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 invention provide a class of ethylene/α-olefin block interpolymers. The ethylene/α-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, M w /M n , greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block ethylene/α-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (“TREF”), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the ethylene/α-olefin interpolymer has a molecular weight distribution, M w /M n , greater than about 1.3.

Ethylene/alpha-olefins block interpolymers

This invention relates to polyolefin compositions. In particular, the invention pertains to elastic polymer compositions that can be more easily processed on cast film lines, extrusion lamination or coating lines. The compositions of the present invention preferably comprise an elastomeric polyolefin resin and a high pressure low density type resin.

Compositions of ethylene/alpha-olefin multi-block interpolymer for elastic films and laminates

A fiber is obtainable from or comprises an ethylene/α-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams/cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481−1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics can be made from such fibers.

Fibers made from copolymers of ethylene/alpha-olefins

An adhesive composition comprises: (i) at least one ethylene/α-olefin interpolymer, (ii) at least one tackifEer; and (iii) optionally at least one additive, such as a plasticizer, wax and antioxidant. Preferably, the ethylene/α-olefm interpolymer has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm ≥ 858.91 - 1825.3(d) + 1112.8(d)2. The composition has relatively higher SAFT temperature and can be used in hot melt adhesives pressure-sensitive adhesives, and thermoplastic marking paints.

Adhesive and marking compositions made from interpolymers of ethylene/alpha-olefins

Polymer blends comprises 1) at least one ethylene/α-olefin interpolymer and 2) at least one polyolefin, or at least one styrenic block copolymer, or a combination thereof. Such polyolefins include, but are not limited to, high melt strength high density polyethylene and high melt strength polypropylene. The ethylene/α-olefin interpolymers are random block copolymers comprising at least a hard block and at least a soft block. The polyolefins can be homopolymers or interpolymers. The resulting polymer blends can be used to make flexible molded articles.

Polymer blends from interpolymers of ethylene/alpha-olefins and flexible molded articles made therefrom

Anti-blocking polymer compositions comprise at least one ethylene/α-olefEninterpolymer and at least one anti-blocking agent comprising an amide. The ethylene/α-olefEn interpolymers are a multi-block copolymer comprising at least one soft block and at least one hard block. The anti-blocking agent can be erucamide or other amides. The anti blocking polymer composition has a pellet blocking strength of equal to or less than (100) lbs/ft2 (4800 Pa). When the anti-blocking polymer composition is made into a film, the film has a blocking force of less than about (100) grams, measured according to ASTM method (D-3354).

Anti-blocking compositions comprising interpolymers of ethylene/alpha-olefins

Du melange de polymere comprend (1) au moins un interpolymere d'ethylene/a-olefine et 2) au moins une polyolefine, ou au moins un copolymere bloc styrenique, ou l'une de leurs combinaisons. De telles polyolefines incluent, de facon non limitative, du polyethylene haute densite a haute resistance a la fusion et du polypropylene a haute resistance a la fusion. Les interpolymeres d'ethylene/a-olefine sont des copolymeres blocs aleatoires comprenant au moins un bloc dur et au moins un bloc souple. Les polyolefines peuvent etre homopolymeres ou interpolymeres. Les melanges de polymeres obtenus convient a la confection d'articles moules souples.

Yunwa Wilson Cheung

Papers

Polymer blends from interpolymers of ethylene/alpha-olefins and flexible molded articles made therefrom

Anti-blocking compositions comprising interpolymers of ethylene/alpha-olefins

Melanges polymeres a base d'interpolymeres d'ethylene/alpha-olefines et articles moules souples ainsi obtenus