Patents by Inventor Dennis G. Peiffer

Dennis G. Peiffer 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).

  • Patent number: 6194622
    Abstract: A method for inhibiting the formation of gas hydrates in a petroleum fluid having hydrate-forming constituents is claimed. More specifically, the method can be used to treat a petroleum fluid, such as natural gas conveyed in a pipe, to inhibit the formation of a hydrate flow restriction in the pipe. The hydrate inhibitors used for practicing the method comprise substantially water soluble homopolymers and copolymers of surfactant monomers, wherein the surfactant monomer unit may be represented by the formula: where R1 and R2 independently are hydrogen or a methyl group, M is a metal cation, n is a number sufficient to produce a number average molecular weight between 1000 and 6,000,000, and o is a number from 1 to 5.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: February 27, 2001
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Dennis G. Peiffer, Christine A. Costello, Lawrence D. Talley, Pamela J. Wright
  • Patent number: 6100224
    Abstract: A copolymer comprising units of an unsaturated dicarboxylic monomer and an ethylene .alpha.-olefin macromer is disclosed. The macromer is an unsaturated ethylene .alpha.-olefin polymer comprising units of from ethylene and at least one .alpha.-olefin represented by the formula CH.sub.2 .dbd.CHR.sup.a, wherein R.sup.a is a C.sub.1 to C.sub.18 linear alkyl group or a C.sub.3 to C.sub.18 branched alkyl group; the ethylene .alpha.-olefin polymer has a number average molecular weight of from about 500 to about 100,000; and at least about 30% of the unsaturation in the ethylene .alpha.-olefin polymer is terminal vinylidene. The copolymer has a carbon-carbon backbone and contains succinic groups and hydrocarbyl groups. The copolymer can be derivatized by reaction with nucleophilic reactants including monoamines, polyamines, monoalcohols, polyols, amino alcohols, reactant metal compounds and mixtures thereof. The derivatized copolymers can be post-treated (e.g., borated) with one or more post-treating agents (e.g.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: August 8, 2000
    Assignee: Exxon Chemical Patents Inc
    Inventors: Dennis G. Peiffer, Kenneth Lewtas, Robert D. Lundberg, Pamela J. Wright, Antonio G. Lazarus, Jacob Emert
  • Patent number: 6060563
    Abstract: Graft copolymers having cationic units pendant to the backbone chain are disclosed. These polymers are prepared by reacting a polymer containing halogenated paramethylstyrene units in the chain, e.g., a brominated copolymer of isobutylene and para-methylstyrene, with an anionically polymerized polymer made using an organolithium initiator compound having the formula R.sub.1 R.sub.2 Z R.sub.3 --Li where R.sub.1 and R.sub.2 are alkyl radicals, R.sub.3 is a direct link or an organic radical and Z is nitrogen or phosphorous. Reaction of the anionically polymerized polymer having an R.sub.1 R.sub.2 Z R.sub.3 --end group with the halogenated polymer leads to graft polymers coupled by a quaternary ammonium or phosphonium groups.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: May 9, 2000
    Assignee: Exxon Research and Engineering Co
    Inventors: Dennis G. Peiffer, Hsien-Chang Wang, Pamela Jean Wright, Joseph A. Sissano, Lewis J. Fetters, Louise M. Wheeler, Rebecca L. Rucker
  • Patent number: 5883173
    Abstract: The present invention relates to a latex comprising water and a layered material intercalated with a polymer. The invention also relates to a nanocomposite material comprising a layered material intercalated with a polymer. The latex can be produced by forming a dispersion of layered material in water, adding surfactant, polymerizable monomer or monomers, and a polymerization initiator to the mixture and then polymerizing the monomer to form a latex. The latex can also be formed from preformed polymers. Composite materials formed from latexes produced by either method have improved mechanical properties and reduced air permeability.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: March 16, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Chester W. Elspass, Dennis G. Peiffer, Edward Nathan Kresge, Dong-Tsai Hsieh, James Joseph Chludzinski, Keng S. Liang
