Patents Represented by Attorney Richard J. Schlott

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  • Amide-imide resin of lowered water absorption for molding and composite applications
    Patent number: 4970292
    Abstract: Polyamide-imides derived from trimellitic acid compounds and an aromatic diamine are improved in moisture resistance when from 10 to about 90 mole % of the trimellitic acid compound is replaced by a biphenyl tetracarboxylic acid compound.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: November 13, 1990
    Assignee: Amoco Corporation
    Inventors: Ronald E. Bockrath, Robert B. Hanson
  • Damage tolerant fiber-reinforced composites based on cyanate ester/urea thermosetting composition
    Patent number: 4931496
    Abstract: Fiber-reinforced compositions comprising a structural fiber and a cyanate ester resin formulation having an N-substituted urea compound as a latent cure accelerator provide rapid-curing prepreg with good out-time characteristics. The prepreg may be used to form composite articles with good toughness and excellent retention of properties on extended exposure to moisture at elevated temperatures.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: June 5, 1990
    Assignee: Amoco Corporation
    Inventors: Shahid P. Qureshi, Hugh C. Gardner, Richard H. Newman-Evans
  • Thermosetting composition comprising cyanate ester, urea compound and epoxy resin
    Patent number: 4918157
    Abstract: Urea compounds having a plurality of substituents selected from hydrogen, substituted hydrocarbyl radicals and unsubstituted hydrocarbyl radicals are good latent cure accelerators for thermosetting cyanate resin formulations. The resulting cyanate resin formulations are useful as coatings, adhesives and as impregnating resins, particularly in applications where extended storage at or near room temperature is desired.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: April 17, 1990
    Assignee: Amoco Corporation
    Inventors: Hugh C. Gardner, Richard H. Newman-Evans
  • Epoxy resins based on tetraglycidyl diamines
    Patent number: 4891408
    Abstract: Novel tetraglycidates have the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen, alkyl of 1 to 8 carbon atoms, perfluoroalkyl, or cycloalkylidene of 5 to 7 carbon atoms. Epoxy resin systems exhibiting good tensile properties and moisture sensitivity can be made by copolymerizing the tetraglycidates with a polyamine curing agent. Prepregs can be made by combining the epoxy resin systems with a fiber reinforcement. The epoxy resin system may include a co-epoxide.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: January 2, 1990
    Assignee: Amoco Corporation
    Inventor: Richard H. Newman-Evans
  • Miscible blends of an amide and/or imide containing polymer and a polyarylate
    Patent number: 4879354
    Abstract: Described herein are miscible blends of polycarbonomides, defined as amide and/or imide containing polymers, and a polyarylate or arylate-carbonate copolymer which are useful in the manufacture of extruded sheets, high temperature connectors, aircraft and mass transportation vehicle interiors, injection molded articles, and extruded profiles and thermoformable articles.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: November 7, 1989
    Assignee: Amoco Corporation
    Inventors: James E. Harris, Markus Matzner, Lloyd M. Robeson
  • Thermoset composition comprising aromatic cyanate ester of allyl ether of bisphenol
    Patent number: 4861823
    Abstract: Novel curable resin compositions are disclosed containing an aromatic cyanate ester and an allyl ether of a bisphenol as a modifier. These compositions provide improved prepregs and composites. Additional modifiers including epoxy resins and bismaleimides may be included.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: August 29, 1989
    Assignee: Amoco Corporation
    Inventor: Shahid P. Qureshi
  • Method of producing carbon fibers by overwrappings tows
    Patent number: 4861575
    Abstract: Carbon fibers may be made by a process comprising:overwrapping a multifilament polyacrylonitrile tow with a thread of material to maintain the tow as an integral bundle, followed bystabilizing said tow by heating in an oxidizing atmosphere at a temperature between about 180.degree. and about 400.degree. C., thereby oxidizing the filaments comprising said tow, followed bycarbonizing the tow thus stabilized by heating at a temperature sufficient to effect carbonization, thereby forming a carbon fiber.The carbon fibers may be used to make reinforced composites in thermoplastic or thermosetting matrix resins, particularly prepreg.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: August 29, 1989
    Assignee: Amoco Corporation
    Inventor: Chris D. Levan
  • Bismaleimide formulations containing olefinic ether modifiers
    Patent number: 4853449
    Abstract: Novel bismaleimide resin formulations are described which contain olefinic ether reactive diluents. These formulations provide a combination of prepreg processing characteristics and thermal and mechanical properties unavailable from other reactive diluents. Preferred diluents contain one or more alkyl ether groups.
