Patents by Inventor Susan U. McMonigal

Susan U. McMonigal 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).

  • One package stable etch resistant coating process
    Patent number: 5256452
    Abstract: A stable one package etch-resistant film-forming composition is disclosed. The composition includes a polyepoxide component having an epoxy equivalent weight on resin solids of less than about 600. The composition further includes a polyacid curing agent having an average acid functionality of greater than 2. The composition is substantially free of basic esterification catalyst, has a cured softening point of greater than about 20.degree. C., and is stable for use as a single-component composition. Also disclosed is a process for applying a color-plus-clear composite coating to a substrate which includes applying a acid-catalyzed thermosetting film-forming composition to a substrate to form a basecoat. The process also comprises applying a stable etch-resistant film-forming composition to the basecoat which includes a polyepoxide and a polyacid curing agent as described above, wherein the topcoat is substantially free of basic esterification catalyst, has a cured softening point of greater than about 20.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: October 26, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Susan U. McMonigal, Debra L. Singer, Dennis A. Simpson, Joseph A. Klanica, Michael A. Mayo
  • One package stable etch resistant coating
    Patent number: 5196485
    Abstract: A stable one package etch-resistant film-forming composition is disclosed. The composition includes a polyepoxide component having an epoxy equivalent weight on resin solids of less than about 600. The composition further includes a polyacid curing agent having an average acid functionality of greater than 2. The composition is substantially free of basic esterification catalyst, has a cured softening point of greater than about 20.degree. C., and is stable for use as a single-component composition. Also disclosed is a process for applying a color-plus-clear composite coating to a substrate which includes applying a acid-catalyzed thermosetting film-forming composition to a substrate to form a basecoat. The process also comprises applying a stable etch-resistant film-forming composition to the basecoat which includes a polyepoxide and a polyacid curing agent as described above, wherein the topcoat is substantially free of basic esterification catalyst, has a cured softening point of greater than about 20.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: March 23, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Susan U. McMonigal, Debra L. Singer, Dennis A. Simpson, Joseph A. Klanica, Michael A. Mayo