  • Patent number: 5627225
    Abstract: This invention provides for novel road paving binder compositions and the method of making them. One embodiment is a road paving binder composition of a storage stable blend of a sulfonated, unhydrogenated random copolymer of styrene and butadiene having a sulfonation level of from 1 to 100 meq S0.sub.3 H/100 g of polymer and a sulfonated asphalt. Another is a method of making a storage stable polymer modified asphalt composition by combining a sulfonated unhydrogenated random styrene butadiene copolymer having a sulfonation level of from about 1 to 100 meq S0.sub.3 H per 100 g of polymer and a sulfonated asphalt at a temperature of at least about 180.degree. C. to produce a storage stable polymer modified asphalt. Yet another is a method of making a storage stable polymer modified asphalt by combining a sulfonated unhydrogenated random styrene and butadiene copolymer having a sulfonation level of from about 1 to 100 meq S0.sub.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: May 6, 1997
    Assignee: Exxon Research and Engineering Company
    Inventors: Martin L. Gorbaty, Christian G. Lenoble, Nicholas C. Nahas, Dennis G. Peiffer
  • Patent number: 5580844
    Abstract: According to the present invention, there is provided a coated breaker chemical in which the coating comprises a blend of a neutralized sulfonated ionomer and asphalt. Preferably, the coating contains from about 1 to 20 wt. % asphalt and from 99 to 80 wt. % of the neutralized sulfonated ionomer. In a particularly preferred embodiment of the present invention, the coating contains about 7 wt. % asphalt and about 93 wt. % of the neutralized sulfonated ionomer.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: December 3, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Vijay Swarup, Dennis G. Peiffer, Marty L. Gorbaty
  • Patent number: 5413856
    Abstract: There is provided a coated agricultural substrate in which the coating comprises a blend of a neutralized sulfonated ionomer and asphalt. Preferably, the coating contains from about 1 to 20 wt. % asphalt and from 99 to 80 wt. % of the neutralized sulfonated ionomer. In a particularly preferred embodiment of the present invention, the coating contains about 7 wt. % asphalt and about 93 wt. % of the neutralized sulfonated ionomer.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: May 9, 1995
    Assignee: Exxon Research and Engineering Co.
    Inventors: Vijay Swarup, Albert J. Geiger, Evelyn N. Drake, Dennis G. Peiffer, Martin L. Gorbaty
  • Patent number: 5348994
    Abstract: Disclosed in this invention are novel road paving binder compositions and the method of making same. The compositions are made by combining an asphalt that contains sulfonate or sulfonic acid groups, a polymer preferably of butyl rubbers, styrene-butadiene linear diblock polymer, styrene-butadiene-styrene linear or radial triblock polymer and EPDM that has been sulfonated, and mixtures thereof, and a basic neutralizing agent that contains cations having a valence from +1 to +3. The amounts of each are effective to allow formation of one continuous phase or two interdispersed phases that do not segregate on standing at elevated temperatures associated with road paving. The amount of polymer is an amount less than 7 wt. % of total polymer-asphalt composition that is sufficient to produce an asphaltic composition having a viscosity at 135.degree. C. in the range of from about 150 cPs to about 2000 cPs or from about 3000 cPs to about 8000 cPs.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: September 20, 1994
    Assignee: Exxon Research & Engineering Co.
    Inventors: Martin L. Gorbaty, Dennis G. Peiffer, Daniel J. McHugh
  • Patent number: 5294672
    Abstract: The present invention relates to thermoplastic reinforced elastomeric blend compositions which exhibit improved tensile strengths, wherein the elastomeric blend compositions comprises a blend of a metal neutralized sulfonated polymer with about 1 to about 40 weight percent of a metal neutralized copolymer of ethylene and methacrylate.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: March 15, 1994
    Assignee: Exxon Research & Engineering Co.