    Type: Grant
    Filed: January 7, 1988
    Date of Patent: August 1, 1989
    Assignee: Amoco Corporation
    Inventor: Linda A. Domeier
  • Preparation of thermoformed plastics articles
    Patent number: 4824907
    Abstract: Moulded articles of uniform wall thickness are prepared by vacuum-forming or thermoforming a composition comprising a uniform blend of, as base resin, a moulding grade resin having a continuous phase of a first copolymer of a styrenic monomer and an ethylenically unsaturated nitrile and a minor proportion of, as additive resin, a second copolymer of a styrenic monomer and an ethylenically unsaturated nitrile having an ultra high molecular weight, the forming operation being carried out at least 50.degree. C. above the glass transition temperature of the base resin and at a stress level of at most 1 MPa.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: April 25, 1989
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Harmen Z. K. Coster
  • Epoxy resins based on tetraglycidyl diamines
    Patent number: 4814414
    Abstract: Novel 3-ring tetraglycidates having the formula ##STR1## wherein ##STR2## Y=halogen, C.sub.1 -C.sub.4 alkyl; and n=0 to 4, are disclosed.Epoxy resin systems exhibiting good tensile properties and moisture sensitivity can be made by copolymerizing the tetraglycidates with a polyamine curing agent. Prepregs can be made by combining the epoxy resin systems with a fiber reinforcement. The epoxy resin system may include a co-epoxide.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: March 21, 1989
    Assignee: Amoco Corporation
    Inventor: Richard H. Newman-Evans
  • Ethylenically-unsaturated ethers of alkenyl phenols as reactive diluents for bismaleimides
    Patent number: 4812511
    Abstract: Ethylenically-unsaturated ethers of alkenyl phenols are useful as reactive diluents for bismaleimides. Formulations comprising bismaleimides and the reactive diluents of this invention are particularly useful for producing heat and moisture resistant fiber-reinforced composites.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: March 14, 1989
    Assignee: Amoco Corporation
    Inventor: Linda A. Domeier
  • Hot-melt prepreg tow process
    Patent number: 4804509
    Abstract: Process for producing resin-impregnated fiber tow or strand in the form of prepreg tape which includes unique coating wheels for surface-coating the strand with molten, flowable resin and a kneading section to work the strand and disperse the molten resin uniformly among and between the individual fibers of the strand. The strand, after chilling, has good dimensional stability and is useful as prepreg in forming composite structures.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: February 14, 1989
    Assignee: Amoco Corporation
    Inventors: Richard G. Angell, Jr., Michael J. Michno, Jr., John M. Konrad, Kenneth E. Hobbs
  • Cyanate ester with urea latent cure accelerator
    Patent number: 4804740
    Abstract: Urea compounds having a plurality of substituents selected from hydrogen, substituted hydrocarbyl radicals and unsubstituted hydrocarbyl radicals are good latent cure accelerators for thermosetting cyanate resin formulations. The resulting cyanate resin formulations are useful as coatings, adhesives and as impregnating resins, particularly in applications where extended storage at or near room temperature is desired.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: February 14, 1989
    Assignee: Amoco Corporation
    Inventors: Hugh C. Gardner, Richard H. Newman-Evans
  • Aromatic maleimide-isomaleimide compound
    Patent number: 4794190
    Abstract: Alpha-(4-maleimidophenyl)-alpha'-(4-isomaleimidophenyl) diisopropyl benzene, as a novel composition of matter. The compound, which may be used as a component of curable thermoset resins or as a unique, difunctional synthesis intermediate having non-symmetrical reactivity, may be prepared from the corresponding bis-maleamic acid by dehydrating at or below ordinary, ambient temperatures, using acetic anhydride or a similar dehydrating agent.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: December 27, 1988
    Assignee: Amoco Corporation
    Inventors: Linda A. Domeier, Elke M. Clark
  • Polyaryl ether sulphones
    Patent number: 4785072
    Abstract: Aryl ether sulfone polymers comprising a 4,4'-bis-phenylsulfonyl biphenyl and at least two additional arylene structural units exhibit improved toughness and stress crack resistance and a reduced tendency toward crystallization. The polymers and soluble and film-forming from solution, and may be used as coating and impregnating resins for producing laminates, fiber-reinforced composites and the like.
    Type: Grant
    Filed: August 4, 1987
    Date of Patent: November 15, 1988
    Assignee: Amoco Corporation
    Inventors: James E. Harris, Louis M. Maresca, Markus Matzner
  • Thermoset composition comprising aromatic cyanate ester, allyl ethers of bisphenol and bismaleimide
    Patent number: 4774282
    Abstract: Novel curable resin compositions are disclosed containing an aromatic cyanate ester and an allyl ether of a bisphenol as a modifier. These compositions provide improved prepregs and composites. Additional modifiers including epoxy resins and bismaleimides may be included.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: September 27, 1988
    Assignee: Amoco Corporation
    Inventor: Shahid P. Qureshi
  • Impact resistant matrix resins for advanced composites
    Patent number: 4760106
    Abstract: Described herein is a composition which contains a specific group of hardeners, an epoxy resin and a thermoplastic polymer. When combined with a structural fiber the composition produces composites which have improved impact resistance, improved tensile properties and high compressive properties.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: July 26, 1988
    Assignee: Amoco Corporation
    Inventors: Hugh C. Gardner, Michael J. Michno, Jr., George L. Brode, Robert J. Cotter
  • Stabilized olefin polymers
    Patent number: 4755546
    Abstract: Thermal stabilization of olefin polymers, particularly polypropylene. Stabilization is accomplished by means of an ester of a pentaerythritol monoacetal. The ester contains a phenolic group.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: July 5, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Ingenuin Hechenbleikner, William P. Enlow
  • Thermoplastic composites comprising a polyaryl ether sulphone matrix resin
    Patent number: 4755556
    Abstract: Composites comprising structural fibers such as carbon fibers and, as the matrix resin, an aryl ether sulfone polymer comprising a 4,4'-bis-phenylsulfonyl biphenyl and at least two additional arylene structural units. The matrix resins exhibit improved toughness and stress crack resistance and a reduced tendency toward crystallization. The polymers are soluble and film-forming from solution, and may be used as coating and impregnating resins for producing the laminates and fiber-reinforced composites of this invention.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: July 5, 1988
    Assignee: Amoco Corporation
    Inventors: James E. Harris, Michael J. Michno, Jr.
  • Novel oligomeric diamine hardeners and their use for curing epoxy resin systems
    Patent number: 4746718
    Abstract: Diamines of the structure ##STR1## Wherein X is --SO.sub.2 -- or --CO--, Y is O or S, and Ar is a linear aryl ether moiety comprising from 1 to 80 aryl rings, are epoxy resin curing agents providing cured resins with improved moisture resistance and toughness. The resins are particularly useful in preparing prepregs and composites.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: May 24, 1988
    Assignee: Amoco Corporation
    Inventors: Hugh C. Gardner, Linda A. Domeier