| Patent Number |
Title Of Patent |
Date Issued |
| 6777508 |
Catalysts for the polymerization of olefins |
August 17, 2004 |
| Disclosed are catalysts for the polymerization of alpha-olefins which comprise the reaction product of: (a) an Al-alkyl compound; (b) a silicon compound containing at least one Si--OR or Si--OCOR or Si--NR.sub.2 bond, R being a hydrocarbyl radical; (c) a solid comprising, as essenti |
| 6515085 |
Components and catalysts for the polymerization of olefins |
February 4, 2003 |
| Catalyst-forming components and catalysts for the polymerization of olefins based on said components are disclosed. The catalysts comprise the reaction product of: (a) an Al alkyl compound; (b) a silicon compound containing at least a Si--OR or Si--OCOR or Si--NR.sub.2 bond, R bein |
| 6194342 |
Components and catalysts for the polymerization of olefins |
February 27, 2001 |
| The present invention relates to supported catalysts for the polymerization of alpha-olefins which comprise the reaction product of:(a) an Al-alkyl compound;(b) a silicon compound containing at least one Si--OR or Si--OCOR or Si--NR.sub.2 bond, R being a hydrocarbyl radical;(c) a solid compr |
| 5618771 |
Components and catalysts for the polymerization of olefins |
April 8, 1997 |
| Disclosed are catalysts for the polymerization of alpha-olefins which comprise the reaction product of:(a) an Al alkyl compound;(b) a silicon compound containing at least a Si--OR or Si--OCOR or Si--NR.sub.2 bond, R being a hydrocarbyl radical;(c) a solid comprising, as essential support, a |
| 5539067 |
Components and catalysts for the polymerization of olefins |
July 23, 1996 |
| Disclosed are catalysts for the polymerization of alpha-olefins which comprise the reaction product of:(a) an Al alkyl compound;(b) a silicon compound containing at least a Si--OR or Si--OCOR or Si--NR.sub.2 bond, R being a hydrocarbyl radical;(c) a solid comprising, as essential support, a |
| 5508245 |
Spherical components and catalysts for the polymerization of olefins |
April 16, 1996 |
| Spherical components of catalysts for the polymerization of olefins comprising:(a) a vanadium compound selected from the compounds of formula VOX.sub.2 Y or VX.sub.n Y.sub.n-4n, where X is Cl or Br and Y is Cl, Br OR or NR.sup.I.sub.2(b) MgCl.sub.2 in spherical form.Said components have |
| 5468704 |
Components and catalysts for the polymerization of olefins |
November 21, 1995 |
| Disclosed is a catalyst for the polymerization of olefins, which includes the product of the reaction between an Al-alkyl compound and a solid catalyst component containing a magnesium halide in active form, a titanium compound and an electron-donor selected from the 1,3-diketones of |
| 5369186 |
Alpha olefins functionalized polymers |
November 29, 1994 |
| Disclosed are polymers and copolymers of CH.sub.2 .dbd.CHR alpha olefins where R is hydrogen or a 1-6 carbon atom alkyl radical, containing in the chain from 0.1 to 40 mole % of monomeric units ##STR1## where X is selected from the group consisting of (CH.sub.2).sub.r CH.sub.2 CH |
| 5142005 |
Process for producing crystalline vinyl aromatic polymers having mainly a syndiotactic structure |
August 25, 1992 |
| A process for the production of primarily syndiotactic vinyl aromatic polymers by polymerizing or copolymerizing vinyl aromatic monomers such as styrene or styrene derivatives in the presence of a catalyst system comprising the product of the reaction between:a) a compound of a transitio |
| 5126303 |
Catalysts for the polymerization of olefins |
June 30, 1992 |
| Catalysts for the polymerization of olefins, comprising the product of the reaction between:A) a cyclopentadienyl compound of Ti, Zr or Hf;B) an alumoxane compound of formula: ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, the same or different from each other, are alkyl, alk |
| 5122492 |
Components and catalysts for the polymerization of olefins |
June 16, 1992 |
| Catalyst components for the polymerization of olefins and catalysts obtained therefrom, said components comprising a porous metal oxide on which a magnesium dihalide, and a titanium halide or titanium halogen alcoholate and a compound containing two or more ether groups having specif |
| 5106807 |
Components and catalysts for the polymerization of olefins |
April 21, 1992 |
| Disclosed are solid catalyst components for the polymerization of olefins comprising a titanium halide or titanium alkoxy halide, and an electron-donor compound selected from silicon compounds of the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrocarbyl radical |
| 5068213 |
Components and catalysts for the polymerization of olefins |
November 26, 1991 |
| Catalyst components for the polymerization of olefins comprising a titanium halide or alkoxyhalide and an electron-donor compound selected from ethers having two or more ether groups and containing at least one heteroatom selected from the group consisting of N, S, P, Si, non-ether O and |
