Accession Number : ADD016567
Title : Polyurethane-Epoxy Interpenetrating Polymer Network Acoustic Damping Material.
Descriptive Note : Patent, Filed 28 Aug 91, patented 19 Jul 94,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Sorathia, Usman A ; Yeager, William L ; Dapp, Timothy L
Report Date : 19 Jul 1994
Pagination or Media Count : 8
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 percent by weight of the material, is a polyurethane made by polymerization of a diisocyanate with a polyether glycol, and the hard polymer component is made by polymerization of bisphenol A diglycidyl ether, with boron trichloride amine complex as a curing agent.
Descriptors : *ACOUSTICS, *DAMPING, *NETWORKS, *POLYMERS, *PATENTS, *URETHANES, *EPOXY COMPOUNDS, *GLYCIDYL ETHER, AMINES, BORON, CURING, CURING AGENTS, ETHERS, GLYCOLS, MATERIALS, POLYETHERS, POLYMERIZATION, WEIGHT, COMPOSITE MATERIALS, ISOCYANATES, CHLORIDES
Subject Categories : Polymer Chemistry
Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE