Thermoplastic syntactic foams and their preparation
AssigneeMcDonnell Douglas Corporation
InventorsEdward S. Harrison, Edward J. Ruskowski, James Melquist
Life of this patent
Estimating the term…
Abstract
A low-density, porous material is prepared by mixing together microballoons and an oligomeric precursor to a polyesterimide polymer. The oligomeric precursor has an initial viscosity sufficiently low that it can flow and wet the microballoons when first heated to a polymerization processing temperature, and thereafter polymerize. Fibers may be controllably incorporated into the material during processing to impart specific properties, and air may be controllably incorporated into the material during processing to further decrease its density.
Claims10
A structural, low-density article, comprising:
- a microballoon first component;
- and
- a polyetherimide polymer second component which is wetted to the microballoons and binds the microballoons together in an array.
Dependencies are inferred from the claim text.