Montedison S.p.a.

Himont Incorporated

Montecatini Edison S.p.a.

Montell Technology Company Bv

Mitsui Petrochemical Industries, Ltd.

Montell North America Inc.

Basell Poliolefine Italia, S.p.a.

Montedipe S.p.a.

Vedril S.p.a.

Hinmont Incorporated

Montecanti Edison, S.p.a.

Umberto Giannini

Enrico Albizzati

Paolo Longi

Sandro Parodi

Romano Mazzocchi

Giampiero Morini

Antonio Cassata

Roberto Nocci

Raimondo Scordamaglia

Luisa Barino

Domenico Deluca

Luciano Noristi

Pier C Barbe

Luciano Canova

Luigi Resconi

Franco Pirinoli

Antonio Alfonso Proto

Pier C Barbe'

Angelo Pricca

Pier Camillo Barbe&prime;

Umberto Scata&prime;

Maurizio Stefano Galimberti

Italo Borghi

Giovanni Baruzzi

Marco Foa'

Umberto Zucchini

L Lawrence Chapoy

Matteo Nicolini

Alfredo Coassolo

Luciano Del Giudice

Giampiero Sabarino

Ermanno Susa

Giuseppe Gianotti

Adolfo Mayr

Giovanni Giunchi

Umberto Scata

Ettore Giachetti

Elisabetta Barbassa

Umberto Scata'

Bruno Pivotto

BarbePier C

Umerto Scata'

Catalysts for the polymerization of olefins

Components and catalysts for the polymerization of olefins

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 Mg dihalide in active form and, supported thereon, a Ti halide or a halo-Ti-alcoholate and a particular, selected type of electron-donor compound.

Spherical components of catalysts for the polymerization of olefins comprising:

Spherical components and catalysts for the polymerization of olefins

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 formula: ##STR1## wherein the radicals R are the same or different, the radicals R.sup.I are the same or different, and R and R.sup.I are C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.20 cycloalkyl, C.sub.6 -C.sub.12 aryl, C.sub.7 -C.sub.20 arylalkyl or alkylaryl radicals or hydrogen, with the proviso that at least one of the R radicals is not hydrogen and can be bonded with the other R radical to form a cyclic structure, and at least one of the R.sup.I radicals, which are not bonded to one another to form a cyclic structure, is a branched alkyl, cycloalkyl or aryl radical, or is bonded to one or both R radicals to form a cyclic structure.

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.sub.2 Y ##STR2## where r=0-10, Y is a halogen atom, R.sup.1 is a hydrocarbon radical with 1-18 carbon atoms.

Alpha olefins functionalized polymers

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:

Process for producing crystalline vinyl aromatic polymers having mainly

Catalysts for the polymerization of olefins, comprising the product of the reaction between:

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 specific reactivity properties towards MgCl.sub.2 and TiCl.sub.4 are supported.

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 radicals, supported on a magnesium halide in active form. Also disclosed are catalysts obtained from said catalyst components and from an Al-alkyl compound, as well as catalysts obtained by the reaction of an Al-alkyl compound and a silicon compound of the formula above with a solid catalyst component comprising a titanium halide or halogen alcoholate and an electron-donor compound having specific characteristics of extractability with Al-triethyl, supported on an active magnesium halide.

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 halogen atoms or at least one double bond, or both at least one heteroatom and at least one double bond, supported on a magnesium halide in active form. Catalysts obtained from said catalyst components and an Al-alkyl compound, as well as catalysts obtained by the reaction of an Al-alkyl compound and an ether having the above defined characteristics with a solid catalyst component comprising a titanium halide or alkoxyhalide and an electron-donor compound having particular characteristics of extractability with Al-triethyl, supported on activated magnesium halide.

Catalysts for the polymerization of olefins, obtained from special zirconocenic compounds and from alkyl-Al compounds.

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:

Imidized acrylic polymers and process for their preparation

Growing community of inventors

Milan, Italy

Umberto Giannini