Patents by Inventor James J. McAlpin
James J. McAlpin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6583227Abstract: 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 compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films.Type: GrantFiled: March 6, 2001Date of Patent: June 24, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Aspy K. Mehta, Michael C. Chen, James J. McAlpin, Anthony N. Speca, Kelly Tormaschy, Chon Y. Lin
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Patent number: 6576306Abstract: 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 compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films.Type: GrantFiled: March 6, 2001Date of Patent: June 10, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Aspy K. Mehta, Michael C. Chen, James J. McAlpin, Anthony N. Speca, Kelly Tormaschy, Chon Y. Lin
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Publication number: 20010044506Abstract: 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 compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films.Type: ApplicationFiled: March 6, 2001Publication date: November 22, 2001Inventors: Aspy K. Mehta, Michael C. Chen, James J. McAlpin, Anthony N. Speca, Kelly Tormaschy, Chon Y. Lin
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Publication number: 20010039314Abstract: 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 compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films.Type: ApplicationFiled: March 6, 2001Publication date: November 8, 2001Inventors: Aspy K. Mehta, Michael C. Chen, James J. McAlpin, Anthony N. Speca, Kelly Tormaschy, Chon Y. Lin
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Patent number: 5891814Abstract: 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 significantly improved strength without significant sacrifice of other favorable properties.Type: GrantFiled: February 18, 1997Date of Patent: April 6, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Galen C. Richeson, Glenn A. Stahl, James J. McAlpin, Anthony N. Speca
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Patent number: 5786291Abstract: 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 porous support particles. The designed distribution of catalyst components is obtained through sequential deposition of catalyst components with intervening removal of solvent.Type: GrantFiled: February 18, 1997Date of Patent: July 28, 1998Assignee: Exxon Chemical Patents, Inc.Inventors: Anthony N. Speca, Jeffrey L. Brinen, James J. McAlpin
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Patent number: 5571619Abstract: 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 as ultimate tensile strength and impact strength are substantially higher as well. Such polymers can be used to advantage in fibers, fabrics, and oriented films.Type: GrantFiled: May 24, 1994Date of Patent: November 5, 1996Assignee: Exxon Chemical Patents, Inc.Inventors: James J. McAlpin, Glenn A. Stahl
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Patent number: 5514761Abstract: 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 incorporated therein, and may be prepared by copolymerization using a solid-phase, insoluble coordination catalyst, without a solvent, and below the crystalline melting point of the copolymer.Type: GrantFiled: February 10, 1995Date of Patent: May 7, 1996Assignee: Exxon Chemical Patents Inc.Inventors: Bradley P. Etherton, James J. McAlpin, Terrence Huff, Edward N. Kresge
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Patent number: 5504171Abstract: 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 incorporated therein, and may be prepared by copolymerization using a solid-phase, insoluble coordination catalyst, without a solvent, and below the crystalline melting point of the copolymer.Type: GrantFiled: December 22, 1994Date of Patent: April 2, 1996Assignee: Exxon Chemical Patent Inc.Inventors: Bradley P. Etherton, James J. McAlpin, Terrence Huff, Edward N. Kresge
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Patent number: 5468440Abstract: Applications of isotactic polypropylene resin compositions produced from metallocene catalyst wherein the resins yield articles with comparable shear modulus and heat distortion temperature values to those of conventional polypropylene, but in which the fabrication of the article is achieved at temperatures much lower than possible for conventional polypropylene.Type: GrantFiled: May 6, 1994Date of Patent: November 21, 1995Assignee: Exxon Chemical Patents Inc.Inventors: James J. McAlpin, Jeffrey W. C. Kuo, Donald C. Hylton
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Patent number: 5210139Abstract: A thermoplastic olefin comprising an alloy of an olefin copolymer elastomer and a propylene/comonomer random copolymer is provided. The comonomer is selected from one or more of ethylene and C.sub.4 to C.sub.10 alpha-olefins. Polypropylene is an optional component of the alloy. The alloy may be produced by melt blending, reactor blending or a combination thereof, of the various components.Type: GrantFiled: February 6, 1991Date of Patent: May 11, 1993Assignee: Exxon Chemical Patents Inc.Inventors: Terrence Huff, James J. McAlpin
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Patent number: 5023300Abstract: A thermoplastic olefin comprising an alloy of an olefin copolymer elastomer and a propylene/comonomer random copolymer is provided. The comonomer is selected from one or more of ethylene and C.sub.4 to C.sub.10 alpha-olefins. Polypropylene is an optional component of the alloy. The alloy may be produced by melt blending, reactor blending or a combination thereof, of the various components.Type: GrantFiled: May 23, 1989Date of Patent: June 11, 1991Assignee: Exxon Chemical Patents Inc.Inventors: Terrence Huff, James J. McAlpin
