1
Eric J Markel, Weiqing Weng, Armen H Dekmezian, Andrew J Peacock: Thermoplastic elastomer compositions from branched olefin copolymers. Exxon Chemical Patents, William G Muller, Frank E Reid, November 14, 2000: US06147180 (138 worldwide citation)

The invention relates to a thermoplastic elastomer composition comprising a branched olefin copolymer derived from olefinically unsaturated monomers capable of insertion polymerization having A) a T.sub.g as measured by DSC less than or equal to 10.degree. C.; B) T.sub.m greater than 80.degree. C.; ...


2
Weiqing Weng, Armen Dekmezian, Eric J Markel, Avinash Gadkari, David L Peters: Vinyl-containing stereospecific polypropylene macromers. Exxon Chemical Patents, Brent M Peebles, W G Muller, September 12, 2000: US06117962 (90 worldwide citation)

Stereospecific polypropylene macromers having a high percentage of vinyl terminal bonds and a method for preparing them are provided. The stereospecific polypropylene macromers have number average molecular weights (M.sub.n) of about 2,000 Daltons to about 50,000 Daltons, and the total number of vin ...


3
Weiqing Weng, Eric J Markel, Armenag H Dekmezian, Palanisamy Arjunan: Branched polypropylene compositions. Exxon Chemical Patents, William G Muller, Douglas W Miller, Charles E Ronyan, May 1, 2001: US06225432 (87 worldwide citation)

Branched polypropylene compositions which have improved melt strength and good processability are provided. The branched polypropylene compositions of the present invention have a polydispersity of less than 4.0 and a melt point greater than 90° C. Further, the weight average branching index g of th ...


4
Weiqing Weng, Armen Dekmezian, Eric J Markel, Avinash Gadkari, David L Peters: Propylene polymers incorporating macromers. Exxon Chemical Patents, Brent M Peebles, David J Alexander, Paige Schmidt, March 6, 2001: US06197910 (59 worldwide citation)

A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, repeating units of one or more comonomers, wherein the total comonomer repeating unit content of the polyolefin composition is from 0 to 20 mole percent, and further, wherein the weight averag ...


5
Weiqing Weng, Armen H Dekmezian, Eric J Markel, David L Peters: Elastomeric propylene polymers. Exxon Chemical Patents, Brent M Peebles, David J Alexander, Charles E Runyan, February 6, 2001: US06184327 (59 worldwide citation)

A thermoplastic elastomer is provided comprising a branched olefin polymer having crystalline sidechains and an amorphous backbone wherein at least 90 mole percent of the sidechains are isotactic or syndiotactic polypropylene and at least 80 mole percent of the backbone is atactic polypropylene. Add ...


6
Weiqing Weng, Armenag Hagop Dekmezian, Eric John Markel, David L Peters: Propylene polymers incorporating macromers. ExxonMobil Chemical Patents, Charles E Runyan, January 29, 2002: US06342574 (44 worldwide citation)

A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, one or more comonomers, wherein the total comonomer content of the polyolefin composition is from 0 to 20 mole percent, and further, wherein the weight average branching index g′ for the lower ...


7
Weiqing Weng, Armen Dekmezian, Eric J Markel, Avinash Gadkari, Jean Marc Dekoninck: Propylene polymers incorporating polyethylene macromers. Exxon Mobil Chemical Patents, Charles E Runyan, June 15, 2004: US06750307 (40 worldwide citation)

A polyolefin product is provided which comprises a branched olefin copolymer having an isotactic polypropylene backbone, polyethylene branches and, optionally, one or more comonomers. The total comonomer content of the branched olefin copolymer is from 0 to 20 mole percent. Also, the mass ratio of t ...


8
Weiqing Weng, Srivatsan Srinivas, Robert J Wittenbrink: Polymerization process. ExxonMobil Chemical Patents, Michael Kerns, September 4, 2007: US07265193 (38 worldwide citation)

This invention relates to a process to polymerize olefins comprising: contacting: (i) propylene and (ii) a mixture comprising, optionally ethylene, and three or more different alpha olefins having 4 to 20 carbon atoms, wherein at least one alpha olefin is present at Z percent or more, based upon the ...


9
Eric J Markel, Weiqing Weng, Armenag H Dekmezian: Branched semi-crystalline high-C3 ethylene-propylene compositions. ExxonMobil Chemical Patents, Charles E Runyan, Mandi Milbank, June 3, 2003: US06573350 (38 worldwide citation)

Branched ethylene-propylene compositions which have improved melt strength and shear thinning are provided. The weight average branching index g′ for the higher molecular weight region of the ethylene-propylene composition is less than 0.95. Additionally, a novel process is provided for efficiently ...


10
Weiqing Weng, Armen Dekmezian, Eric J Markel, Avinash Gadkari, Jean Marc Dekoninck: Propylene polymers incorporating polyethylene macromers. ExxonMobil Chemical Patents, December 9, 2003: US06660809 (34 worldwide citation)

A polyolefin product is provided which comprises a branched olefin copolymer having an isotactic polypropylene backbone, polyethylene branches and, optionally, one or more comonomers. The total comonomer content of the branched olefin copolymer is from 0 to 20 mole percent. Also, the mass ratio of t ...