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

Disclosed herein are polymer blends comprising at least one ethylene/α-olefin interpolymer and two different polyolefins which can be homopolymers. The ethylene/α-olefin interpolymers are block copolymers comprising at least a hard block and at least a soft block. In some embodiments, the ethylene/α-olefin interpolymer can function as a compatibilizer between the two polyolefins which may not be otherwise compatible. Methods of making the polymer blends and molded articles made from the polymer blends are also described.

Polymer blends from interpolymer of ethylene/alpha olefin with improved compatibility

Polymer blends comprise at least an ethylene/α-olefin interpolymers and at least one polyolefin. The polyolefins can be homopolymers or interpolymers and have a melt strength of at least about 6 cN. The ethylene/α-olefin interpolymer is a block copolymer having at least a hard block and at least a soft block. The soft block comprises a higher amount of comonomers than the hard block. The block interpolymer has a number of unique characteristics disclosed here. The polymer blends can be profiled extruded to make profiles, gaskets, and other products.

Interpolymers of ethylene/alpha-olefins blends and profiles and gaskets made therefrom

A lubricant composition comprises an ethylene/α-olefin interpolymer having a number average molecular weight of less than 10,000 g/mol as a base oil and at least one oil additive. The ethylene/α-olefin interpolymer has at least one molecular fraction which elutes between 40° C. and 130° C. when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer.

Low molecular weight ethylene/alpha-olefin interpolymer as base lubricant oils

INSITE™ technology has enabled the synthesis of ethylene/styrene interpolymers (ESI) using single site constrained geometry catalysts. The current focus is on ESI containing up to about 50 mole % (∼ 80 wt%) copolymer styrene content. These ESIs encompass materials ranging from crystalline to amorphous microstructure, dependent upon the copolymer styrene content. Materials engineering through blending of ESI's with other thermoplastic polymers can be used to expand the material performance envelope, and design materials to meet specific performance requirements. The performance requirements of potential applications currently under development for ESI can be met by thermoplastic blends with one or more thermoplastic polymers. ESIs exhibit compatibility with a wide range of polymers because of their inherent combination of olefinic and styrenic functionality. Blends of ESI with PS, PE, and PP, in particular, have been found to offer interesting and unique combinations of performance properties. The selection of blend components, blend composition ratio and final part fabrication conditions are key factors in determining structure/property relationships. Appropriate morphology/rheology modeling is useful in blend design.

Blends of Ethylene/Styrene Interpolymers and Other Polymers: Benefits in Applications

PROBLEM TO BE SOLVED: To provide a filled polymer composition including an ethylene/α-olefin interpolymer and a filler, and to provide a method of making the filled polymer composition and products made therefrom.SOLUTION: The filled polymer composition includes (i) an ethylene/α-olefin interpolymer, and (ii) a filler. The ethylene/α-olefin interpolymer is a block copolymer having at least a hard block and at least a soft block. The soft block includes a higher amount of comonomers than the hard block. The block interpolymer has a number of unique characteristics. The filled polymer compositions provided herein, in certain embodiments, have relatively higher heat resistance and improved noise, vibration and harshness properties and can be used in automotive floorings, roofings, wire and cable coating applications.

Yunwa Wilson Cheung

Papers

Polymer blends from interpolymer of ethylene/alpha olefin with improved compatibility

Interpolymers of ethylene/alpha-olefins blends and profiles and gaskets made therefrom

Low molecular weight ethylene/alpha-olefin interpolymer as base lubricant oils

Blends of Ethylene/Styrene Interpolymers and Other Polymers: Benefits in Applications

FILLED POLYMER COMPOSITION MADE FROM INTERPOLYMER OF ETHYLENE/α-OLEFIN AND USE THEREOF