    Inventor: Dennis G. Peiffer
  • Patent number: 5288773
    Abstract: This invention relates to polymeric compositions comprising unhydrogenated or substantially unhydrogenated sulfonated copolymers of (poly)styrene and a (poly)conjugated diene, e.g., (poly)butadiene or (poly)isoprene, preferably (poly)butadiene containing less than about 1.0 wt. %, preferably less than about 0.8 wt. % sulfur, preferably from about 0.2 to about 0.7, more preferably from about 0.22 to about 0.6 wt. % sulfur, as well as base-neutralized products thereof. The invention includes the polymeric compositions produced by the process of sulfonating unhydrogenated copolymers of (poly)styrene and a conjugated diene, e.g., (poly)butadiene or (poly)isoprene, preferably (poly)butadiene, which process optionally includes base neutralizing the sulfonated copolymer. This invention further relates to the process for making these novel copolymers comprising combining an unhydrogenated or substantially unhydrogenated copolymer of (poly)styrene and a conjugated diene, e.g.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: February 22, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: Martin L. Gorbaty, Dennis G. Peiffer
  • Patent number: 5096603
    Abstract: A water soluble polymer which is characterized by the formula: ##STR1## wherein x is 50 mole percent or 662/3 mole percent or 75 mole percent and y+z is 50 mole percent, when x is 50 mole percent, y+z is 331/3 mole percent, when x is 662/3 mole percent, and y+z is 25 mole percent, when x is 75 mole percent, wherein the molar ratio of y to z is about 100:1 to 1:100, and M.sup.+ is hydrogen or a metal cation selected from the group consisting of lead, aluminum, iron and Groups IA, IIA, IB and IIB of the Periodic Table of Elements and the level of sulfonation based upon the styrene monomer is about 75 to about 100 mole percent, and R is an alkyl group having about 6 to about 22 carbon atoms.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: March 17, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Dennis G. Peiffer, Jan Bock, Julie Elward-Berry
  • Patent number: 5095073
    Abstract: A water soluble and brine soluble rod-like polymer having recurring any units of the formula: ##STR1## wherein n is a 2 to 22 straight chained or branched chained alkyl or cycloalkyl group and the level of sulfonation is about 20 to about 100 mole %, and M is a tertiary amine or a metal cation selected from the group consisting of aluminum, iron, lead, Groups IA, IIA, IB and IIB of the Periodic Table of Elements.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: March 10, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Dennis G. Peiffer, Jeff J. Kaladas
  • Patent number: 5093448
    Abstract: The synthesis of a novel family of cationic monomers capable of forming viscoelastic fluids are described within. These monomers are formed primarily through the reaction of allyl halides and dimethyl alkylamines. The rheological properties of the fluids can be dramatically modified with changes in alkyl length and/or counterion structure. In addition, it is noted that these viscoelastic fluids have properties quite similar to conventional polymer solutions even though the former structures are held together through physical forces and not through chemical bonding as in the latter materials. In addition, the properties of this unique family of cationic monomers are capable of forming viscoelastic fluids in high brine solutions. Even though the counterion attached to the monomer contributes greatly to the rheological properties, addition of soluble acid, bases and salts do not destroy (through ion exchange mechanisms) the viscoelastic properties of these fluids.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: March 3, 1992
    Assignee: Exxon Research and Engineering Company
    Inventor: Dennis G. Peiffer
  • Patent number: 5071934
    Abstract: A novel family of cationic monomers and copolymers containing an alkyl moiety of variable carbon length can be prepared. The cationic-type copolymers are formed through conventional synthesis techniques and the solutions formed with these materials possess rheological properties markedly different than conventional cationic polyelectrolytes.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: December 10, 1991
    Assignee: Exxon Research and Engineering Company
    Inventor: Dennis G. Peiffer
  • Patent number: 5068278
