1
Galen C Richeson, Glenn A Stahl, James J McAlpin, Anthony N Speca: Nonwoven fabrics. Exxon Chemical Patents, Paige Schmidt, April 6, 1999: US05891814 (35 worldwide citation)

This invention relates to improved polypropylene nonwoven fabrics. The fabrics are made from isotactic polypropylene which has been produced with a catalyst systems comprising at least two metallocenes. These nonwoven fabrics, particularly when prepared using a spunbonding process, exhibit significa ...


2
Aspy K Mehta, Michael C Chen, James J McAlpin, Anthony N Speca, Kelly Tormaschy, Chon Y Lin: Propylene polymers for films. ExxonMobil Chemical Patents, Paige Schmidt, Kevin M Faulkner, Leandro Arechederra, June 10, 2003: US06576306 (30 worldwide citation)

This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The composition ...


3
Anthony N Speca, Jeffrey L Brinen, James J McAlpin: Engineered catalyst systems and methods for their production and use. Exxon Chemical Patents, Paige Schmidt, July 28, 1998: US05786291 (25 worldwide citation)

This invention relates to supported metallocene catalyst systems and to methods for their production and use. Specifically, this invention relates to supported catalyst systems having unique, predetermined properties resulting from the designed distribution of catalyst components within and upon por ...


4
Aspy K Mehta, Michael C Chen, James J McAlpin, Anthony N Speca, Kelly Tormaschy, Chon Y Lin: Propylene polymers for films. ExxonMobil Chemical Patents, Paige Schmidt, Kevin M Faulkner, Leandro Arechederra, June 24, 2003: US06583227 (24 worldwide citation)

This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The composition ...


5
Anthony N Speca: Support adjuvant for improved vanadium polymerization catalyst. Exxon Chemical Patents, T Dean Simmons, November 12, 1991: US05064796 (20 worldwide citation)

A vanadium catalyst component for the polymerization of 1-olefins and a process for making said catalyst component are disclosed. The catalyst component is prepared by fluoriding a support comprising silica. Use of the catalyst component provides a catalyst with increased activity, increased respons ...


6
Anthony N Speca: Highly active supported catalyst compositions. Exxon Mobil Chemical Patents, Kevin M Faulkner, David J Alexander, April 9, 2002: US06368999 (20 worldwide citation)

This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride cont ...


7
Jeffrey L Brinen, Anthony N Speca, Kelly Tormaschy, Kathryn A Russell: Method for making supported catalyst systems and catalyst systems therefrom. Exxon Chemical Patents, Hoechst, C Paige Schmidt, April 29, 1997: US05625015 (17 worldwide citation)

Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves techniques for evenly distributing a small volume of catalyst component over and among a porous support material. Such even distribution is thou ...


8
Anthony N Speca: Intermetallic compounds of polymeric transition metal oxide alkoxides and catalytic use thereof. National Distillers and Chemical Corporation, Kenneth D Tremain, April 23, 1985: US04513095 (13 worldwide citation)

Polymeric transition metal oxide alkoxides are converted by reaction with a reducing metal having a higher oxidation potential then the transition metal to a catalyst precursor, activated with a halide to form a catalyst component for olefin polymerization. Particularly exemplified are the reaction ...


9
Anthony N Speca: Polymerization catalyst prepared with a halogenated silane compound. Exxon Chemical Patents, J F Hunt, T D Simmons, January 1, 1991: US04981826 (13 worldwide citation)

Described is a magnesium-transition metal containing catalyst component, comprising a solid reaction product obtained by treating a solid support material in an inert solvent in any order with (A) a halogenated silane compound, (B) an alkoxy-containing magnesium compound, (C) and acyl halide, (D) at ...


10
Anthony N Speca: Highly active supported catalyst compositions. ExxonMobil Chemical Patents, Paige Schmidt, Kevin M Faulkner, February 25, 2003: US06524988 (13 worldwide citation)

This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride cont ...