, in particular, those disclosed starting on page 25, line 19 through page 55, line 10. Suitable are also disclosed in US
- Catalysts having high comonomer incorporation properties are also known to reincorporate in situ prepared long chain olefins resulting incidentally during the polymerization through ⁇ -hydride elimination and chain termination of growing polymer, or other process.
- concentration of such long chain olefins is particularly enhanced by use of continuous solution polymerization conditions at high conversions, especially ethylene conversions of 95 percent or greater, and more particularly at ethylene conversions of 97 percent or greater.
- Each of the metal complexes may be activated to form the active catalyst composition by combination with a cocatalyst, preferably a cation forming cocatalyst, a strong Lewis acid, or a combination thereof.
- a cocatalyst preferably a cation forming cocatalyst, a strong Lewis acid, or a combination thereof.
- this disclosure also provides for the use of at least one cocatalyst in a catalyst composition and various methods, along with at least one polymerization catalyst precursor, and at least one chain shuttling agent as disclosed herein.
- Suitable cation forming cocatalysts include those previously known in the art for metal olefin polymerization complexes.
- Examples include neutral Lewis acids, such as Ci -30 hydrocarbyl substituted Group 13 compounds, especially
- nonpolymeric, compatible, noncoordinating, ion forming compounds including the use of such compounds under oxidizing conditions, especially the use of ammonium-, phosphonium-, oxonium-, carbonium-, silylium- or sulfonium- salts of compatible, noncoordinating anions, or ferrocenium-, lead- or silver salts of compatible,
- Combinations of neutral Lewis acids especially the combination of a trialkyl aluminum compound having from 1 to 4 carbons in each alkyl group and a halogenated tri(hydrocarbyl)boron compound having from 1 to 20 carbons in each hydrocarbyl group, especially tris(pentafluorophenyl)borane, further combinations of such neutral Lewis acid mixtures with a polymeric or oligomeric alumoxane, and combinations of a single neutral Lewis acid, especially tris(pentafluorophenyl)borane with a polymeric or oligomeric alumoxane may be used as activating cocatalysts.
- Preferred molar ratios of metal complex :tris(pentafluorophenyl-borane: alumoxane are from 1:1:1 to 1:5:20, more preferably from 1:1:1.5 to 1:5:10.
- Suitable ion forming compounds useful as cocatalysts in one embodiment of the present disclosure comprise a cation which is a Br ⁇ nsted acid capable of donating a proton, and a compatible, noncoordinating anion, A " .
- noncoordinating refers to an anion or substance which either does not coordinate to the Group 4 metal containing precursor complex and the catalytic derivative derived there from, or which is only weakly coordinated to such complexes thereby remaining sufficiently labile to be displaced by a neutral Lewis base.
- a noncoordinating anion specifically refers to an anion which when functioning as a charge balancing anion in a cationic metal complex does not transfer an anionic substituent or fragment thereof to said cation thereby forming neutral complexes.
- “Compatible anions” are anions which are not degraded to neutrality when the initially formed complex decomposes and are noninterfering with desired subsequent polymerization or other uses of the complex.
- Preferred anions are those containing a single coordination complex comprising a charge-bearing metal or metalloid core which anion is capable of balancing the charge of the active catalyst species (the metal cation) which may be formed when the two components are combined.
- said anion should be sufficiently labile to be displaced by olefinic, diolefinic and acetylenically unsaturated compounds or other neutral Lewis bases such as ethers or nitriles.
- Suitable metals include, but are not limited to, aluminum, gold and platinum.
- Suitable metalloids include, but are not limited to, boron, phosphorus, and silicon.
- Compounds containing anions which comprise coordination complexes containing a single metal or metalloid atom are, of course, well known and many, particularly such compounds containing a single boron atom in the anion portion, are available commercially.
- suitable cocatalysts may be represented by the following general formula:
- L* is a neutral Lewis base
- (L*-H) + is a conjugate Br ⁇ nsted acid of L*
- a g ⁇ is a noncoordinating, compatible anion having a charge of g-, and g is an integer from 1 to 3.
- a g ⁇ corresponds to the formula: [MiQ 4 ] " ; wherein:
- Mi is boron or aluminum in the +3 formal oxidation state
- Q independently in each occurrence is selected from hydride, dialkyl- amido, halide, hydrocarbyl, hydrocarbyloxide, halosubstituted-hydrocarbyl,
- each Q having up to 20 carbons with the proviso that in not more than one occurrence is Q halide.
- suitable hydrocarbyloxide Q groups are disclosed in US-A-5,296,433.
- d is one, that is, the counter ion has a single negative charge and is A " .
- Activating cocatalysts comprising boron which are particularly useful in the preparation of catalysts of this disclosure may be represented by the following general formula:
- B is boron in a formal oxidation state of 3
- Q is a hydrocarbyl-, hydrocarbyloxy-, fluorinated hydrocarbyl-, fluorinated hydrocarbyloxy-, or fluorinated silylhydrocarbyl-group of up to 20 nonhydrogen atoms, with the proviso that in not more than one occasion is Q hydrocarbyl.
- Especially useful Lewis base salts are ammonium salts, more preferably trialkyl- ammonium salts containing one or more C 12 _ 4 o alkyl groups.
- Q in each occurrence can be a fluorinated aryl group, especially, a pentafluorophenyl group.
- boron compounds which may be used as an activating cocatalyst in the preparation of the improved catalysts of this disclosure include the tri-substituted ammonium salts such as:
- tripropylammonium tetrakis(pentafluorophenyl) borate tripropylammonium tetrakis(pentafluorophenyl) borate
- dialkyl ammonium salts such as:
- di-(i-propyl)ammonium tetrakis(pentafluorophenyl) borate di-(i-propyl)ammonium tetrakis(pentafluorophenyl) borate, methyloctadecylammonium tetrakis(pentafluorophenyl) borate, methyloctadodecylammonium tetrakis(pentafluorophenyl) borate, and dioctadecylammonium tetrakis(pentafluorophenyl) borate;
- triphenylphosphonium tetrakis(pentafluorophenyl) borate triphenylphosphonium tetrakis(pentafluorophenyl) borate
- di-substituted oxonium salts such as:
- examples of useful (L*-H) + cations include, but are not limited to, methyldioctadecylammonium cations,
- dimethyloctadecylammonium cations dimethyloctadecylammonium cations, and ammonium cations derived from mixtures of trialkyl amines containing one or two C 14 . 18 alkyl groups.
- Another suitable ion forming, activating cocatalyst comprises a salt of a cationic oxidizing agent and a noncoordinating, compatible anion represented by the formula:
- Ox h+ is a cationic oxidizing agent having a charge of h+;
- h is an integer from 1 to 3;
- a ⁇ and g are as previously defined.
- Examples of cationic oxidizing agents include: ferrocenium, hydrocarbyl- substituted ferrocenium, Ag + , or Pb +2 .
- Particularly useful examples of A ⁇ are those anions previously defined with respect to the Br ⁇ nsted acid containing activating cocatalysts, especially tetrakis(pentafluorophenyl)borate.