    Abstract: Intramolecular polymer complexes synthesized from acrylamide, sodium styrene sulfonate, and methacrylamidopropyltrimethylammonium chloride, having viscosity-polymer concentration relationships that are invarient with the addition of high levels of acid, base, or salt to the fresh water system. These complexes possess a "balance" between conventional polyelectrolyte and polyampholyte behavior.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: November 26, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: Dennis G. Peiffer, Robert D. Lundberg
  • Patent number: 5066753
    Abstract: The synthesis of a novel family of cationic monomers capable of forming viscoelastic fluids are described within. These monomers are formed primarily through the reaction of allyl halides and dimethyl alkylamines. The rheological properties of the fluids can be dramatically modified with changes in alkyl length and/or counterion structure. In addition, it is noted that these viscoelastic fluids have properties quite similar to conventional polymer solutions even though the former structures are held together through physical forces and not through chemical bonding as in the latter materials. In addition, the properties of this unique family of cationic monomers are capable of forming viscoelastic fluids in high brine solutions. Even though the counterion attached to the monomer contributes greatly to the rheological properties, addition of soluble acid, bases and salts do not destroy (through ion exchange mechanisms) the viscoelastic properties of these fluids.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: November 19, 1991
    Assignee: Exxon Research and Engineering Company
    Inventor: Dennis G. Peiffer
  • Patent number: 5064903
    Abstract: The present invention relates to elastomeric reinforced thermoplastic blend compositions which exhibit improved mechanical properties, wherein the thermoplastic blend compositions comprise a blend of a metal neutralized copolymer of ethylene and methacrylate with about 1 to about 40 weight percent of a metal neutralized EPDM terpolymer.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: November 12, 1991
    Assignee: Exxon Research and Engineering Company
    Inventor: Dennis G. Peiffer
  • Patent number: 5036136
    Abstract: A solution comprising(a) water; and(b) about 0.01 to about 10 weight % of a water soluble polymerizable monomer characterized by the formula ##STR1## wherein n is a 6-22 straight chained or branched chained alkyl or cycloalkyl group and the ration of t to s is about 1/5 to 5/1.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: July 30, 1991
    Assignee: Exxon Research and Engineering Company
    Inventor: Dennis G. Peiffer
  • Patent number: 5026490
    Abstract: A water soluble polymer which is characterized by the formula: ##STR1## wherein x is 50 mole percent or 662/3 mole percent or 75 mole percent and y+z is 50 mole percent, when x is 50 mole percent, y+z is 331/3 mole percent, when x is 662/3 mole percent, and y+z is 25 mole percent, when x is 75 mole percent, wherein the molar ratio of y to z is about 100:1 to 1:100, and M.sup.+ is hydrogen or a metal cation selected from the group consisting of lead, aluminum, iron and Groups IA, IIA, IB and IIB of the Periodic Table of Elements and the level of sulfonation based upon the styrene monomer is about 75 to about 100 mole percent.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: June 25, 1991
    Assignee: Exxon Research & Engineering
    Inventors: Dennis G. Peiffer, Jan Bock, Julie Elward-Berry
  • Patent number: H1077
    Abstract: The present invention relates to a process for the viscosification of an aqueous liquid which includes the steps of forming a solvent system of an organic liquid or oil and a polar cosolvent, the polar cosolvent being less than about 15 weight percent of the solvent system, a viscosity of the solvent system being less than about 1,000 cps; forming an interpolymer complex of neutralized sulfonated polymer (water insoluble) and copolymer of styrene/vinylpyridine in the solvent system to form a solution, a concentration of the water insoluble interpolymer complex polymer in the solution being about 0.01 to about 0.5 weight percent, a viscosity of the solution being less than about 200 cps; and admixing or contacting said solution with about 5 to about 500 volume percent water, the water being immiscible with the organic liquid and the polar cosolvent and interpolymer complex transferring from the organic liquid to the water phase, thereby causing the water phase to gel (i.e., thicken).
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: July 7, 1992
    Inventors: Dennis G. Peiffer, Robert D. Lundberg, Ilan Duvdevani