| Patent Number |
Title Of Patent |
Date Issued |
| 7371806 |
Process for the preparation of ethylene copolymers |
May 13, 2008 |
| Process for the preparation of ethylene copolymers comprising the copolymerization of ethylene with olefins CH.sub.2.dbd.CHR, in which R is a hydrocarbyl radical with 1-12 carbon atoms carried out in the presence of a catalyst comprising (i) a solid catalyst component comprising Mg, |
| 7208436 |
Catalyst components for the polymerization of olefins |
April 24, 2007 |
| Catalyst components for the polymerization of olefins CH.sub.2.dbd.CHR, wherein R is hydrogen or a hydrocarbon radical having 1 12 carbon atoms, comprising Mg, Ti, Cl, OR groups, where R is a C1 C10 alkyl group optionally containing heteroatoms, and an ether having two or more ether |
| 7202315 |
Process for the preparation of ethylene polymers |
April 10, 2007 |
| A process for polymerizing ethylene comprising contacting under polymerization condition ethylene and optionally one or more olefins with a catalyst system obtainable by contacting: a bis amido compound of formula (I) wherein Y is Si, Ge and Sn; X is hydrogen, halogen or an hydrocarb |
| 7098164 |
Process for the polymerization of olefins |
August 29, 2006 |
| A process for the (co) polymerization of olefins of formula CH.sub.2.dbd.CHR wherein R is a hydrogen atom, a methyl or an ethyl radical, carried out in the presence of a system comprising (a) solid catalyst component comprising a compound of Ti or V not containing Metal-.pi. bonds, M |
| 7094847 |
Metallocene compounds and use thereof in catalysts for the polymerization of olefins |
August 22, 2006 |
| A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8 carbon atoms.These metallocenes are useful as catalyst components for the polymerization |
| 6864333 |
Process for the preparation of ethylene polymers |
March 8, 2005 |
| Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising single carbon bridged metallocenes, which has a particular ligand system co |
| 6822106 |
Preparation of ethylene polymers |
November 23, 2004 |
| Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising silicon bridged metallocenes having a particular ligand system containing a |
| 6787619 |
Process for the preparation of ethylene polymers |
September 7, 2004 |
| Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising silicon bridged metallocenes having a particular ligand system containing a |
| 6774194 |
Supported catalysts for the polymerization of olefins |
August 10, 2004 |
| Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an organo-metallic compound of aluminium containing heteroatoms selected from oxygen, nitrogen and sulp |
| 6716940 |
Catalyst for the polymerization of olefins |
April 6, 2004 |
| Catalyst system for the polymerization of olefins CH.sub.2.dbd.CHR, wherein R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, comprising the product of the reaction between (a) a solid catalyst component comprising Mg, Ti, and halogen, (b) dimethylaluminium chloride (D |
| 6673880 |
Bridged zirconocene compounds, process for their preparation and their use as catalyst component |
January 6, 2004 |
| Zirconocene compounds with two indenyl ligands linked in the 2 position by means of a two-carbon-atoms divalent bridging group can be suitably used as components of catalysts for the polymerization of olefins. Particularly it is possible to prepare, with high yields, ethylene (co)polymer |
| 6664351 |
Ethylene copolymers, process for the preparation of ethylene-based polymers and catalyst system |
December 16, 2003 |
| Ethylene copolymers are prepared with comonomers selected from: (a) .alpha.-olefins, (b) cycloolefins and (c) polyenes,with a content of ethylene units of between 80 and 99 mol %, a content of units derived from .alpha.-olefin, cycloolefin and/or polyene comonomers of between 1 and |
| 6521724 |
Polymerization process |
February 18, 2003 |
| Processes for the polymerization of olefins in which late transition metal complexes, such as nickel, iron, cobalt and palladium complexes, are used as a polymerization catalyst have improved polymer productivity when oxidizing agents are present during at least a portion of the poly |
| 6479609 |
Multi-stage process for the polymerization of olefins |
November 12, 2002 |
| A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in |
| 6476163 |
Catalysts for the polymerization of olefins and process for the preparation thereof |
November 5, 2002 |
| Catalysts for the polymerization of olefins are disclosed, comprising the product obtainable by contacting: (A) a bridged and/or substituted cyclopentadienyl compound of Ti, Zr or Hf; (B) one or more organometallic aluminium compounds of formula (II): AlR.sup.4.sub.3-z H.sub.z wherein th |
| 6448350 |
Process for the preparation of copolymers of ethylene with alpha-olefins |
September 10, 2002 |
| Ethylene based copolymers having high molecular weights, narrow molecular weight distributions, and a very good homogeneous distribution of the comonomer units can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the pr |
| 6444604 |
Supported catalysts for the polymerization of olefins |
September 3, 2002 |
| Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an organo-metallic compound of aluminium containing heteroatoms selected from oxygen, nitrogen and sulp |
| 6433203 |