- Another suitable ion forming, activating cocatalyst can be a compound which is a salt of a carbenium ion and a noncoordinating, compatible anion represented by the following formula:
- [C] + is a Ci_ 2 o carbenium ion
- trityl cation that is triphenylmethylium
- a further suitable ion forming, activating cocatalyst comprises a compound which is a salt of a silylium ion and a noncoordinating, compatible anion represented by the formula:
- Q 1 is Ci_io hydrocarbyl, and A " is as previously defined.
- Suitable silylium salt activating cocatalysts include trimethylsilylium tetrakispentafluorophenylborate, triethylsilylium tetrakispentafluorophenylborate, and ether substituted adducts thereof.
- Silylium salts have been previously generically disclosed in /. Chem. Soc. Chem. Comm. 1993, 383-384, as well as in Lambert, J. B., et al., Organometallics 1994, 13, 2430-2443. The use of the above silylium salts as activating cocatalysts for addition polymerization catalysts is also described in U.S. Patent No. 5,625,087.
- Suitable activating cocatalysts for use herein also include polymeric or oligomeric alumoxanes (also called aluminoxanes), especially methylalumoxane (MAO), triisobutyl aluminum modified methylalumoxane (MMAO), or isobutylalumoxane; Lewis acid modified alumoxanes, especially perhalogenated tri(hydrocarbyl)aluminum- or perhalogenated tri(hydrocarbyl)boron modified alumoxanes, having from 1 to 10 carbons in each hydrocarbyl or halogenated hydrocarbyl group, and most especially tris(pentafluorophenyl)borane modified alumoxanes.
- cocatalysts are previously disclosed in U.S. Patents No. 6,214,760, 6,160,146, 6,140,521, and 6,696,379.
- a class of cocatalysts comprising non-coordinating anions generically referred to as expanded anions, further disclosed in U.S. Patent No. 6,395,671, may be suitably employed to activate the metal complexes of the present disclosure for olefin polymerization.
- these cocatalysts (illustrated by those having imidazolide, substituted imidazolide, imidazolinide, substituted imidazolinide, benzimidazolide, or substituted benzimidazolide anions) may be depicted as follows:
- a + is a cation, especially a proton containing cation, and can be trihydrocarbyl ammonium cation containing one or two Cio- 40 alkyl groups, especially a methyldi(C 14 . 20 alkyl)ammonium cation,
- Q 3 independently in each occurrence, is hydrogen or a halo, hydrocarbyl, halocarbyl, halohydrocarbyl, silylhydrocarbyl, or silyl, (including for example mono-, di- and tri(hydrocarbyl)silyl) group of up to 30 atoms not counting hydrogen, such as C 1 ⁇ o alkyl, and
- Q 2 is tris(pentafluorophenyl)borane or tris(pentafluorophenyl)alumane).
- catalyst activators include trihydrocarbylammonium- salts, especially, methyldi (C 14.20 alkyl)ammonium-salts of:
- activators include those described in the PCT publication WO 98/07515, such as tris (2,2',2"-nonafluorobiphenyl)fluoroaluminate. Combinations of activators are also contemplated by the disclosure, for example, alumoxanes and ionizing activators in combinations, see for example, EP-A-O 573120, PCT publications WO 94/07928 and WO 95/14044, and U.S. Patents No. 5,153,157 and 5,453,410.
- WO 98/09996 describes activating catalyst compounds with perchlorates, periodates and iodates, including their hydrates.
- WO 99/18135 describes the use of organoboroaluminum activators.
- WO 03/10171 discloses catalyst activators that are adducts of Br ⁇ nsted acids with Lewis acids.
- Other activators or methods for activating a catalyst compound are described in, for example, U.S. Patents No. 5,849,852, 5,859, 653, and 5,869,723, in EP-A-615981, and in PCT publication WO 98/32775. All of the foregoing catalyst activators as well as any other known activator for transition metal complex catalysts may be employed alone or in combination according to the present disclosure.
- the cocatalyst can be alumoxane-free.
- the cocatalyst can be free of any specifically-named activator or class of activators as disclosed herein.
- the molar ratio of catalyst/cocatalyst employed generally ranges from 1:10,000 to 100:1, for example, from 1:5000 to 10:1, or from 1 : 1000 to 1:1.
- Alumoxane, when used by itself as an activating cocatalyst, can be employed in large quantity, generally at least 100 times the quantity of metal complex on a molar basis.
- Tris(pentafluorophenyl)borane, where used as an activating cocatalyst can be employed generally in a molar ratio to the metal complex of from 0.5:1 to 10:1, more preferably from 1:1 to 6: 1 most preferably from 1:1 to 5 : 1.
- the remaining activating cocatalysts are generally employed in approximately equimolar quantity with the metal complex.
- the polymer products can contain at least some quantity of a polymer containing two or more blocks or segments joined by means of a remnant of a dual-headed or multi-headed shuttling agent.
- the product comprises distinct polymer species having different molecular weights, ideally the larger molecular weights being integer multiples of the smallest.
- the product comprises a first polymer having a first molecular weight and at least some quantity of a second polymer having a molecular weight that is approximately an integer multiple of the molecular weight of the first polymer, wherein the integer is equal to the number of shuttling centers in the shuttling agent.
- the polymer recovered from the present process may be terminated to form conventional type polymers, coupled through use of a polyfunctional coupling agent to form multiblock copolymers, including hyper-branched or dendrimeric copolymers, or functionalized by conversion of remnants of the dual-headed or multi-headed shuttling agents into vinyl-, hydroxyl-, amine-, silane, carboxylic acid-, carboxylic acid ester, ionomeric, or other functional groups, according to known techniques.
- a process and the resulting polymer comprising polymerizing one or more olefin monomers in the presence of an olefin polymerization catalyst and a dual-headed or multi-headed shuttling agent (CSA or MSA) in a polymerization reactor or zone thereby causing the formation of at least some quantity of a polymer joined with the remnant of the dual-headed or multi-headed shuttling agent.
- CSA dual-headed or multi-headed shuttling agent
- a process and the resulting polymer comprising polymerizing one or more olefin monomers in the presence of an olefin polymerization catalyst and a dual-headed or multi-headed shuttling agent (MSA) in a polymerization reactor or zone thereby causing the formation of at least some quantity of an initial polymer joined with the remnant of the dual-headed or multi-headed shuttling agent within the reactor or zone; discharging the reaction product from the first reactor or zone to a second polymerization reactor or zone operating under polymerization conditions that are distinguishable from those of the first polymerization reactor or zone; transferring at least some of the initial polymer joined with the remnant of the dual-headed or multi-headed shuttling agent to an active catalyst site in the second polymerization reactor or zone by means of at least one remaining shuttling site of the dual-headed or multi-headed shuttling agent; and conducting polymerization in the second polymerization reactor or zone so as to form a second polymer segment bonded
- MSA dual-headed or multi-headed shuttling
- the reaction mixture is contacted with the activated catalyst composition according to any suitable polymerization conditions.
- the process can be generally characterized by use of elevated temperatures and pressures. Hydrogen may be employed as a chain transfer agent for molecular weight control according to known techniques, if desired. As in other similar polymerizations, it is generally desirable that the monomers and solvents employed be of sufficiently high purity that catalyst deactivation or premature chain termination does not occur. Any suitable technique for monomer purification such as devolatilization at reduced pressure, contacting with molecular sieves or high surface area alumina, or a combination of the foregoing processes may be employed.
