Patents by Inventor Stephen F. Hahn

Stephen F. Hahn 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).

  • Publication number: 20100093942
    Abstract: In one aspect the invention provides a melt process for preparing a functionalized olefin multiblock interpolymer, said process comprising grafting onto the backbone of the olefin multiblock interpolymer at least one compound comprising at least one “amine-reactive” group to form a grafted olefin multiblock interpolymer, and reacting a primary-secondary diamine or an alkanolamine with the grafted olefin multiblock interpolymer, without the isolation of the grafted olefin multiblock interpolymer.
    Type: Application
    Filed: December 21, 2007
    Publication date: April 15, 2010
    Applicant: Dow Global Technlogies Inc.
    Inventors: H. Craig Silvis, Stephen F. Hahn, David F. Pawlowski, Patricia Ansems, Laura K. Mergenhagen, Hamed Lakrout
  • Publication number: 20100067258
    Abstract: The present invention is a bulk light diffuser material based upon a hydrogenated block copolymer, but including a particulate light diffusing component. The material may be in the form of a film, a sheet or a molded article. When present as a sheet having a thickness of 2 millimeters, the sheet has a percent total transmittance of at least 50% and a haze of at least 70%, measured according to the American Society for Testing and Materials (ASTM) standard D 1003.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 18, 2010
    Inventors: Stephen F. Hahn, Kenneth W. Williams, Phillip L. Wing, Weijun Zhou
  • Publication number: 20090082486
    Abstract: A curable epoxy resin composition including (a) a thermosettable epoxy resin; and (b) an amphiphilic block copolymer containing at least one epoxy resin miscible block segment and at least one epoxy resin immiscible block segment; wherein the immiscible block segment comprises at least one polyether structure provided that the polyether structure of said immiscible block segment contains at least one or more alkylene oxide monomer units having at least four carbon atoms, such that when the epoxy resin composition is cured, the toughness of the resulting cured epoxy resin composition is increased. The amphiphilic block copolymer is preferably an all polyether block copolymer such as a PEO-PBO diblock copolymer or a PEO-PBO-PEO triblock copolymer.
    Type: Application
    Filed: November 2, 2005
    Publication date: March 26, 2009
    Applicants: DOW CHEMICAL TECHNOLOGIES INC., UNIVERSITY OF MINNESOTA
    Inventors: Frank S. Bates, Stephen F. Hahn
  • Publication number: 20080287559
    Abstract: A thermally stable brominated butadiene copolymer, such as brominated styrene/butadiene block copolymer, brominated random styrene/butadiene copolymer or brominated styrene/butadiene graft copolymer, preparation of the brominated butadiene copolymers, use of the brominated butadiene copolymers as a flame retardant additive and polymeric compositions, both foamed and non-foamed, that incorporate a flame-retarding amount of brominated butadiene copolymer.
    Type: Application
    Filed: October 23, 2006
    Publication date: November 20, 2008
    Inventors: Bruce A. King, William G. Stobby, Daniel J. Murray, Anteneh Z. Worku, Inken Beulich, Sheila M. Tinetti, Stephen F. Hahn, Ray E. Drumright
  • Publication number: 20080188623
    Abstract: The present invention yields a triallyl phosphate (TAP)-mediated, rheology-modified polymer being prepared in a reaction from a reaction mixture made from or containing (a) a free-radical, chain-scissionable organic polymer and (b) TAP, wherein the TAP-mediated, rheology-modified polymer has extensional viscosity at Hencky strains above one greater than that of the free-radical, chain-scissionable organic polymer and/or a Relaxation Spectra Index (RSI) greater than that of the free-radical, chain-scissionable organic polymer.
    Type: Application
    Filed: November 3, 2006
    Publication date: August 7, 2008
    Applicants: Dow Global Technologies Inc., Queen's University at Kingston
    Inventors: Bharat I. Chaudhary, Malcolm F. Finlayson, Stephen F. Hahn, Stephane Costeux, John Scott Parent, Saurav S. Sengupta
  • Publication number: 20080087380
    Abstract: The present invention is an article of construction formed from an article adhesively-bonded to a layering material through (a) reactive coupling of a functionalized nitroxide or (b) the adhesion of components in a polymer matrix made from or containing a polymer, an organic peroxide, and a functionalized nitroxide. The initial article may be expanded. The initial article may be expanded. It may also be polar or nonpolar. Similarly, the layering material may be polar or nonpolar. Other embodiments of the present invention are described, including other articles and methods for preparing the articles.
    Type: Application
    Filed: October 13, 2006
    Publication date: April 17, 2008
    Applicant: Dow Global Technologies Inc.
