Patents by Inventor Alejandro Shimazaki

Alejandro Shimazaki 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).

  • Polyisocyanate compositions for the preparation of flexible polyurethane foams
    Patent number: 6262139
    Abstract: The invention provides a liquid polyisocyanate prepolymer composition which is a result of combining about 50.0 to 90.0 percent by weight of an isocyanate blend (a.) having 55.0 to 75.0 weight percent 4,4′-MDI, 17.0 to 27.0 weight percent 2,4′-MDI, 1.0 to 10.0 weight percent 3-ring MDI oligomer, and 1.0 to 15.0 weight percent n-ring MDI oligomer (n greater than 3); about 5.0 to 30.0 weight percent of a polyhydroxy containing polyol (b.) having a molecular weight of from 700 to about 6,000; and about 15.0 to 75.0 weight percent of a toluene diisocyanate (c.). The resulting isocyanate prepolymer composition has a free NCO content of from about 30.0 to 45.0 weight percent and particularly desirable flow characteristics. The invention further provides a method of making an isocyanate prepolymer composition, a process of making a polyurethane foam utilizing the isocyanate prepolymer composition of the invention, and polyurethane foams produced by the disclosed process.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: July 17, 2001
    Assignee: BASF Corporation
    Inventors: Thirumurti Narayan, David J. Lovell, Alejandro Shimazaki