Accession Number:

ADD015889

Title:

Interpenetrating Polymer Network Acoustic Damping Material.

Descriptive Note:

Patent, Filed 28 Aug 91, patented 6 Jul 93,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1993-07-06

Pagination or Media Count:

5.0

Abstract:

Improved acoustic damping materials comprise interpenetrating polymer networks having a soft polymer component and a hard polymer component. The soft polymer component, constituting from 50 to 90, preferably 70, percent by weight of the material, is made by polymerizing an aromatic diisocyanate with a polyalkylene ether glycol, and the hard polymer component is a vinyl ester polymer made by polymerization of a vinyl ester resin such as the acrylate or methacrylate ester of the diglycidyl ether of a polyphenol. Optionally, the vinyl ester resin may be brominated, whereby increased fire retardance is conferred upon the interpenetrating polymer network. The mixture is cured at room temperature.

Subject Categories:

  • Polymer Chemistry
  • Fluid Mechanics
  • Acoustics
  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE