Patents by Inventor John M. Trowell

John M. Trowell 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).

  • Polyester polyols from tall oil fatty acid, maleic anhydride, and aromatic polyester polyols
    Patent number: 5075417
    Abstract: Polyester polyols are prepared by reacting a multifunctional adduct (e.g., maleic anhydride (MA)) and tall oil fatty acid, (TOFA), and then esterifying/transesterifying the MA/TOFA reaction product with an excess of aromatic polyester polyols (preferably such polyols are produced from dimethyl terephthalate (DMT) process residue and polyhydric alcohols). The polyester polyols may be used in the manufacture of rigid polyurethane (PUR) and rigid urethane-modified polyisocyanurate (PUR/PIR) foams.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: December 24, 1991
    Assignee: Cape Industries
    Inventors: John M. Trowell, Billy S. Jessup, Jr.
  • Aromatic polyester polyols from dimethyl terephthalate process residue and tall oil fatty acids
    Patent number: 4897429
    Abstract: A polyester polyol composition is prepared by (1) reacting 5 to 40 percent tall oil fatty acids, (b) 20 to 80 percent dimethyl terephthalate process residue and (c) 20 to 60 percent polyhydric alcohol, based on the weight of the reaction mixture, in the presence of an esterification/transesterification catalyst while continuously removing water and methanol that are formed during the reaction, to form a first reaction product containing residual carboxylic acid functionality and (2) reacting 1 to 25 percent of at least one alkylene carbonate, or an equimolar amount of at least one alkylene oxide, with the residual carboxylic acid functionality in the presence of a catalyst. The preferred alkylene carbonate/oxide is ethylene or propylene (or a mixture thereof) carbonate/oxide. A foamed laminate made from the polyester polyol has reduced surface friability and faster rates of cure.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: January 30, 1990
    Assignee: Cape Industries
    Inventors: John M. Trowell, Scott F. Lange
  • Use of antimony compounds to retard catalyst deactivation in foam-forming compositions containing aromatic polyester polyols
    Patent number: 4761433
    Abstract: Organic antimony compounds can be used to retard deactivation of urethane catalysts during storage of a B side formulation containing aromatic polyester polyols, used in the manufacture of rigid polyurethane foams.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: August 2, 1988
    Assignee: Hercules Incorporated
    Inventors: John R. Panchak, John M. Trowell
  • Polyols from tall oil and aromatic polyester polyols
    Patent number: 4758602
    Abstract: Disclosed are polyester polyols prepared by esterifying tall oil with an excess of aromatic polyester polyols. The polyester polyols that are produced by this process are compatible with a trichlorofluoromethane blowing agent and are suitable for use in the manufacture of polyurethane and urethane-modified polyisocyanurate foams.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: July 19, 1988
    Assignee: Hercules Incorporated
    Inventor: John M. Trowell
  • Polyols from scrap polyethylene terephthalate and dimethyl terephthalate process residue
    Patent number: 4720571
    Abstract: Disclosed is a mixture of terephthalic acid ester polyols for use in the preparation of rigid polyurethane and polyisocyanurate foams. The polyols are prepared by reacting scrap polyethylene terephthalate, dimethyl terephthalate process residue and an excess of a mixture of glycols.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: January 19, 1988
    Assignee: Hercules Incorporated
    Inventor: John M. Trowell