Patents Represented by Attorney Roger K. Graham

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  • Modified latex polymer composition
    Patent number: 5252657
    Abstract: This invention relates to modified aqueous dispersions of water-insoluble latex polymer prepared by swelling an initial water-insoluble latex polymer, prepared by emulsion polymerization, with additional ethylenically unsaturated monomer, including at least one monomer with two or more sites of ethylenic unsaturation, and subsequently polymerizing the additional monomer within the swollen latex particles.
    Type: Grant
    Filed: February 2, 1993
    Date of Patent: October 12, 1993
    Assignee: Rohm and Haas Company
    Inventors: Lawrence S. Frankel, Gerald L. Jones, Donald A. Winey
  • Polymer blends including ionomers
    Patent number: 5252667
    Abstract: Poly(vinyl chloride) exhibits a useful combination of acceptable flow for injection molding, improved processability, and acceptable heat distortion resistance and toughness when modified with a multi-stage polymer having as one stage an alkyl (meth)acrylate polymer or copolymer containing a low level of a copolymerized unsaturated acid partly to completely in the form of its alkali metal salt. In preferred compositions, the melt viscosity under injection molding conditions of the blend will be equal to or less than that of the PVC alone.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: October 12, 1993
    Assignee: Rohm and Haas Company
    Inventor: Hsing-Yeh Parker
  • Stabilization of methacrylic polymers against sterilizing radiation
    Patent number: 5250589
    Abstract: The present invention is directed to methacrylic polymer compositions which may be used to form plastic products which have increased resistance to sterilizing radiation, such as gamma or electron beam irradiation.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: October 5, 1993
    Assignee: Rohm and Haas Company
    Inventors: Paul J. Keating, Donald E. Roach
  • Segmented copolymers
    Patent number: 5247024
    Abstract: An improved process for the preparation of segmented copolymers of polyolefins and poly(methacrylates) is disclosed.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: September 21, 1993
    Assignee: Rohm and Haas Company
    Inventors: John Natoli, Min-Yin Chang
  • Graft copolymers and a process for their preparation
    Patent number: 5232985
    Abstract: Higher yields of graft copolymer occur when a catalytic amount of base is present during the grafting reaction. The resulting blends of ungrafted polymer with higher graft-copolymer content exhibit improved toughness and clarity.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: August 3, 1993
    Assignee: Rohm and Haas Company
    Inventor: Michael P. Hallden-Abberton
  • Modified latex polymer compositions
    Patent number: 5227433
    Abstract: This invention relates to modified aqueous dispersions of water-insoluble latex polymer prepared by swelling an initial water-insoluble latex polymer, prepared by emulsion polymerization, with additional ethylenically unsaturated monomer, including at least one monomer with two or more sites of ethylenic unsaturation, and subsequently polymerizing the additional monomer within the swollen latex particles.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: July 13, 1993
    Assignee: Rohm and Haas Company
    Inventors: Lawrence S. Frankel, Gerald L. Jones, Donald A. Winey
  • Process for graft copolymers of polyglutarimides and aromatic polyesters
    Patent number: 5223578
    Abstract: Polymers containing glutarimide units and also acid and/or anhydride units are compatible with polyesters, such as poly(ethylene terephthalate) to form blends. Chemical interaction (grafting) between the polyester and the acid/anhydride groups of the polyglutarimide occurs on processing the blends. The extent of grafting and the properties of the resultant blend can be enhanced by appropriate catalysts.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: June 29, 1993
    Assignee: Rohm and Haas Company
    Inventor: Michael P. Hallden-Abberton
  • Co-microagglomeration of emulsion polymers (encapsulated core/shell additives for PVC)
    Patent number: 5221713
    Abstract: Core/shell additives, useful in modifying the processing and/or physical properties of poly(vinyl chloride) and other thermoplastic matrix polymers, are prepared separately at small particle sizes by emulsion polymerization, co-agglomerated, further encapsulated by a final shell, and isolated by spray-drying or coagulation. The isolated powders are readily re-dispersed to their original particle sizes in the matrix polymer.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: June 22, 1993
    Assignee: Rohm and Haas Company
    Inventors: James S. Kempner, Hsing-Yeh Parker, Janis C. Stevenson, Morris C. Wills, Judith L. Allison
  • Stabilization of methacrylic polymers against sterilizing radiation
    Patent number: 5216060
    Abstract: The present invention is directed to methacrylic polymer compositions which may be used to form plastic products which have increased resistance to sterilizing radiation, such as gamma or electron beam irradiation.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: June 1, 1993
    Assignee: Rohm and Haas Company
    Inventors: Paul J. Keating, Donald E. Roach
  • Polymer blends including ionomers
    Patent number: 5202381
