Patents by Inventor Henry S. Hopkins, Jr.

Henry S. Hopkins, Jr. 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).

  • Polyisocyanurate foams of improved friability and process of preparing same
    Patent number: 4568701
    Abstract: In a process of preparing a polyisocyanurate foam, which process comprises: reacting a plasticized polyisocyanate in the presence of a trimerization catalyst and an expanding amount of an inert blowing agent to provide a polyisocyanurate foam, the improvement which comprises: carrying out the reaction in the presence of from about four to twenty percent by weight of a surface-active organic silicone compound characterized by an active hydrogen functionality, and having a hydroxyl number of greater than about 30 and an equivalent weight of less than about 2000 and in the presence of a nonvolatile plasticizer to provide a polyisocyanurate foam of improved friability and good flame, heat and stability properties.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: February 4, 1986
    Assignee: General Latex and Chemical Corporation
    Inventor: Henry S. Hopkins, Jr.
  • Reduced-friability, highly cross-linked, flame-resistant, polyurethane foams
    Patent number: 4071482
    Abstract: Highly flame-resistant polyurethane foams of improved friability and reduced brittleness without a corresponding substantial increase in flame-spread or smoke-generation characteristics are prepared by incorporating into a foamable polyurethane composition an amount of a liquid organic carbonate, such as ethylene or propylene carbonate.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: January 31, 1978
    Assignee: General Latex and Chemical Corporation
    Inventors: Henry S. Hopkins, Jr., Donald L. Vargo
  • Polyisocyanurate foams prepared by a cocatalyst system
    Patent number: 4036792
    Abstract: Polyisocyanurate foamable compositions, polyisocyanurate foams and a process of preparing such foams wherein the foam consists essentially of recurring isocyanurate linkages, the foam exhibiting good friability properties and prepared by reacting a polyisocyanate in the presence of a cocatalyst system comprising a trimer catalytic amount of an alkylaminoalkyl phenol, and an amount of from about 1 to 15% by weight of the dialkylaminoalkyl phenol of a triethylene diamine or homolog thereof.
    Type: Grant
    Filed: July 16, 1975
    Date of Patent: July 19, 1977
    Assignee: General Latex and Chemical Corporation
    Inventor: Henry S. Hopkins, Jr.
  • Polyisocyanurate compositions and foams of improved friability and process of preparing same
    Patent number: 4033908
    Abstract: In a process of preparing a polyisocyanurate foam, which process comprises: reacting a polyisocyanate in the presence of a trimerization catalyst and an expanding amount of an inert blowing agent to provide a polyisocyanurate foam, the improvement which comprises: carrying out the reaction in the presence of a plasticizing amount of a nonvolatile liquid carbonate to produce a polyisocyanurate foam having improved friability and dimensional stability properties.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: July 5, 1977
    Assignee: General Latex and Chemical Corporation
    Inventors: Henry S. Hopkins, Jr., Donald L. Vargo