- Supports may be employed in the present methods, especially in slurry or gas-phase polymerizations.
- Suitable supports include solid, particulated, high surface area, metal oxides, metalloid oxides, or mixtures thereof (interchangeably referred to herein as an inorganic oxide). Examples include, but are not limited to talc, silica, alumina, magnesia, titania, zirconia, Sn 2 O 3 , aluminosilicates, borosilicates, clays, and any combination or mixture thereof.
- Suitable supports preferably have a surface area as determined by nitrogen porosimetry using the B.E.T. method from 10 to 1000 m 2 /g, and preferably from 100 to 600 m /g.
- the average particle size typically is from 0.1 to 500 ⁇ m, preferably from 1 to 200 ⁇ m, more preferably 10 to 100 ⁇ m.
- the catalyst composition and optional support may be spray dried or otherwise recovered in solid, participated form to provide a composition that is readily transported and handled. Suitable methods for spray drying a liquid containing slurry are well known in the art and usefully employed herein. Preferred techniques for spray drying catalyst compositions for use herein are described in U.S. Patents No. 5,648,310 and 5,672,669.
- the polymerization is desirably carried out as a continuous
- polymerization for example, a continuous, solution polymerization, in which catalyst components, monomers, and optionally solvent, adjuvants, scavengers, and
- polymerization aids are continuously supplied to one or more reactors or zones and polymer product continuously removed therefrom.
- shuttling agent and chain shuttling agent(s) may be added at any point during the polymerization including in the first reactor or zone, at the exit or slightly before the exit of the first reactor, between the first reactor or zone and any subsequent reactor or zone, or even solely to the second reactor or zone, if present, both are typically added at the initial stages of the polymerization.
- polymer segments of differing composition such as comonomer content, crystallinity, density, tacticity, regio-regularity, or other chemical or physical differences, within the same molecule can be formed in the polymers of this disclosure.
- the size of each segment or block is determined by the polymer reaction conditions, and typically is a most probable distribution of polymer sizes.
- each reactor can be independently operated under high pressure, solution, slurry, or gas phase polymerization conditions.
- all zones operate under the same type of polymerization, such as solution, slurry, or gas phase, but, optionally, at different process conditions.
- a solution polymerization process it is desirable to employ homogeneous dispersions of the catalyst components in a liquid diluent in which the polymer is soluble under the polymerization conditions employed.
- One such process utilizing an extremely fine silica or similar dispersing agent to produce such a homogeneous catalyst dispersion wherein normally either the metal complex or the cocatalyst is only poorly soluble is disclosed in U.S. Patent No. 5,783,512.
- a high pressure process is usually carried out at temperatures from 100 0 C to 400 0 C and at pressures above 500 bar (50 MPa).
- a slurry process typically uses an inert hydrocarbon diluent and temperatures of from 0 0 C up to a temperature just below the temperature at which the resulting polymer becomes substantially soluble in the inert polymerization medium.
- typical temperatures in a slurry polymerization are from 30 0 C, generally from 60 0 C up to 115°C, including up to 100 0 C, depending on the polymer being prepared.
- Pressures typically range from atmospheric (100 kPa) to 500 psi (3.4 MPa).
- the catalyst may be prepared as a homogeneous composition by addition of the requisite metal complex or multiple complexes to a solvent in which the polymerization will be conducted or in a diluent compatible with the ultimate reaction mixture.
- the desired cocatalyst or activator and, optionally, a shuttling agent may be combined with the catalyst composition either prior to, simultaneously with, or after combination of the catalyst with the monomers to be polymerized and any additional reaction diluent.
- the MSA is added at the same time.
- the individual ingredients as well as any active catalyst composition are protected from oxygen, moisture, and other catalyst poisons. Therefore, the catalyst components, multi-centered shuttling agent, and activated catalysts are prepared and stored in an oxygen and moisture free atmosphere, generally under a dry, inert gas such as nitrogen.
- one means for carrying out such a polymerization process is as follows.
- the monomers to be polymerized are introduced continuously together with any solvent or diluent at one part of the reactor.
- the reactor contains a relatively homogeneous liquid phase composed substantially of monomers together with any solvent or diluent and dissolved polymer.
- Preferred solvents include C 4-I o hydrocarbons or mixtures thereof, especially alkanes such as hexane or mixtures of alkanes, as well as one or more of the monomers employed in the polymerization.
- suitable loop reactors and a variety of suitable operating conditions for use therewith, including the use of multiple loop reactors, operating in series are found in U.S. Patents No. 5,977,251, 6,319,989 and 6,683,149.
- Catalyst along with cocatalyst and multi-centered shuttling agent are continuously or intermittently introduced in the reactor liquid phase or any recycled portion thereof at a minimum of one location.
- the reactor temperature and pressure may be controlled, for example, by adjusting the solvent/monomer ratio or the catalyst addition rate, as well as by use of cooling or heating coils, jackets or both.
- the polymerization rate can be controlled by the rate of catalyst addition.
- the content of a given monomer in the polymer product is influenced by the ratio of monomers in the reactor, which is controlled by manipulating the respective feed rates of these components to the reactor.
- the polymer product molecular weight is controlled, optionally, by controlling other polymerization variables such as the temperature, monomer concentration, or by the previously mentioned multi-centered shuttling agent, or a chain terminating agent such as hydrogen, as is known in the art.
- a second reactor is connected to the discharge of a first reactor, optionally by means of a conduit or other transfer means, such that the reaction mixture prepared in the first reactor is discharged to the second reactor without substantial termination of polymer growth.
- a differential in at least one process condition may be established.
- the difference is the presence or absence of one or more comonomers or a difference in comonomer concentration.
- Additional reactors, each arranged in a manner similar to the second reactor in the series may be provided as well. Further polymerization is ended by contacting the reactor effluent with a catalyst kill agent such as water, steam or an alcohol or with a coupling agent if a coupled reaction product is desired.
- a catalyst kill agent such as water, steam or an alcohol or with a coupling agent if a coupled reaction product is desired.
- the resulting polymer product is recovered by flashing off volatile components of the reaction mixture such as residual monomer(s) or diluent at reduced pressure, and, if necessary, conducting further devolatilization in equipment such as a devolatilizing extruder.
- the mean residence time of the catalyst and polymer in the reactor generally is from 5 minutes to 8 hours, for example, from 10 minutes to 6 hours.
- the foregoing polymerization may be carried out in a plug flow reactor optionally with a monomer, catalyst, multi-centered shuttling agent, temperature or other gradient established between differing zones or regions thereof, further optionally accompanied by separate addition of catalysts and/or chain shuttling agent, and operating under adiabatic or non- adiabatic polymerization conditions.
- the catalyst composition may also be prepared and employed as a heterogeneous catalyst by adsorbing the requisite components on an inert inorganic or organic particulated solid, as previously disclosed.
- a heterogeneous catalyst can be prepared by co-precipitating the metal complex and the reaction product of an inert inorganic compound and an active hydrogen containing activator, especially the reaction product of a tri (Ci -4 alkyl) aluminum compound and an ammonium salt of a hydroxyaryltris(pentafluorophenyl)borate, such as an ammonium salt of (4-hydroxy-3,5-ditertiarybutylphenyl)tris(pentafluorophenyl)borate.
