Patents Assigned to StyroChem Delaware, Inc.
  • Processes for preparing patterns for use in metal castings
    Patent number: 6710094
    Abstract: The present invention is directed to processes for forming styrenic polymers, and their related end uses. In particular, the present invention is directed to processes for preparing patterns for use in metal castings.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: March 23, 2004
    Assignee: StyroChem Delaware, Inc.
    Inventor: Fred Sonnenberg
  • Processes for forming styrene/methyl methacrylate copolymers
    Patent number: 6502621
    Abstract: Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and methyl methacrylate. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded. The methods are useful, for example, in forming expandable polymeric particles. The expandable polymer particles are useful in processes such as forming patterns for lost foam molding techniques.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: January 7, 2003
    Assignee: StyroChem Delaware, Inc.
    Inventors: Fred Sonnenberg, Vesselin Danailov Miladinov
  • Processes for forming styrenic copolymers
    Patent number: 6497269
    Abstract: Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and one or more acrylic monomers. The monomers can be polymerized in the presence of polymeric seeds. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded. The methods are useful, for example, in forming expandable polymeric particles. The expandable polymer particles are useful in processes such as forming patterns for lost foam molding techniques.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: December 24, 2002
    Assignee: StyroChem Delaware, Inc.
    Inventors: Fred Sonnenberg, Richard Anton Schwarz
  • Processes for forming styrenic copolymers
    Publication number: 20020088597
    Abstract: Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and one or more acrylic monomers. The monomers can be polymerized in the presence of polymeric seeds. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded. The methods are useful, for example, in forming expandable polymeric particles. The expandable polymer particles are useful in processes such as forming patterns for lost foam molding techniques.
    Type: Application
    Filed: January 22, 2002
    Publication date: July 11, 2002
    Applicant: StyroChem Delaware, Inc.
    Inventors: Fred Sonnenberg, Richard Anton Schwarz
  • Processes for forming styrenic copolymers
    Patent number: 6360807
    Abstract: Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and one or more acrylic monomers. The monomers can be polymerized in the presence of polymeric seeds. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded. The methods are useful, for example, in forming expandable polymeric particles. The expandable polymer particles are useful in processes such as forming patterns for lost foam molding techniques.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: March 26, 2002
    Assignee: StyroChem Delaware, Inc.
    Inventors: Fred Sonnenberg, Richard Anton Schwarz
  • Processes for forming styrenic polymers
    Patent number: 6355697
    Abstract: Polymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, in the presence of polymeric, emulsion based seeds. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded. The methods are useful, for example, in forming polystyrene which can then be expanded to form expanded polystyrene. The methods utilize suspending agents, and surfactant can be used in an amount insufficient to form an emulsion.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: March 12, 2002
    Assignee: StyroChem Delaware, Inc.
    Inventor: Richard Anton Schwarz
  • Treatment for reducing residual carbon in the lost foam process
    Patent number: 6303664
    Abstract: The evaporative casting of molten metals has been shown to produce castings having smooth surfaces with significantly less signs of carbon deposits thereon by using an expandable vinyl aromatic polymer containing a bromine-attached aliphatic or aromatic flame retardant.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: October 16, 2001
    Assignee: StyroChem Delaware, Inc.
    Inventors: Fred Sonnenberg, Kyösti Matti Taristo, Tom Verner Johannes Johansson