Bridged metallocenes, preparation, use in catalytic systems |
August 13, 2002 |
| Metallocene compounds having the general formula (I): ##STR1## R.sup.1 are hydrocarbon groups, R.sup.2 are hydrogen or hydrocarbon groups; M is a transition metal of group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table; M' is a transition metal selected |
| 6423660 |
Supported catalysts for the polymerization of olefins |
July 23, 2002 |
| Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an organo-metallic compound of aluminium containing heteroatoms selected from oxygen, nitrogen and sulp |
| 6395668 |
Catalyst system for olefin polymerization |
May 28, 2002 |
| It is disclosed a new catalyst system for the polymerization of olefins comprising the product obtainable by contacting the following components: (A) one or more compounds of a late transition metal belonging to Group 8-11 of the Periodic Table; and (B) the reaction product of water with |
| 6306791 |
Bridged zirconocene compounds, process for their preparation and their use as catalyst component |
October 23, 2001 |
| Zirconocene compounds with two indenyl ligands linked in the 2 position by means of a two-carbon-atoms divalent bridging group can be suitably used as components of catalysts for the polymerization of olefins. Particularly it is possible to prepare, with high yields, ethylene (co)polymer |
| 6262195 |
Multi-stage process for the polymerization of olefins |
July 17, 2001 |
| A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising:(A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared;(B) a treatment stage in which th |
| 6232484 |
Bridged zirconocene compounds, process for their preparation and their use as catalyst component |
May 15, 2001 |
| Zirconocene compounds with two indenyl ligands linked in the 2 position by means of a two-carbon-atoms divalent bridging group can be suitably used as components of catalysts for the polymerization of olefins. Particularly it is possible to prepare, with high yields, ethylene (co)polymer |
| 6211108 |
Metallocene compounds and use thereof in catalysts for the polymerization of olefins |
April 3, 2001 |
| A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8 carbon atoms. These metallocenes are useful as catalyst components for the polymerization of |
| 6136936 |
Ethylene copolymers, process for the preparation of ethylene-based polymers and catalyst system |
October 24, 2000 |
| Ethylene copolymers are prepared with comonomers selected from:(a) .alpha.-olefins,(b) cycloolefins and(c) polyenes,with a content of ethylene units of between 80 and 99 mol %, a content of units derived from .alpha.-olefin, cycloolefin and/or polyene comonomers of between 1 and 20 mol %, ch |
| 6136932 |
Catalysts and processes for the polymerization of olefins |
October 24, 2000 |
| Catalysts for the polymerization of olefins which comprise the reaction product of (a) a bridged and/or substituted cyclopentadienyl compound of titanium, zirconium, or hafnium; (b) an organometallic aluminum compound of formula Al(CH.sub.2 --CR.sup.4 R.sup.5 R.sup.6).sub.w R.sup.7.sub.y |
| 6034196 |
Super random copolymers of ethylene with olefinic monomers |
March 7, 2000 |
| Copolymers of ethylene with comonomers selected from (a) alpha-olefins, (b) cycloolefins and/or (c) dienes, characterized by the fact that:the molar percentage of the comonomer (% .alpha.) and the density of the copolymer (D) satisfy the relation % .alpha.+150D.ltoreq.141. |
| 6028140 |
Process for the (co)polymerization of olefins |
February 22, 2000 |
| Homopolymers or copolymers obtained by a multistage process of olefins having the formula CH.sub.2 .dbd.CHR, in which R is hydrogen or R has from 1 to 10 carbon atoms and is an alkyl, cycloalkyl or aryl group, the process comprising:(A) a first stage of polymerization in which one or mor |
| 5922632 |
Vanadium based components and catalysts for the polymerization of olefins and polymerization pro |
July 13, 1999 |
| Catalysts component of the (co)polymerization of alpha-olefins CH.sub.2 .dbd.CHR, wherein R is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, comprising a product of the composition:wherein (b) represents an organic compound selected from alkyl, aryl and acyl halides, y is |
| 5849653 |
Catalysts and processes for the polymerization of olefins |
December 15, 1998 |
| Catalysts for the polymerization of olefins are disclosed, which comprise the reaction product of:(A) a bridged and/or substituted cyclopentadienyl compound of titanium, zirconium or hafnium;(B) an organometallic aluminum compound of the formula (II): wherein in the (CH.sub.2 --CR.sup.4 R.su |
| 5648422 |
Process for the (co)polymerization of olefins |
July 15, 1997 |
| Multistage process for the polymerization of one or more olefins of the formula CH.sub.2 .dbd.CHR, in which R is hydrogen or an alkyl, cycloalkyl or aryl group having from 1 to 10 carbon atoms, comprising:(A) a first stage of polymerization, in which a first olefin polymer is prepared in |
| 5532326 |
Process for preparing elastomeric ethylene copolymers |
July 2, 1996 |
| Process for preparing elastomeric copolymers of ethylene with .alpha.-olefins CH.sub.2 .dbd.CHR, optionally containing minor proportions of a diene, characterized by the use during the polymerization of a catalyst comprising the reaction product of:(I) a solid component comprising VCl.su |
