Braskem S.a.

Universidade Federal Do Rio Grande Do Sul

Universidade Federal Do Rio Grande Do Sul-ufrgs

Rodrigo Brambilla

Marcia Silva Lacerda Miranda

Joao Henrique Zimnoch Dos Santos

Fernando Silveira

Adriane Gomes Simanke

Adriano Giraldi Fisch

Etienne Marcos De Almeida Rocha

Márcia Silva Lacerda Miranda

Maila Noeli Cardoso

Daiane Schilling De Vargas

Arthur Alaim Bernardes

Ana Cristina Fontes Moreira

Maria Angelica Cardoso Gollmann

Maria Angélica Cardoso Gollmann

The instant invention relates to the use of titanium-based oxopolymers for preparing suitable catalysts for reactions of olefin polymerization and/or olefin and alpha-olefin copolymerization. The instant invention further discloses the synthesis of catalyst formulated from titanium-based oxopolymers, as well as its use for olefin polymerization and/or copolymerization reactions.

Multisite heterogeneous catalyst, process for preparing the same and process for obtaining polyolefins using said catalyst

A polymer composition may include a plurality of ethylene-based polymers forming a multimodal composition distribution, each having a distinct crystallization peak in a CEF curve. A process of making a polymer composition may include melt blending a plurality of polyethylenes with different microstructural characteristics in the molten state. Another process of making a polymer composition may include polymerizing ethylene and an optional alpha olefin in combination with a plurality of metallocene catalysts in a polymerization reactor to form a plurality of ethylene based polymers. Yet another process of making a polymer composition may include polymerizing ethylene and an optional alpha olefin in combination with a multimetal catalyst in a polymerization process to form a plurality of ethylene based polymers.

Ethylene alpha-olefin copolymers with multimodal comonomer distributions and processes for obtaining the same

The present invention describes a metallocene catalyst based on a transition metal of group 4 or 5 of the periodic table, supported on a hybrid catalytic support provided with aliphatic organic groups, and a process for supporting metallocene on the hybrid catalytic support. The supported metallocene catalyst provides an ethylene polymer with broad or bimodal molecular weight distribution, in the presence of only one metallocene complex on the support.

Metallocene catalyst supported by hybrid supporting means, process for producing same, polymerization process for producing an ethylene homopolymer or copolymer with broad or bimodal molar mass distribution, use of the supported metallocene catalyst and ethylene polymer with broad or bimodal molar mass distribution

The present invention pertains to a metallocene catalyst based on a transition metal of groups 4 or 5 of the periodic table prepared by the immobilization of a metallocene complex on a support modified with hybrid soluble silica, prepared by a non-hydrolytic sol-gel process. There is also described a process for preparing said catalyst. The supported metallocene catalyst of the present invention has the advantages of high catalytic activity, morphology, besides the fact of producing copolymers of ethylene with alpha-olefins having molecular behavior that will bring benefits in mechanical properties, such as resistance to tearing, piercing and impact, as well as improved optical and weldability properties.

Metallocene catalyst based on a transition metal of groups 4 or 5 of the periodic table immobilized on a support modified with soluble hybrid silica, method for producing and using same

The present invention describes a metallocene catalyst based on a transition metal of group 4 or 5 of the periodic table; supported on a hybrid catalytic support with aliphatic organic groups and a process for supporting metallocene on the hybrid catalytic support. The supported metallocene catalyst provides an ethylene polymer with broad or bimodal molecular weight distribution in the presence of only one metallocene complex on the support.

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Porto Alegre, Brazil

Rodrigo Brambilla