Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1982-11-15
1984-01-31
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
264 54, 521185, 521918, C08J 908, C08J 910
Patent
active
044290616
ABSTRACT:
High performance foams comprised of thermotropic liquid crystal polymers are provided. The lightweight rigid foams exhibit a combination of excellent properties including enhanced mechanical properties such as high strength to weight ratio, high flame and thermal stability, and excellent solvent resistance. The foams fabricated from such polymers have significantly reduced anisotropy compared to unfoamed polymers. The transverse mechanical properties are enhanced by foaming relative to the percentage density reduction due to the foaming. The physical properties of the foams are further enhanced by heat treatment as the core of foams of thermotropic liquid crystal polymers consists of highly oriented cell walls which can exhibit greater enhancement upon heat treatment than is exhibited by the core of the unfoamed polymer.
REFERENCES:
patent: 4161470 (1979-07-01), Calundann
patent: 4219461 (1980-08-01), Calundann
patent: 4224264 (1980-09-01), Ort
patent: 4238600 (1980-12-01), Jackson et al.
patent: 4256624 (1981-03-01), Calundann
Celanese Corporation
Foelak Morton
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