- the catalyst composition When prepared in heterogeneous or supported form, the catalyst composition may be employed in a slurry or a gas phase polymerization.
- slurry polymerization takes place in liquid diluents in which the polymer product is substantially insoluble.
- the diluent for slurry polymerization is one or more hydrocarbons with less than 5 carbon atoms. If desired, saturated hydrocarbons such as ethane, propane, or butane may be used in whole or part as the diluent.
- the ⁇ -olefin comonomer or a combination of different ⁇ -olefin monomers may be used in whole or part as the diluent. Most preferably at least a major part of the diluent comprises the ⁇ -olefin monomer or monomers to be polymerized.
- the support material and resulting catalyst typically can have a median particle diameter from 20 to 200 ⁇ m, generally from 30 ⁇ m to 150 ⁇ m, and typically from 50 ⁇ m to 100 ⁇ m.
- the support can have a median particle diameter from 1 ⁇ m to 200 ⁇ m, generally from 5 ⁇ m to 100 ⁇ m, and typically from 10 ⁇ m to 80 ⁇ m.
- the gas phase process employed can be, for example, of the type which employs a mechanically stirred bed or a gas fluidized bed as the polymerization reaction zone.
- Suitable gas phase processes which are adaptable for use in the process of this disclosure are disclosed in, for example, U.S. Patent Nos. 4,588,790; 4,543,399; 5,352,749; 5,436,304; 5,405,922; 5,462,999; 5,461,123; 5,453,471; 5,032,562;
- metallated polymers wherein the metal is the remnant of the catalyst or chain shuttling agent employed, as well as further derivatives thereof. Because a substantial fraction of the polymeric product exiting the reactor is terminated with the multi-centered shuttling agent, further functionalization is relatively easy.
- the metallated polymer species can be utilized in well known chemical reactions such as those suitable for other alkyl-aluminum, alkyl-gallium, alkyl-zinc, or alkyl-Group 1 compounds to form amine-, hydroxy-, epoxy-, silane, vinylic, and other functionalized terminated polymer products. Examples of suitable reaction techniques that are adaptable for use herein are described in Negishi, "Organometallics in Organic Synthesis", Vol. 1 and 2, (1980), and other standard texts in organometallic and organic synthesis.
- novel polymer compositions including block copolymers of one or more olefin monomers having the present molecular weight distribution, are readily prepared.
- Desirable polymers comprise in polymerized form at least one monomer selected from ethylene, propylene, and 4- methyl-1-pentene.
- the polymers are interpolymers comprising in polymerized form ethylene, propylene, or 4-methyl-l-pentene and at least one different C 2 - 20 ⁇ -olefin comonomer, and optionally one or more additional copolymerizable comonomers.
- Suitable comonomers are selected from diolefins, cyclic olefins, and cyclic diolefins, halogenated vinyl compounds, vinylidene aromatic compounds, and combinations thereof.
- Generally preferred polymers are interpolymers of ethylene with 1-butene, 1-hexene or 1-octene.
- the polymer compositions disclosed here have an ethylene content from 1 to 99 percent, a diene content from 0 to 10 percent, and a styrene and/or C 3 . 8 ⁇ -olefin content from 99 to 1 percent, based on the total weight of the polymer.
- the polymers of the disclosure have a weight average molecular weight (Mw) from 10,000 to 2,500,000.
- the polymers prepared according to this disclosure can have a melt index, I 2 , from 0.01 to 2000 g/10 minutes, typically from 0.01 to 1000 g/10 minutes, more typically from 0.01 to 500 g/10 minutes, and especially from 0.01 to 100 g/10 minutes.
- the disclosed polymers can have molecular weights, M w , from 1,000 g/mole to 5,000,000 g/mole, typically from 1000 g/mole to 1,000,000, more typically from 1000 g/mole to 500,000 g/mole, and especially from 1,000 g/mole to 300,000 g/mole.
- the density of the polymers of this disclosure can be from 0.80 to 0.99 g/cm 3 and typically, for ethylene containing polymers, from 0.85 g/cm 3 to 0.97 g/cm 3 .
- the polymers according to this disclosure may be differentiated from conventional, random copolymers, physical blends of polymers, and block copolymers prepared via sequential monomer addition, fluxional catalysts, or by anionic or cationic living polymerization techniques, by, among other things, their narrow molecular weight distributions.
- the polymer composition prepared according to this disclosure can be characterized by a polydispersity index (PDI) of from 1.5 to 3.0.
- the polydispersity index (PDI) of the polymer composition can be from 1.5 to 2.8, from 1.5 to 2.5, or from 1.5 to 2.3.
- the separate regions or blocks within each polymer are relatively uniform, depending on the uniformity of reactor conditions, and chemically distinct from each other. That is, the comonomer distribution, tacticity, or other property of segments within the polymer are relatively uniform within the same block or segment.
- the average block length can be a narrow distribution, but is not necessarily so. The average block length can also be a most probable distribution.
- the resulting polymer may be linear or contain one or more branching centers, depending on whether a two-centered-, three -centered-, or higher centered shuttling agent is employed.
- these interpolymers can be characterized by terminal blocks or segments of polymer having higher tacticity or crystallinity from at least some remaining blocks or segments.
- the polymer can be a triblock copolymer containing a central polymer block or segment that is relatively amorphous or even elastomeric.
- the MSA can be a three centered shuttling agent and the resulting polymers are characterized by the presence of long chain branching.
- a method for generating long chain branching in olefin polymers without use of a polymerizable functional group, such as a vinyl group is provided.
- the LCB branch point may be the remnant of such a three-centered MSA.
- a polymer composition comprising: (1) an organic or inorganic polymer, preferably a homopolymer of ethylene or of propylene and/or a copolymer of ethylene or propylene with one or more copolymerizable comonomers, and (2) a polymer or combination of polymers according to the present disclosure or prepared according to the process disclosed here.
- inventive polymer products include combinations of two or more polymers comprising regions or segments (blocks) of differing chemical composition.
- at least one of the constituents of the polymer combination can contain a linking group which is the remnant of a dual-headed or multi-headed shuttling agent, causing the polymer to possess certain physical properties.
- additives may be usefully incorporated into the present compositions in amounts that do not detract from the properties of the resultant composition.
- additives include, for example, reinforcing agents, fillers including conductive and non-conductive materials, ignition resistant additives, antioxidants, heat and light stabilizers, colorants, extenders, crosslinkers, blowing agents, plasticizers, flame retardants, anti-drip agents, lubricants, slip additives, anti-blocking aids, anti- degradants, softeners, waxes, pigments, and the like, including combinations thereof.
- polymeric products and blends comprising these polymeric products are usefully employed in the preparation of solid articles such as moldings, films, sheets, and foamed objects by molding, extruding, or other processes, and are useful as components or ingredients in adhesives, laminates, polymeric blends, and other end uses.
- the resulting products can also be used in the manufacture of components for automobiles, such as profiles, bumpers and trim parts; packaging materials; electric cable insulation; and numerous other applications.
