Patents Represented by Attorney Roger K. Graham

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  • Polymer blends
    Patent number: 5389724
    Abstract: Polymers containing a high percentage of vinyl alcohol units may be melt-blended with copolymers of alkyl(meth)acrylates and unsaturated organic acids. Flexible films are formed when one of the methacrylic monomers is a monoterminally (meth)acrylated oligomer or polymer of ethylene glycol or propylene glycol.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: February 14, 1995
    Assignee: Rohm and Haas Company
    Inventor: Edward E. LaFleur
  • Hot melt adhesives
    Patent number: 5378758
    Abstract: Polymers containing a high percentage of vinyl alcohol units may be blended with copolymers of alkyl methacrylates and unsaturated organic acids, the copolymers prefereably containing an adhesion-promoting functionality, the blend preferably containing low levels of a plasticizer to improve melt flow, and the blends in molten form utilized as hot melt adhesives for the bonding of wood, paper, and other celulosic articles.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: January 3, 1995
    Assignee: Rohm and Haas Company
    Inventors: Robert M. Amici, Newman M. Bortnick, Roger K. Graham, Edward E. LaFleur, William J. Work
  • Polymer blends
    Patent number: 5378759
    Abstract: Polymers containing a high percentage of vinyl alcohol units may be blended with copolymers of alkyl methacrylates and unsaturated organic acids and processed into sheet, film, fiber and other objects which exhibit an useful balance of barrier and strength properties.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: January 3, 1995
    Assignee: Rohm and Haas Company
    Inventors: Robert M. Amici, Edward E. LaFleur, William J. Work
  • Process for segmented copolymers
    Patent number: 5374686
    Abstract: An improved aqueous slurry process (with co-solvent) for the preparation of segmented copolymers of polyolefins and poly((meth)acrylates) is disclosed.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: December 20, 1994
    Assignee: Rohm and Haas Company
    Inventor: Richard R. Clikeman
  • Hot melt adhesives
    Patent number: 5362802
    Abstract: Polymers containing a high percentage of vinyl alcohol units, especially when treated to remove impurities, when blended with copolymers of alkyl (meth)acrylates, N-vinyllactams or N-vinylamides, and unsaturated acids, preferably further with a small amount of plasticizer, may be applied as hot melt adhesives to paper, wood, and other cellulosic articles.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: November 8, 1994
    Assignee: Rohm and Haas Company
    Inventors: Robert M. Amici, Newman M. Bortnick, Roger K. Graham, Edward E. LaFleur, William J. Work
  • Polymeric blends of polyvinyl alcohol copolymers with copolymers of unsaturated monomers
    Patent number: 5362803
    Abstract: Polymers containing a high percentage of vinyl alcohol units, when treated with acid to remove impurities, may be blended with low levels of copolymers of alkyl methacrylates and N-vinyllactams or N-vinylamides, optionally containing copolymerized acid, and processed into sheet, film, fiber and other objects which exhibit a useful balance of barrier and strength properties.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: November 8, 1994
    Assignee: Rohm and Haas Company
    Inventors: Edward E. LaFleur, Robert M. Amici, William J. Work
  • Hot melt adhesives made from the blend of polyvinyl alcohol copolymers and copolymers from unsaturated monomers
    Patent number: 5362801
    Abstract: Polymers containing a high percentage of vinyl alcohol units, especially when treated to remove impurities, when blended with copolymers of alkyl (meth)acrylates, N-vinyllactams or N-vinylamides, and unsaturated acids, preferably further with a small amount of plasticizer, may be applied as hot melt adhesives to paper, wood, and other cellulosic articles.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: November 8, 1994
    Assignee: Rohm and Haas Company
    Inventors: Robert M. Amici, Newman M. Bortnick, Roger K. Graham, Edward E. LaFleur, William J. Work
  • Polymer blends of polyglutarimides
    Patent number: 5362809
    Abstract: A polymer blend of a polyglutarimide and liquid crystalline copolyester polymer or benzimidazole polymer. The blend is a melt-compoundable polymer blend.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: November 8, 1994
    Assignee: Rohm and Haas Company
    Inventors: Michael P. Hallden-Abberton, Newman M. Bortnick, William J. Work
  • Thermoplastic polymer compositions containing melt-rheology modifiers
    Patent number: 5352500
    Abstract: Acrylic polymers having a minimum molecular weight of about 500,000, and preferably of about 1,500,000, are blended at levels of from 1 to 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: February 5, 1993
    Date of Patent: October 4, 1994
    Assignee: Rohm and Haas Company
    Inventor: Nazir A. Memon
  • Polyglutarimide/glass fiber combinations
    Patent number: 5344868
    Abstract: Glass-reinforced polyglutarimides exhibit improved impact resistance when low levels of phenoxy resin are incorporated into the blend.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: September 6, 1994
