Flexible polyester foams
US6054500A · kind A · utility
4Cited by
0References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Dec 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A foamed cellular material which can be obtained from foamed aromatic polyester resins with a bulk density of 50 to 700 kg/m3 by heating in vacuum to temperatures which are higher than the Tg of the material and lower than its melting point. The foamed material, generally in the form of a sheet or panel, has high-level characteristics in terms of flexibility and dimensional thermostability depending on the degree of crystallinity after the vacuum treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.