- the polymer composition of this disclosure can be employed in a variety of conventional thermoplastic fabrication processes to produce useful articles, including objects containing at least one film layer, such as a monolayer film, or at least one layer in a multilayer film, prepared by cast, blown, calendered, or extrusion coating processes; molded articles, such as blow molded, injection molded, or rotomolded articles; extrusions; fibers; and woven or non-woven fabrics.
- Thermoplastic compositions containing the present polymers include blends with other natural or synthetic polymers and additives, including the previously mentioned reinforcing agents, fillers, ignition resistant additives, antioxidants, heat and light stabilizers, colorants, extenders, crosslinkers, blowing agents, plasticizers, flame retardants, anti-drip agents, lubricants, slip additives, anti-blocking aids, antidegradants, softeners, waxes, and pigments.
- Fibers that may be prepared from the present polymers or blends include staple fibers, tow, multicomponent, sheath/core, twisted, and monofilament.
- Suitable fiber forming processes include spinbonded, melt blown techniques, as disclosed in U.S. Patent Nos. 4,430,563, 4, 663,220, 4,668,566, and 4,322,027, gel spun fibers as disclosed in U.S. Patent No. 4,413,110, woven and nonwoven fabrics, as disclosed in U.S. Patent No.
- 3,485,706, or structures made from such fibers including blends with other fibers, such as polyester, nylon or cotton, thermoformed articles, extruded shapes, including profile extrusions and co-extrusions, calendared articles, and drawn, twisted, or crimped yarns or fibers.
- the new polymers described herein are also useful for wire and cable coating operations, as well as in sheet extrusion for vacuum forming operations, and forming molded articles, including the use of injection molding, blow molding process, or rotomolding processes.
- Compositions containing the olefin polymers can also be formed into fabricated articles such as those previously mentioned using conventional polyolefin processing techniques which are well known to those skilled in the art of polyolefin processing.
- Dispersions can also be formed using the present polymers or formulations containing the same.
- Frothed foams containing the polymers disclosed herein can also be formed, using for example the process disclosed in WO 04/021622.
- the polymers may also be crosslinked by any known means, such as by the use of peroxide, electron beam, silane, azide, or other cross-linking technique.
- the polymers can also be chemically modified, such as by grafting (for example by use of maleic anhydride (MAH), silanes, or other grafting agent), halogenation, amination, sulfonation, or other chemical modification.
- Suitable polymers for blending with the polymers prepared according to this disclosure include thermoplastic and non-thermoplastic polymers including natural and synthetic polymers.
- Exemplary polymers for blending include polypropylene, (both impact modifying polypropylene, isotactic polypropylene, atactic polypropylene, and random ethylene/propylene copolymers), various types of polyethylene, including high pressure, free-radical LDPE, Ziegler Natta LLDPE, metallocene PE, including multiple reactor PE ("in reactor” blends of Ziegler-Natta PE and metallocene PE, such as products disclosed in U.S. Patent Nos.
- ethylene -vinyl acetate EVA
- polystyrene impact modified polystyrene
- ABS styrene/butadiene block copolymers and hydrogenated derivatives thereof
- SEBS hydrogenated derivatives thereof
- Homogeneous polymers such as olefin plastomers and elastomers, ethylene and propylene-based copolymers (for example polymers available under the trade designation VERSIFYTM available from The Dow Chemical Company and VISTAMAXXTM available from ExxonMobil) can also be useful as components in blends containing the present polymer composition.
- olefin plastomers and elastomers for example polymers available under the trade designation VERSIFYTM available from The Dow Chemical Company and VISTAMAXXTM available from ExxonMobil
- VERSIFYTM available from The Dow Chemical Company
- VISTAMAXXTM available from ExxonMobil
- the blends may be prepared by mixing or kneading the respective components at a temperature around or above the melt point temperature of one or both of the components. For most of the present compositions, this temperature may be above 130 0 C, 145 0 C, or even above 150 0 C.
- Typical polymer mixing or kneading equipment that is capable of reaching the desired temperatures and melt plastifying the mixture may be employed. These include mills, kneaders, extruders (both single screw and twin- screw), B anbury mixers, and calenders. The sequence of mixing and method may depend on the final composition. A combination of B anbury batch mixers and continuous mixers may also be employed, such as a B anbury mixer followed by a mill mixer followed by an extruder.
- the blend compositions may contain processing oils, plasticizers, and processing aids.
- Some rubber processing oils and paraffinic, napthenic or aromatic process oils are all suitable for use. Generally from 0 to 150 parts, more typically 0 to 100 parts, and most typically from 0 to 50 parts of oil per 100 parts of total polymer composition are employed. Higher amounts of oil may tend to improve the processing of the resulting product at the expense of some physical properties.
- Additional processing aids include conventional waxes, fatty acid salts, such as calcium stearate or zinc stearate, (poly) alcohols including glycols, (poly) alcohol ethers, including glycol ethers,
- (poly)esters including (poly)glycol esters, and metal salt-, especially Group 1 or 2 metal or zinc-, salt derivatives thereof.
- compositions according to this disclosure may also contain anti- ozonants and anti-oxidants that are known to a person of ordinary skill.
- the anti- ozonants may be physical protectants such as waxy materials that come to the surface and protect the part from oxygen or ozone or they may be chemical protectors that react with oxygen or ozone.
- Suitable chemical protectors include styrenated phenols, butylated octylated phenol, butylated di(dimethylbenzyl) phenol, p-phenylenediamines, butylated reaction products of p-cresol and dicyclopentadiene (DCPD), polyphenolic anitioxidants, hydroquinone derivatives, quinoline, diphenylene antioxidants, thioester antioxidants, and blends thereof.
- DCPD dicyclopentadiene
- WingstayTM S antioxidant Some representative trade names of such products are WingstayTM S antioxidant, PolystayTM 100 antioxidant, PolystayTM 100 AZ antioxidant, PolystayTM 200 antioxidant, WingstayTM L antioxidant, WingstayTM LHLS antioxidant, WingstayTM K antioxidant, WingstayTM 29 antioxidant, WingstayTM SN-I antioxidant, and IrganoxTM antioxidants.
- the antioxidants and antiozonants used will typically be non-staining and non-migratory.
- HALS hindered amine light stabilizers
- UV absorbers may be also used. Suitable examples include TinuvinTM 123, TinuvinTM 144, TinuvinTM 622, TinuvinTM 765, TinuvinTM 770, and TinuvinTM 780, available from Ciba Specialty Chemicals, and ChemisorbTM T944, available from Cytex Plastics, Houston, TX, USA.
- a Lewis acid may be additionally included with a HALS compound in order to achieve superior surface quality, as disclosed in USP 6,051,681.
- additional mixing processes may be employed to pre -disperse the anti-oxidants, anti-ozonants, pigment, UV absorbers, and/or light stabilizers to form a masterbatch, and subsequently to form polymer blends therefrom.
- compositions according to the disclosure may be subsequently crosslinked to form cured compositions.