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Patent number: 4952631Abstract: A modifier composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprising a polyolefin resin modified to contain a reactive Si(IV) moeity. A preferred embodiment comprises the reaction product obtained from the high shear dry blending of an alkylamino alkoxysilane with an acid modified polyolefin, preferably gamma-aminopropyltriethoxysilane dry blended with maleated polypropylene. Such modifier composition when compounded in from about 1 to about 10 weight percent with a polyolefin, preferably polypropylene, provides a resin from which cement adherent fibers may be produced.Type: GrantFiled: August 4, 1988Date of Patent: August 28, 1990Assignee: Exxon Chemical Patents Inc.Inventors: James J. McAlpin, Wai Y. Chow
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Patent number: 4861812Abstract: A modified composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprising a polyolefin resin modified to contain a reactive Si(IV) moiety. A preferred embodiment comprises the reaction product obtained from the high shear dry blending of an alkylamino alkoxysilane with an acid modified polyolefin, preferably gamma-aminopropyltriethoxysilane dry blended with meleated polypropylene. Such modifier composition when compounded in from about 1 to about 10 weight percent with a polyolefin, preferably polypropylene, provides a resin from which cement adherent fibers may be produced.Type: GrantFiled: December 23, 1986Date of Patent: August 29, 1989Assignee: Exxon Chemical Patents Inc.Inventors: James J. McAlpin, Wai Y. Chow
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Patent number: 4801630Abstract: A modifier composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprises the reaction product of a vinyl alcohol copolymer with an acid modified polyolefin. Such modifier composition when compounded in from about 1 to about 10 weight percent with a polyolefin, preferably polypropylene, provides a resin from which cement adherent fibers may be produced.Type: GrantFiled: May 4, 1987Date of Patent: January 31, 1989Assignee: Exxon Chemical Patents Inc.Inventors: Wai Y. Chow, James J. McAlpin
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Patent number: 4710540Abstract: A modifier composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprises the reaction product obtained from the high shear dry blending of an alkylamino alkoxysilane with an acid modified polyolefin, preferably .gamma.-aminopropyltriethoxysilane dry blended with maleated polypropylene. Such modifier composition when compounded in from about 1 to about 5 weight percent with a polyolefin, preferably polypropylene, provides a resin from which cement adherent fibers may be produced.Type: GrantFiled: January 3, 1986Date of Patent: December 1, 1987Assignee: Exxon Chemical Patents Inc.Inventors: James J. McAlpin, Wai Y. Chow
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Patent number: 4222986Abstract: The fouling of autorefrigeration polymerization systems because of entrained particles in the vaporized solvent-diluent is substantially reduced by returning the recycle solvent-diluent into the reaction zone through nozzles which provide a solvent-diluent spray of an average droplet size of less than 1000 microns, preferably between about 225 and 300 micron average particle size, which spray removes major amounts of entrained particles down to 5 microns in size. The solvent diluent may be an inert material or unreacted alpha-olefin, such as propylene.Type: GrantFiled: January 9, 1979Date of Patent: September 16, 1980Assignee: Exxon Research & Engineering Co.Inventors: Stuart B. Smith, James J. McAlpin, Jose M. A. Peruyero, Ronald L. Hazelton, Edward F. Upchurch
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Patent number: 4058652Abstract: The fouling of autorefrigeration polymerization systems because of entrained particles in the vaporized solvent-diluent is substantially reduced by returning the recycle solvent-diluent into the reaction zone through nozzles which provide a solvent-diluent spray of an average droplet size of less than 1000 microns, preferably between about 225 and 300 micron average particle size, which spray removes major amounts of entrained particles down to 5 microns in size. The solvent diluent may be an inert material or unreacted alpha-olefin, such as propylene.Type: GrantFiled: February 10, 1976Date of Patent: November 15, 1977Assignee: Exxon Research & Engineering Co.Inventors: Stuart B. Smith, James J. McAlpin, Jose M. A. Peruyero, Ronald L. Hazelton, Edward F. Upchurch
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Patent number: 3974237Abstract: A process for the copolymerization of alpha-olefins to form a block olefinic copolymer. In these processes solid polymeric alpha-olefin which contains an active catalyst is fed into two parallel fluid-bed reactors and concurrently, two different, gaseous, olefinic monomer streams are cyclically fed into first one reactor and then the other. The block olefinic copolymer is continuously withdrawn from the reactors during the cyclic injection thereinto.Type: GrantFiled: February 21, 1975Date of Patent: August 10, 1976Assignee: Exxon Research and Engineering CompanyInventors: Kenneth H. Brumbaugh, James J. McAlpin