1
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 ...


2
Charles Cozewith, Gary William Ver Strate, Roger K West, Gaetano A Capone: Ethylene .alpha.-olefin block copolymers and methods for production thereof. Exxon Chemical Patents, Douglas W Miller, March 31, 1998: US05733980 (75 worldwide citation)

This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene polymer optionally containing an alpha-olefin and is generally crystalline. The B block contains an ethylene, ...


3
James J McAlpin, Glenn A Stahl: Fibers and oriented films of polypropylene higher .alpha.-olefin copolymers. Exxon Chemical Patents, Douglas W Miller, November 5, 1996: US05571619 (69 worldwide citation)

A propylene, .alpha.-olefin copolymer, where the .alpha.-olefin has 5 or more carbon atoms made with a metallocene catalyst system provides substantially higher cold flow resistance from when the propylene copolymer is made with an .alpha.-olefin having 4 or less carbon atoms. Other properties such ...


4
Charles Cozewith, Gary William Ver Strate, Roger K West, Gaetano A Capone: Ethylene-alpha olefin block copolymers and methods for production thereof. Exxon Chemical Patents, Douglas W Miller, August 25, 1998: US05798420 (61 worldwide citation)

This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene polymer optionally containing an alpha-olefin and optionally a non-conjugated diene, and is generally crystal ...


5
George Byron Georgellis, Chia Yung Cheng, William Moa Tseng Chien: Polypropylene copolymer alloys and process for making. Exxon Chemical Patents, Douglas W Miller, C Paige Schmidt, November 30, 1999: US05994482 (59 worldwide citation)

The present invention relates to polypropylene alloys which are especially suited for soft fiber and fabric applications. An embodiment of these alloys comprise an ethylene-propylene random copolymer having an ethylene content of from about 1.0 to 5.0% by weight, in an amount of from about 40 to 90% ...


6
Bradley P Etherton, James J McAlpin, Terrence Huff, Edward N Kresge: Unsaturated propylene/.alpha., .omega.-diene copolymers. Exxon Chemical Patent, Myron B Kurtzman, Douglas W Miller, April 2, 1996: US05504171 (47 worldwide citation)

Disclosed are unsaturated .alpha.-olefin/.alpha.,.omega.-diene copolymers, and a method of preparation thereof. The copolymers are generally crystalline, free of gel and cross-links, and contain unsaturated side chains and long chain branching. The copolymers contain up to 5 mole percent diene incor ...


7
Maria D Ellul, Donald R Hazelton, Periagaram S Ravishankar: Thermoplastic elastomers having improved cure. Exxon Chemical Patents, Douglas W Miller, August 12, 1997: US05656693 (41 worldwide citation)

Thermoplastic elastomers containing ethylene, alpha-olefin, vinyl norbornene elastomeric polymers provide superior cure levels to thermoplastic elastomers containing ethylene, alpha-olefin, diene monomer elastomeric polymers with other dienes than vinyl norbornene. The elastomeric polymers, along wi ...


8
Nemesio Delgado Miro, George Byron Georgellis, Homer Swei: Dual donor catalyst system for the polymerization of olefin. Exxon Chemical Patents, Douglas W Miller, August 29, 2000: US06111039 (40 worldwide citation)

The present invention provides a catalyst system that exhibits unexpected control of desired properties in polyolefin products. The catalyst system includes a titanium-supported catalyst in combination with a mixture of tetraethoxysilane (TEOS) and dicyclopentyldimethoxy-silane (DCPMS). This catalys ...


9
F Glenn Lively: Insulated pipe. Douglas W Miller, June 4, 2002: US06397895 (38 worldwide citation)

Pipes or pipelines insulated and optionally coated on their interior surface or surfaces are described. Pipes or pipelines insulated and optionally coated on their exterior surface or surfaces are also contemplated, The pipes or pipelines may be for submerged service, below the surface of water. The ...


10
Glenn Allan Stahl, James John McAlpin: Fibers and fabrics incorporating lower melting propylene polymers. Exxon Chemical Co, Douglas W Miller, March 10, 1998: US05726103 (37 worldwide citation)

Propylene homopolymers and copolymers formed by metallocene catalyst system exhibit generally lower melting behavior than previous propylene polymers. This lower melting behavior will be of use in the fabrication and use of fibers and fabrics that depend upon either lower melting behavior in general ...