Patents by Inventor Fred M. Sonnenberg

Fred M. Sonnenberg 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).

  • Method for improving the expandability of styrenic polymer particles
    Patent number: 5240967
    Abstract: A method for improving the expandability of styrenic polymer particles is disclosed. The method comprises copolymerizing a styrenic monomer with an amount of an acrylate monomer effective to improve the expandability of the particles without adversely affecting their heat sensitivity. Polymer foams of low density can be prepared with reduced amounts of blowing agents.
    Type: Grant
    Filed: February 17, 1993
    Date of Patent: August 31, 1993
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Fred M. Sonnenberg, Dennis M. Hajnik, William J. Poole
  • Tertiary ethers as blowing agents for foam polymer systems
    Patent number: 5075346
    Abstract: The use of tertiary ethers as blowing agent allows the preparation of lower density foams from many types of polymeric materials.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: December 24, 1991
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Fred M. Sonnenberg, Joseph A. Verdol
  • Process for the preparation of fire-retardant expandable thermoplastic beads
    Patent number: 5030663
    Abstract: Fire-retardant expandable vinyl aromatic polymer beads are prepared by an aqueous suspension method whereby a bromophenyl allyl ether fire-retardant agent and a volatile aliphatic hydrocarbon foaming agents are incorporated into particles of a thermoplastic such as polystyrene. The beads are useful in the preparation of molded foam articles having excellent resistance to flame.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: July 9, 1991
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Fred M. Sonnenberg, Dennis M. Hajnik
  • Method of adding flame retardant to vinyl aromatic polymers made in a one-step process
    Patent number: 4994499
    Abstract: A method of introducing flame retardants into expandable vinyl aromatic polymer beads made in a one-step process is disclosed. Flame retardants with good solubility in blowing agents are introduced after monomer conversion is substantially complete, resulting in vinyl aromatic polymer beads with low residual monomer content.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: February 19, 1991
    Assignee: Arco Chemical Technology, Inc.
    Inventors: Fred M. Sonnenberg, Dennis M. Hajnik
  • Process for the preparation of expandable vinyl aromatic polymer particles containing hexabromocyclododecane
    Patent number: 4980382
    Abstract: Fire-retardant expandable vinyl aromatic polymer beads are prepared by an aqueous suspension method whereby micronized hexabromocyclododecane and a volatile aliphatic hydrocarbon foaming agent are incorporated into particles of a thermoplastic such as polystyrene. The beads are useful in the preparation of molded foam articles having excellent resistance to flame.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: December 25, 1990
    Assignee: ARCO Chemical Technology, Inc.
    Inventors: Fred M. Sonnenberg, Dennis M. Hajnik
  • Use of rubbery copolymers to decrease coffee leakage in foam cups
    Patent number: 4785022
    Abstract: Various rubber polymers and copolymers have been added as a coating to seed beads of vinyl aromatic polymers. Cups molded from these beads were coffee leak tested and generally exhibited enhanced retention of coffee.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: November 15, 1988
    Assignee: Arco Chemical Company
    Inventors: Fred M. Sonnenberg, Dennis M. Hajnik
  • Coating of flame retardants onto a seed bead
    Patent number: 4761432
    Abstract: Various flame retardant agents have been added as a coating to seed beads of vinyl aromatic polymers. The resulting products have high resistance to burning and permit the use of lower concentrations of the retardant.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: August 2, 1988
    Assignee: Arco Chemical Company
    Inventors: Fred M. Sonnenberg, Dennis M. Hajnik
  • Foam cups with enhanced coffee retention
    Patent number: 4720429
    Abstract: Enhanced coffee retention properties are achieved in thermoplastic polymer foam cups molded from thermoplastic polymer particles by coating at least a portion of the surfaces of the particles before molding with a fluorosurfactant.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: January 19, 1988
    Assignee: Atlantic Richfield Company
    Inventor: Fred M. Sonnenberg
  • Foam cups with enhanced coffee retention
    Patent number: 4703065
    Abstract: Enhanced coffee retention properties are achieved in thermoplastic polymer foam cups molded from thermoplastic polymer particles by coating at least a portion of the surfaces of the particles before molding with a fluorosurfactant.
    Type: Grant
    Filed: February 5, 1987
    Date of Patent: October 27, 1987
    Assignee: Atlantic Richfield Company
    Inventor: Fred M. Sonnenberg
  • Bibenzyl-4-sulfonyl chloride
    Patent number: 4088683
    Abstract: Sulfone polymers are disclosed containing bibenzyl sulfone repeating units having the formula ##STR1## These polymers exhibit good mechanical properties, toughness, flexibility, thermal and chemical stability and can be heat processed, extruded, drawn or otherwise formed into shaped articles having a high degree of strength and good dielectric properties.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: May 9, 1978
    Assignee: American Hoechst Corporation
    Inventor: Fred M. Sonnenberg