    Inventors: Miguel A. Prieto Goubert, Peter Sandkuehler, Antonio Batistini, Sandra Hofmann, Stephen F. Hahn, Mohamed Esseghir, Monika Plass, Mark F. Sonnenschein, H. Craig Silvis, Hamed Lakrout, Kevin J. Bouck
  • Patent number: 6953868
    Abstract: The present invention is a method for oxyfunctionalizing, that is, introducing oxygen functionality to, a polyolefin such as polypropylene and poly(ethylene-alt-propylene). The polyolefin is contacted with an oxygen source such as a persulfate and catalytic amounts of a metal porphyrin complex under mild conditions to yield an oxyfunctionalized polymer that has a polydispersity that is very similar to that of the starting polymer.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: October 11, 2005
    Assignees: Dow Global Technologies Inc., Regents of the University of Minnesota
    Inventors: Nicole K. Boaen, Marc A. Hillmyer, Stephen F. Hahn
  • Patent number: 6914091
    Abstract: Flexible hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, coatings, injection molded articles, blow or rotational molded articles and pultruded articles.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: July 5, 2005
    Assignee: The Dow Chemical Company
    Inventors: Robert J. Donald, Stephen F. Hahn, James E. Pate, III
  • Patent number: 6844399
    Abstract: Sulfonated substantially random interpolymers made from monomer components comprise from 1 to 65 mole percent of (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinylidene monomer, or (c) a combination of at least one vinyl or vinylidene aromatic monomer and at lest one hindered aliphatic or cycloaliphatic vinylidene monomer, and from 35 to 99 mole percent of at least one aliphatic ?-olefin having from 2 to 20 carbon atoms; and optionally, from 0 to 20 mole percent of a diene containing from 4 to 20 carbon atoms; wherein the sulfonated interpolymer contains at least one mer (or moiety) of a group represented by the formula —SO3?M where M is hydrogen or a group 1, 7 or 12 metal in ionic form or combination thereof. Blends of these polymers with polyamides and polyolefins are made.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: January 18, 2005
    Assignee: Dow Global Technologies, Inc.
    Inventors: Yunwa W. Cheung, Stephen F. Hahn, James C. Stevens, Francis J. Timmers, Gregory F. Schmidt, Thoi H. Ho, Robert H. Terbrueggen
  • Publication number: 20040249086
    Abstract: The present invention is a method for oxyfunctionalizing, that is, introducing oxygen functionality to, a polyolefin such as polypropylene and poly(ethylene-alt-propylene). The polyolefin is contacted with an oxygen source such as a persulfate and catalytic amounts of a metal porphyrin complex under mild conditions to yield an oxyfunctionalized polymer that has a polydispersity that is very similar to that of the starting polymer.
    Type: Application
    Filed: April 26, 2004
    Publication date: December 9, 2004
    Inventors: Nicole K. Boaen, Marc A. Hillmyer, Stephen F. Hahn
  • Patent number: 6815475
    Abstract: Compositions comprising hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, pultruded articles, fibers, coated articles, injection molded articles and blow or rotational molded articles.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: November 9, 2004
    Assignee: Dow Global Technologies Inc.
    Inventors: Robert J. Donald, Jerry L. Hahnfeld, Gary D. Parsons, Stephen F. Hahn, Rajen M. Patel, Calvin P. Esneault, Laura M. Phipps, James E. Pate, III
  • Patent number: 6777082
    Abstract: The present invention relates to a fiber produced form a composition comprising at least one hydrogenated block copolymer and, optionally, at least one other polymer selected from the group consisting of a reactive tailored liquid polyurethane, an elastomeric or sulfonated ethylene/vinyl aromatic interpolymer, an elastomeric ethylene/C3-C20 &agr;-olefin interpolymer, an C3-C20 &agr;-olefin/conjugated diene interpolymer, an elastic polypropylene polymer, an enhanced polypropylene polymer, an elastomeric thermoplastic polyurethane, an elastic copolyester, a partially hydrogenated block copolymer, an elastic polyamide, a hydroxyl functionalized polyether (or polyetheramine), a styrene/conjugated diene interpolymer, and an elastomeric metallocene-catalyzed synthetic polymer or a blend or formulated system thereof.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: August 17, 2004
    Assignee: The Dow Chemical Company
    Inventors: Rajen M. Patel, Pak-Wing S. Chum, Stephen F. Hahn, Leonie K. Walsh, Rexford A. Maugans, Selim Bensason, Thoi H. Ho, Calvin P. Esneault
  • Patent number: 6632890
    Abstract: The present invention relates to hydrogenated block copolymers of vinyl aromatic polymer blocks and conjugated diene polymer blocks having specific total Mn and specific block Mn's such that advantageous properties are attained. The present invention also relates to hydrogenated pentablock copolymers thereof and specifically hydrogenated pentablock copolymers useful in thin walled injection molding applications.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: October 14, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Frank S. Bates, Chin Chu, Glenn H. Fredrickson, Stephen F. Hahn, Mary Ann Jones, Jerry L. Hahnfeld
  • Publication number: 20030149189
    Abstract: Sulfonated substantially random interpolymers made from monomer components comprise from 1 to 65 mole percent of (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinylidene monomer, or (c) a combination of at least one vinyl or vinylidene aromatic monomer and at lest one hindered aliphatic or cycloaliphatic vinylidene monomer, and from 35 to 99 mole percent of at least one aliphatic &agr;-olefin having from 2 to 20 carbon atoms; and optionally, from 0 to 20 mole percent of a diene containing from 4 to 20 carbon atoms; wherein the sulfonated interpolymer contains at least one mer (or moiety) of a group represented by the formula —SO3−M where M is hydrogen or a group 1, 7 or 12 metal in ionic form or combination thereof. Blends of these polymers with polyamides and polyolefins are made.
