Thermoplastic syntactic foams and their preparation
US5691390A · kind A · utility
18Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Mar 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.