- Suitable crosslinking agents also referred to as curing or vulcanizing agents
- Suitable crosslinking agents include sulfur based, peroxide based, or phenolic based compounds. Examples of the foregoing materials are found in the art, including in U.S. Patent Nos. 3,758,643, 3,806,558, 5,051,478, 4,104,210, 4,130,535, 4,202,801, 4,271,049, 4,340,684, 4,250,273, 4,927,882, 4,311,628, and 5,248,729.
- accelerators and cure activators may be used as well. Accelerators are used to control the time and/or temperature required for dynamic vulcanization and to improve the properties of the resulting cross-linked article.
- a single accelerator or primary accelerator is used.
- the primary accelerator(s) may be used in total amounts ranging from 0.5 to 4, typically 0.8 to 1.5, phr, based on total composition weight.
- combinations of a primary and a secondary accelerator might be used with the secondary accelerator being used in smaller amounts, such as from 0.05 to 3 phr, in order to activate and to improve the properties of the cured article.
- Combinations of accelerators generally produce articles having properties that are somewhat better than those produced by use of a single accelerator.
- delayed action accelerators may be used which are not affected by normal processing temperatures yet produce a satisfactory cure at ordinary vulcanization temperatures.
- Vulcanization retarders might also be used.
- Suitable types of accelerators that may be used as disclosed herein are amines, disulfides, guanidines, thioureas, thiazoles, thiurams, sulfenamides, dithiocarbamates and xanthates.
- the primary accelerator is a sulfenamide. If a second accelerator is used, the secondary accelerator is typically a guanidine, dithiocarbarnate or thiuram compound.
- Certain processing aids and cure activators such as stearic acid and ZnO may also be used. When peroxide based curing agents are used, co-activators or coagents may be used in combination therewith.
- Suitable coagents include trimethylolpropane triacrylate (TMPTA), trimethylolpropane trimethacrylate (TMPTMA), triallyl cyanurate (TAC), triallyl isocyanurate (TAIC), among others.
- TMPTA trimethylolpropane triacrylate
- TMPTMA trimethylolpropane trimethacrylate
- TAC triallyl cyanurate
- TAIC triallyl isocyanurate
- the degree of crosslinking in a cured composition according to the disclosure may be measured by dissolving the composition in a solvent for a specified duration, and calculating the percent gel or unextractable rubber.
- the percent gel normally increases with increasing crosslinking levels.
- the percent gel content is desirably in the range from 5 to 100 percent.
- present compositions and blends thereof may also uniquely possess improved melt strength properties due to the presence of the high molecular weight component and unique molecular weight distribution, thereby allowing the present compositions and blends thereof to be usefully employed in foam and in thermoforming applications where high melt strength is desired.
- Thermoplastic compositions according to this disclosure may also contain organic or inorganic fillers or other additives such as starch, talc, calcium carbonate, glass fibers, polymeric fibers (including nylon, rayon, cotton, polyester, and polyaramide), metal fibers, wire, mesh, flakes or particles, expandable layered silicates, phosphates or carbonates, such as clays, mica, silica, alumina, aluminosilicates or aluminophosphates, carbon whiskers, carbon fibers, nanoparticles including nanotubes and nonofibers, wollastonite, graphite, zeolites, and ceramics, such as silicon carbide, silicon nitride or titanias.
- Silane based oils or other coupling agents may also be employed for better filler bonding.
- Additional suitable additives include tackifiers; oils, including paraffinic or napthelenic oils; and other natural and synthetic polymers, including other polymers according to this disclosure.
- polymer compositions of this disclosure may be processed by conventional molding techniques such as injection molding, extrusion molding, thermoforming, slush molding, over molding, insert molding, blow molding, and other techniques.
- Films, including multi-layer films may be produced by cast or tentering processes, including blown film processes.
- reaction can be conducted in a batch reactor with ethylene and propylene, for example, along with an activated catalyst.
- Ethylene has a substantially higher reactivity than propylene in such polymerizations; therefore, the propylene typically is added to excess and the reaction is run beyond full consumption of the ethylene.
- the final polymer morphology is characterized as containing an ethylene/propylene rubber segment with isotactic propylene on each end.
- reagents such as diethyl zinc or other single site CSA moieties can be used in varying amounts in the methods and processes of this disclosure to create inhomogeneity in the polymer.
- the relative amount of the inhomogeneity can be controlled by adding more or less diethyl zinc to the reactor. Additional blocks can be added to the end of the polymer by, for example, the addition of another monomer or transferring the reaction mixture to another reactor.
- dual-headed zinc or aluminum CSAs can be prepared from any precursor structure containing two terminal vinyl groups, and can be used for polymerization as long as the linker does not prevent the olefin polymerization process.
- the linker can be the product derived from 1 ,3- divinyltetramethyldisiloxane .
- Dual-headed zinc CSAs also can be prepared from any precursor structure containing two alkyl-halide groups. While many of the dual-headed CSAs disclosed here are polymeric, a polymeric or oligomeric CSA is not necessary, as shown. For example, the addition of a sulfur, phosphorous, nitrogen, or oxygen-containing "cap" to the CSA also can lead to the desired polymer architecture.
- a CSA containing Aryl-O-Zn-alkandiyl-Zn-O-Aryl, where Aryl is any substituted or unsubstituted aryl group that is compatible with the olefin polymerization process also can function in the same manner as a polymeric dual-headed CSA and may be especially useful in process conditions that are not ideal for the polymeric or oligomeric CSAs disclosed here.
- Another aspect of the disclosure provides for the catalyst and activator (or activated catalyst) and CSA being fed to a continuous reactor containing ethylene and excess propylene, which are polymerized to form a rubber.
- the continuous reactor can feed into a tube where either the ethylene is removed or consumed, and crystalline polypropylene is formed.
- This propylene polymerization proceeds to form a triblock comprised of rubber midblock, capped at each end with a crystalline polypropylene endblock.
- the process also can be run in multiple batch reactors to form multiblocks. For example, running the process in two reactors would be expected to lead to a symmetric triblock.
- the process also can be run in a single reactor where reactor environment can be changed during or throughout the polymerization, allowing the formation of different types of olefin polymers.
- the processes, methods, and CSAs disclosed herein can be extended to a variety of monomers to yield multiblock copolymers encompassing a broad distribution of polymer composition properties.
- Molecular weights are determined by optical analysis techniques including deconvoluted gel permeation chromatography coupled with a low angle laser light scattering detector (GPC- LALLS) as described by Rudin, A., "Modern Methods of Polymer Characterization", John Wiley & Sons, New York (1991) pp. 103-112.
- Branching distributions are determined by crystallization analysis fractionation (CRYSTAF) using a CRYSTAF 200 unit commercially available from PolymerChar, Valencia, Spain.
- the samples are dissolved in 1 ,2,4 trichlorobenzene at 160 0 C (0.66 mg/mL) for 1 hr and stabilized at 95 0 C for 45 minutes.
- the sampling temperatures range from 95 to 30 0 C at a cooling rate of 0.2 °C/min.
- An infrared detector is used to measure the polymer solution concentrations.
- the cumulative soluble concentration is measured as the polymer crystallizes while the temperature is decreased.
- the analytical derivative of the cumulative profile reflects the short chain branching distribution of the polymer.
- the CRYSTAF peak temperature and area are identified by the peak analysis module included in the CRYSTAF Software (Version 2001. b, PolymerChar, Valencia, Spain).