| 5049535 |
Catalysts for the polymerization of olefins |
September 17, 1991 |
| Catalysts for the polymerization of olefins, obtained from special zirconocenic compounds and from alkyl-Al compounds. |
| 5021514 |
Imidized acrylic polymers and process for their preparation |
June 4, 1991 |
| Imidized acrylic polymers obtained by means of the reaction of an acrylic resin in the molten state, with at least one modifying agent having the general formula:wherein:R and R' are either equal to, or different from, each other and represent hydrogen or an alkyl, cycloalkyl, aryl or al |
| 5017678 |
Thermotropic liquid crystalline polymers |
May 21, 1991 |
| Melt-formable thermotropic liquid crystalline polymers containing groups derived from terephthalic acid and a mixture of phenyl hydroquinone, 2-(.alpha.-phenylisopropyl) hydroquinone and, if desired, 2,5 bis (.alpha.-phenylisopropyl) hydroquinone. |
| 4980329 |
Catalyst component and catalyst for the polymerization of alpha-olefins to stereoregular polymer |
December 25, 1990 |
| Disclosed is a component for a catalyst for the polymerization of alpha-olefins to stereoregular polymers having narrow molecular weight distribution. The product is formed by the reaction of a solid catalyst-forming component comprising (1) a Ti compound having at least one Ti-halog |
| 4978648 |
Catalysts for the polymerization of olefins |
December 18, 1990 |
| Catalysts for the polymerization of olefins, particularly alpha-olefin of the formula CH.sub.2 .dbd.CHR in which R is an alkyl radical with 1-6 carbon atoms or an aryl radical, obtained by the reaction of:(a) an Al-alkyl compound;(b) an ether containing at least two ether groups which can fo |
| 4971937 |
Components and catalysts for the polymerization of olefins |
November 20, 1990 |
| Solid catalyst components for the polymerization of olefins and modified with electron-donor compounds, comprising a titanium halide supported on a magnesium dihalide in active form and containing as an electron-donor compound a di- or other polyether having specific reactivity chara |
| 4968755 |
Imidized acrylic polymers and process for their preparation |
November 6, 1990 |
| Imidized acrylic polymers obtained by means of the reaction of an acrylic resin in the molten state, with at least one modifying agent having the general formula:wherein:R and R' are either equal to, or different from, each other and represent hydrogen or an alkyl, cycloalkyl; aryl or al |
| 4933395 |
Process for imidizing vinyl-aromatic copolymers |
June 12, 1990 |
| Process for the imidization of vinyl-aromatic copolymers containing maleic anhydride, using as an imidizing agent an amide, the imidization being conducted in an anhydrous state and in the presence of a catalyst. |
| 4889896 |
Process for the imidization of copolymers of maleic anhydride with vinyl-aromatic monomers |
December 26, 1989 |
| The invention concerns a process for the imidization of copolymers of maleic anhydride with vinyl-aromatic monomers using an urea as the imidizing agent. |
| 4713416 |
Thermoplastic compositions including polyphenylenether, having improved impact strength and proc |
December 15, 1987 |
| Thermoplastic compositions based on polyphenylenether resins, endowed with improved mechanical, thermal and solvent-resistance characteristics, comprising, for 100 parts by weight of polyphenylenether resin:(a) from 0 to 90 parts by weight of a thermoplastic polymer other than polystyren |
| 4614727 |
Polymerization catalyst |
September 30, 1986 |
| Polymerization catalysts, more particularly catalysts for the polymerization of ethylene and mixtures thereof with other monomers copolymerizable therewith, are disclosed. The catalysts are prepared by mixing (A) an organometallic compound or hydride of a metal belonging to Groups I, |
| 4613655 |
Catalysts for the polymerization of olefins |
September 23, 1986 |
| New catalysts for the polymerization of olefins and more particularly of ethylene and mixtures thereof with higher alpha-olefins and/or diolefins, are disclosed. The catalysts are prepared by mixing (a) a hydride or an organo-metallic compound of a metal belonging to Groups I, II or III |
| 4542198 |
Polymerization catalysts |
September 17, 1985 |
| Highly active catalysts for the polymerization of olefins are disclosed. The catalysts are prepared by mixing a hydride or organometallic compound of a metal belonging to Groups I, II or III of the Mendelyeev Periodic Table with the product obtained by contacting an oxygenated Ti compoun |
| 4542197 |
Polymerization catalyst |
September 17, 1985 |
| Polymerization catalysts, particularly catalysts for the polymerization of olefins, are disclosed. The catalysts are prepared by mixing hydrides of organometallic compounds of metals belonging to Groups I to III of the Mendelyeev Periodic Table with products obtained by contacting (1) |
| 4336360 |
Process for the stereoregular polymerization of alpha-olefins |