    Abstract: This invention relates to improved poly(vinyl chloride) compositions which contain ionomeric additive polymers, and to a process for preparing such compositions.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: April 13, 1993
    Assignee: Rohm and Haas Company
    Inventor: Hsing-Yeh Parker
  • Poly(vinyl chloride) blends and additives therefor
    Patent number: 5194498
    Abstract: This invention relates to poly(vinyl chloride) injection molding compositions which contain novel additive polymers which modify the rheology characteristics of the composition, and to the novel additive polymers themselves.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: March 16, 1993
    Assignee: Rohm and Haas Company
    Inventors: Janis C. Stevenson, Hsing-Yeh Parker
  • Polymeric blends
    Patent number: 5189097
    Abstract: Polymers containing a high percentage of vinyl alcohol units may be blended with copolymers of alkyl methacrylates and N-vinyllactams or N-vinylamides and processed into sheet, film, fiber and other objects which exhibit an useful balance of barrier and strength properties.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: February 23, 1993
    Assignee: Rohm and Haas Company
    Inventors: Edward E. LaFleur, Robert M. Amici, William J. Work
  • Thermal stabilizers
    Patent number: 5164434
    Abstract: The invention is directed to stabilizer compositions, to polymers containing three stabilizer compositions for use as additives in polymers, and to polymeric products which contain these additives. The stabilizer compositions comprise a compositon of: a) at least two hindered phenols and b) a sulfide. These compositions are admixed with polymers to provide polymeric additives to improve the physical and mechanical properties of polymers matrices.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: November 17, 1992
    Assignee: Rohm and Haas Company
    Inventors: Susan M. Liwak, Nazir A. Memon
  • Polyglutarimides with improved properties
    Patent number: 5159058
    Abstract: Polyglutarimides exhibit improved optical properties, as well as lowered content of non-aqueous volatiles, when the molten polyglutarimide is mixed with water, methanol, ethanol, or mixtures thereof, and the water, methanol, ethanol, or mixtures thereof is removed prior to isolation and processing of the polyglutarimide.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: October 27, 1992
    Assignee: Rohm and Haas Company
    Inventors: Robert E. Jerman, William T. Freed, Leslie A. Cohen, Lucinda F. Buhse, Glenn W. Miller
  • Polyglutarimides with improved properties
    Patent number: 5126409
    Abstract: Polyglutarimides exhibit improved optical properties, as well as lowered content of non-aqueous volatiles, when the molten polyglutarimide is mixed with water, methanol, ethanol, or mixtures thereof, and the water, methanol, ethanol, or mixtures thereof is removed prior to isolation and processing of the polyglutarimide.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: June 30, 1992
    Assignee: Rohm and Haas Company
    Inventors: Robert E. Jerman, William T. Freed, Leslie A. Cohen, Lucinda F. Buhse, Glenn W. Miller
  • Thermoplastic polymer compositions containing melt-rheology modifiers
    Patent number: 5102952
    Abstract: Vinyl aromatic polymers having a minimum molecular weight of about 500,000, and preferably of about 1,500,000, are blended at levels of from about 1 to about 25% with thermoplastic resins to improve the melt rheology of the thermoplastic resins and facilitate blow molding, thermoforming, extrusion and similar processes.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: April 7, 1992
    Assignee: Rohm and Haas Company
    Inventor: Nazir A. Memon
  • Stabilization of methacrylic polymers against sterilizing radiation
    Patent number: 5102940
    Abstract: The present invention is directed to methacrylic polymer compositions which may be used to form plastic products which have increased resistance to sterilizing radiation, such as gamma or electron beam irradiation.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: April 7, 1992
    Assignee: Rohm and Haas Company
    Inventors: Paul J. Keating, Donald E. Roach
  • Polymers stabilized against light and heat degradation
    Patent number: 5066696
    Abstract: Tertiary-alkyl-substituted melamines stabilize certain polymers against the deleterious effects of light and heat.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: November 19, 1991
    Assignee: Rohm and Haas Company
    Inventors: Newman M. Bortnick, Robert A. Wanat, Darnel Degraff
  • Novel damping compositions
    Patent number: 5066708
    Abstract: A process of using compositions comprising certain thermoplastic elastomeric polymers for damping and damping compositions comprising soft thermoset polymer containing microscopically discrete segments of said thermoplastic elastomeric polymers.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: November 19, 1991
    Assignee: Rohm and Haas Company
    Inventors: Robert D. Koller, Sr., Carl P. Hemenway
  • Clear, impact-resistant plastics
    Patent number: 5063259
    Abstract: Plastics prepared from blends of polymers of methyl methacrylate with heterogeneous core/shell polymers having an poly(alkyl acrylate) core and a poly(alkyl methacrylate)shell exhibit improved color when the heterogeneous core/shell polymer is treated with a reducing agent.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: November 5, 1991
    Assignee: Rohm and Haas Company
    Inventors: Robert A. Wanat, Charles C. Crabb