- the CRYSTAF peak finding routine identifies a peak temperature as a maximum in the dW/dT and the area between the largest positive inflections on either side of the identified peak in the derivative curve.
- the DSC melting peak is measured as the maximum in heat flow rate
- the gel permeation chromatographic system consists of either a Polymer
- Calibration of the GPC column set is performed with 21 narrow molecular weight distribution polystyrene standards with molecular weights ranging from 580 to 8,400,000, arranged in 6 "cocktail" mixtures with at least a decade of separation between individual molecular weights.
- the standards are purchased from Polymer Laboratories (Shropshire, UK).
- the polystyrene standards are prepared at 0.025 grams in 50 milliliters of solvent for molecular weights equal to or greater than 1,000,000 and 0.05 grams in 50 milliliters of solvent for molecular weights less than 1 ,000,000.
- the polystyrene standards are dissolved at 80 0 C with gentle agitation for 30 minutes.
- the narrow standards mixtures are run first and in order of decreasing highest molecular weight component to minimize degradation.
- the polystyrene standard peak molecular weights are converted to polyethylene molecular weights using the following equation (as described in Williams and Ward, J. Polym. ScL, Polym. Let., 6, 621 (1968)):
- Samples are compression molded using ASTM D 1928. Flexural and 2 percent secant moduli are measured according to ASTM D-790.
- DMA Dynamic Mechanical Analysis
- a 1.5 mm plaque is pressed and cut in a bar of dimensions 32 mm X 12 mm.
- the sample is clamped at both ends between fixtures separated by 10 mm (grip separation ⁇ L) and subjected to successive temperature steps from -100 0 C to +200 0 C (5 0 C per step).
- the torsion modulus G' is measured at an angular frequency of 10 rad/s, the strain amplitude being maintained between 0.1 percent and 4 percent to ensure that the torque is sufficient and that the measurement remains in the linear regime.
- MFR Melt Flow Rate
- MI Melt index
- Analytical temperature rising elution fractionation (ATREF) analysis is conducted according to the method described in U.S. Patent No. 4,798,081, the relevant portion of which is incorporated herein by reference.
- the composition to be analyzed is dissolved in trichlorobenzene and allowed to crystallize in a column containing an inert support (stainless steel shot) by slowly reducing the temperature to 20 0 C at a cooling rate of 0.1 °C/min.
- the column is equipped with an infrared detector.
- An ATREF chromatogram curve is then generated by eluting the crystallized polymer sample from the column by slowly increasing the temperature of the eluting solvent (trichlorobenzene) from 20 0 C to 120 0 C at a rate of 1.5 °C/min.
- eluting solvent trichlorobenzene
- Applicants reserve the right to proviso out or exclude any individual members of such a group, including any sub-ranges or combinations of sub-ranges within the group, that can be claimed according to a range or in any similar manner, if for any reason Applicants choose to claim less than the full measure of the disclosure, for example, to account for a reference that Applicants are unaware of at the time of the filing of the application.
- MMAO refers to modified methylalumoxane, a triisobutylaluminum modified methylalumoxane available commercially from AkzoNobel Corporation.
- Catalyst (Al) is [N-(2,6-di(l-methylethyl)phenyl)amido)(2- isopropylphenyl)( ⁇ -naphthalen-2-diyl(6-pyridin-2-diyl)methane)]hafnium dimethyl, prepared according to the teachings of WO 03/40195, 2003US0204017, USSN 10/429,024, filed May 2, 2003, and WO 04/24740.
- Catalyst (A2) is [N-(2,6-di( 1 -methylethyl)phenyl)amido)(2- methylphenyl)( 1 ,2-phenylene-(6-pyridin-2-diyl)methane)]hafnium dimethyl, prepared according to the teachings of WO 03/40195, 2003US0204017, USSN 10/429,024, filed May 2, 2003, and WO 04/24740.
- Catalyst (A3) is bis[N,N' "-(2,4,6-tri(methylphenyl)amido)- ethylenediaminejhafnium dibenzyl.
- Catalyst (A4) is bis((2-oxoyl-3-(dibenzo-lH-pyrrole-l-yl)-5-
- Catalyst (A5) is (Ws-(I -methylethyl)(2-oxoyl-3 ,5 -di(t- butyl)phenyl)immino)zirconium dibenzyl.
- Catalyst (A6) is bis-(l-(2-methylcyclohexyl)ethyl)(2-oxoyl-3,5-di(t- butyl)phenyl)immino) zirconium dibenzyl.
- Catalyst (A7) is (t-butylamido)dimethyl(3-N-pyrrolyl-l,2,3,3a,7a- ⁇ - inden-l-yl)silanetitanium dimethyl prepared substantially according to the techniques of USP 6,268,444.
- Catalyst (A8) is (t-butylamido)di(4-methylphenyl)(2-methyl- l,2,3,3a,7a- ⁇ -inden-l-yl)silanetitanium dimethyl prepared substantially according to the teachings of US-A-2003/004286.
- Catalyst (A9) is (t-butylamido)di(4-methylphenyl)(2-methyl- l,2,3,3a,8a- ⁇ -s-indacen-l-yl)silanetitanium dimethyl prepared substantially according to the teachings of US-A-2003/004286.
- Catalyst (AlO) is bis(dimethyldisiloxane)(indene-l-yl)zirconium dichloride available from Sigma-Aldrich.
- Cocatalyst 1 A mixture of methyldi(Ci 4 -i 8 alkyl)ammonium salts of tetrakis(pentafluorophenyl)borate (also termed armeenium borate), prepared by reaction of a long chain trialkylamine (ArmeenTM M2HT, available from Akzo-Nobel, Inc.), HCl and Li[B(C 6 F 5 ) 4 ], substantially as disclosed in US Patent No. 5,919,9883, Ex. 2.
- NMR spectra are taken of the crude material, which demonstrates complete consumption of the olefin. Excess diethylborane is removed in vacuo to leave behind a colorless oil. The mixture is cooled to -40 0 C in a freezer. The mixture then is removed and diethyl zinc (5.8 g, 47 mmol) that has been pre-cooled to -40 0 C is added drop wise to the mixture. A significant amount of white solid is observed to form in the jar as diethyl zinc is added. The mixture is stirred overnight at room temperature, after which time grey solid is observed in the reaction mixture. Toluene (about 30 mL) is added and the mixture is stirred while heating at 55 0 C to dissolve the product.
- the mixture is decanted and the solution filtered through a 0.45 micron frit.
- the solution is placed in a freezer at -40 °C.
- the white solid is isolated and dried under vacuum.
- the solid is re-dissolved in 20 mL toluene at 60 °C and the solvent removed in vacuo at 35 °C to remove excess diethylzinc. After drying under vacuum for 2 hours at 40 °C, the mass of the product is 1.3 g.
- the molar ratio of Zn:B is preferably greater than 1, to reduce or minimize any excess Et 2 B(CH 2 ) J1 BEt 2 present in the mixture.
- the value of N is controlled either by placing the dual headed chain shuttling agent under vacuum to remove ZnR ! 2 (to increase N) or by adding more ZnR ! 2 to the dual headed chain shuttling agent (to decrease N).
