Patents Assigned to C.P. Chemical Company, Inc.
  • Phenal-urea-formaldehyde condensation product
    Patent number: 4239881
    Abstract: This invention relates to cellular plastic compositions of condensation products of phenol-urea and formaldehyde useful for thermal and acoustical insulation and methods for their preparation in which the phenol is present in amounts of about 1 to about 20 percent by weight wherein the condensation product prior to foaming and setting as a rigid cellular plastic has a viscosity at room temperature of approximately 30 to 36 seconds, No. 1 Zahn cup, and a pH maintained in the range of about 6 to 8.
    Type: Grant
    Filed: December 27, 1978
    Date of Patent: December 16, 1980
    Assignee: C.P. Chemical Company, Inc.
    Inventor: Walter Hasselman, Jr.