A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.

Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation

Embodiments of the present invention relate to article comprising 1) a functionalized component, 2) tackifier, and 3) an olefin polymer comprising one or more C3 to C40 olefins, optionally one or more diolefins, and less than 5 mole % of ethylene having a Dot T-Peel of 1 Newton or more, a branching index (g′) of 0.95 or less measured at the Mz of the polymer; and an Mw of 100,000 or less; where the functional component is selected from the group consisting of functionalized polymers, functionalized oligomers and beta nucleating agents; and where the Gardner color of the adhesive does not change by more than 7 Gardner units when the adhesive has been heat aged at 180° C. for 48 hours as compared to the Gardner color of the unaged composition.

Polyolefin adhesive compositions and articles made therefrom

A catalyst composition for olefin polymerization and copolymerization which contains a complex of Ti, V, Zr, or Hf with a bidentate ligand or a tridentate ligand and a cocatalyst mixture containing dialkylaluminum halide and dialkylmagnesium. The bidentate ligands are described by general formulas Z-R-Z or Z-R-W-R-Z where R is an alkylene, cycloalkylene, arylene, or alkylarylene group; W is CH2, O, S, N-R', or SiR'2 where R' is an alkyl or aryl grup; and Z is O, S, N-H, or C(=O)-O. The tridentate ligands are described by formulas Z-(R-Z)-Z or Z-(R-U)-Z where R is an alkylene or arylene group; and Z and U are different and are O, S, N-H, or C-(=O)-O.

Olefin polymerization catalyst

A resin composition which comprises (A) 95-5 wt.% polylactic acid resin and (B) 5-95 wt.% aromatic polycarbonate resin and, compounded therewith per 100 parts by weight of the sum of (A) and (B), (C) a polymer containing an acrylic resin or styrene resin unit grafted thereto, (D) a polymer with which a glycidyl compound or acid anhydride has been grafted or copolymerized, and (E) one or more compatibilizing agents such as at least one compatibilizing agent selected among oxazoline compounds, oxazine compounds, and carbodiimide compounds.

Resin composition and molded article comprising the same

The invention relates to processes and plants for continuous solution polymerization. Such plant and processes include a pressure source, a polymerization reactor, downstream of said pressure source, pressure let-down device, downstream of said polymerization reactor, and a separator, downstream of said pressure let-down device, wherein said pressure source is sufficient to provide pressure to said reation mixture during operation of said process plant to produce a single-phase liquid reaction mixture in said reactor and a two-phase liquid-liquid reaction mixture in said separator in the absence of an additional pressure source between said reactor and said separator.

Processes and apparatus for continuous solution polymerization

Substantially linear ethylene polymers, e.g., polyethylenes prepared by constrained geometry catalysis (substantially linear ethylene), which are grafted with one or more unsaturated organic compounds containing both ethylenic unsaturation and a carbonyl group, e.g., maleic anhydride, exhibit desirable adhesive properties. These graft-modified substantially linear ethylene polymers also impart desirable compatibility and impact properties to various thermoplastic polymer blends.

Graft-modified, substantially linear ethylene polymers and methods for their use

Ethylene, an α-olefin and, optionally, a diene monomer are polymerized in a process comprising the step of contacting (1) ethylene, (2) at least one C 3 -C 20 aliphatic α-olefin, (3) optionally, at least one C 4 -C 20 diene, (4) a catalyst comprising (a) a metallocene complex, and (b) an activator, and (5) a solvent. The process is conducted in either a single reactor or in multiple reactors, the latter configured either in series or parallel. Solvent is removed from the polymer stream in an anhydrous, first stage solvent recovery operation such that the solids concentration of the product stream is increased by at least 100 percent. Additional solvent is removed in an anhydrous, second stage solvent recovery operation from the product of the first stage solvent recovery operation such that the solids concentration of the product stream is in excess of 65 weight percent.

Metallocene-catalyzed process for the manufacture of EP and EPDM polymers

Containers for foods, juices and beverages containing essential oils or flavorings are comprised of a laminate structrue in which the inner surface of the container, in contact with the foods, juices or beverage, is a halopolymer, such as a vinylidene chloride polymer, which functions as a barrier layer to substantially restrict the passage or migration of the essential oils or flavorings.

Containers having internal barrier layers

OF THE DISCLOSURE A magnesium halide catalyst support is prepared by combining a magnesium component represented by the general formula R2Mg?xAlR'3 wherein R is a hydrocarbyl or a hydrocarbyloxy group; R' is a halide, hydrocarbyl, a hydrocarbyloxy, a carboxyl or an acyl group; and x has a value such that the atomic ratio of Al:Mg is 0.025:1 to 0.25:1 with a non-metallic halide source under conditions such that the reaction temperature does not exceed 60°C. The invention also concerns a magnesium halide supported transition metal catalyst wherein the transition metal component is a compound of the formula Tm(OR)yXy-x wherein Tm, R, X, y and x are as defined in the specification and a process for polymerizing one or more olefins using the aforementioned magnesium halide supported catalyst.

Magnesium halide catalyst support and transition metal catalyst prepared thereon

Extrusion-cast films of high molecular weight, linear, low density ethylene copolymers which inherently have high block and high cling characteristics are compounded with a minor amount of a low molecular weight organic, such as a polyglycol, before being extrusion-cast as a thin film, the low molecular weight organic serving to substantially reduce the block, but retaining high cling characteristics.

Morris S. Edmondson

Papers

Graft-modified, substantially linear ethylene polymers and methods for their use

Metallocene-catalyzed process for the manufacture of EP and EPDM polymers

Containers having internal barrier layers

Magnesium halide catalyst support and transition metal catalyst prepared thereon

Anti-block additives for olefin polymers