- R 1 [M A -R 2 -] N -M A R 1 and R 1 DVlV -R 2 -] N M B (R 1 ) 2 are characterized by having values of N>1.
- the rapid room temperature exchange of zinc - hydrocarbyl groups between and among dihydrocarbyl zinc molecules is used to adjust the value or range of values of N in the chain shuttling agents.
- This rapid and reversible equilibrium aspect allows the value of N to be lowered by combining a known amount of ZnR ! 2 such as a dialkyl zinc, with a known amount of the dual-headed CSA.
- the value of N can be increased by dissolving the dual headed zinc chain shuttling agent in a solvent such as toluene and placing the solution under vacuum.
- a solvent such as toluene
- the more volatile ZnR 1 2 for example ZnEt 2
- ZnEt 2 is removed by vacuum, driving the equilibrium away from lower values of N toward higher N values.
- the ratio of R 2 to R 1 moieties can be measured by 1 H NMR and 13 C ⁇ 1 H ⁇ NMR spectroscopy and used to determine the average value or range of values of N for the dual-headed CSAs such as Et[ZnCH 2 CH 2 ] N ZnEt prepared in this manner.
- DH CSAs dual-headed chain shuttling agents having the general formulas R 1 [Zn-R 2 -] N ZnR 1 , R 1 PVIg- R 2 -] N MgR ⁇ R 1 [BR 1 -R 2 -] N BR 1 2 , R 1 [A1R 1 -R 2 -] N A1R 1 2 , and R 1 [GaR 1 -R 2 -] N GaR 1 2 , are prepared using methods analogous to that described in Example 1 , and are expected to provide similar polymer and polymerization results to those described in Table 3.
- R 1 in each occurrence is a monovalent hydrocarbyl moiety
- R 2 in each occurrence is independently a hydrocarbadiyl having from 2 to 20 carbon atoms, inclusive;
- N in each occurrence is an integer from 2 to 50, inclusive.
- examples of chain shuttling agents encompassed by this disclosure include those with N>1.
- the following structure illustrates the difference between a dual-headed CSA site (D) which constitutes each alkandiyl zinc bond and a mono-headed CSA site (M) which constitutes each alkyl zinc bond.
- Q the ratio of multi-headed sites to mono-headed sites
- Q the ratio of dual-headed CSA sites to mono-headed CSA sites
- the value of Q is equal to N, and also equal to the number of zinc atoms in the CSA minus 1.
- Table 5 illustrates this concept for some dual-headed chain shuttling agents of the formula R 1 -[Zn-R 2 -] N Zn-R 1 .
- Mw is the weight average kinetic chain molecular weight.
- Aluminum chain shuttling agents of the form Al[(CH 2 ) m ] 3 Al generally can be prepared by the following method, as illustrated for the synthesis of
- Schemes 5 and 6 illustrate synthetic methods by which cyclic dual-headed chain shuttling agents of the form M A [R 2 ] 2 M A could be used to prepare acyclic CSAs of the general formula R 1 [M A -R 2 -] N M A R 1 .
- the specific examples are applicable to the compunds of the form M A [(CH 2 ) m ] 2 M A where M A is Zn or Mg, and are illustrated for zinc.
- the I[Zn(CH 2 ) 8 ]ZnI product of Scheme 7 can be utilized in the same manner as EtZn(CH 2 ) 8 ZnEt in Scheme 6 is used, that is, to vary the value of N and generate new CSAs. If desired, the I[Zn(CH 2 ) 8 ]ZnI product can be used in a metathesis reaction such as an alkylation or alkoxylation, to form any number of species of the type R ⁇ [Zn(CH 2 ) S ]ZnR 1 , where R 1 can be a hydrocarbyl, hydrocarbyl oxide,
- hydrocarbylamide tri(hydrocarbyl)silyl, and the like.
- Scheme 9 illustrates one method by which larger dendritic chain shuttling agents could be built up by alternating the reaction sequence of Scheme 8. This scheme is not intended to be limiting, as the use of other reagents such as F can be envisioned to build up the size and complexity of the CSA dendrimer by a somewhat different processs.
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Abstract
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Priority Applications (10)
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EP18212194.7A EP3489264B1 (en) | 2009-07-29 | 2010-07-20 | Chain shuttling agents and their use for the preparation of block copolymers |
KR1020127002417A KR101688253B1 (en) | 2009-07-29 | 2010-07-20 | Dual- or multi-headed chain shuttling agents and their use for the preparation of block copolymers |
JP2012522894A JP5726873B2 (en) | 2009-07-29 | 2010-07-20 | Two-headed or multi-headed chain shuttling agents and their use for the preparation of block copolymers |
US13/377,451 US8501885B2 (en) | 2009-07-29 | 2010-07-20 | Dual- or multi-headed chain shuttling agents and their use for preparation of block copolymers |
EP17164138.4A EP3243846B1 (en) | 2009-07-29 | 2010-07-20 | Multi-headed chain shuttling agents and their use for the preparation of block copolymers |
ES10737196.5T ES2651292T3 (en) | 2009-07-29 | 2010-07-20 | Double or multiple head chain transfer agents and their use for the preparation of block copolymers |
BR112012001948-1A BR112012001948B1 (en) | 2009-07-29 | 2010-07-20 | Chain transfer agent, process for polymerizing at least one addition polymerizable monomer, multi-block copolymer and catalyst composition |
CN201080033597XA CN102498133B (en) | 2009-07-29 | 2010-07-20 | Dual- or multi-headed chain shuttling agents and their use for preparation of block copolymers |
EP10737196.5A EP2459598B1 (en) | 2009-07-29 | 2010-07-20 | Dual- or multi-headed chain shuttling agents and their use for the preparation of block copolymers |
SG2012005534A SG178111A1 (en) | 2009-07-29 | 2010-07-20 | Dual- or multi-headed chain shuttling agents and their use for the preparation of block copolymers |
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KR (1) | KR101688253B1 (en) |
CN (1) | CN102498133B (en) |
BR (1) | BR112012001948B1 (en) |
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BR112012001948A2 (en) | 2016-03-15 |
EP3243846A3 (en) | 2018-01-24 |
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ES2894689T3 (en) | 2022-02-15 |
JP2015157951A (en) | 2015-09-03 |
JP6023249B2 (en) | 2016-11-09 |
EP3489264A1 (en) | 2019-05-29 |
EP2459598A2 (en) | 2012-06-06 |
JP2017039946A (en) | 2017-02-23 |
JP5726873B2 (en) | 2015-06-03 |
ES2651292T3 (en) | 2018-01-25 |
WO2011016991A3 (en) | 2011-06-16 |
US8501885B2 (en) | 2013-08-06 |
BR112012001948B1 (en) | 2019-08-20 |
JP2013500384A (en) | 2013-01-07 |
CN102498133A (en) | 2012-06-13 |
EP3489264B1 (en) | 2021-08-25 |
SG178111A1 (en) | 2012-03-29 |
EP3243846A2 (en) | 2017-11-15 |
CN102498133B (en) | 2013-10-30 |
KR20120044996A (en) | 2012-05-08 |
US20120165486A1 (en) | 2012-06-28 |
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