Montell North America Inc.

Himont Incorporated

Basell Poliolefine Italia, S.p.a.

Basell Technology Company B.v.

Constantine A Stewart

Eric J Evain

Ofelia Fusco

Giovanni Baruzzi

Angelo Ferraro

Crystal A Smith

A process for preparing porous olefin polymers comprising bringing into contact in a polymerization reactor, at a temperature T, one or more olefins of the formula (I) CH&#x2550;CHR, Rbeing hydrogen, a C&#x2013;C-alkyl or a C&#x2013;C-aryl group, with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal-&#x3c0; bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the temperature up to the polymerization temperature, said process being characterized in that: a) if the temperature Tis lower than 40&#xb0; C., the temperature is raised up to the polymerization temperature is such a way that, for a time of at least one minute after the introduction temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the temperature of the reaction Tfulfills the following condition of formula (II) wherein m is the time expressed in minutes employed for reaching the temperature T; or b) if temperature Tis 40&#xb0; C. or higher, the reactor is maintained for a time of at least one minute at a temperature of at least 40&#xb0; C.

Process for the preparation of porous polymers and polymers obtainable thereof

Aromatic silane compounds containing at least an aromatic ring bound directly to the silicon atom, wherein the aromatic ring has at least one substituent located in the ortho position selected from Chydrocarbon groups, are useful as electron donors in olefin polymerization catalysts for the production of polyolefins having a stereoblock content of from about 7 to about 25%.

Alpha-olefin polymerization catalyst system which contains an aromatic silane compound

Aromatic silane compounds containing at least an aromatic ring bound directly to the silicon atom, wherein the aromatic ring has at least one substituent located in the ortho position selected from C hydrocarbon groups, are useful as electron donors in olefin polymerization catalysts for the production of polyolefins having a stereoblock content of from about 7 to about 25%.

Organosilane compounds having the structural formula ##STR1## wherein R is a linear or branched C.sub.1-4 alkyl, 4-methylpiperidyl, C.sub.6-12 aryl or C.sub.5-7 cycloalkyl; R.sup.1 is hydrogen, methyl or ethyl, R.sup.2 is methyl or ethyl and; n is 4 to 7. These organosilane compounds are useful as electron donors in Ziegler-Natta type catalyst systems.

Organosilane compounds

An aminosilane of the formula: ##STR1## where R.sub.1 is a linear or branched C.sub.1-22 alkyl or C.sub.3-22 cycloalkyl, which may be substituted with at least one halogen atom; R.sub.2 is a bis(linear or branched C.sub.1-22 alkyl or C.sub.3-22 cycloalkyl)amino, a substituted piperidinyl, a substituted pyrrolidinyl, decahydroquinolinyl, 1,2,3,4-tetrahydroquinolinyl or 1,2,3,4-tetrahydroisoquinolinyl, with the substituent selected from the group consisting of C.sub.1-8 alkyl, pheny. C.sub.1-8 linear or branched alkylsubstituted phenyl and trimethylsilyl, with the proviso that when the substituent is C.sub.1-8 alkyl, there must be at least two such substituent groups present and R.sub.1 must contain halogen; and R.sub.3 is a linear or branched C.sub.1-8 alkyl or C.sub.3-8 cycloalkyl. The aminosilane may be reacted with an aluminum-alkyl compound and a solid component comprising a titanium compound having at least one titanium-halogen bond and an electron donor, both supported on an activated anhydrous magnesium dihalide, to form a catalyst for polymerization of olefins.

Catalyst for the polymerization of alpha-olefins containing substituted

Organosilane compounds having the structural formula ##STR1## wherein R is a linear or branched C.sub.1-4 alkyl, 4-methyl-piperidyl, C.sub.6-12 aryl or C.sub.5-7 cycloalkyl; R.sup.1 is hydrogen, methyl or ethyl; R.sup.2 is methyl or ethyl and; n is 4 to 7. These organosilane compounds are useful as electron donors in Ziegler-Natta type catalyst systems.

Disclosed are catalysts for the polymerization of alpha-olefins comprising the reaction product of:

Growing community of inventors

Wilmington, DE, United States of America

Constantine A Stewart