    Assignee: Rohm and Haas Company
    Inventors: Michael P. Hallden-Abberton, William J. Work, Mark A. Abramowicz, Phuong N. Duong
  • Moldable crystalline polyester composition
    Patent number: 5322663
    Abstract: A rapidly-crystallizing modified poly(ethylene terephthalate) contains an acrylic core/shell impact modifier, a small amount of a polycarbonate, and a small amount of a copolymer of ethylene with a vinyl or vinylidene monomer containing ester groups. Improved mold release and lessened plate-out are observed over other additive combinations.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: June 21, 1994
    Assignee: Rohm and Haas Company
    Inventors: Choung-Houng Lai, Jean M. Brady
  • Fiber-forming process from polymeric blends
    Patent number: 5322892
    Abstract: A melt process for forming fibers from blends of polymers containing a high percentage of vinyl alcohol units with terpolymers of alkyl methacrylates, unsaturated acids, anhydrides or glycidyl-containing esters, and N-vinyllactams or N-vinylamides is described.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: June 21, 1994
    Assignee: Rohm and Haas Company
    Inventors: Edward E. LaFleur, Robert M. Amici, William J. Work
  • Amorphous, aromatic polyester containing impact modifier
    Patent number: 5321056
    Abstract: Impact modifiers which produce transparent, high notched Izod impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with cores comprised mainly of rubbery polymers of diolefins and vinyl aromatic monomers and shells comprised mainly of styrene copolymers (e.g. styrene and hydroxyalkyl (meth)acrylate).
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: June 14, 1994
    Assignee: Rohm and Haas Company
    Inventors: William G. Carson, Choung-Houng Lai, Edward J. Troy
  • Segmented ionomeric copolymer
    Patent number: 5319031
    Abstract: A segmented ionomeric copolymer when blended with a polyolefin improves sag resistance.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: June 7, 1994
    Assignee: Rohm and Haas Company
    Inventors: Raymond G. Hamilton, Mark T. McCarty
  • Bilayer rear projection screens
    Patent number: 5307205
    Abstract: Efficient, lower weight, more versatile rear projection screens can be produced by combining in laminated form an unmodified clear matrix resin layer with a second sheet containing light diffusing polymer particles of specific size and size distribution.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: April 26, 1994
    Assignee: Rohm and Haas Company
    Inventors: Edward G. Ludwig, Jr., Patricia Maxson, John A. Dorazio
  • Graft copolymers of polyglutarimides and aromatic polyesters
    Patent number: 5276090
    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 catalyst.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: January 4, 1994
    Assignee: Rohm and Haas Company
    Inventor: Michael P. Hallden-Abberton
  • Encapsulated micro-agglomerated core/shell additives in poly(vinyl chloride) blends
    Patent number: 5276092
    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: March 25, 1993
    Date of Patent: January 4, 1994
    Assignee: Rohm and Haas Company
    Inventors: James S. Kempner, Hsing-Yeh Parker, Janis C. Stevenson, Morris C. Wills, Judith L. Allison
  • Aromatic polyester melt strength improver
    Patent number: 5268438
    Abstract: Melt strengths and melt viscosities of aromatic polyesters are increased substantially by the addition of small amounts of certain high molecular weight vinyl aromatic modifiers which disperse very readily in aromatic polyesters.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: December 7, 1993
    Assignee: Rohm and Haas Company
    Inventors: William G. Carson, Choung H. Lai, Nazir A. Memon
  • Stabilization of methacrylic polymers against sterilizing radiation
    Patent number: 5258423
    Abstract: The present invention is directed to methacrylic polymer compositions which may be used to form plastic products which have increased resistance to discoloration by sterilizing radiation, such as gamma or electron beam irradiation. The compositions, free from conventional ultraviolet stabilizers, contain .alpha.-hydroxyacids or esters thereof.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: November 2, 1993
    Assignee: Rohm and Haas Company
    Inventors: Charles C. Crabb, Robert A. Wanat, Paul J. Keating, Donald E. Roach
  • High gas barrier co-extruded multiplayer films
    Patent number: 5258230
    Abstract: By addition of methacrylate/unsaturated acid and/or vinyl amide copolymers, poly(vinyl alcohol) can be melt-processed and co-extruded with structural polymers like poly(ethylene terephthalate) to form multilayer films and objects with good adhesion between the components and good barrier properties. The films and objects can be separated and re-used by dissolution in water of the poly(vinyl alcohol)/methacrylate polymer blends and recovery of the structural polymer.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: November 2, 1993
    Assignee: Rohm and Haas Company
    Inventors: Edward E. LaFleur, William J. Work