June 22, 1982 |
| There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at |
| 4314911 |
Polymerization catalyst |
February 9, 1982 |
| New, highly active catalysts for the polymerization of ethylene and mixtures of ethylene with higher alpha-olefins and/or diolefins, are disclosed. The catalysts are prepared by mixing (a) hydrides or organometallic compounds of metals belonging to Groups I, II or III of the Mendelye |
| 4277589 |
Components of catalysts useful for the polymerization of alpha-olefins, and catalysts prepared t |
July 7, 1981 |
| There are disclosed new solid catalyst-forming components for use in preparing catalysts for the stereoregular polymerization of alpha-olefins containing at least 3 carbon atoms, mixtures of alpha-olefins with one another and/or with ethylene, said components being obtained by reacting(a |
| 4265785 |
Polymerization catalyst |
May 5, 1981 |
| New, highly active catalysts for the polymerization of ethylene and mixtures of ethylene with higher alpha-olefins and/or diolefins, are disclosed. The catalysts are prepared by mixing (a) hydrides or organometallic compounds of metals belonging to Groups I, II or III of the Mendelyc |
| 4250104 |
Catalyst-forming components for preparing catalysts useful in the polymerization of olefins |
February 10, 1981 |
| There are disclosed new starting components for use in preparing catalysts for the polymerization and copolymerization of olefins. The new starting components are compounds having the general formulae R.sub.2 AlOR" and/or RAl(OR").sub.2, in which R represents alkyl radicals containing 1 |
| 4226963 |
Process for the stereoregular polymerization of alpha-olephins |
October 7, 1980 |
| There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at lea |
| 4187196 |
Process for the stereoregular polymerization of alpha-olefins |
February 5, 1980 |
| There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at |
| 4174429 |
Process for polymerizing olefins |
November 13, 1979 |
| New catalysts for the polymerization and copolymerization of olefins are disclosed. The catalysts are prepared from (1) a new class of metal compounds containing at least one atom of Mg, Mn or Ca and at least one atom of Ti, V or Zr and (2) organometallic compounds of metals belonging |
| 4174299 |
Catalysts for the polymerization of olefins |
November 13, 1979 |
| New catalysts for the polymerization and copolymerization of olefins are described. The catalysts are prepared from new components which are complexes of the metals Mg, Mn and/or Ca with the transition metals Ti, V and/or Zr, plus an electron-donor compound. |
| 4156063 |
Process for the stereoregular polymerization of alpha olefins |
May 22, 1979 |
| There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at le |
| 4149990 |
Components of catalysts useful for the polymerization of .alpha.-olefins, and catalysts prepared |
April 17, 1979 |
| There are disclosed new solid catalyst-forming components for use in preparing catalysts for the stereoregular polymerization of alpha-olefins containing at least 3 carbon atoms, mixtures of alpha-olefins with one another and/or with ethylene, said components being obtained by reacting(a |
| 4124532 |
Catalysts for polymerizing olefins |
November 7, 1978 |
| New catalysts for the polymerization and copolymerization of olefins are disclosed. The catalysts are prepared from (1) a new class of metal complexes of general formula M.sub.m M'X.sub.2m Y.nE, in which M is Mg, Mn and/or Ca; m is a number from 0.5 to 2.0; M' is Ti, V and/or Zr; X is Cl |
| 4107416 |
Components of catalysts for use in polymerizing and catalysts prepared therefrom |
August 15, 1978 |
| There are disclosed new starting components for use in preparing catalysts for the polymerization and copolymerization of olefins. The new starting components are compounds having the general formulae R.sub.2 AlOR" and/or RAl (OR").sub.2, in which R represents alkyl radicals containing 1 |
| 4107415 |
Process for the stereospecific polymerization of alpha-olefins |
August 15, 1978 |
| Alpha-olefins C.sub.3 -C.sub.6 are polymerized stereospecifically with the aid of catalysts obtained by mixing(a) a catalyst-forming component which is an addition and/or substitution product of an electron-donor compound (or a Lewis base) with an aluminum trialkyl, or an addition produc |
| 4107414 |
Process for the stereoregular polymerization of alpha olefins |
August 15, 1978 |
| There is disclosed a process for the stereoregular polymerization of alpha-olefins or mixtures thereof with ethylene, conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at |
| 4107413 |
Process for the stereoregular polymerization of alpha olefins |
August 15, 1978 |
| There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene conducted in the presence of highly active and stereospecific new catalysts.The catalysts are obtained from the reaction of a component (A) which is a particular Al-alkyl |
