Low density, microcellular foams, preparation, and articles

Details Low density, microcellular foams, preparation, and articles Low density, microcellular foams, preparation, and articles

1982-03-03

1984-02-07

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 49, 521 61, 521143, 524486, 524579, C08J 926

Patent

active

044304510

ABSTRACT:
A microcellular low density foam of poly(4-methyl-1-pentene) which is particularly useful for forming targets for inertial confinement fusion has been developed. Articles made from the foam have been machined to tolerances of 0.0001 inch, although the densities of the fragile foam are low (about 10 to about 100 mg/cc) and the cell sizes are small (about 10 to about 30 .mu.m). Methods for forming the foam and articles are given; and the yield strength of the foam of the invention is higher than was obtained in other structures of this same material.

REFERENCES:
patent: 3029215 (1962-04-01), Campbell
patent: 3308073 (1967-03-01), Kepple
patent: 3607793 (1971-09-01), Mahlmas
"Prep. of Multishell ICF Target Plastic Foam Cushion Materials by Thermally Induced Phase Inversion Processes", by Young et al., pp. 1-9.

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