Patents by Inventor Brad A. Pearson

Brad A. Pearson 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).

  • Polyurethane prepolymer compositions, foams made therefrom and methods of making each thereof
    Patent number: 5968995
    Abstract: A polyisocyanate prepolymer composition is comprised of the reaction product of (a) a polyisocyanate having an average functionality of at least 2 and containing at least about 20 percent by weight of a diisocyanate monomer, (b) a monohydric alcohol and (c) a polyol having an average hydroxyl functionality of at least about 1.8 to at most about 3.2, wherein the prepolymer composition has (i) an amount of isocyanate groups by weight sufficient to react with water in the absence of a supplemental blowing agent to make a foam, (ii) at most about 10.0 percent by weight of the diisocyanate monomer and (iii) an amount of the polyisocyanate that is capped by the monohydric alcohol sufficient to prevent gelling of the prepolymer composition. The prepolymer composition may be formed by contacting (i) an organic polyisocyanate having an average isocyanate functionality of at least about 2.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: October 19, 1999
    Assignee: The Dow Chemical Company
    Inventors: Sidky D. Rizk, Jerry Lynn Spradling, Brad A. Pearson
  • Polyurethane prepolymer compositions, foams made therefrom and methods of making each thereof
    Patent number: 5817860
    Abstract: A polyisocyanate prepolymer composition is comprised of the reaction product of (a) a polyisocyanate having an average functionality of at least 2 and containing at least about 20 percent by weight of a diisocyanate monomer, (b) a monohydric alcohol and (c) a polyol having an average hydroxyl functionality of at least about 1.8 to at most about 3.2 wherein the prepolymer composition has (i) an amount of isocyanate groups by weight sufficient to react with water in the absence of a supplemental blowing agent to make a foam, (ii) at most about 10.0 percent by weight of the diisocyanate monomer and (iii) an amount of the polyisocyanate that is capped by the monohydric alcohol sufficient to prevent gelling of the prepolymer composition. The prepolymer composition may be reacted with water to form a polyurethane foam.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: October 6, 1998
    Assignee: Essex Specialty Products, Inc.
    Inventors: Sidky D. Rizk, Jerry Lynn Spradling, Brad A. Pearson