    Type: Application
    Filed: October 7, 2002
    Publication date: August 7, 2003
    Applicant: Dow Global Technologies Inc.
    Inventors: Yunwa W. Cheung, Stephen F. Hahn, James C. Stevens, Francis J. Timmers, Gregory F. Schmidt, Thoi H. Ho, Robert H. Terbrueggn
  • Publication number: 20030144418
    Abstract: Flexible hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, coatings, injection molded articles, blow or rotational molded articles and pultruded articles.
    Type: Application
    Filed: November 25, 2002
    Publication date: July 31, 2003
    Inventors: Robert J. Donald, Stephen F. Hahn, James E. Pate
  • Publication number: 20030119971
    Abstract: Compositions comprising hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, pultruded articles, fibers, coated articles, injection molded articles and blow or rotational molded articles.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 26, 2003
    Inventors: Robert J. Donald, Jerry L. Hahnfeld, Gary D. Parsons, Stephen F. Hahn, Rajen M. Patel, Calvin P. Esneault, Laura M. Phipps, James E. Pate
  • Patent number: 6583230
    Abstract: The present invention is a composition comprising an alternating hydrogenated block copolymer having at least two hydrogenated vinyl aromatic polymer blocks and at least one conjugated diene polymer block, wherein the number average molecular weights (Mn) of each block can be different.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: June 24, 2003
    Assignee: The Dow Chemical Company
    Inventors: Stephen F. Hahn, Glenn H. Fredrickson, Cora M. Leibig, Molly T. Reinhardt
  • Patent number: 6559215
    Abstract: This invention is a composition comprising (a) an oligomer or polymer dispersible in an organic solvent, having a low dielectric constant, or being curable to form a material having a low dielectric constant, (b) at least one organic solvent and (c) less than 1000 parts by weight of a polymeric coating additive per million parts by weight of total composition (ppm). The polymeric additive is characterized in that it is miscible with component (a) and the solvent system but becomes incompatible with the mixture of component (a) and solvent during the coating process.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: May 6, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Lynne K. Mills, JoLee M. Dominowski, Gene D. Rose, Deidre A. Strand, Kenneth L. Foster, Stephen F. Hahn
  • Publication number: 20030065099
    Abstract: The present invention is directed to a hydrogenated block copolymer comprising a hydrogenated conjugated diene polymer block and at least one hydrogenated vinyl aromatic/(alpha-alkylstyrene) copolymer block.
    Type: Application
    Filed: August 20, 2002
    Publication date: April 3, 2003
    Inventors: Stephen F. Hahn, Frank S. Bates, Michelle L. Hudack, Jingjing Xu
  • Patent number: 6512049
    Abstract: Sulfonated substantially random interpolymers made from monomer components comprise from 1 to 65 mole percent of (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinylidene monomer, or (c) a combination of at least one vinyl or vinylidene aromatic monomer and at lest one hindered aliphatic or cycloaliphatic vinylidene monomer, and from 35 to 99 mole percent of at least one aliphatic &agr;-olefin having from 2 to 20 carbon atoms; and optionally, from 0 to 20 mole percent of a diene containing from 4 to 20 carbon atoms; wherein the sulfonated interpolymer contains at least one mer (or moiety) of a group represented by the formula —SO3M where M is hydrogen or a group 1, 7 or 12 metal in ionic form or combination thereof. Blends of these polymers with polyamides and polyolefins are made.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: January 28, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Yunwa W. Cheung, Stephen F. Hahn, James C. Stevens, Francis J. Timmers, Gregory F. Schmidt, Robert H. Terbrueggen, Thoi H. Ho